Method for starting water spraying in copper sulphide ore heap bioleaching

Disclosed is a method for starting water spraying in copper sulphide ore heap bioleaching, comprising the following steps: 1) judging the feasibility of starting copper sulphide ore water spraying: if the acid production potential of the ore is greater than the acid consumption potential, water spraying is started; and 2) starting the water praying: moisturising is performed with water in the heap construction process of the copper sulphide ore, and after the completion of the heap construction, spraying is performed with water, when the pH value of a leach liquor > 3.0, circulating spraying is performed, and when the pH value of the leach liquor is < 3.0, acidophilus iron and sulphur oxidation microorganisms are inoculated in the leach liquor as a spraying liquor, and circulating spraying is continued, to gradually increase the concentrations of acid, iron and copper in the system solution, so that the starting of the copper sulphide ore heap bioleaching is achieved.

Method for preprocessing scheelite and preparing ferro-tungsten

The invention relates to a method for tungsten hydrometallurgy, in particular to a method for preprocessing scheelite and preparing ferro-tungsten. The method comprises the following steps: preprocessing scheelite with hydrochloric acid and repeatedly utilizing remaining acid to decompose scheelite in an aright device having no pressure; and preprocessing slag to restore melting ferro-tungsten. Compared with the prior art, the method has the advantages as follows: in order to solve the defects in the background art, the closed circuit of hydrochloric acid is utilized to decompose scheelite, thereby reducing the consumption amount of hydrochloric acid and energy consumption, realizing the effective enrichment of CaCl2, reducing the production cost of subsidiary products, and improving the economic benefits of technology; the aright device having no pressure reduces the requirements on leaching equipment, and also reduces the investment of fixed assets; high-qualified ferro-tungsten can be ...

Treatment process of copper-iron-contained high-concentration acidic mine wastewater

The invention relates to a treatment process of copper-iron-contained high-concentration acidic mine wastewater. The treatment process comprises the following sequential process steps: (1) neutralization to remove iron; (2) solid-liquid separation; (3) biological sulfuration; (4) solid-liquid separation; and (5) biological purification for recovering valuable constituents in the wastewater and enabling yielding water to achieve an emission standard. The invention has the advantages of high removal rate of copper, iron and sulfate radicals, strong suitability, low treatment cost, environmental protection, good comprehensive recovery utilization effect, and the like and is particularly suitable for treating the copper-iron-contained high-concentration acidic mine wastewater generated in the copper-extracting production process by a biological wet method and in the mining process of copper sulphide.

Method for reducing content of impurity ions in leachate in ore dump leaching

The invention relates to a method for reducing the content of impurity ions in leachate in ore dump leaching, which comprises the following steps: (1) carrying out first dump leaching treatment on a first leaching unit and an acid solution to obtain the leachate; (2) the leaching liquid obtained in the step (1) serves as spraying liquid, the spraying liquid and at least one second leaching unit are subjected to second dump leaching treatment, and leaching liquid with purified impurities and enriched target metal is obtained; classifying the ore to obtain the first leaching unit in the step (1) and the second leaching unit in the step (2); the classification includes acid consumption classification or leaching stage classification. According to the method, the pH of the solution and in-pile deposition of impurity ions are regulated and controlled through solution scheduling of different leaching units in the heap leaching process, the content and acidity of the impurity ions in the leachate ...

Biological stirring cobalt-dipping technique for concentrate containing cobalt and sulfur

A PROCESS FOR INITIATION OF COPPER SULFIDE HEAP BIOLEACHING USING WATER IRRIGATION

Disclosed is a method for starting water spraying in copper sulphide ore heap bioleaching, comprising the following steps: 1) judging the feasibility of starting copper sulphide ore water spraying: if the acid production potential of the ore is greater than the acid consumption potential, water spraying is started; and 2) starting the water praying: moisturising is performed with water in the heap construction process of the copper sulphide ore, and after the completion of the heap construction, spraying is performed with water, when the pH value of a leach liquor > 3.0, circulating spraying is performed, and when the pH value of the leach liquor is < 3.0, acidophilus iron and sulphur oxidation microorganisms are inoculated in the leach liquor as a spraying liquor, and circulating spraying is continued, to gradually increase the concentrations of acid, iron and copper in the system solution, so that the starting of the copper sulphide ore heap bioleaching is achieved.

Pressured column soaks test device

The utility model relates to a pressured column soaks test device. The utility model discloses a leach post and pressurization system, leach the post and constitute by the three -layer cylinder, be respectively water bath layer (8) and outer heat preservation (9) of soaking the ore pillar body (7), intermediate level of inlayer, pressurization system includes and soaks the ore pillar body (7) internal diameter matched with exert pressure set (1), the dish of exerting pressure links to each other with airtight cylinder (3) through push rod (2), airtight cylinder (3) connect gradually adjustable barometer (4) and air compressor machine (6), the fixed pressure detector that sets up in set (1) of exerting pressure, the pressure detector is connected in pressure indication device (5). The utility model discloses a pressured column soaks test device can simulate in the industry dump leaching not co -altitude, the pressure that the ore bore in the difference stage of leaching to and the change ...

Biological stirring cobalt-dipping technique for concentrate containing cobalt and sulfur

The invention relates to a biological mixing cobalt leaching novel technique for cobaltiferous sulfide ore concentrates. Cobalt sulphate which can be sold in the market are produced after procedures of fine grinding, washing and reagent removal, conditioning, biological mixing and leaching, solid-liquid separation, iron removal, cobalt precipitation and so on of the cobaltiferous sulfide ore concentrates. During the leaching process, the temperature of 40 to 55 DEG C, the PH value of 1.2 to 1.8 and certain ferrum concentration (1 to 15 grams per liter) in a system are needed to maintain in order to keep high activity of bacteria. The invention has the advantages of capability of fully utilizing mineral resources, improvement of comprehensive utilization level of mines, conservation of cost and improvement of profit, and is particularly suitable for development of cobaltiferous sulfide ore resources in remote areas.

适用于生物堆浸提取金属的造粒工艺

A granulating technology suitable for biologic extraction of metal includes mixing the powdered ore of metallic sulfide with adhesive, granulating by 5-25 mm for granularity, and natural drying by covering with air-permeable object. Its advantages are enough strength and high penetrability of their stack.

Method for processing high-arsenic and high-alkali wastewater

The invention relates to a method for processing arsenic-containing wastewater, in particular to a method for processing high-arsenic and high-alkali wastewater. The method comprises the following steps of: (1) adding ferrous sulphate into the arsenic-containing wastewater until the color of a reaction liquid is turned into red brown from green under the condition of aeration; (2) adding an oxidant into the reaction liquid under the condition of aeration, standing after the reaction is completed, and performing liquid-solid separation; (3) adding polymer ferric sulfate into a clear liquid obtained through the liquid-solid separation in the step (2) under the condition of aeration; (4) determining a pH value of a solution and controlling an ending pH to be between 6 and 7; and (5) standing after keeping aeration for 3 to 5 hours, submitting a supernatant to test, discharging, and sending residues into tailings. The method has the advantages of short processing flow, simple equipment, small ...

耐酸诱变浸矿菌种的选育方法

A process for selectively culturing the acid-resistant induced bacterial strain used for immersion extraction of metallic ore includes taking the mixture of ferrous oxide thiobacteria and ferrous oxide microspirilla from acidic water in mining pit, separating, culturing, adding the powdered ore to be extracted to 6-9 k non-iron culture medium, naturalizing culture, radiating induction by He-Ne laser, screening at low pH value, activating, adaptive naturalizing, and culturing. Its advantages are high extracting speed and output rate, and low cost.

Method for carrying out oxidation leaching on ores by using sodium carbonate and quicklime

The invention relates to an ore leaching technique, in particular to a method for carrying out oxidation leaching on ores by using sodium carbonate and quicklime, which comprises the following steps: 1. preparing 63-66 wt% of sodium carbonate and 34-37 wt% of quicklime; 2. mixing the sodium carbonate and the quicklime, which are proportioned in the step 1, with ores and a proper amount of water, and reacting to leach out the object element; and 3. carrying out solid-liquid separation on the slurry obtained in the step 2 to obtain a solution containing the object element, thereby obtaining the object element product. Compared with the technical process, which is implemented by preparing sodium hydroxide from sodium carbonate and quicklime by a causticization process and carrying out leaching reaction by using the sodium hydroxide, the method provided by the invention has the advantages of high conversion rate of raw materials, short production process, low facility request and the like.

Positive flotation method of low grade refractory phosphate ores

The invention relates to a positive flotation method of low grade refractory phosphate ores. The method comprises the following specific steps: 1. crushing and grinding ores: grinding raw ore according to the grinding density of 1:1 to -0.074mm of 55-60% tailings discarding fineness; 2. performing positive flotation: firstly, roughing, namely adding depressant sodium carbonate, big modulus sodiumsilicate and collector ZJ oleic acid composite, stirring to obtain roughing concentrate, roughing middlings and roughing tailings; secondly, concentrating, namely adding big modulus sodium silicate in the roughing concentrate to perform 3-4 times of concentrations and obtain concentrating middlings and phosphorus product concentrate; thirdly, scavenging, namely adding ZJ oleic acid composite in the roughing tailings to perform 2-3 times of scavengings and obtain scavenging middlings and tailings; and 3. regrinding and reprocessing, namely further dissociating ores, and reprocessing to obtain tailings ...

Method for comprehensively utilizing laterite-type nickel ore

The invention relates to a process for comprehensively utilizing laterite-type nickel ore, which comprises the sequential steps of: conducting dump leaching and depositing to low-grade laterite-type nickel ore on one hand to produce nickel sulfide and cobalt sulfide after selective mining/ore dressing, on the other hand conducting pyro-smelting to high-grade laterite-type nickel ore, and obtainingferronickel after pre-reduction roasting, furnace smelting and refining. The process preferentially combines the technologies of dump leaching and pyro-smelting and is characterized by low comprehensive production cost, high resource utilization rate, easy operation, less investment, small energy consumption, fast effect and the like.

Extraction technology of alumina and potassium sulfate from alunite by using hot-pressing leaching process

Process for extracting gold from low-grade difficultly-treatable gold ore containing arsenic and carbon

The invention relates to a process for extracting gold from low-grade difficultly-treatable gold ore containing arsenic and carbon. The process is characterized in that: the gold ore has the characteristics of high clay mineral content, large fine ore amount after grinding, and the like. The process comprises the following steps of: grinding raw ore to 10 to -30 millimeters; sieving ore through a sample sieve of 1 to -2 millimeters or washing the ore with water so as to separate fine ore from the ore; floating gold concentrate by using the obtained fine ore; performing direct heap leaching on ore of +2 millimeter and performing biological oxidation; performing medium transformation such as acid washing, water washing, alkali washing and the like on the biologically-oxidized ore and cyaniding directly so as to extract gold, wherein gold is extracted from the floated gold concentrate by biological oxidation-cyaniding and carbon soaking-pressure oxidation-cyaniding and gold extraction or baking ...

耐酸诱变菌及其用于精矿的浸出工艺

An acid-resistant mutagenic bacterium, Thiobacillus ferrooxidans Retech III. (CCTCC No.M200033), is a mixture of Thiobacillus ferrooxidan, Thiobacillus sulfuroxidan and microspirillum ferrooxidan. Animmersion extracting technology with said mutagenic bacteria for ore concentrating includes naturalizing the bacteria, enlarged culture, grinding ore concentrating, adding acid regulating slurry, adding said bacteria, recovering metal from liquid extract, and regenerating the bacteria. Its advantages are short period, high extraction rate and low cost.

Method for comprehensively utilizing laterite-type nickel ore

The invention relates to a process for comprehensively utilizing laterite-type nickel ore, which comprises the sequential steps of: conducting dump leaching and depositing to low-grade laterite-type nickel ore on one hand to produce nickel sulfide and cobalt sulfide after selective mining/ore dressing, on the other hand conducting pyro-smelting to high-grade laterite-type nickel ore, and obtaining ferronickel after pre-reduction roasting, furnace smelting and refining. The process preferentially combines the technologies of dump leaching and pyro-smelting and is characterized by low comprehensive production cost, high resource utilization rate, easy operation, less investment, small energy consumption, fast effect and the like.

Método de biolixiviación en dos etapas de mineral de sulfuro de cobre.

MÉTODO DE DOS ETAPAS PARA LA BIOLIXIVIACION DE MINERALES DE SULFUROS DE COBRE SECUNDARIOS, QUE COMPRENDE: A) LOS MINERALES DE SULFUROS DE COBRE SECUNDARIOS TRITURADOS SON TRANSPORTADOS A LAS PILAS DE LIXIVIACION PARA LA LIXIVIACIÓN DE PRIMERA ETAPA Y SE LIXIVIAN HASTA QUE LA ELEVACIÓN SUPERIOR LOGRA UNA RECUPERACIÓN DE COBRE DE 40%-50%, LA CONCENTRACIÓN DE ÁCIDO SULFÚRICO EN LA SOLUCIÓN DE IRRIGACION ES = 20 g/L Y LA CONCENTRACIÓN DE HIERRO FÉRRICO ES = 15 g/L; B) LA LIXIVIACIÓN DE SEGUNDA ETAPA DE LOS MINERALES SE LLEVA A CABO SOBRE LA BASE DE LA LIXIVIACION DE PRIMERA ETAPA, EL VALOR DEL PH EN LA SOLUCIÓN DE IRRIGACIÓN ESTÉ EN EL RANGO DE 1,2-1,5, LO QUE PODRÍA REDUCIR LA TASA DE IRRIGACION CUANDO LA TEMPERATURA DEL LIXIVIADO ES INFERIOR A 45°C; C) EL LIXIVIADO MIXTO DE LA PRIMERA Y SEGUNDA ETAPA SE ENVÍA AL PROCESO DE LA EXTRACCIÓN DE SOLVENTES Y ELECTRO-OBTENCIÓN, QUE PODRÍA OBTENER EL CÁTODO DE COBRE.

Selective heap leaching gold extraction process for gold mine containing copper

The invention discloses a selective heap leaching gold extraction process for gold mine containing copper, belonging to the field of hydrometallurgy. The process comprises the steps of: smashing and heaping gold mine containing copper; carrying out alkali treatment on the mine; then adding ammonium salt and sodium cyanide according to a certain proportion to realize the selective leaching of the gold and the restriction to the leaching of the copper; and finally absorbing and extracting the gold from leaching solution by conventional active carbon. The invention has the advantages of simple process method, short procedure, simple equipment, easy implementation, high gold leaching efficiency, low consumption of sodium cyanide, low energy consumption, little investment and low cost, and is the gold extraction method with easy realization of industrialized production and favorable economical benefit.

Refractory gold concentrate biological oxidizing slag cyaniding and gold-extracting method

The invention relates o a refractory gold concentrate biological oxidizing slag cyaniding and gold-extracting method, which is characterized in that: a washed oxidizing slag cyanidation carbon-in-pulp leaching method is that: the slag subjected to primary cyanidation carbon-in-pulp leaching is re-ground and subjected to secondary cyanidation carbon-in-pulp leaching, and the grinding and the leaching are carried out simultaneously, or a film-prevention reagent is added during cyanidation carbon-in-pulp leaching. A complicated reagent removal flow is not needed in the process of floating the gold concentrate, and the gold concentrate can be directly subjected to biological oxidation. By the method, the gold leaching rate is greatly improved on the basis of the primary cyanidation carbon-in-pulp leaching, the cost of removing reagents in the process of floating the gold concentrate is saved, the leaching rate of the process is improved to 96-98 percent from 82-85 percent of the traditional ...

Comprehensive treatment method of three wastes in extracting vanadium from stone coal navajoite

The invention relates to a comprehensive treatment method of three wastes in extracting vanadium from stone coal navajoite. The method comprises the following steps: roasting and producing calcine and SO2-contained waste gas; generating ammonium sulphate by ammonia absorption and oxidation; leaching to obtain leached liquid; filtering and separating leached dregs to be used as produce cement; obtaining absorption tail liquid and stripping liquid by ion exchange treatment; neutralizing part of absorption tail liquid; returning to the leaching step; neutralizing the remaining absorption tail liquid with lime to achieve an emission standard; precipitating vanadium in ammonium salt to adjust a pH value of the stripping liquid; adding ammonium sulphate to stir and precipitate ammonium metavanadate and ammonia-nitrogen wastewater; rectifying the ammonia-nitrogen wastewater to obtain a sodium sulfate solution and ammonia; cooling the sodium sulfate solution to separate a byproduct of sodium sulfate ...

Combined heap leaching process for copper ore

The invention relates to a combined heap leaching process for copper ore, wherein a high ferro thin sulphuric acid solution containing Thiobacillus ferrooxidans Retech III specific ore leaching bacterium (already preserved in the National Typical Culture Preservation Center, preservation registration number CCTCC No.M200033) is used to leach out cupric sulfide ores, and thin sulfide solution obtained thereby is employed to spray or drench the copper oxide ore.

Heap-leaching based biological pre-oxidation method for refractory gold ore

The invention belongs to the field of hydrometallurgy, and particularly relates to a heap-leaching based biological pre-oxidation method for refractory gold ore. The heap-leaching based biological pre-oxidation method for refractory gold ore comprises the following steps: (1) breaking raw ore into pieces, heaping the broken ore, spray-leaching the heaped low-grade refractory gold ore, and controlling the temperature of a leachate to be above 45 DEG C; (2) neutralizing the leachate to increase the pH value thereof to 1.5-1.9 if the pH value of the leachate is lower than 1.5; (3) feeding the neutralized leachate into a biological fixed bed, oxidizing ferrous iron into ferric iron with acidophilic bacteria adsorbed by the biological fixed bed, and obtaining a high-potential oxidation solution after the oxidation-reduction potential of a solution is more than 850mV; and (4) spaying the high-potential oxidation solution obtained in the step (3) onto the low-grade refractory gold ore circularly ...

Zn-containing cyanide barren solution three-step sedimentation processing technology

The invention relates to a three-step sedimentation processing technology of a cyanidation barren solution containing zinc, wherein, a dezincification reaction sedimentation procedure is added between acidification reaction sedimentation and neutralization reaction sedimentation, namely, lime is firstly added to a clear solution reaction tank containing one-step deposited clear solution for carrying out the dezincification reaction and the pH value is adjusted to be 5.50 to 6.50, and then the clear solution added with the lime is deposited in a sedimentation tank so as to ensure that Zn<2+> in the solution is deposited in the forms of Zn(CN) 2 and Zn(OH)2, and then solid-liquid separation is carried out. Sediment and cyanidation tailings are processed together and the solution is subsequently processed. The technology of the invention is characterized by high removal rates of Cu, Fe and Zn, low processing costs, small investment, simple technology and the like; since the processed cyanide ...

Extraction technology of alumina and potassium sulfate from alunite by using hot-pressing leaching process

The invention discloses an extraction technology of alumina and potassium sulfate from alunite by using a hot-pressing leaching process, comprising the following steps: mixing the alunite with a potassium hydroxide solution to prepare pulp; transferring the pulp into a hot-pressing system, carrying out hot-pressing leaching at 100-300 DEG C, cooling the obtained leaching solution, and carrying out solid-liquid separation; transferring the leaching solution after solid-liquid separation into a desiliconization system for desiliconizing at 80-200 DEG C, and filtering and separating to obtain a desiliconized extracting solution and silica slag; transferring the desiliconized extracting solution into an acid regulating system, keeping adding sulfuric acid to the acid regulating system while stirring until white precipitate in the desiliconized extracting solution is not generated any more and disappears, and then filtering and separating out a solution mainly containing the potassium sulfate ...

Method for controlling oxidation-reduction potential in biological heap leaching process

The invention relates to a method for controlling oxidation-reduction potential in the biological heap leaching process. The method is as follows: in the biological heap leaching process of biological metallurgy, the temperature of leachate and the total concentration of sulfate are regulated to realize reasonable matching, thus the advantages of desulfurizing bacteria in heap can be realized, the activity of iron-oxidizing bacteria can be inhibited, the oxidation-reduction potential of leachate can be controlled, the dissolution of pyrite can be inhibited fundamentally without affecting the leaching of copper minerals, and the outputs of acid and iron can be reduced. The method of the invention is suitable for the biological heap leaching process of copper sulfide ore with high sulphur-copper ratio and low acid-consuming gangue; the selective leaching of copper sulfide ore is realized, the surplus acid and iron in the system are controlled, the leaching period is shortened and the processing ...

Positive flotation method of low grade refractory phosphate ores

Selective copper removing method for high-copper gold loaded carbon

The invention relates to a selective copper removing method for high-copper gold loaded carbon, which is to selectively remove copper from high-copper gold loaded carbon by adding one or several of hydrogen peroxide, potassium permanganate, sodium chlorate and sodium hypochlorite as an additive and recover the copper from copper removing liquid by an extraction or neutralization method. The method has the advantages that: the process flow is short, the medicament dosage is small, and the treatment time is short; the copper removal rate is high (over 90 percent), and gold is not extracted basically; the process for recovering copper from the copper removing liquid is simple, and the copper removing liquid can be recycled after the copper is recovered; and calcium-magnesium precipitates and the like on the surface of the gold loaded carbon can be removed.

金属硫化矿尾矿的回收工艺

A process for recovering the tailings of metal sulfide ore includes high-efficiency floatation to obtain concentrate, granulating, curing, stacking, showering acidic water drips of impregnating microns and recovering the impregnated liquid to obtain target motal. Its advantages are high recovery rate, and improving environment of mine.

Selective bioleaching process of high-sulphur/copper ratio secondary copper sulphide ore

The invention relates to a selective bioleaching process of a high-sulphur/copper ratio secondary copper sulphide ore. In the process, microorganisms are utilized to leach the high-S/Cu ratio low-grade secondary copper sulphide ore, and the oxidation-reduction potential in the leaching process is controlled through the measures of regulating the pH, the dripping intensity, the fallow system, the air permeability, the breeding of dominant species, and the like so as to realize the selective leaching of the secondary copper sulphide ore. The process has short flow, simple equipment, low investment, low cost, no pollution, high recovery rate and adjustable production scale, can treat low-grade copper ore resources which cannot be treated by using the traditional selecting and smelting process, the resource utilization range is enlarged, and the comprehensive recovery level of copper metal is improved.

微细粒稀有金属氧化矿回收工艺

A process for recovering the superfine particles of rare metal oxide ore includes using water stream separator to remove micro mud particles less than 10 microns, adding amine mixture to remove floating stone, and floatation of useful ore by adding salicylhydroxy oximic acid, tributyl phosphate and oil No.2. Its advantage is high recovery rate.

Heavy liquid discarding tailings processing for improving processing capacity of lead-zinc concentrator

Disclosed is a heavy liquid tailings discarding technics for the lead-zinc concentrator to improve the processing capacity, comprising the steps as follows: 1) according to the density of all kinds of minerals, in particular to the difference between the valuable metals and the waste rock, select the heavy liquid with a specific density between the light mineral and the heavy mineral; 2) crush the processed ores and make the particle size between 0 and 16mm; 3) put the processing ores in the heavy liquid with different specific density; 4) in an experiment of some specific density, take out the ores floated on the surface of the heavy liquid, and filter out the heavy liquid; take out the ores sunk to the bottom of the heavy liquid, and filter out the heavy liquid; 5) analyze the weight of the ores that the density is less and more than the specific density of the heavy liquid and the content of the valuable metals; 6) discard tailings by using the best specific density selected according ...

Selective heap leaching gold extraction process for gold mine containing copper

The invention discloses a selective heap leaching gold extraction process for gold mine containing copper, belonging to the field of hydrometallurgy. The process comprises the steps of: smashing and heaping gold mine containing copper; carrying out alkali treatment on the mine; then adding ammonium salt and sodium cyanide according to a certain proportion to realize the selective leaching of the gold and the restriction to the leaching of the copper; and finally absorbing and extracting the gold from leaching solution by conventional active carbon. The invention has the advantages of simple process method, short procedure, simple equipment, easy implementation, high gold leaching efficiency, low consumption of sodium cyanide, low energy consumption, little investment and low cost, and is the gold extraction method with easy realization of industrialized production and favorable economical benefit.

Chloridizing roasting method of material containing alunite

The invention relates to a chloridizing roasting method of a material containing alunite, which is mainly used for comprehensively utilizing the alunite or tailing containing the alunite. The method adopts chloride as an additive for roasting dehydration of the alunite or the tailing containing the alunite; under the condition that dehydration rate is more than 90%, Al existing in the mode of Al2(SO4)3 in the alunite or the tailing containing the alunite volatilizes in the mode of AlCl3 and is enriched in a woven bag dust collector or a rotoclone collector, thus avoiding environment pollution by SO2 generated by decomposing the Al2(SO4)3; acid gas in smoke, such as HCl and the like, can be adsorbed by alkaline liquor or directly returned for roasting; clinker is leached by water; and leaching agent recovers K2SO4, and leaching slag recovers Al2O3 with a common leaching method. When being used for processing the alunite or the tailing containing the alunite, the method of the invention can ...

Pyrite selectivity inhibition technique for secondary copper sulfide mineral biological lixiviation process

The invention relates to a pyrite selective inhabitation technique for biological leaching process of secondary copper sulphide ores, wherein, a biological leaching system with low PH value and low electric potential is reached by utilization of leaching bacteria containing Thiobacillus ferrooxidans Retech III (T.F.R.III leaching bacteria for short) (has been collected in China Center for Type Culture Collection (in Wuhan University) and has a collection registration number of CCTCC No:M200033) and adoption of two spraying methods of phased intermission and continuity and reasonable matching of bacterial activity, PH value and other conditions, and high efficiency selective leaching of the copper sulphide ores is realized. Moreover, pyrites are inhibited effectively and yield of acids and irons is reduced. After extraction of qualified lixivium after leaching, aqueous phase goes back for heap leaching, and organic phase enters into stripping procedure for treatment. The invention has the ...

Wet method lixiviating method for copper-contained tailings

The invention discloses a wet method lixiviating method for copper-contained tailings, belonging to a tailing comprehensive utilization technical method. The method comprises the following steps of: firstly carrying out soda treatment on the copper-contained tailings, then adding ammonium salt with a certain concentration, respectively carrying out dump leaching and agitation leaching according to the thickness of the granularity of the copper-contained tailings to obtain lixivium having higher copper concentration, finally recovering metal copper with conventional extraction, electrowinning process or direct electrowinning, and returning an ammonium salt contained solution for lixiviating. The method has the advantages of simple process, short process, low energy consumption, no additional equipment, easy implementation, comprehensive recovery of copper resource, less investment and low production cost, and is a copper recovering method which is easy to realize industrial production and ...

Floating process for comprehensively recycling copper separation tailings

The invention relates to a mineral separation process for recycling tailings, in particular to a floating process for comprehensively recycling copper separation tailings. The process provided by the invention is advanced, all useful components in the copper separation tailings are efficiently utilized, an industrial raw material base of a mine can be enlarged, no-tailing discharge can be realized, and better social and economic benefits are obtained.

Zn-containing cyanide barren solution three-step sedimentation processing technology

The invention relates to a three-step sedimentation processing technology of a cyanidation barren solution containing zinc, wherein, a dezincification reaction sedimentation procedure is added between acidification reaction sedimentation and neutralization reaction sedimentation, namely, lime is firstly added to a clear solution reaction tank containing one-step deposited clear solution for carrying out the dezincification reaction and the pH value is adjusted to be 5.50 to 6.50, and then the clear solution added with the lime is deposited in a sedimentation tank so as to ensure that Zn<2+> in the solution is deposited in the forms of Zn(CN) 2 and Zn(OH)2, and then solid-liquid separation is carried out. Sediment and cyanidation tailings are processed together and the solution is subsequently processed. The technology of the invention is characterized by high removal rates of Cu, Fe and Zn, low processing costs, small investment, simple technology and the like; since the processed cyanide ...

Gold extraction process of gold concentrate with high carbon, arsenic and sulfur

The invention relates to a gold extraction process of a gold concentrate with high carbon, arsenic and sulfur, which comprises the five steps of ore grinding classification, biological oxidation, pressure oxidation, solid-liquid separation and cyaniding gold extraction and belongs to biological and wet metallurgy process. The process comprises the steps of: oxidizing the sulfide part wrapping thegold by using a biological oxidation process, completely oxidizing the sulfide wrapped gold by using a pressure oxidation process and finally carrying out gold extraction by using a cyanided carbon slurry or zinc powder substitution method. By adopting the process, the gold concentrate with high carbon, arsenic and sulfur can be treated; the leaching rate of the gold is increased from 82-85% during the biological oxidation-cyaniding gold extraction to 98-99%; the gold in the tailings is decreased from 10-13g/t to 0.5-0.8g/t; the consumption of the sodium cyanide is reduced from 7-20kg/t gold concentrate ...

Pyrite selectivity inhibition technique for secondary copper sulfide mineral biological lixiviation process

The invention relates to a pyrite selective inhabitation technique for biological leaching process of secondary copper sulphide ores, wherein, a biological leaching system with low PH value and low electric potential is reached by utilization of leaching bacteria containing Thiobacillus ferrooxidans Retech III (T.F.R.III leaching bacteria for short) (has been collected in China Center for Type Culture Collection (in Wuhan University) and has a collection registration number of CCTCC No:M200033) and adoption of two spraying methods of phased intermission and continuity and reasonable matching of bacterial activity, PH value and other conditions, and high efficiency selective leaching of the copper sulphide ores is realized. Moreover, pyrites are inhibited effectively and yield of acids andirons is reduced. After extraction of qualified lixivium after leaching, aqueous phase goes back for heap leaching, and organic phase enters into stripping procedure for treatment. The invention has the ...

含碱性脉石的硫化矿矿石或精矿或尾矿的生物浸出工艺

A biological extracting technology for the ore or ore comcentrate or tailings of sulfide containing alkaline vein rock includes separating and culturing the bacterial mixture of thiobacillus ferrooxidan and microspirillum ferrooxidan in 9K culture medium, naturalizing culture in the water in which said ore to be extracted and pyrite ore or sulfur are immersed, enlarge culture, mixing the ore tobeextracted with pyrite ore and sulfur powder, stacking, and showing the bacteria contained high-Fe liquid for extracting metal. Its advantages are short period, high extracting speed and rate, and lowcost.

Middle thermophilic bacteria and chemical and biological combined heap leaching technique for low-grade primary copper ore

Biological extract technology for ore of cobalt nickel oxide

Mesophilic acidophilic bacteria and biological heap leaching technique for low-grade cobalt-containing sulfur concentrate

The invention relates to mesophilic acidophilic bacteria and a biological heap leaching technology for low-grade cobaltiferous sulfide ore concentrates. The mesophilic acidophilic bacteria have a name of Thiobacillus ferrooxidans Retech V and a collection registration number of CCTCC NO: M202039, and has been stored and collected in China Center for Type Culture Collection (in Wuhan University). The biological heap leaching technology is that: mineral grains which are suitable for biological heap leaching are obtained after coating of crushed stones and solidification of the mineral grains of the low-grade cobaltiferous sulfur-bearing ore concentrates. Cobalt sulphates are obtained through procedures of embankment, heap leaching and trickling by adoption of bacteria with two different growth temperatures, lixivium circulation, purification and deferrization of cobalt pregnant solution, cobalt settlement and so on of the mineral grains. The temperature of 10 to 55 DEG C, the PH value of ...

生物冶金过程的酸平衡方法

An acid balance method for biometallurgy features that calcium carbonate, calcium oxide and calcium hydroxide are used to neutralize pH<1.5 residual extracting liquid and the acid dialyser with anionic exchange membrane is used to treat the recoved acid. Its advantages are high effect, optimal growth and reproduction of bacteria, short period, high metal recovery rate, and low cost.

Selective bioleaching process of high-sulphur/copper ratio secondary copper sulphide ore

The invention relates to a selective bioleaching process of a high-sulphur/copper ratio secondary copper sulphide ore. In the process, microorganisms are utilized to leach the high-S/Cu ratio low-grade secondary copper sulphide ore, and the oxidation-reduction potential in the leaching process is controlled through the measures of regulating the pH, the dripping intensity, the fallow system, the air permeability, the breeding of dominant species, and the like so as to realize the selective leaching of the secondary copper sulphide ore. The process has short flow, simple equipment, low investment, low cost, no pollution, high recovery rate and adjustable production scale, can treat low-grade copper ore resources which cannot be treated by using the traditional selecting and smelting process, the resource utilization range is enlarged, and the comprehensive recovery level of copper metal is improved.

耐酸诱变菌及其用于矿石的堆浸工艺

An acid-resistant mutagenic bacterium, Thiobacillus ferrooxidans Retech III (CCTCC No.M200033), is the mixture of Thiobacillus ferrooxidan, Thiobacillus sulfuroxidan and Microspirillum ferrooxidan. Astack extraction process with it for ore includes naturalizing said mutagenic bacteria, amplifying culture, stacking ore, showerting the liquid containing them, and recovering metal from the liquid extract. Its advantages are short period, high extraction rate and low cost.

Two-stage biological dump leaching method of secondary copper sulphide ore

The invention relates to the field of hydrometallurgy and particularly relates to a two-stage biological dump leaching method of secondary copper sulphide ore. The method includes following steps: 1) transporting crushed secondary copper sulphide ore to a yard, constructing a heap and carrying out a first-stage leaching process until 40-50% of copper is leached from the last layer of the ore, wherein concentration of sulfuric acid in a spray liquid is not less than 20g/L and concentration of Fe<3+> is not less than 15g/L; 2) performing a second-stage leaching process to the secondary copper sulphide ore, which is subjected to the first-stage leaching process, with a spray liquid being 1.2-1.5 in pH value, and reducing spray intensity when temperature of a leaching solution is less than 45 DEG C; and 3) mixing a first-stage leaching solution and a second-stage leaching solution, successively performing an extraction process, a reverse-extraction process and an electrodeposition process to ...

Treatment process of copper-iron-contained high-concentration acidic mine wastewater

The invention relates to a treatment process of copper-iron-contained high-concentration acidic mine wastewater. The treatment process comprises the following sequential process steps: (1) neutralization to remove iron; (2) solid-liquid separation; (3) biological sulfuration; (4) solid-liquid separation; and (5) biological purification for recovering valuable constituents in the wastewater and enabling yielding water to achieve an emission standard. The invention has the advantages of high removal rate of copper, iron and sulfate radicals, strong suitability, low treatment cost, environmentalprotection, good comprehensive recovery utilization effect, and the like and is particularly suitable for treating the copper-iron-contained high-concentration acidic mine wastewater generated in thecopper-extracting production process by a biological wet method and in the mining process of copper sulphide.

Method for inhibiting generation of mine acid wastewater from source

The invention discloses a method for inhibiting generation of acid mine wastewater from the source, which comprises the following steps: adding a substance containing monovalent cations into waste rocks of a mine, and controlling the pH value of the reaction to be 1-2.5 by using a pH regulating agent. According to the method, in the reaction pH range of 1-2.5, monovalent cations react with high iron ions and sulfate ions generated by oxidation of the pyrite in the waste rock to generate the iron vitriol precipitate, the generated iron vitriol precipitate is adsorbed to the surfaces of the oxidized pyrite and the unoxidized pyrite to form a compact protective film, further oxidation of the pyrite can be inhibited, and the effect of the pyrite is improved. And the purpose of inhibiting the generation of acidic wastewater from the source is achieved.

Mesophilic acidophilic bacteria and biological heap leaching technique for low-grade cobalt-containing sulfur concentrate

The invention relates to mesophilic acidophilic bacteria and a biological heap leaching technology for low-grade cobaltiferous sulfide ore concentrates. The mesophilic acidophilic bacteria have a name of Thiobacillus ferrooxidans Retech V and a collection registration number of CCTCC NO: M202039, and has been stored and collected in China Center for Type Culture Collection (in Wuhan University). The biological heap leaching technology is that: mineral grains which are suitable for biological heap leaching are obtained after coating of crushed stones and solidification of the mineral grains ofthe low-grade cobaltiferous sulfur-bearing ore concentrates. Cobalt sulphates are obtained through procedures of embankment, heap leaching and trickling by adoption of bacteria with two different growth temperatures, lixivium circulation, purification and deferrization of cobalt pregnant solution, cobalt settlement and so on of the mineral grains. The temperature of 10 to 55 DEG C, the PH value of 1.2 ...

Method utilizing generation of ferrous sulfate for realizing iron balance in biological metallurgy process

The invention relates to a method utilizing the generation of ferrous sulfate for realizing iron balance in the biological metallurgy process. The method comprises the following steps: in the copper sulfide ore biological heap leaching process with surplus acid and iron, the temperature in the heap, the pH value of leachate, the iron concentration and other parameters are regulated to realize reasonable matching, ferrous sulfate type materials are generated in the heap to realize iron balance; and calcium carbonate (limestone) is used to neutrcalize the free acid in faffinate, thus the pH value of leachate can be maintained in the pH value range for the generation of ferrous sulfate and iron balance in the biological heap leaching process can be realized. The method of the invention is suitable for the biological heap leaching process of copper sulfide ore with low copper-sulphur ratio, high pyrite content and low acid-consuming gangue, and can solve the problem of surplus acid and iron ...

生物冶金过程中加硫的酸平衡方法

An acid balance method by adding sulfur in biometallurgy features that in biological immersing extraction procedure of biometallurgy, the ore or concentrate of pyrite or sulfur, which can be oxidizedinto acid by extracting microbes, is mixed with the ore, concentrate, or tailings to be extracted. Its advantages are no need of supplementing sulfuric acid, optimal growth and reproduction of bacteria, low cost, and high extraction rate.

Biological heap leaching process for cobaltous nickelous sulfide ore containing arsenic

The invention relates to a biological heap leaching process for cobaltous nickelous sulfide ore containing arsenic, wherein dilute sulfuric acid solution containing specific ore immersing microorganisms and Fe3+ ions is employed to leach out cobalt ore containing nickel sulfide, and iron removal is carried out to the nickel and cobalt containing leach solution, the nickel and cobalt mixture product is obtained through settling nickel and cobalt to the purification liquid.

Wet method lixiviating method for copper-contained tailings

The invention discloses a wet method lixiviating method for copper-contained tailings, belonging to a tailing comprehensive utilization technical method. The method comprises the following steps of: firstly carrying out soda treatment on the copper-contained tailings, then adding ammonium salt with a certain concentration, respectively carrying out dump leaching and agitation leaching according to the thickness of the granularity of the copper-contained tailings to obtain lixivium having higher copper concentration, finally recovering metal copper with conventional extraction, electrowinning process or direct electrowinning, and returning an ammonium salt contained solution for lixiviating. The method has the advantages of simple process, short process, low energy consumption, no additional equipment, easy implementation, comprehensive recovery of copper resource, less investment and low production cost, and is a copper recovering method which is easy to realize industrial production and ...

Recovery method of molybdenum concentrates

The invention discloses a recovery method of molybdenum concentrates. The method comprises the following steps of: carrying out a hot pressing natural reaction of materials to be processed under an alkaline condition; enriching molybdenite through flotation from natural oxide slag after natural leaching, returning for hot pressing oxidation and floating tailing slag to recover copper; producing high-purity ammonium molybdate and ammonium perrhenate from leached liquid after the natural leaching through the process of extraction, purification, acid precipitation, ammonia dissolution, concentration and crystallization; and removing sodium sulfate by evaporating or freezing and crystallizing raffinate to produce a sodium sulfate product. According to the invention, the recovery rate of the molybdenum concentrates is improved.

Ore combined leaching method

The invention relates to an ore combined leaching method which comprises the following steps: (1) carrying out biological heap leaching treatment on first ore by using a spraying liquid, and carrying out agitation leaching treatment on the obtained leaching liquid and second ore to obtain a leaching liquid containing target metal; (2) extracting the leaching liquid containing the target metal obtained in the step (1) to obtain the target metal and tail liquid; the obtained tail liquid is used as spraying liquid to be recycled in the step (1); classifying the ores to obtain the first ores and the second ores in the step (1); the classification comprises any one of grade classification, mineral classification or permeability classification. According to the method, ores with different grades, different types or different properties are treated respectively, so that efficient and economical leaching of various ores is realized; a high-potential acidic ferric iron solution is provided for agitation ...