Method for improving gold loaded carbon grade in gold-leaching process by carbon-in-pulp process
(A) technical field The invention relates to a process for improving Carbonitride gold-leaching process by carbon-loaded carbon grade in the method. (B) background art In our most Carbonitride gold extracting production, is to utilize the activated carbon adsorption jin Qing complex, then the desorbed method of extracting gold. Therefore if the loaded carbon-grade low, will make the desorption pressure is increased, the production cost is increased. Therefore how to improve desorption carries Jin Tan -grade, is to adopt the Carbonitride carbon pulp process the gold extraction enterprises generally concerns. (C) the content of the invention The purpose of this invention is to provide a process for improving Carbonitride gold-leaching process by carbon-loaded carbon grade in the method, the grade of jin Tanattracts carries raise and understand, the labor intensity can be reduced also at the same time, reducing the production cost. The technical proposal adopted by this invention are as follows: A kind of improved Carbonitride gold-leaching process by carbon-loaded carbon grade in the method, control 43-46% adsorption pulp concentration, by adding activated carbon to absorb, the time interval raises the coal 5-7 days, adsorption tank bottom coal density is 15-20g/t pulp. The ore slurry concentration control is in 43-46%, in order to ensure the creation of the conditions for the adsorption rate of the activated carbon. Conventional all Carbonitride carbon pulp process activated carbon adsorption operation is once raises the coal of each class, each time each class by the gold of the gold plated plaques, the adsorption operation, read 5-7 day after the coal, say a time, by reducing the cycle number of the activated carbon, the moving speed of the activated carbon is reduced, to achieve the purpose of improving the grade carries Jin Tan. Specific raises the coal time interval according to the height of the loaded carbon grade of grade and discharge tail liquid, not exceeding the discharge tail liquid grade 0.01g/cm3. In order to ensure that the adsorption rate, is in not raises the coal , taken to increase the density of bottom coal measures the time, at the same time reducing the number of combined time and string coal , the slurry can be effectively reduced, the short circuit phenomenon, enhancing the stability of the flow. Better, in accordance with the density of the low front straightening after bottom coal high-gradient distribution is provided, this way, the activated carbon of the adsorption groove is low-grade, low-grade carries Jin Tan changed in the past, desorption pressure is large, the production cost is large. The present invention is preferably 6-8 a series of blanking adsorption. Furthermore, the air supply of the various relevant 30-60m3/h, in addition to the smooth flow trough pulp , that the spill groove layers does not occur, the activated carbon also can avoid the phenomenon of the cylindrical screen and the sunken, the adsorption groove to the activated carbon is uniformly distributed, is conducive to improving the absorption rate. Furthermore, because the distribution of the adsorption carries Jin Tan the upper part of the groove is low-grade, the higher the grade of the part down, therefore, in the desorption treatment by to carries Jin Tan , the lower part of the first should be as far as possible in order to guarantee the proposed by carries Jin Tancarries Jin Tan of the grade. Because the traditional raises the coal times of the method of operation of multiple, active carbon cycle speed is fast, the acid regeneration of the desorption time is short. After adopting the method of this invention, to reduce the lifting, of times string coal , corresponding should be extended analytical carbon of the acid regeneration time, the activated carbon adsorption element can fully dissolve the inorganic matter, inorganic matter to the activated carbon adsorption rate to eliminate the impact of the element, so as not to affect the circulation of the activated carbon. The invention relative to the prior art, has the following advantages: After using the method according to the invention, in that on the premise of activated carbon adsorption rate, before the improvement of the grade is improved from carries Jin Tan 2500g/t reaching 6000g/t left and right, the 1.5 times, due to the reduced number of raises the string coal , reduces the labor intensity of workers, activated carbon consumption, reduce the production cost of the enterprise. The concrete mode of execution of (four): The following specific examples to illustrate the technical scheme of the invention, the scope of protection of the present invention, however, is not limited to this: Embodiment 1 Preparation adsorption tank for adsorbing the carbon pulp concentration of 44%, by adding activated carbon to the operation of adsorption, 7 a series of blanking adsorption, the air volume before the two relevant 58.8m3/h, the rest of the time the same air volume, is 32.5 m3/h; bottom coal density of the various relevant 15g/t; every 5 days once raises the coal , the average grade carries Jin Tan 4300g/t. Embodiment 2 Preparation adsorption tank for adsorbing the carbon pulp concentration of 45%, by adding activated carbon to the operation of adsorption, 7 a series of blanking adsorption, the air volume before the two relevant 50m3/h, the remaining several relevant the same air volume, is 45.5 m3/h; front two adsorption channel 1 #, density is bottom coal 2 # 15g/t, 3 #, the 4 # 17g/t, 5 #, 6 #, to 7 # 20g/t; every 7 days a raises the coal , the average grade carries Jin Tan 5300g/t. Embodiment 3 Preparation adsorption tank for adsorbing the carbon pulp concentration of 46%, by adding activated carbon to the operation of adsorption, 7 a series of blanking adsorption, the air volume before the two relevant 40m3/h, the remaining several relevant the same air volume, is 32.5 m3/h; front two adsorption channel 1 #, density is bottom coal 2 # 16g/t, 3 #, 4 #, is 5 # 18g/t, 6 #, to 7 # 20g/t; every 6 days once raises the coal , the average grade carries Jin Tan 7700g/t. The invention relates to a method for improving the grade of gold-loaded carbon in cyaniding carbon-in-pulp process gold extraction technology, which comprises: active carbon with the pulp adsorption concentration between 43 and 46 percent is added for adsorption, wherein the interval time for carbon extraction is between 5 and 7 days, and the blowing-in burdening density of an adsorption tank is between 15 and 20 g/t pulp. By utilization of the method, the grade of the gold-loaded carbon reaches approximately 6,000 g/t from approximately 2,500 g/t before improvement and is improved by one and half times on the premise of guaranteeing the adsorption rate of the active carbon. Because the carbon extraction frequency is reduced, the method reduces the labor intensity of workers, the consumption of the active carbon, and the production cost of enterprises. 1. A kind of improved Carbonitride gold-leaching process by carbon-loaded carbon grade in the method, which is characterized in that in order to 43-46% adsorption pulp concentration, by adding activated carbon to absorb, the time interval raises the coal 5-7 days, adsorption tank bottom coal density is 15-20g/t pulp. 2. In improving Carbonitride gold-leaching process by carbon-loaded carbon-grade method according to Claim 1, characterized in that each the same time in accordance with the density of the low front bottom coal high-gradient distribution is provided. 3. In improving Carbonitride gold-leaching process by carbon-loaded carbon-grade method according to Claim 1, characterized in that the number of the relevant 6-8 a. 4. In improving Carbonitride gold-leaching process by carbon-loaded carbon-grade method according to Claim 1, characterized in that the air supply of the various relevant 30-60m3/h. 5. -4 the improvement of states cyanidization in gold-leaching process by carbon-loaded carbon-grade method according to Claim 1, characterized in that with 43-46% adsorption pulp concentration, by adding activated carbon to absorb, 6-8 a series of blanking adsorption, the adsorption channel bottom coal density is 15-20g/t pulp, in accordance with the low front is high gradient distribution, the air output 30-60m3/h; raises the coal interval time is 5-7 days.