Magnetic suspension tunnel internal zone dividing method

Technology for secondary recovery of gold from flotation tailings

The invention particularly discloses a technology for the secondary recovery of gold from flotation tailings, which comprises the following steps: conducting cyclone classification on ore pulp of the flotation tailings, grinding the cyclone-classified grit as crude ore, conducting ore pulp mixing on the ground ore powder, conducting cyanide leaching of gold, absorbing the leached gold by active carbon, desorbing gold-loaded carbon after saturated adsorption, and electrolyzing the desorption solution after desorption, thus obtaining gold powder. Unlike conventional processes, the technology only needs investment on the power cost of equipment and material cost instead of implementing pit discharging and pit loading by staff and vehicles, therefore, compared with the conventional treatment method, the technology has the characteristics of low cost, large treatment quantity, continuous operation and the capability of enhancing the ore dressing recovery rate by floatation technology to the ...

Installing method for rail beam structure of magnetic suspension tunnel shoreside section

Fast gold-leaching process by CIP process

The invention belongs to all cyaniding carbon paste adsorption method gold extraction technology, and in particular relates to carbon paste method quick gold extraction technology. The technology comprises the steps of pulping, leaching and adsorption, and is characterized in that the pulping concentration is between 45 and 48 percent; the paste is stirred at the speed of between 250 and 300 revolutions per minute under the condition of pulping; the leaching temperature is controlled to be between 35 and 38 DEG C; and the pH value is between 10 and 12. The technology obviously reduces the pulping time and the leaching time, reduces equipment investment of a leaching tank, consumption of cyanide, the enterprise cost and the energy consumption, and increases the benefit.

Tensile adjustable connection mechanism for orbit beam

The invention provides a tensile adjustable connection mechanism for railway girders, which comprises a top plate, a bolt, a fastening nut, a pedestal and a fastening screw, wherein the bolt is connected with the pedestal through a screw thread; the fastening nut is screwed on the screw thread of the bolt and is connected with the pedestal through the fastening screw; and the pedestal is connected with a lower pre-embedded plate. The mechanism also includes a lower sliding plate with one convex end face, an upper sliding plate having one concave end face, and an upper buckle plate having a support surface, wherein the other end face of the upper sliding plate is disposed on the support surface; the upper buckle plate is fixedly connected with a top plate; a flange is arranged on one end of the bolt and has a concave end face and a lower convex surface; the lower sliding plate is disposed between the top plate and the bolt through the rotatable matching between the convex surface of the ...

Magnetic suspension tunnel internal partitioned form

Tensile adjustable connection mechanism for orbit beam

The invention provides a tensile adjustable connection mechanism for railway girders, which comprises a top plate, a bolt, a fastening nut, a pedestal and a fastening screw, wherein the bolt is connected with the pedestal through a screw thread; the fastening nut is screwed on the screw thread of the bolt and is connected with the pedestal through the fastening screw; and the pedestal is connected with a lower pre-embedded plate. The mechanism also includes a lower sliding plate with one convex end face, an upper sliding plate having one concave end face, and an upper buckle plate having a support surface, wherein the other end face of the upper sliding plate is disposed on the support surface; the upper buckle plate is fixedly connected with a top plate; a flange is arranged on one end of the bolt and has a concave end face and a lower convex surface; the lower sliding plate is disposed between the top plate and the bolt through the rotatable matching between the convex surface of the ...

Method for recovering gold from molybdenum concentrate

The invention relates to a method for recovering gold from molybdenum concentrate, which comprises: firstly, soaking the molybdenum concentrate into an alkaline solution with the pH value between 12 and 14 for 6 to 8 hours; and secondly, performing cyanidation leaching, adsorption and after-treatment on the molybdenum concentrate after alkaline leaching for recovery of the gold. The method fully utilizes mineral resources on the premise of basically not influencing concentrate after cyanidation and gold extraction, is simple, has high gold recovery rate which can basically reach more than 85 percent, and has obvious economic benefit.

Gold secondary recovery method from cyaniding gold concentrator tailings

The invention relates to a method for secondary gold recovery from cyanide gold tailing. The method comprises the following steps: preparing the cyanide gold tailing into pulp with the concentration of 30-35%, stirring, carrying out flotation, and adopting agents such as aerofloat, xanthate and pine camphor oil to recover gold during the flotation, wherein, the addition amount of the aerofloat is 35-40g/t, the addition amount of the xanthate is 160-180g/t and the addition amount of the pine camphor oil is 6-8g/t. The method combines carbon pulp and the flotation process to make up for each other, further improves the gold recovery rate, reduces the metal losses, minimizes the tailings grade under the existing condition, maximizes the benefits, has short construction period, low investment, fast action and significant economic benefit, and can earn XX yuan per month for an enterprise if an average of 0.15g gold can be recovered from each ton of tailings.

Method for treating cyanogen-containing tailing slurry produced in all-sliming carbon-in-pulp cyanidation process

The invention belongs to the technical field of all-sliming carbon-in-pulp cyanidation processes, and in particular discloses a method for treating cyanogen-containing tailing slurry produced in all-sliming carbon-in-pulp cyanidation process. The method comprises the steps of performing water-slurry separation on cyanogen-containing tailing slurry, filter-pressing separated slurry to be dry residue, directly discharging the dry residue added with water and returning cyanogen-containing wastewater obtained after separation to cyanidation flow for recycling after removing impurities and oil in the cyanogen-containing wastewater. The method is simple and convenient to operate, and returns the cyanogen-containing wastewater to the cyanidation flow for recycling because the cyanogen-containing wastewater contains CN-and OH-, thereby realizing the zero emission of the cyanogen-containing wastewater and reducing pollution on the one hand and reducing the amount of sodium cyanide used in the cyanidation ...