阅读说明：本技术 一种利用钴离子、硫代硫酸钙浸金的方法 (Method for leaching gold by using cobalt ions and calcium thiosulfate ) 是由 杨俊奎 徐斌 于 2020-06-19 设计创作，主要内容包括：本发明公开了一种利用钴离子、硫代硫酸钙浸金的方法,包括以下步骤：S1、首先将含金原料置入破碎机的内部,通过破碎机对含金原料进行破碎,再将破碎的原料置入研磨机中,通过研磨机对破碎的原料进行研磨；S2、再对研磨后的原料,进行加水调节,形成矿浆。本发明涉及硫代硫酸钙浸金技术领域。该利用钴离子、硫代硫酸钙浸金的方法,在硫代硫酸钙浸金溶液中加入硫酸钴取代硫酸铜和氨水的加入；该方法浸金率与传统的硫代硫酸盐法相当,但其不仅消除了Cu(NH<Sub>3</Sub>)<Sub>4</Sub><Sup>2+</Sup>对S<Sub>2</Sub>O<Sub>3</Sub><Sup>2-</Sup>的氧化作用、Cu(S<Sub>2</Sub>O<Sub>3</Sub>)<Sub>2</Sub><Sup>3-</Sup>/Cu(S<Sub>2</Sub>O<Sub>3</Sub>)<Sub>3</Sub><Sup>5-</Sup>对树脂吸金的干扰,且还避免了氨的使用,从而能同时解决硫代硫酸盐消耗高、浸出液中金回收困难、NH<Sub>3</Sub>威胁环境的问题。(The invention discloses a method for leaching gold by using cobalt ions and calcium thiosulfate, which comprises the following steps: s1, firstly, placing the gold-containing raw material into a crusher, crushing the gold-containing raw material by the crusher, then placing the crushed raw material into a grinder, and grinding the crushed raw material by the grinder; and S2, adding water into the ground raw materials to adjust to form ore pulp. The invention relates to the technical field of gold leaching by using calcium thiosulfate. The method for leaching gold by using cobalt ions and calcium thiosulfate comprises the steps of adding cobalt sulfate instead of adding copper sulfate and ammonia water into a calcium thiosulfate gold leaching solution; the method has the gold leaching rate equivalent to that of the traditional thiosulfate method, but not only eliminates Cu (NH) 3 ) 4 2+ To S 2 O 3 2‑ Oxidation of (2), Cu (S) 2 O 3 ) 2 3‑ /Cu(S 2 O 3 ) 3 5‑ The interference to resin gold adsorption is avoided, and the use of ammonia is also avoided, thereby simultaneously solving the problems of high consumption of thiosulfate, difficult gold recovery in leachate and NH 3 And threatening the environment.)

1. A method for leaching gold by using cobalt ions and calcium thiosulfate is characterized by comprising the following steps:

s1, firstly, placing the gold-containing raw material into a crusher, crushing the gold-containing raw material by the crusher, then placing the crushed raw material into a grinder, and grinding the crushed raw material by the grinder;

s2, adding water into the ground raw materials for regulation to form ore pulp;

s3, adding cobalt sulfate into the ore pulp in S2, then adding thiosulfate, and adjusting the ore pulp by using sodium hydroxide;

and S4, placing the ore pulp in the step S3 into a stirrer, stirring the ore pulp by the stirrer, and finally carrying out gold leaching treatment.

2. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 1, wherein: the crusher in the S1 is any one of a jaw crusher, a back-impact crusher, a gyratory crusher, a cone crusher, a roller crusher, a hammer crusher or a vertical shaft impact crusher.

3. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 1, wherein: the grinding in the S1 adopts wet grinding, and the wet grinding is carried out until the grain size is-150 meshes, which accounts for more than 85%.

4. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 1, wherein: and water is added into the S2 to adjust the ore pulp to the mass concentration of 20-45%.

5. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 1, wherein: and adjusting the pH of the ore pulp to 7.5-10 by using sodium hydroxide in the S3.

6. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 1, wherein: and in the S4, gold is leached for 0-24h under the conditions that the stirring environment is 0-50 ℃ and the stirring speed is 100-300 r/min.

7. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 1, wherein: the machine that grinds to broken raw materials includes the box in S1, support frame fixedly connected with processing case is passed through at the top of box, the equal fixedly connected with hang plate in both sides at the top of the inner wall of processing case, the equal sliding connection in both sides of the inner wall of processing case has the straight-teeth plate, two the piece is ground all through branch fixedly connected with in one side that the straight-teeth plate is relative, the first motor of positive fixedly connected with of processing case, the output shaft fixedly connected with gear of first motor.

8. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 7, wherein: one end of each straight-tooth plate penetrates through the treatment box and extends to the outside of the treatment box, and one end of each straight-tooth plate, which extends to the outside of the treatment box, is meshed with the outer surface of the gear.

9. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 7, wherein: the equal fixedly connected with V type in both sides of the inner wall of box grinds the groove, the positive fixedly connected with second motor of box, the output shaft fixedly connected with axis of rotation of second motor, the one end of axis of rotation runs through the box extends to the inside of box, the axis of rotation extends to the one end of the inside of box rotate connect in the front of the inner wall of box, the axis of rotation is located the inside outer fixed surface of box is connected with the grinding miller.

10. The method for leaching gold by using cobalt ions and calcium thiosulfate as claimed in claim 7, wherein: the top of handling the case is provided with inlet tube and feed nozzle respectively, the bottom sliding connection of the inner wall of box has the silo that connects, the inside of handling the case with the inside of box is through the siphunculus intercommunication.

Technical Field

The invention relates to the technical field of calcium thiosulfate gold leaching, in particular to a method for leaching gold by using cobalt ions and calcium thiosulfate.

Background

At present, the cyanidation method is an important method for extracting precious metals such as gold, silver and the like from ores by soaking finely ground ore particles in a sodium (potassium) cyanide solution to make precious metals enter the solution and then reducing and precipitating the precious metals by using zinc powder or separating out the metals from the solution by other methods; cyanidation has long held an important position in the gold extraction industry because of the advantages of mature process, simple flow and the like. It has three significant drawbacks: (1) cyanide is extremely toxic, and seriously threatens the ecological environment and the health of human beings; (2) the gold leaching effect on refractory gold ores is poor, and more than one third of gold ore resources in China are refractory ores; (3) the gold leaching speed is slow, the leaching period is long, and the equipment utilization efficiency is low. Therefore, the development of non-cyanide gold leaching technology is significant. In non-cyanidation technology, the thiosulfate method has the advantages of non-toxic leaching agent, low price, high gold leaching rate, small corrosion of gold leaching in alkaline medium to equipment and the like, and is widely considered as the most potential substitution for cyanidation.

In the traditional thiosulfate method, copper and ammonia are added as catalysts, so that the gold leaching rate is obviously improved, but Cu (NH) is also present₃)₄ ²⁺Oxidation of S₂O₃ ^2-The consumption of leaching agent is large, the use of ammonia threatens the environment, and the gold in the leaching solution is difficult to recover.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a method for leaching gold by using cobalt ions and calcium thiosulfate, and solves the problems that a leaching agent is high in consumption, the use of ammonia threatens the environment, and the gold in a leaching solution is difficult to recover.

In order to achieve the purpose, the invention is realized by the following technical scheme: a method for leaching gold by using cobalt ions and calcium thiosulfate comprises the following steps:

s1, firstly, placing the gold-containing raw material into a crusher, crushing the gold-containing raw material by the crusher, then placing the crushed raw material into a grinder, and grinding the crushed raw material by the grinder;

s2, adding water into the ground raw materials for regulation to form ore pulp;

s3, adding cobalt sulfate into the ore pulp in S2, then adding thiosulfate, and adjusting the ore pulp by using sodium hydroxide;

and S4, placing the ore pulp in the step S3 into a stirrer, stirring the ore pulp by the stirrer, and finally carrying out gold leaching treatment.

Adding cobalt sulfate instead of adding copper sulfate and ammonia water into the thiosulfate gold leaching solution; the method has the gold leaching rate equivalent to that of the traditional thiosulfate method, but not only eliminates Cu (NH)₃)₄ ²⁺To S₂O₃ ^2-Oxidation of (2), Cu (S)₂O₃)₂ ^3-/Cu(S₂O₃)₃ ^5-The interference to resin gold adsorption is avoided, and the use of ammonia is also avoided, thereby simultaneously solving the problems of high consumption of thiosulfate, difficult gold recovery in leachate and NH₃And threatening the environment.

Further, the crusher in S1 is any one of a jaw crusher, a counterimpact crusher, a gyratory crusher, a cone crusher, a roller crusher, a hammer crusher, or a vertical shaft impact crusher.

Further, the grinding in the S1 adopts wet grinding, and the wet grinding is carried out until the grain size is-150 meshes, which accounts for more than 85%.

Further, water is added into the S2 to adjust the pulp to the mass concentration of 20-45%.

Further, the pH value of the ore pulp is adjusted to 7.5-10 by sodium hydroxide in the S3.

Further, in the S4, gold is leached for 0-24 hours under the conditions that the stirring environment is 0-50 ℃ and the stirring speed is 100-300 r/min.

Further, the machine of grinding that grinds broken raw materials includes the box in S1, the top of box is passed through support frame fixedly connected with and is handled the case, the equal fixedly connected with hang plate in both sides at the top of the inner wall of processing case, the equal sliding connection in both sides of the inner wall of processing case has the straight-teeth plate, two the piece is ground through branch fixedly connected with to one side that the straight-teeth plate is relative, the first motor of positive fixedly connected with of processing case, the output shaft fixedly connected with gear of first motor.

Further, one end of each of the two spur plates penetrates through the treatment tank and extends to the outside of the treatment tank, and one end of each of the two spur plates extending to the outside of the treatment tank is meshed with the outer surface of the gear.

Further, the equal fixedly connected with V type in both sides of the inner wall of box grinds the groove, the positive fixedly connected with second motor of box, the output shaft fixedly connected with axis of rotation of second motor, the one end of axis of rotation runs through the box and extends to the inside of box, the axis of rotation extends to the one end of the inside of box rotate connect in the front of the inner wall of box, the axis of rotation is located the inside outer fixed surface of box is connected with the grinding miller.

Further, the top of handling the case is provided with inlet tube and feed nozzle respectively, the bottom sliding connection of the inner wall of box has the silo that connects, the inside of handling the case with the inside of box is through the siphunculus intercommunication.

Compared with the prior art, the invention has the beneficial effects that:

the method for leaching gold by using cobalt ions and calcium thiosulfate comprises the steps of S1, firstly, placing a gold-containing raw material into any one of a jaw crusher, an impact crusher, a gyratory crusher, a cone crusher, a roller crusher, a hammer crusher or a vertical shaft impact crusher, crushing the gold-containing raw material by the crusher, then placing the crushed raw material into a grinder, and wet-grinding the crushed raw material by the grinder until the crushed raw material accounts for more than 85% of minus 150 meshes; s2, adding water into the ground raw materials to adjust the pulp to the mass concentration of 20-45% to form pulp; s3, adding cobalt sulfate into the ore pulp in the S2, then adding thiosulfate, and adjusting the pH value of the ore pulp to 7.5-10 by adopting sodium hydroxide; s4, placing the ore pulp in the S3 into a stirrer, stirring the ore pulp by the stirrer, leaching gold for 0-24h under the conditions that the stirring environment is 0-50 ℃, and the stirring speed is 100-300 r/min, and adding the calcium thiosulfate gold leaching solution into the gold leaching solutionAdding cobalt sulfate instead of copper sulfate and ammonia water; the method has the gold leaching rate equivalent to that of the traditional thiosulfate method, but not only eliminates Cu (NH)₃)₄ ²⁺To S₂O₃ ^2-Oxidation of (2), Cu (S)₂O₃)₂ ^3-/Cu(S₂O₃)₃ ^5-The interference to resin gold adsorption is avoided, and the use of ammonia is also avoided, thereby simultaneously solving the problems of high consumption of thiosulfate, difficult gold recovery in leachate and NH₃And threatening the environment.

Drawings

FIG. 1 is a schematic diagram of the steps of the method for leaching gold by using cobalt ions and calcium thiosulfate according to the present invention;

FIG. 2 is a schematic structural diagram of a grinding device in the method for leaching gold by using cobalt ions and calcium thiosulfate according to the present invention;

FIG. 3 is an external view of the structure of a grinding device in the method for leaching gold by using cobalt ions and calcium thiosulfate.

In the figure: 1-box body, 2-treatment box, 3-inclined plate, 4-straight tooth plate, 5-grinding block, 6-first motor, 7-gear, 8-V type grinding groove, 9-second motor, 10-rotating shaft, 11-grinding wheel, 12-water inlet pipe, 13-feeding nozzle and 14-material receiving groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a method for leaching gold by using cobalt ions and calcium thiosulfate comprises the following steps:

s1, firstly, placing the gold-containing raw material into a crusher, crushing the gold-containing raw material by the crusher, then placing the crushed raw material into a grinder, and grinding the crushed raw material by the grinder;

s2, adding water into the ground raw materials for regulation to form ore pulp;

s3, adding cobalt sulfate into the ore pulp in S2, then adding thiosulfate, and adjusting the ore pulp by using sodium hydroxide;

and S4, placing the ore pulp in the step S3 into a stirrer, stirring the ore pulp by the stirrer, and finally carrying out gold leaching treatment.

Adding cobalt sulfate instead of adding copper sulfate and ammonia water into the thiosulfate gold leaching solution; the method has the gold leaching rate equivalent to that of the traditional thiosulfate method, but not only eliminates Cu (NH)₃)₄ ²⁺To S₂O₃ ^2-Oxidation of (2), Cu (S)₂O₃)₂ ^3-/Cu(S₂O₃)₃ ^5-The interference to resin gold adsorption is avoided, and the use of ammonia is also avoided, thereby simultaneously solving the problems of high consumption of thiosulfate, difficult gold recovery in leachate and NH₃And threatening the environment.

The crusher in the S1 is any one of a jaw crusher, a back-impact crusher, a gyratory crusher, a cone crusher, a roller crusher, a hammer crusher or a vertical shaft impact crusher.

The grinding in the S1 adopts wet grinding, and the wet grinding is carried out until the grain size is-150 meshes, which accounts for more than 85%.

And water is added into the S2 to adjust the ore pulp to the mass concentration of 20-45%.

And adjusting the pH of the ore pulp to 7.5-10 by using sodium hydroxide in the S3.

And in the S4, gold is leached for 0-24h under the conditions that the stirring environment is 0-50 ℃ and the stirring speed is 100-300 r/min.

The grinder for grinding the crushed raw materials in the S1 comprises a box body 1, wherein the top of the box body 1 is fixedly connected with a processing box 2 through a support frame, two sides of the top of the inner wall of the processing box 2 are fixedly connected with inclined plates 3, two sides of the inner wall of the processing box 2 are slidably connected with straight tooth plates 4, one opposite sides of the two straight tooth plates 4 are fixedly connected with grinding blocks 5 through supporting rods, the front of the processing box 2 is fixedly connected with a first motor 6, and an output shaft of the first motor 6 is fixedly connected with a gear 7;

the first motor 6 is connected with an external power supply and a control switch, and is a forward and reverse rotating motor which is set in a connection mode and a coding mode in the prior art.

One end of each of the two spur plates 4 penetrates through the treatment tank 2 and extends to the outside of the treatment tank 2, and one end of each of the two spur plates 4 extending to the outside of the treatment tank 2 is meshed with the outer surface of the gear 7;

through the positive and negative rotation of gear 7, can drive the motion of two spur racks 4 tandem, and then drive the motion of two grinding blocks 5 tandem, and then can carry out first round to the raw materials that feed nozzle 14 was arranged into and grind, have better grinding effect.

Both sides of the inner wall of the box body 1 are fixedly connected with V-shaped grinding grooves 8, the front surface of the box body 1 is fixedly connected with a second motor 9, an output shaft of the second motor 9 is fixedly connected with a rotating shaft 10, one end of the rotating shaft 10 penetrates through the box body 1 and extends into the box body 1, one end of the rotating shaft 10 extending into the box body 1 is rotatably connected to the front surface of the inner wall of the box body 1, and the outer surface of the rotating shaft 10 positioned in the box body 1 is fixedly connected with a grinding wheel 11;

the second motor is connected with external power and control switch for drive axis of rotation 10 rotates, and rotation through axis of rotation 10 can drive grinding miller 11 and rotate, thereby can carry out the secondary to the raw materials after the first round of grinding and grind, has the function of multiple grinding, the effectual grinding effect that has improved, also guarantees grinding miller 11's life moreover.

The top of the treatment box 2 is respectively provided with a water inlet pipe 13 and a feeding nozzle 14, the bottom of the inner wall of the box body 1 is connected with a material receiving groove 15 in a sliding manner, and the inside of the treatment box 2 is communicated with the inside of the box body 1 through a through pipe;

the inlet tube 13 is connected with the external water supply department for pour into the water source into to the inside of handling case 2, and arrange to the inside of handling case 2 through 14 broken raw materialss of feed nozzle, the positive bottom of box is provided with the chamber door moreover, is convenient for connect taking out of silo 15.

When the gold-containing raw material crushing device works, S1, firstly, the gold-containing raw material is placed in any one of a jaw crusher, an impact crusher, a gyratory crusher, a cone crusher, a roller crusher, a hammer crusher or a vertical shaft impact crusher, the gold-containing raw material is crushed by the crusher, then the crushed raw material is placed in a grinding machine, and the crushed raw material is subjected to wet grinding by the grinding machine until the content of the crushed raw material is more than 85% of-150 meshes;

s2, adding water into the ground raw materials to adjust the pulp to the mass concentration of 20-45% to form pulp;

s3, adding cobalt sulfate into the ore pulp in the S2, then adding thiosulfate, and adjusting the pH value of the ore pulp to 7.5-10 by adopting sodium hydroxide;

s4, placing the ore pulp in the step S3 into a stirrer, stirring the ore pulp by the stirrer, and leaching gold for 0-24 hours under the conditions that the stirring environment is 0-50 ℃, and the stirring speed is 100-300 r/min.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.