阅读说明：本技术 一种基于离子交换的从氰化贵液中提金的方法 (Method for extracting gold from cyanide pregnant solution based on ion exchange ) 是由 曾庆轩 何星存 郑斌 李运稳 周定怀 于 2020-11-09 设计创作，主要内容包括：本发明属于金矿提金技术领域,涉及氰化贵液中提金,具体是指一种基于离子交换的从氰化贵液中提金的方法,包括如下步骤：使用强碱型阴离子交换纤维对氰化贵液中的金氰络离子进行吸附；焚烧吸附了金氰络离子的强碱型阴离子交换纤维以获得粗金；对粗金进行提纯；所述强碱型阴离子交换纤维基于聚丙烯材料制成,所述强碱型阴离子交换纤维的纤度为1.8-6.0旦(dtex)。本提金方法生产效率高,经济效益和环境效益相对现有技术均得到提高。(The invention belongs to the technical field of gold extraction from gold ores, relates to gold extraction from cyanide pregnant solution, and particularly relates to a method for extracting gold from cyanide pregnant solution based on ion exchange, which comprises the following steps: adsorbing gold cyanide complex ions in the cyanide pregnant solution by using strong alkali type anion exchange fibers; burning the strong alkali type anion exchange fiber adsorbed with gold cyanide complex ions to obtain crude gold; purifying the crude gold; the strong alkali type anion exchange fiber is made of polypropylene materials, and the titer of the strong alkali type anion exchange fiber is 1.8-6.0 denier (dtex). The gold extraction method has high production efficiency, and the economic benefit and the environmental benefit are improved compared with the prior art.)

1. A method for extracting gold from cyanide pregnant solution based on ion exchange is characterized by comprising the following steps: adsorbing gold cyanide complex ions in the cyanide pregnant solution by using strong alkali type anion exchange fibers; burning the strong alkali type anion exchange fiber adsorbed with gold cyanide complex ions to obtain crude gold; and purifying the crude gold.

2. The method for extracting gold from cyanide pregnant solution based on ion exchange as claimed in claim 1, wherein the incineration temperature is 800-.

3. The method for extracting gold from cyanide pregnant solution based on ion exchange according to claim 1, wherein the strong base anion exchange fiber is made of polypropylene based material.

4. The method for extracting gold from cyanide pregnant solution based on ion exchange according to claim 1, wherein the strong base anion exchange fiber has a fineness of 1.8-6.0 denier (dtex).

5. The method for extracting gold from cyanide pregnant solution based on ion exchange according to claim 1, wherein the strong base anion exchange fiber has a fineness of 4.0 denier (dtex).

Technical Field

The invention belongs to the technical field of gold extraction from gold ores, relates to gold extraction from cyanide pregnant solution, and particularly relates to a method for extracting gold from cyanide pregnant solution based on ion exchange.

Background

At present, gold is produced from gold ore by crushing, grinding, ore pulp and other processes, a cyaniding method is used to prepare gold-containing cyaniding pregnant solution, gold is extracted from a pregnant solution pool, and the conventional zinc replacement method and activated carbon adsorption method are used to extract gold. The zinc replacement method has potential hazard of heavy metal pollution and complex technical operation; the activated carbon adsorption method can adsorb all impurities such as copper, lead, zinc, iron, calcium salt, organic matters and the like in the cyanide pregnant solution without difference, so that the gold-loaded carbon can be mixed with a large amount of heavy metal impurities, the difficulty is increased for the subsequent smelting process, and the production cost is increased. An efficient method for extracting gold from gold-containing cyanide pregnant solution is found, so that the production cost is effectively reduced, the environmental pollution is reduced, the sustainable development of gold production enterprises is realized, and the method becomes a long-term pursuit target of technicians in the field.

Disclosure of Invention

The invention aims to provide a method for extracting gold from pregnant cyanide solution based on ion exchange, which has high production efficiency and improved economic and environmental benefits.

The technical scheme for realizing the aim of the invention is as follows,

a method for extracting gold from cyanide pregnant solution based on ion exchange comprises the following steps: adsorbing gold cyanide complex ions in the cyanide pregnant solution by using strong alkali type anion exchange fibers; burning the strong alkali type anion exchange fiber adsorbed with gold cyanide complex ions to obtain crude gold; and purifying the crude gold.

Further, the incineration temperature is 800-1340 ℃.

Further, the strong base anion exchange fiber is made based on polypropylene material.

Further, the fineness of the strongly basic anion exchange fiber is 1.8 to 6.0 denier (dtex).

Further, the fineness of the strongly basic anion exchange fiber was 4.0 denier (dtex).

The method for extracting gold from the pregnant cyanide solution adopts strong alkali type anion exchange fibers which have extremely large specific surface area relative to activated carbon, the strong alkali type anion exchange fibers have high adsorption exchange speed, high plasticity, no expansion, small water flow resistance, large saturation capacity and super-strong adsorption capacity, the purification degree can reach one hundred million and one-tenth, the gold content of effluent can reach below 0.01PPM, the maximum utilization of gold resources is realized, and the strong alkali type anion exchange fibers only adsorb gold-containing anions (gold exists in the form of Au (CN) -anions) and do not adsorb other cations such as copper, lead, zinc, iron, calcium and the like in the pregnant cyanide solution, so that the purity of the crude gold obtained after incineration is higher than that of the prior art, and the purification cost can be effectively reduced.

Detailed Description

The present invention will be described in detail with reference to examples.

A method for extracting gold from cyanide pregnant solution based on ion exchange comprises the following steps: use of strong base type anion exchange fibers in the treatment of pregnant cyanide solutionGold cyanide complex ionCarrying out adsorption; burn and absorbGold cyanide complex ionTo obtain crude gold; purifying the crude gold; the incineration temperature is 800-; the strong base anion exchange fiber is made of polypropylene materials, the titer of the strong base anion exchange fiber used in the embodiment is 4.0 denier, and proper titer can be selected to ensure that the strong base anion exchange fiber has proper strength and can provide larger adsorption capacity. By using the method of the embodiment, gold extraction is carried out on the cyanide pregnant solution with gold content of 0.3 g/cubic meter, 500 g of strong alkali type anion exchange fiber is used, 50 cubic meters of cyanide pregnant solution is treated totally, the loading density is 200 kg/cubic, the flow rate is 5BV, the anion exchange fiber after saturated adsorption is incinerated, 15 g of crude gold is obtained totally, the gold content of effluent is almost close to 0, and all gold in the cyanide pregnant solution is adsorbed, so that the efficiency of the gold extraction method is very high.