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Mineral processing method for enriching precious metals in raw ore

A mineral processing method and precious metal technology, applied in the field of mineral processing process optimization, can solve the problems of high cost, low enrichment, ecological damage, etc., and achieve the effect of low cost, good enrichment, and small environmental damage

Inactive Publication Date: 2020-08-07
梁波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a beneficiation method for enriching precious metals in raw ore to overcome the problems of high cost, low enrichment and serious ecological damage in current beneficiation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A beneficiation method for enriching precious metals in raw ore, comprising the steps of:

[0031] (1) First crush the raw ore with a pulverizer to obtain raw ore powder, add tap water to the raw ore powder, stir evenly, then add concentrated sulfuric acid and oxidizing agent while stirring, stir for 2 hours, use a plate press to carry out solid-liquid separation, and obtain the Slag of precious metals and liquid containing base metals; the particle size of raw ore powder is 200 mesh; the liquid-solid ratio of tap water and raw ore powder is 3-5:1; the addition of concentrated sulfuric acid is 10-20L / ton of raw ore, the oxidant It is hydrogen peroxide, and its addition amount is 3L / ton of raw ore;

[0032] (2) The base metal-containing liquid obtained in step (1) is hydrolyzed by sodium hydroxide, settled, the pH is adjusted to 8, and the precipitate is collected, which is the base metal, and the water is recycled;

[0033] (3) Add tap water to the precious metal-conta...

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Abstract

The invention discloses a mineral processing method for enriching precious metals in raw ore. The mineral processing method comprises the following steps that (1) tap water is added into raw ore powder, then concentrated sulfuric acid and an oxidant are added and stirred for 2 h, and solid-liquid separation is conducted to obtain slag and liquid containing precious metals; (2) the liquid obtainedin the step (1) is hydrolyzed and settled by sodium hydroxide to collect precipitates; (3) industrial grade nitric acid, sodium bromide and the oxidant are sequentially added while stirring in the slag obtained in the step (1); (4) hydrochloric acid, sodium chlorate, sodium chloride, sodium hypochlorite and hydrogen peroxide are added, and stirring is continued when the potential of reaction liquid is 670 mV and the pH value is 0 to 0.5; (5) the solid-liquid separation is conducted, the slag is discarded to obtained the clear liquid containing the precious metals, heating is continuously conducted to 80 DEG C, a 8% sodium sulphide solution is added, the pH value is adjusted, stirring is conducted for 2 h, the precipitates are collected and hydrolyzed with concentrated hydrochloric acid, and the black precipitates after hydrolysis are collected; and (6) impurity removal is conducted, acid pickling is conducted, stirring and washing are conducted with dilute hydrochloric acid and then dilute sulfuric acid, and filtering and drying are conducted to obtain precious metal powder.

Description

technical field [0001] The invention belongs to the technical field of beneficiation process optimization, in particular to a beneficiation method for enriching precious metals in raw ore. Background technique [0002] Precious metals are important materials in the defense industry, mainly used in aerospace, aviation, missiles, rockets, microelectronics technology and other fields, and are known as "modern new metals" and "vitamins of modern metal industry". According to statistics, the distribution of precious metal reserves in major countries in the world is: 89.26% in South Africa, 1.18% in the United States, 9.08% in Russia, 0.42% in Canada, and 0.06% in others. [0003] At present, the reported methods for "enrichment" to extract precious metals mainly include the following: [0004] 1. Crushing, screening, gravity separation, flotation, magnetic separation, combination separation, compound separation, the purpose is "enrichment". [0005] 2. Simmering in concentrated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/06
CPCC22B11/04C22B11/06Y02P10/20
Inventor 梁波
Owner 梁波
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