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Method for gold extraction by chlorination technology capable of improving utilization ratio of calcium chloride

A technology of calcium chloride and utilization rate, applied in the direction of improving process efficiency, etc., can solve problems such as equipment corrosion, increase production cost, calcium ion waste, etc., and achieve the effect of solving equipment corrosion, improving production efficiency, and improving utilization rate

Inactive Publication Date: 2018-10-12
GANSU ZHAOJIN PRECIOUS METALS SMELTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for extracting gold by chloride to improve the utilization rate of calcium chloride, which can solve the problem of low utilization rate of calcium chloride and a large amount of calcium in the prior art. Ion waste, pipeline crystallization, which affect production, equipment corrosion and increase production cost

Method used

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  • Method for gold extraction by chlorination technology capable of improving utilization ratio of calcium chloride

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Effect test

Embodiment 1

[0019] A method for extracting gold by chloride for improving the utilization rate of calcium chloride, comprising the following steps:

[0020] (1) The crushed ore and air oxygen are fed into the fluidized roaster, and the temperature in the roaster is maintained at 600°C, and the SO2 produced is sent to the sulfuric acid workshop;

[0021] (2) The ore roasted by the roaster is cooled by the cooler, and the temperature in the cooler is kept at 370°C, and then enters the first stage chlorinator and the second stage chlorinator, and goes to the first stage In the section chlorinator and the second section chlorinator, respectively feed recycled chlorine;

[0022] (3) The gas released from the first stage chlorinator and the second stage chlorinator enters the condensation system formed by the condensation chamber, and the calcium chloride concentrated in the condensation system contacts and reacts with the calcium chloride concentration equipment to generate CaAuCl4 and CaFeCl...

Embodiment 2

[0030] A method for extracting gold by chloride for improving the utilization rate of calcium chloride, comprising the following steps:

[0031] (1) The crushed ore and air oxygen are fed into the fluidized roaster, and the temperature in the roaster is maintained at 600°C, and the SO2 produced is sent to the sulfuric acid workshop;

[0032] (2) The ore roasted by the roaster is cooled by the cooler, and the temperature in the cooler is kept at 370°C, and then enters the first stage chlorinator and the second stage chlorinator, and goes to the first stage In the section chlorinator and the second section chlorinator, respectively feed recycled chlorine;

[0033] (3) The gas released from the first stage chlorinator and the second stage chlorinator enters the condensation system formed by the condensation chamber, and the calcium chloride concentrated in the condensation system contacts and reacts with the calcium chloride concentration equipment to generate CaAuCl4 and CaFeCl...

Embodiment 3

[0036] A method for extracting gold by chloride for improving the utilization rate of calcium chloride, comprising the following steps:

[0037] (1) The crushed ore and air oxygen are fed into the fluidized roaster, and the temperature in the roaster is maintained at 600°C, and the SO2 produced is sent to the sulfuric acid workshop;

[0038] (2) The ore roasted by the roaster is cooled by the cooler, and the temperature in the cooler is kept at 370°C, and then enters the first stage chlorinator and the second stage chlorinator, and goes to the first stage In the section chlorinator and the second section chlorinator, respectively feed recycled chlorine;

[0039] (3) The gas released from the first stage chlorinator and the second stage chlorinator enters the condensation system formed by the condensation chamber, and the calcium chloride concentrated in the condensation system contacts and reacts with the calcium chloride concentration equipment to generate CaAuCl4 and CaFeCl...

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Abstract

The invention discloses a method for gold extraction by chlorination technology capable of improving the utilization ratio of calcium chloride. The method for gold extraction by chlorination technology comprises the following steps: (1) crushed mineral, air and oxygen are fed into a fluidized roaster; (2) the mineral that is roasted by the fluidized roaster is cooled by a cooler, the cooled mineral enters a first-section chlorinator and a second-section chlorinator, and recycled chlorine is pumped into the first-section chlorinator and the second-section chlorinator; (3) a gas discharged fromthe first-section chlorinator and the second-section chlorinator enters a condensation system composed by a condensing chamber and is in contact and reacts with calcium chloride that is concentrated in a calcium chloride concentrator; and (4) chlorine and ineffective substances, generated in the condensation system, are cooled by a washer, washed by sulfuric acid and then fed into a circulatory chloride compressor for recompression, and part of returned airflow is taken out for liquidification by chloride distillation equipment. The method for gold extraction by chlorination technology has thefollowing beneficial effects: the utilization ratio of calcium chloride is high, the material is saved, and the production cost is low.

Description

technical field [0001] The invention relates to the field of chlorination gold extraction methods, in particular to a chlorination gold extraction method for improving the utilization rate of calcium chloride. Background technique [0002] As early as 1851, Pratt proposed to use chlorine gas to convert gold into gold chloride, and then extract gold chloride with water. This method was later adopted in Cyria. Allen was the first to recognize the volatilization of gold chloride. The volatilization of gold chloride has triggered a series of studies. In 1964, Shaffer and many Soviet scholars put forward valuable research, and the research work by Haig and Hill at the Colorado School of Mines at the end of 1970 culminated. The U.S. Bureau of Mines has recently proposed various chlorides of gold, their stable regions and Generate the latest thermodynamic data for these chlorides. [0003] The present gold chloride extraction method of calcium chloride utilization rate has the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/06
CPCC22B11/06Y02P10/20
Inventor 钱虎邵京明冯玉华高云陈学辉潘贵迟正峰温健爽
Owner GANSU ZHAOJIN PRECIOUS METALS SMELTING
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