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Method for measuring content of ferrous sulfate in pressurized oxidizing slag and cyanide slag of gold mine

A technology of oxide slag and ferrite, which is applied in measuring devices, instruments, scientific instruments, etc., to achieve the effects of convenient industrial application, easy-to-purchase and environmental protection of pharmaceuticals, and short method and process.

Active Publication Date: 2019-06-25
ZIJIN MINING GROUP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Finding out the content of jarosite in the tailings and its encapsulation of gold is especially important for subsequent process optimization. The applicant did not find any literature reports on the method of determining the content of jarosite in the oxidized slag and cyanide tailings of oxygen-gold ore pressurized pre-oxidation.

Method used

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  • Method for measuring content of ferrous sulfate in pressurized oxidizing slag and cyanide slag of gold mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The particle size of gold ore pressurized oxidation slag and cyanide slag is not more than 0.149mm. After fully mixing, bake at 100°C for 2 hours, and then cool to room temperature in a desiccator. Selectively dissolve gypsum, weigh 1.2568g of the material in a 500mL conical flask, add 300mL of 10% sodium chloride solution, leaching for 1.5h by shaking at room temperature, filter, discard the filtrate A, and repeatedly leaching twice until the gypsum in the slag is completely dissolved , to obtain residue A; put residue A in a beaker, add 150mL of 10% sodium hydroxide solution, soak at 90°C for 1.5h, filter, wash with distilled water for 5 to 7 times, collect filtrate B in a beaker, and after acidification, wash with 10% chlorine Precipitate the barium chloride solution, let it stand for 4 hours, filter, dry the residue C, and calcinate to constant weight at 800°C to obtain barium sulfate weight: 0.2602g. The molecular formula of Jarosite in the slag phase is confirmed ...

Embodiment 2

[0033] The particle size of the gold ore pressurized oxidation slag and cyanide slag is not more than 0.149mm. After fully mixing, bake at 100°C for 2 hours, place in a desiccator and cool to room temperature for use. Selectively dissolve gypsum, weigh 2.1231g of the material in a conical flask, add 300mL of 20% sodium chloride solution, leaching for 1 hour by shaking at room temperature, filter, discard the filtrate A, and repeatedly leaching the filter residue A for 3 times until the gypsum in the residue is completely dissolved ;Put the residue A in a beaker, add 200mL 20% sodium hydroxide solution, soak at 95°C for 1 hour, filter, wash with distilled water 5-7 times, discard the residue B, collect the filtrate B in the beaker, after acidification, use 10% Precipitate the barium chloride solution, let it stand for 4 hours, filter, discard the filtrate C, dry the residue C, and calcine at 800°C to constant weight to obtain barium sulfate weight: 0.6712g, and the molecular for...

Embodiment 3

[0035]The particle size of the gold ore pressurized oxidation slag and cyanide slag is not more than 0.149mm. After fully mixing, bake at 100°C for 2 hours, place in a desiccator and cool to room temperature for use. Selectively dissolve gypsum, weigh 3.0010g of the material in a conical flask, add 300mL of 5% sodium chloride solution, shake and leach for 1 hour at room temperature, filter, discard the filtrate A, and repeatedly leach the residue A for 3 times until the gypsum in the slag is completely Dissolve, put residue A in a beaker, add 200mL of 10% sodium hydroxide solution, soak at 85°C for 5 hours, filter, wash with distilled water for 5-7 times, collect filtrate B in a beaker, after acidification, use 10% barium chloride solution for precipitation , let it stand for 4 hours, filter, discard the filtrate C, dry the residue C, and calcinate to constant weight at 800°C to obtain barium sulfate with a weight of 0.1526g. 6 Fe 3 K 0.29 Na 0.69 o 14 S 2 , the molecular...

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Abstract

The invention relates to a method for measuring the content of ferrous sulfate in pressurized oxidizing slag and cyanide slag of a gold mine. The method is implemented through different phases. The method includes the following steps that: gypsum is selectively dissolved, sodium chloride or carbonic acid is added to the pressurized oxidizing slag and cyanide slag of the gold mine, shaking and leaching are carried out, so that a residue A is obtained; add sodium hydroxide or potassium hydroxide is added to the residue A, so that alkali dissolution leaching is carried out, filtering and washingare carried out, so that a filtrate B is obtained; after the filtrate B is acidized, barium chloride is added, so that precipitation can be carried out, and an obtained liquid stands still for 4h, filtering is carried out, and an obtained residue is calcined until the weight of the residue is constant, and barium sulfate is obtained, and the weight of the barium sulfate is measured; and the molecular formula of ferrous sulfate in the oxidizing slag and cyanide slag is confirmed by an X-ray diffractometer; and the content of the ferrous sulfate is calculated through an empirical formula, so that the proportion of the ferrous sulfate is obtained. With the method adopted, the content of the ferrous sulfate can be quickly measured. The method has the advantages of accurate and reliable measurement results, short process, simple operation, easiness in purchase medicament and environmental friendliness, and is suitable for field application in the metallurgical industry.

Description

technical field [0001] The invention relates to a method for determining the content of ferrosite in pressurized oxidation slag and cyanide slag of gold ore, which is suitable for application in the metallurgical industry. Background technique [0002] Hot-pressed oxidation is the most effective process for treating sulfide-coated gold ore. Its oxidation is thorough, efficient and environmentally friendly. It can process arsenic-containing ore and has a good treatment effect on fine-grained gold ore. The gold recovery rate can generally reach 90~ 95%. However, according to relevant literature reports at home and abroad, the ferrite commonly formed during the pressurized pre-oxidation process will produce secondary wrapping of gold, and a considerable proportion of gold will be lost to the ferrite in the subsequent cyanidation leaching. The problem of leaching. This problem has attracted great attention of scientific and technical personnel in the industry: Su Xiuzhu publis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
Inventor 苏秀珠陈景河池荷婷黄志华王乾坤李晶衷水平熊明蔡创开
Owner ZIJIN MINING GROUP
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