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Determination method of ferrosite content in gold ore pressurized oxidation slag and cyanide slag

A measuring method and technology for oxidizing slag, which are applied in measuring devices, material weighing, instruments, etc., to achieve the effect of convenient industrial field application, accurate and reliable measurement results, and simple operation.

Active Publication Date: 2021-06-08
ZIJIN MINING GROUP
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  • Claims
  • Application Information

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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.

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  • Determination method of ferrosite content in gold ore pressurized oxidation slag and cyanide slag

Examples

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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 present invention relates to a method for determining the content of ferrosite in pressurized gold ore oxidized slag and cyanide slag. Sodium, oscillating and leaching to obtain residue A; adding sodium hydroxide or potassium hydroxide to residue A for alkali-dissolution leaching, filtering and cleaning to obtain filtrate B; after acidifying filtrate B, adding barium chloride to precipitate, and standing 4h, filtered, and the obtained residue was calcined to constant weight to obtain barium sulfate, and the weight of barium sulfate was measured; the molecular formula of jarosite in the oxidation slag and cyanide slag was analyzed and confirmed by X-ray diffractometer; . It has the advantages of rapid determination of iron vitriol content, accurate and reliable determination results, short method flow, simple operation, easy-to-purchase medicament and environmental protection, and is suitable for on-site 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 Patents(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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