High-Arsen gold ore pretreatment method

A technology of pretreatment and high arsenic gold concentration, which is applied in the field of refractory gold ore separation, can solve the problems of difficult recovery of useful components of environmental pollution, etc., and achieve the effect of simple operation, simple pretreatment process and low cost

Inactive Publication Date: 2010-05-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned methods all have defects such as under-burning, over-burning and environmental pollution and other useful components are not easy to recycle to varying degrees.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 1000g of a high-arsenic gold concentrate in Liaoning, add 150g of quicklime, 50g of NaCl, 100g of NaOH, 5g of ethylsulfide, CaF 2 10g, stirred evenly, put into a closed oxidizer in separate compartments, heated to 500°C under closed conditions, pressurized to 3 atmospheres, and oxidized for 6 hours. High arsenic gold concentrate and added quicklime, salt, alkali, calcium fluoride and ethylsulfur nitrogen are converted into natural gold, limonite, iron oxide, poisonous stone, gypsum, other independent minerals or oxides and gases mainly hydrogen sulfide. Open the exhaust valve of the airtight oxidizer connected to the gas recovery device, the gas enters the gas recovery device, and recover SO with activated carbon or alkaline solution 2 Gas; what remains in the closed oxidizer after venting is solids, including native gold, limonite, iron oxide, poisonous stone, gypsum, and other isolated minerals or oxides; open the closed oxidizer vent to release the closed oxidi...

Embodiment 2

[0035] Take 1000g of a high-arsenic gold concentrate in Liaoning, add 200g of quicklime, 10g of NaCl, 100g of NaOH, 3g of ethylsulfite, CaF 2 5g, stirred evenly, put into a closed oxidizer in separate compartments, heated to 400°C under closed conditions, pressurized to 8 atmospheres, and oxidized for 8 hours. High arsenic gold concentrate and added quicklime, salt, alkali, calcium fluoride and ethylsulfur nitrogen are converted into natural gold, limonite, iron oxide, poisonous stone, gypsum, other independent minerals or oxides and gases mainly hydrogen sulfide. Open the exhaust valve of the airtight oxidizer connected to the gas recovery device, the gas enters the gas recovery device, and recover SO with activated carbon or alkaline solution 2 Gas; what remains in the closed oxidizer after venting is solids, including native gold, limonite, iron oxide, poisonous stone, gypsum, and other isolated minerals or oxides; open the closed oxidizer vent to release the closed oxidiz...

Embodiment 3

[0037] Take 1000g of a high-arsenic gold concentrate in Jilin, add 100g of quicklime, 5g of NaCl, 50g of NaOH, 2g of ethylsulfide, CaF 25g, stirred evenly, put into a closed oxidizer in separate compartments, heated to 120°C under closed conditions, pressurized at 16 atmospheres, and oxidized for 24 hours. High arsenic gold concentrate and added quicklime, salt, alkali, calcium fluoride and ethylsulfur nitrogen are converted into natural gold, limonite, iron oxide, poisonous stone, gypsum, other independent minerals or oxides and gases mainly hydrogen sulfide. Open the exhaust valve of the airtight oxidizer connected to the gas recovery device, the gas enters the gas recovery device, and recover SO with activated carbon or alkaline solution 2 Gas; what remains in the closed oxidizer after venting is solids, including native gold, limonite, iron oxide, poisonous rock, gypsum, and other isolated minerals or oxides; open the closed oxidizer vent to release the closed oxidizer T...

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PUM

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Abstract

The invention relates to a high-Arsen gold ore pretreatment method which comprises the following steps of: crushing high-Arsen gold ore into power which is not more than 200 meshes; enriching to obtain high-Aresen gold concentrate fines; adding NaCl, NaOH and diethyldithiocarbamate in proportion; uniformly stirring and filling in an oxidizer; heating and pressurizing for a while under a closed condition; and recovering residual gas by using active carbon or an alkaline solution, wherein solid substances generated after oxidation contain native gold, limonite, ferric oxide, arsenic bloom and mixtures of other impurities. The method solves the problems of the prior art, such as under-burning, over-burning, environment pollution, difficult recovery of other useful components and the like. Through pretreatment experiments of several high-Arsen gold fine mines, after oxidization, Arsen, gold and other components are converted into native gold, ferric oxide, arsenic bloom, gypsum and other independent minerals or oxides; the method facilitates the recovery of other useful components, has no problems of under-burning and over-burning, and ensures that the pretreatment process has no environment pollution, simple process and convenient operation.

Description

Technical field: [0001] The invention relates to a sorting technology for refractory gold ore, in particular to an oxidation pretreatment method for sorting high-arsenic and high-sulfur gold ore. Background technique: [0002] The existing pretreatment methods for high-arsenic gold mines include: roasting oxidation pretreatment method, wet chemical pretreatment method, bacterial oxidation pretreatment method, vacuum arsenic removal method, volatilization smelting method, and segregation roasting method. [0003] The roasting oxidation method is a traditional process in non-ferrous metal dressing and smelting, and it is also the most general and reliable method for treating gold-bearing sulfide ores, especially carbonaceous sulfide ores. Roasting is a multiphase chemical reaction process, and its main influencing factors are: temperature, physical and chemical properties of reactants and products (particle size, porosity, chemical composition, etc.), air flow characteristics,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02
Inventor 张渊张兴洲李俊锋佘振宝张五荣
Owner JILIN UNIV
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