Energy-saving optimizing technology for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral

A technology of microwave roasting and sulfur-containing gold, which is applied in the direction of improving process efficiency, can solve problems such as groping, and achieve the effects of reducing the pressure of environmental protection, shortening pretreatment time, and reducing costs

Inactive Publication Date: 2012-10-31
FUJIAN SHUANGQISHAN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main components of lime sulfur are calcium polysulfide (CaSx) and calcium thiosulfate (CaS 2 o 3 ), the gold leaching process of the LSSS meth

Method used

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  • Energy-saving optimizing technology for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The gold mineral of this embodiment is the flotation gold concentrate of quartz and pyrite, and the multi-element analysis table of the gold concentrate is shown in Table 1. The valuable element in the gold concentrate is gold, the metal sulfide minerals are mainly pyrite, and the other minerals are mainly quartz and sericite.

[0036] According to the above analysis results, the gold concentrate of the present embodiment is processed according to the following steps:

[0037] 1) Add 300g of gold concentrate with a particle size of -200 mesh into a mixing tank and stir it with water, and adjust the slurry until the concentration of the mass percentage of the slurry is 70%;

[0038] 2) Pressurize the ore slurry into the reaction chamber of the microwave roasting furnace with a jet machine whose gas source is nitrogen, so that it forms a mist in the reaction room of the microwave roaster, and spray it into the reaction room with a jet machine whose gas source is nitrogen....

Embodiment 2

[0045] The gold mineral of this embodiment is the flotation gold concentrate of quartz and pyrite, and the multi-element analysis table of the gold concentrate is shown in Table 2.

[0046] According to the above analysis results, the gold concentrate of the present embodiment is processed according to the following steps:

[0047] 1) Put 500g of gold concentrate with a particle size of -200 mesh in a mixing tank and add water to stir, and adjust the slurry until the concentration of the mass percentage of the slurry is 60%;

[0048] 2) Pressurize the ore slurry into the reaction chamber of the microwave roasting furnace with a jet machine whose gas source is nitrogen, so that it forms a mist in the reaction room of the microwave roaster, and spray it into the reaction room with a jet machine whose gas source is nitrogen. 15g of lime powder, then roasted by microwave radiation in the reaction chamber, the roasting temperature is 380°C, the microwave power is 3kW, and the roast...

Embodiment 3

[0055] The gold mineral of this embodiment is the flotation gold concentrate of quartz and pyrite, and the multi-element analysis table of the gold concentrate is shown in Table 3.

[0056] According to the above analysis results, the gold concentrate of the present embodiment is processed according to the following steps:

[0057] 1) Add 500g of gold concentrate with a particle size of -200 mesh into a mixing tank and stir it with water, and adjust the slurry until the concentration of the mass percentage of the slurry is 80%;

[0058] 2) Pressurize the ore slurry into the reaction chamber of the microwave roasting furnace with a jet machine whose gas source is nitrogen, so that it forms a mist in the reaction room of the microwave roaster, and spray it into the reaction room with a jet machine whose gas source is nitrogen. 12g of lime powder, then roasted by microwave radiation in the reaction chamber, the roasting temperature is 500°C, the microwave power is 8kW, and the ro...

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Abstract

The invention discloses an energy-saving optimizing technology for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral, which includes the following steps: 1) feeding water to blend gold concentrate or gold ores into ore pulp; 2) spraying the newly-pressurized the ore pulp into the reaction chamber of a microwave roasting furnace to form spray, and simultaneously spraying lime powder to carry out microwave radiation roasting in the reaction chamber; 3) discharging the calcine from the microwave roasting furnace, feeding Fe2(SO4) 3 and FeSO4 into the calcine, and feeding water for fine grinding; and 4) feeding Na2SO3, copper sulfate and ammonia water into the fine ground ore pulp, and carrying out first-stage LSSS leaching; adding lime sulfur into the washed leaching residue after the first-stage LSSS leaching for second-stage LSSS leaching; and recovering the pyrrhotite from the leaching residue through the magnetic separation method after the second-stage LSSS leaching. By adopting the technical scheme, the leaching rate of the gold in the sulfur-bearing gold mineral or the gold concentrate can be improved to more than 97%.

Description

technical field [0001] The invention relates to an energy-saving optimization process for microwave roasting and non-cyanide gold leaching of sulfur-containing gold minerals, which is used for pretreatment of sulfur-containing gold ores and gold concentrates. Background technique [0002] With the gradual increase in the price of gold and the increasing application of gold in aerospace, electronics, medicine, information technology and new material industries, the development of gold has also attracted much attention, which has promoted the expansion of the scale of the gold industry and technological progress. In the metallurgical industry, with its excellent characteristics such as selective heating, uniform heating, internal heating, and rapid heating, microwave has made continuous progress in many aspects such as refractory ore pretreatment, mineral leaching, microwave calcination, microwave sintering, microwave drying, and microwave plasma. Progress, microwave metallurg...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B11/00C22B3/14
CPCY02P10/20
Inventor 陈金武郑新烟谢文清
Owner FUJIAN SHUANGQISHAN MINING
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