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Fluidization roasting method for gold sulfide ore

A technology of fluidized roasting and gold ore, which is applied in the field of fluidized roasting of sulfide gold ore, can solve the problems of waste of resources, high environmental protection costs of enterprises, high gold content in cyanidation tailings, and achieve full and complete combustion

Inactive Publication Date: 2011-07-20
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, the two-stage roasting pretreatment technology for arsenic-containing refractory gold concentrate developed on the basis of boiling oxidation roasting of gold concentrate has been rapidly developed in China, but the two-stage roasting smelting process of gold concentrate currently in operation The main problems in the process are that the gold content in cyanidation tailings is still high, the waste of resources is serious, and the cost of environmental protection for enterprises is relatively high

Method used

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  • Fluidization roasting method for gold sulfide ore
  • Fluidization roasting method for gold sulfide ore
  • Fluidization roasting method for gold sulfide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The main chemical composition of sulfide gold ore is listed in Table 1.

[0043] Table 1 The chemical element composition (%) of embodiment 1-sulfide gold ore

[0044]

[0045] *Note: The units of Au and Ag are g / t.

[0046] The sulfide gold ore, with 8% water content, is crushed to -8mm, and quantitatively fed into the airlock belt scale at the entrance of the vertical mill, and the crushed coal crushed to -30mm is also quantitatively and evenly fed into the airlock belt scale at the entrance of the vertical mill , the amount of coal added is 3% of the amount of sulfide gold ore, and the sulfide gold ore and coal are sent to the vertical mill through the air lock belt scale for hot air drying and grinding classification. The hot air comes from the hot blast stove, and the temperature of the hot air entering the vertical mill is 300 oC , the hot air temperature at the outlet of the vertical mill is 70 oC , the dried and finely ground mixture of mineral powder an...

Embodiment 2

[0054] The main chemical composition of sulfide gold ore is listed in Table 2.

[0055] Table 2 The chemical element composition (%) of embodiment 2-sulfide gold ore

[0056]

[0057] * Note: The units of Au and Ag are g / t.

[0058] The sulfide gold ore, with a water content of 6%, is crushed to -8mm, and quantitatively fed into the airlock belt scale at the entrance of the vertical mill, and the crushed coal crushed to -30mm is also quantitatively and evenly fed into the airlock belt scale at the entrance of the vertical mill , the amount of coal added is 3% of the amount of sulfide gold ore, and the sulfide gold ore and coal are sent to the vertical mill through the air lock belt scale for hot air drying and grinding classification. The hot air comes from the hot blast stove, and the temperature of the hot air entering the vertical mill is 300 oC , the hot air temperature at the outlet of the vertical mill is 75 oC , the dried and finely ground mixture of mineral pow...

Embodiment 3

[0066] The main chemical composition of sulfide gold ore is listed in Table 3.

[0067] Table 3 The chemical element composition (%) of embodiment 3-sulfide gold ore

[0068]

[0069] * Note: The units of Au and Ag are g / t.

[0070] Feed sulfide gold ore with 8% water content into the air-lock belt scale at the entrance of the vertical mill, and at the same time, crush the coal crushed to -20mm into the air-lock belt scale at the entrance of the vertical mill in a quantitative and uniform manner. The amount of coal added It is 3% of the amount of sulfide gold ore. The sulfide gold ore and coal are sent to the vertical mill through the air lock belt scale for hot air drying and grinding classification. The hot air comes from the hot blast furnace, and the temperature of the hot air entering the vertical mill is 350 oC , the hot air temperature at the outlet of the vertical mill is 85 oC , the dried and finely ground mixture of mineral powder and coal powder is pneumatic...

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Abstract

The invention discloses a fluidization roasting method for a gold sulfide ore, and relates to a method for pretreating a refractory and complex primary gold ore (or low-sulfur concentrate), particularly a fine particle-covered refractory gold ore containing arsenic, sulfur and carbon, by calcine external circulation return roasting. The fluidization roasting method for the gold sulfide ore is characterized by comprising the following steps of: (1) adding the gold sulfide ore into coal and drying, finely grinding and mixing the mixture in a vertical milling machine; (2) performing fluidization roasting; and (3) performing water quenching on the calcine which is subjected to the fluidization roasting and then cyaniding and immersing in gold. By the method, the problem of low gold extraction recovery rate in the conventional flow of an arsenic-containing refractory gold ore at present is solved; compared with the conventional process, the method has the advantages that: the gold recovery rate is improved by more than 5 to 15 percent in the calcine external circulation return roasting pretreatment process adopted by the arsenic-containing refractory gold ore; and the method is applicable to the field of gold extraction of primary gold ore roasting and smelting and the field of pretreatment of the low-sulfur concentrate roasting.

Description

technical field [0001] A fluidized roasting method for sulfide gold ore, which relates to a refractory complex primary gold ore (or low-sulfur concentrate), especially a refractory gold ore containing arsenic, sulfur, carbon, and fine-grained particles wrapped by calcined sand Material roasting pretreatment method. Background technique [0002] At present, for refractory primary gold ores, especially arsenic-containing gold ores, gold concentrates are still produced by dressing and smelting technology. The production of arsenic-containing refractory gold concentrate is mainly carried out in two ways, one is to build a smelter on the spot, and through oxidation pretreatment. At present, the pre-oxidation treatment of refractory gold concentrate before gold extraction mainly includes There are three methods of roasting oxidation, pressurized oxidation and bacterial oxidation; the second is to mix the gold concentrate and sell it to copper-lead fire smelters, and recover preci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/10C22B11/08
Inventor 王云李云袁朝新孙留根黄海辉常耀超梅玉伟何国华郭持皓
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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