Low-grade gold ore pile soaking technology based on high-pressure roller smashing

A low-grade, high-pressure roller technology, applied in the field of metallurgy, can solve problems such as increased crushing costs, greater difficulty in dissociation, and restrictions on the development of gold mining enterprises, so as to reduce the consumption of leaching agents, speed up the reaction rate, and shorten the heap leaching cycle. Effect

Inactive Publication Date: 2016-01-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, as the grade of gold ore gradually declines, the number of difficult-to-separate micro-embedded gold ores increases, and dissociation becomes more difficult, requiring fine grinding or ultra-fine grinding, and the cost of grinding and grinding increases year by year, which restricts the development of gold mining enterprises

Method used

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  • Low-grade gold ore pile soaking technology based on high-pressure roller smashing
  • Low-grade gold ore pile soaking technology based on high-pressure roller smashing
  • Low-grade gold ore pile soaking technology based on high-pressure roller smashing

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A very low-grade oxidized gold ore, the gold content in the ore is 0.34g / t, the metal minerals are mainly limonite and pyrite; most of the gangue minerals are quartz, and the ore has a high mud content. The ore sample adopts two types of jaw crushers, PEX-150×250 and XPC-60×100, and a closed-circuit crushing process consisting of a 20mm round hole screen for primary and secondary crushing to ensure that the particle size of the ore is less than 20mm, and then PEF- The 60×100 jaw crusher is used for fully open-circuit fine crushing (the width of the ore discharge port of the jaw crusher is controlled to be 4~7mm). The crushed products of the jaw crusher are screened and classified, and the materials with a particle size of +0.15mm (accounting for 90.01%) are used as column leaching test samples. =650mm, the spray intensity of peristaltic pump is 10L / m 2 h, the concentration of sodium cyanide solution is 0.8g / L, leaching for 20 days in a closed circuit (poor solution is ...

Embodiment 2

[0028] A very low-grade oxidized gold ore, the gold content in the ore is 0.34g / t, the metal minerals are mainly limonite and pyrite; most of the gangue minerals are quartz, and the ore has a high mud content. The ore sample adopts the closed-circuit crushing process consisting of PEX-150×250 and XPC-60×100 jaw crushers and 20mm round hole sieves for primary and secondary crushing to ensure that the ore particle size is less than 20mm, and then CLM- 25-10 high pressure roller mill for full open circuit fine crushing. The diameter of the two rollers of the high-pressure roller mill is 250mm, the width of the two rollers is 100mm, and the pressure on the roller surface is controlled at 3.5N / mm 2 , the distance between the two rollers is 4~7mm, and the roller speed is 0.4m / s. The products crushed by high-pressure rollers are screened and classified, and the +0.15mm particle size material (accounting for 80.66%) is used as a column leaching test sample. The sample is fed into a s...

Embodiment 3

[0031] A very low-grade oxidized gold ore, the gold content in the ore is 0.34g / t, the metal minerals are mainly limonite and pyrite; most of the gangue minerals are quartz, and the ore has a high mud content. The ore sample adopts the closed-circuit crushing process consisting of PEX-150×250 and XPC-60×100 jaw crushers and 20mm round hole sieves for primary and secondary crushing to ensure that the ore particle size is less than 20mm, and then CLM- 25-10 high pressure roller mill for full open circuit fine crushing. The diameter of the two rollers of the high-pressure roller mill is 250mm, the width of the two rollers is 100mm, and the pressure on the roller surface is controlled at 5.5N / mm 2, the distance between the two rollers is 4~7mm, and the roller speed is 0.4m / s. The products crushed by high-pressure rollers are screened and classified, and the +0.15mm particle size material (accounting for 78.13%) is used as the column leaching test sample. The sample is fed into a ...

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Abstract

The invention discloses a low-grade gold ore pile soaking technology based on high-pressure roller smashing and belongs to the technical field of metallurgy. The low-grade gold ore pile soaking technology comprises the following steps that firstly, raw gold ore is coarsely smashed in an open circuit mode, the coarsely-smashed product is all fed into a medium smashing system and classified through a vibrating screen, coarse materials on a screen are returned to medium smashing equipment to continue to be smashed, and proper screened materials enter a high-pressure roller smashing machine; secondly, the proper screened materials are subjected to open circuit fine smashing through the high-pressure roller smashing machine, the product is subjected to combined action of a wet vibrating screen and classifying equipment, fine overflow products are fed into an all-slimed cyanide leaching system, settled sand and coarse grain materials are mixed with lime with properly-blended soda and then fed into a storage yard to be piled together, and the classifying leaching technology of gold ore materials is achieved; thirdly, a precious solution containing gold and tailings are obtained after leaching is completed. According to the low-grade gold ore pile soaking technology, high-pressure roller open-circuit fine smashing is adopted, the product granularity of the product is fine, surface micro cracks are rich, the gold leaching rate can be remarkably increased, consumption of a leaching agent can be reduced, and the piling leaching cycle can be shortened. The product with fine granularity grades is recycled while piling leaching is conducted.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a low-grade gold ore heap leaching process based on high-pressure roller crushing. Background technique [0002] my country's non-ferrous metal mineral resources have many lean ore, few rich ore, and many small and complex symbiotic mines. These characteristics are particularly prominent in gold mines. my country's gold mine resources are widely distributed, including more than 30 concentrated areas such as Jiaodong, Xiaoqinling, Yanliao, Shaanxi, Gansu and Ningxia, but the scale of gold mines is generally small. At present, there are more than 7,000 proven gold deposits, most of which have reserves of less than 100 tons, and the gold grade of large gold deposits is extremely low. At the same time, as the grade of gold ore gradually declines, the number of difficult-to-select micro-embedded gold ores increases, and dissociation becomes more difficult, requiring fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B02C21/00
Inventor 印万忠唐远马英强黄发兰
Owner FUZHOU UNIV
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