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Integrated utilization technique for multi-metal ore containing gold and silver by chlorine carrier chlorination method

A chlorination method and process technology, applied in the field of metallurgy, can solve problems such as high economic cost, heavy environmental pollution, and low technical indicators, and achieve the effects of good release performance, good adsorption selectivity, and simple and easy process

Inactive Publication Date: 2008-07-09
石嵩高
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although it is much more difficult to realize the technical difficulty of low-grade resource development, those original traditional mining and metallurgy technologies are difficult to achieve, because those dressing and smelting technologies used in rich ore resource conditions all have low technical indicators, or If there are defects such as high economic costs or heavy environmental pollution, traditional technologies must be transformed and innovated to develop new technologies suitable for comprehensive development and utilization of low-grade resources.

Method used

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  • Integrated utilization technique for multi-metal ore containing gold and silver by chlorine carrier chlorination method

Examples

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Effect test

Embodiment 1

[0023] A gold smelter purchases gold concentrate powder from various mines as raw materials. The plant mixes and processes 200 tons of gold concentrate powder per day, goes to the fluidized bed furnace for sulfation roasting, and recovers flue gas to produce sulfuric acid. The baked ballast is first immersed in copper under the condition of heating with dilute sulfuric acid (>80°C), and separated by a belt filter. The filtrate is sent to produce electrolytic copper. Filter residue with NaOH+Na 2 CO 3 After adjustment, two-stage cyanidation leaching of gold and silver is carried out. The first stage of cyanidation is 24 hours, and the second stage of cyanidation is carried out for 12 hours after the grinding operation is added in the middle to reach a fineness of 325 mesh. The immersion gold rate reaches 98%, and the immersion silver rate is about 70%. The thickener is separated, and the gold and silver are recovered from the precious liquid by zinc powder replacement meth...

Embodiment 2

[0041] The flotation gold concentrate powder of a gold mine, the gold concentrate powder of this mine has been tested for gold leaching by cyanide, and the effect is not good, so there is no gold extraction operation. The ore belongs to the low-sulfur pyrrhotite-type gold deposit, and contains a small amount of arsenic and graphite carbon, so the low-temperature chlorination roasting pretreatment scheme is selected. Take 200Kg flotation gold concentrate powder, add 15% sodium chloride powder, roast at 350°C-400°C for 6 hours, leave the kiln and let it cool down to become gray-red calcined sand.

[0042] The leaching of low-temperature chlorinated calcine is carried out in two steps. The first step is leaching with clear water. The experimental method is to take 100Kg of calcined sand and put it in the soaking bucket of Dashuo material, add it to soak in clean water according to the solid-liquid ratio S:L=1:4, start the mixer to stir and soak for 4 hours, and then use a filter ...

Embodiment 3

[0052] Silver concentrate powder from a silver mine. Containing silver (Ag) 4160 (g / t), Au36.4 (g / t), Pb2.80 (%), Zn0.96 (%) Cu0.51 (%), Cd0.13 (%), C ( Graphite carbon) > 4 (%). The mine was once identified as a difficult-to-smelt silver mine, mainly due to the influence of graphite carbon, which is not suitable for wet cyanidation to extract silver, so a pyro-smelting process was designed. Its pyrotechnic process involves ① roasting concentrate in slag furnace (flue gas to sulfuric acid) ② slag is collected in blast furnace with lead rain to collect gold and silver ③ crude lead is added sulfur to remove copper and alkali to remove arsenic and tin in refining pot Antimony ④ adding metal zinc to enrich gold and silver into a silver-zinc shell ⑤ vacuum steaming zinc in a zinc pot ⑥ ash blowing oxidation of noble lead to remove lead, ⑦ electrolytic separation of gold and silver, etc. It can be seen that the fire process is lengthy, many links, labor-intensive, and environment-f...

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Abstract

The invention discloses a mineral processing and metallurgical technology which comprehensively uses multi-metallic ore through a chloride carrier chlorination process, which comprises calcining crude ore into slag through grinding, flotation and concentrate powder, separating out gold, silver liquid and barren liquor from slag through pitch absorption by penetrating through chloridization leach pregnant solution, preparing gold and silver through chemically separating pregnant solution, depositing and filtering barren liquor to recycle and separate copper, lead and zinc, and reusing filter solution which is sodium chloride passing through the steps of chlorination leaching above. The mineral processing and metallurgical technology of the invention has the characteristics of no toxic and environment-friendly, fast speed, low cost and multiple-kind comprehensive recycling products. The invention has high comprehensive recovering index, the recovery ratio of gold and silver all can be larger than 95%, the recovery ratio copper, lead and zinc and the like which are comprehensively recovered all can be larger than 90%, and the invention can change ferro-sulphur ore into iron-smelting raw material. The invention is superior to traditional, which has significant technology superiority, economic benefits superiority, environmental benefit superiority and high comprehensive utilization degree.

Description

technical field [0001] The invention discloses a beneficiation and smelting process for the comprehensive utilization of gold-silver-containing polymetallic ores by a chlorine-carrying body chlorination method, which belongs to the technical field of metallurgy. Background technique [0002] Mining is an important industry to develop the country's underground mineral resources, but the traditional mining and metallurgy industry mostly exploits single rich ore resources, so the technical methods used are mostly dressing and smelting technologies that are only applicable to single types of minerals. For example, iron and steel smelters that mine iron ore, copper smelters that mine copper ore, and numerous lead smelters, zinc smelters, gold and silver and other professional mining and metallurgy industries. They are mining a large number of valuable rich ore resources, which leads to the mining of those non-renewable rich ore resources, and the low-grade ores that are much larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/20B03D1/00
CPCY02P10/20
Inventor 石嵩高
Owner 石嵩高
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