Heterogeneous catalysis pretreatment method of Carlin type refractory gold ore

A technology for refractory gold ore and heterogeneous catalysis, applied in the field of ore mining, can solve the problems of high investment in hot-pressing alkaline leaching, low concentration of pretreated ore pulp, low normal-pressure alkaline leaching rate, etc. Low equipment requirements and guaranteed leaching effect

Inactive Publication Date: 2015-02-11
厦门紫金矿冶技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bacterial oxidation pretreatment pulp concentration is low, preoxidation time is long, and the applicability of bacteria is also subject to various restrictions
Atmospheric pressure alkaline leaching rate is low, hot pressure alkaline leaching investment is too high

Method used

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  • Heterogeneous catalysis pretreatment method of Carlin type refractory gold ore

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Effect test

Embodiment 1

[0027] In the treatment of a refractory gold mine in Guizhou, the metal minerals in the ore are pyrite, followed by arsenopyrite; the gangue minerals are mainly dolomite, calcite, quartz, hydromica, etc. The contents of gold, sulfur and arsenic in the ore are 12.3g / t, 3.1%, 0.3%.

[0028] (1) Pre-crushing 300g of ore through coarse crushing, fine crushing and ball milling until the particle size of 90% of the ore is less than 0.044mm;

[0029] (2) Add 21g of sodium carbonate, 12g of quicklime, 20g of sodium lignansulfonate, 4.5g of hydrogen peroxide (30%) and water with a molecular weight range of 5000 to 10000 to the crushed ore under the condition of aeration and mechanical stirring. 900mL of chemical heterogeneous catalytic pre-oxidation treatment to obtain pre-oxidized ore pulp, wherein the pre-oxidation treatment temperature is 80°C, the stirring speed is 750rpm, and the aeration flow rate per ton of ore is 5-50m 3 / h, the pretreatment time is 24 hours.

[0030] (3) Sti...

Embodiment 2

[0041] When dealing with a bauxite mine, the metal minerals in the ore are mainly diaspore, followed by hematite; the gangue minerals are mainly calcite. The contents of aluminum oxide, iron oxide and silicon dioxide in the ore are 65%, 6.11% and 8.56% respectively.

[0042] (1) Pre-crushing 200g of ore through coarse crushing, fine crushing and ball milling until 80% of the ore has a particle size of less than 0.075mm;

[0043](2) Add 200g of sodium carbonate, 230g of quicklime, 15g of sodium lignansulfonate in the molecular weight range of 5000 to 10000, 2.0g of sodium peroxide and 900mL of water to the crushed ore under the condition of aeration and mechanical stirring. The pre-oxidized pulp is obtained by heterogeneous catalytic pre-oxidation treatment, wherein the pre-oxidation treatment temperature is 60°C, the stirring speed is 750rpm, and the aeration flow rate per ton of ore is 5-50m 3 / h, the pretreatment time is 1 hour.

[0044] (3) The above-mentioned pre-oxidize...

Embodiment 3

[0048] When dealing with a molybdenum concentrate, the metal minerals in the ore sample are mainly molybdenite, followed by chalcopyrite; the gangue minerals are mainly sericite, quartz and plagioclase. The contents of molybdenum, copper and sulfur in molybdenum concentrate are 42.7%, 3.28% and 34.12% respectively.

[0049] (1) Pre-crushing 100g of ore through coarse crushing, fine crushing and ball milling until 90% of the ore has a particle size of less than 0.074mm;

[0050] (2) Under the conditions of aeration and mechanical stirring, add 132.5g of sodium carbonate, 78g of quicklime, 5g of sodium lignansulfonate with a molecular weight range of 5000 to 10000, and pre-fill with 1MPa of oxygen to carry out chemical heterogeneous catalysis The pre-oxidized pulp is obtained through pre-oxidation treatment, wherein the pre-oxidation treatment temperature is 150°C, the total pressure is 2MPa, the oxygen partial pressure is 1.52MPa, and the heat preservation and pressure treatmen...

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Abstract

The invention discloses a heterogeneous catalysis pretreatment method of a Carlin type refractory gold ore. The method comprises the following steps: (1) pre-crushing the ore; and (2) treating the crushed ore with a chemical heterogeneous catalysis pre-oxidization process under an aeration condition by adopting an alkaline reagent, an oxidant and a composite dispersant so as to obtain pretreated ore. The pretreatment method disclosed by the invention can be used for oxidizing sulfur in the Carlin type refractory gold ore so that coated gold existing in the form of sulfide can be exposed, and thus the leaching rate of the gold is increased.

Description

technical field [0001] The invention belongs to the technical field of ore mining, and in particular relates to a heterogeneous catalytic pretreatment method for Carlin type refractory gold ore. Background technique [0002] There are many types of gold mines in my country, and the reserves of gold mines are abundant, but low-grade refractory ores account for a relatively large proportion of the country's proven reserves, mainly Carlin-type gold deposits, which are typical and most difficult to treat. one of the gold mines. The gold ore resources in the "Golden Triangle" region of Yunnan, Guizhou and Guangxi are mainly Carlin-type gold deposits containing arsenic and carbon. mine. This type of ore is a double extremely difficult to treat ore, which is treated by conventional cyanide gold extraction process, and the gold leaching rate is very low, so this type of ore needs to be pretreated. [0003] At present, pretreatment methods such as roasting, autoclave acid leaching,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B3/12C22B11/00
CPCC22B11/04Y02P10/20
Inventor 陈景河黄怀国谢洪珍季常青林鸿汉陈庆根张卿马龙熊明
Owner 厦门紫金矿冶技术有限公司
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