Comprehensive utilization method of roasted gold concentrate

A gold concentrate and roasting technology, applied in chemical instruments and methods, phosphorus compounds, non-metallic elements, etc., can solve the problems of ineffective extraction, failure to comprehensively consider recycling and utilization, and multiple solid wastes, and achieve recycling rate. High, easy to operate, efficient extraction effect

Active Publication Date: 2018-12-25
KAIFENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the existing gold extraction methods have improved a lot and reduced environmental pollution, there are still the following deficiencies: (1) Only the selective leaching of gold is considered, and the recovery and utilization of iron and other valuable metals in gold mines are not considered comprehensively. Resulting in more solid waste; (2) Gold wrapped in pyrite, chalcopyrite, sphalerite, galena or between the above minerals and quartz crystal gaps cannot be effectively extracted, only Extract part of the free gold

Method used

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  • Comprehensive utilization method of roasted gold concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Taking the roasted gold concentrate of a company in Xinjiang as an example, its composition: Fe: 19.92%, Au: 52.1g / t, S: 1.61%, Cu: 0.25%, Pb: 0.12%.

[0032] Weigh 10Kg of roasted gold concentrate and place it in a 50L reactor, add 20L of dilute hydrochloric acid (concentration: 6mol / L) according to the liquid-solid ratio of 2:1 (mL / g), stir, heat to 120°C, and react at a constant temperature 1.0h; after the reaction, measure Fe in the system 3+ , Fe 3+ The concentration is 1.6mol / L, the temperature is controlled at 50°C, the air is ventilated, and the reaction is continued for 2h, filtered, washed, the leached residue can be used for building materials, and the gold leaching rate is determined to be 98.9%; add 100g of activated carbon to the leaching solution, and control the temperature Below 35°C, stir and adsorb for 3 hours, filter, and the gold-loaded charcoal enters the desorption and refining process, and the recovery rate of gold is 99.5%; adjust the pH to 2.5...

Embodiment 2

[0034] Taking the roasted gold concentrate of a company in Sichuan as an example, its composition: Fe: 15.46%, Au: 30.3g / t, S: 1.12%, Cu: 0.24%, Pb: 0.13%.

[0035] Weigh 10Kg of roasted gold concentrate and place it in a 50L reactor, add 15L of dilute hydrochloric acid (concentration: 4.5mol / L) according to the liquid-solid ratio of 1.5:1 (mL / g), stir, heat to 100°C, and keep the temperature constant React for 0.75h; after the reaction, measure Fe in the system 3+ , Fe 3+ Concentration is 1.5mol / L, and temperature is controlled at 40 ℃, ventilates, continues reaction 1.5h, filters, washes, and leaching residue can be used for building material, and the leaching rate of measuring gold is 98.8%; Add 75g activated carbon in the leaching liquid, control The temperature is below 35°C, stirred and adsorbed for 2h, filtered, and the gold-loaded charcoal enters the desorption and refining process, and the recovery rate of gold is 99.3%; adjust the pH to 1.8 in the processing ammonia...

Embodiment 3

[0037] Taking the roasted gold concentrate of a company in Lingbao, Henan as an example, its composition: Fe: 12.35%, Au: 8.0g / t, S: 0.78%, Cu: 0.22%, Pb: 0.15%.

[0038] Weigh 10Kg of roasted gold concentrate and place it in a 50L reactor, add 10L of dilute hydrochloric acid (concentration: 3mol / L) according to the liquid-solid ratio of 1:1 (mL / g), stir, heat to 80°C, and react at constant temperature for 0.5h ; After the reaction, measure Fe in the system 3+ , Fe 3+Concentration is 0.98mol / L, add 0.843kg ferric chloride to adjust Fe 3+ Concentration is to 1.5mol / L, and temperature is controlled at 30 ℃, feeds air, continues reaction 1h, filters, washes, and leaching residue can be used for building material, and the leaching rate of measuring gold is 98.6%; Add 50g activated carbon in the leaching solution, control The temperature is below 35°C, stirred and adsorbed for 1h, filtered, and the gold-loaded charcoal enters the desorption and refining process, and the recovery ...

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Abstract

The invention discloses a comprehensive utilization method of a roasted gold concentrate The comprehensive utilization method of the roasted gold concentrate comprises the following steps of strippinggold, leaching the gold, filtering, adsorbing, and post-treating an adsorption solution. The comprehensive utilization method of the roasted gold concentrate comprises the concrete steps of utilizingdiluted hydrochloric acid as a leaching agent, effectively stripping the gold in the gold concentrate, filtering, adding activated carbon into a filter liquor, and obtaining gold-loaded carbon and the adsorption solution; and conventionally desorbing and refining the gold-loaded carbon, adopting a fractional precipitation method on the adsorption solution to obtain precipitates such as iron phosphate and copper sulphide, filtering, adding ammonium hydroxide into the filter liquor, and obtaining an ammonium chloride product. The method is simple in whole technological process, easy to operate,and free of pollution, the gold leaching rate and the valuable metal recovery rate are effectively improved, and the solid wastes are reduced.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a comprehensive utilization method of roasted gold concentrate. Background technique [0002] Since the 1990s, cyanidation gold extraction technology has developed rapidly, and the successful application of new cyanide processes such as carbon slurry method, carbon leaching method, resin slurry method and heap leaching method has made cyanidation method widely used in today's gold production. Continue to be dominant. But, along with the development of economy and society, the pollution that cyanide method causes to the environment more and more causes people's attention, and the effect of cyanide method to difficult leaching gold ore is unsatisfactory in addition, therefore, study the method of extracting gold without cyanide New methods are imperative and meet the requirements of social development and scientific and technological progress. At present, the main methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/04C01B25/37C01C1/16C22B15/00C22B13/00
CPCC01B25/375C01C1/164C22B11/04C22B13/04C22B15/0063Y02P10/20
Inventor 师兆忠占桂荣王明瑞刘明海娄童芳韩艳霞
Owner KAIFENG UNIV
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