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Method for removing sodium and sulfur and enriching gold from crude antimony

A technology for enriching gold and crude antimony, applied in the field of metallurgy, can solve the problems of unsatisfactory metal antimony, complicated operation, long process, etc., and achieve the effect of good effect, simple operation process and efficient removal

Active Publication Date: 2020-05-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a long process and complicated operation, and needs to use a variety of different reducing agents, and the metal antimony obtained does not meet the requirements of the national standard for refined antimony

Method used

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  • Method for removing sodium and sulfur and enriching gold from crude antimony

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: as figure 1 As shown, the method steps of this crude antimony desalination and gold enrichment are as follows:

[0025] (1) The crude antimony (the mass percentage content of Sb is 83.78%, the Na content is 5.55%, the S content is 3.41%, the Au content is 150.05g / t, the Fe content is 0.25%, the As content is 0.067%, and the Se content is 0.25%. 0.049%) was added to the pre-melting furnace of the vacuum furnace, and the temperature was raised to 650 °C under an argon atmosphere for 60 minutes, so that the complex crystalline salt of sodium and sulfur in the crude antimony was transformed into a simple crystalline salt of sodium and sulfur, while the crude antimony was The antimony in the antimony is melted and the simple crystalline salt of sodium and sulfur is insoluble. After slag removal, the crude antimony with low sodium and sulfur is obtained (the mass percentage content of Sb is 97.12%, the content of Na is 0.17%, the content of S is 0.22%, and the cont...

Embodiment 2

[0027]Embodiment 2: the method steps of this crude antimony desalination and gold enrichment are as follows:

[0028] (1) The mass percentage content of crude antimony (Sb is 93.69%, Na content is 0.4%, S content is 1.53%, Au content is 48g / t, Fe content is 0.17%, As content is 0.044%, Se content is 0.033%) was added to the pre-melting furnace of the vacuum furnace, and the temperature was raised to 670 °C under an argon atmosphere, and then kept at a constant temperature for 120 minutes, so that the complex crystalline salt of sodium and sulfur in crude antimony was transformed into a simple crystalline salt of sodium and sulfur. The medium antimony is melted but the simple crystalline salts of sodium and sulfur are insoluble. After slag removal, the crude antimony with low sodium and sulfur is obtained (the mass percentage content of Sb is 98.53%, the content of Na is 0.09%, the content of S is 0.11%, and the content of Au is 170.27g / t);

[0029] (2) Add low-sodium crude a...

Embodiment 3

[0030] Embodiment 3: the method steps of this crude antimony desalination and gold enrichment are as follows:

[0031] (1) The crude antimony (the mass percentage content of Sb is 89.75%, the Na content is 3.2%, the S content is 2.19%, the Au content is 109.45g / t, the Fe content is 0.12%, the As content is 0.079%, and the Se content is 0.12%. 0.037%) was added to the pre-melting furnace of the vacuum furnace, and the temperature was raised to 700 °C under an argon atmosphere for 30 minutes, so that the complex crystalline salt of sodium and sulfur in the crude antimony was transformed into a simple crystalline salt of sodium and sulfur, while the crude antimony was The antimony in the antimony is melted and the simple crystalline salt of sodium and sulfur is insoluble. After slag removal, the crude antimony with low sodium and sulfur is obtained (the mass percentage content of Sb is 98.21%, the content of Na is 0.11%, the content of S is 0.13%, and the content of Au is 220.51g ...

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Abstract

The invention discloses a method for removing sodium and sulfur and enriching gold from crude antimony, and belongs to the technical field of metallurgy. The method comprises the following steps thatthe crude antimony is placed in a melting furnace arranged in front of a vacuum furnace firstly, the temperature is kept for 30 - 180 minutes after the temperature is increased to 650 - 700 DEG C in an inert atmosphere, complex crystalline salts of sodium and sulfur in the crude antimony are converted into simple crystalline salts of the sodium and the sulfur, meanwhile, antimony in the crude antimony melts while the simple crystalline salts of the sodium and the sulfur are unmelted, and low-sodium and sulfur crude antimony is obtained after slagging-off; and then the low-sodium and sulfur crude antimony is placed into the vacuum furnace, the pressure intensity in the furnace is controlled to be 1 - 20Pa through a vacuum pump, the temperature is kept for15 - 60 minutes after the temperature is increased to 700 - 900 DEG C, antimony in the crude antimony volatilizes and condenses in a condensation area, and gold is enriched in residues. The method has the advantages that the sodium andsulfur removal efficiency is high, the obtained metallic antimony is good in quality, the gold enrichment effect is remarkable, the direct yield is high, the technological process is simple, and no pollution is caused to the environment.

Description

technical field [0001] The invention relates to a method for desodium-sulfurization of crude antimony and enrichment of gold, belonging to the technical field of metallurgy. Background technique [0002] Antimony-gold symbiotic resources are an important part of antimony and gold resources in my country. In this resource, gold is closely combined with metal sulfides, and most of them are embedded in stibnite, pyrite and arsenopyrite in the form of particles, so conventional beneficiation is carried out. The method is difficult to achieve effective separation of antimony and gold. The sodium sulfide leaching process utilizes the characteristics that antimony sulfide easily reacts with alkali metal sulfides while gold does not react with alkali metal sulfides, and is widely used in the treatment of antimony-containing gold ores; 2 S and NaOH mixed solution leaches antimony-containing gold ore to obtain antimony-containing leaching solution and gold-rich residue; the antimony-c...

Claims

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Application Information

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IPC IPC(8): C22B30/02C22B9/04C22B9/02C22B11/02
CPCC22B30/02C22B9/04C22B9/006C22B9/02C22B11/02Y02P10/20
Inventor 徐宝强张峰王文静邓勇熊恒杨斌王飞田阳刘大春曲涛蒋文龙李一夫杨佳孔令鑫孔祥峰戴永年
Owner KUNMING UNIV OF SCI & TECH
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