Method for treating antimony sulfide concentrate through sulfide phase reductive transformation-ore dressing

An antimony sulfide and sulfide technology, applied in the field of non-ferrous metal metallurgy, can solve the problems of flue gas pollution to the environment and high energy consumption, achieve the effects of low reaction temperature, low energy consumption, and meet the requirements of large-scale industrial production

Inactive Publication Date: 2015-10-14
CENT SOUTH UNIV
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Problems solved by technology

[0005] Aiming at the existence of a large amount of low-concentration SO in the current pyrochemical antimony smelting process 2 To solve the problems of flue gas pollution, high energy consumption, etc., the purpose of the present invention is to provide a sulfide phase reduction conversion-mineralization method using secondary zinc oxide as a sulfur-fixing agent, which can continuously process antimony sulfide concentrate on a large scale, Separation of metal antimony and zinc sulfide concentrate, and clean, low energy consumption, low carbon, to meet the requirements of industrial production

Method used

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  • Method for treating antimony sulfide concentrate through sulfide phase reductive transformation-ore dressing

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Experimental program
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Effect test

Embodiment 1

[0029] The composition (wt.%) of the gold-containing antimony sulfide concentrate as the test raw material is: Sb37.21, Fe13.27, S30.60, Cu0.085, Pb0.18, Bi 0.026, As0.034, SiO 2 7.14、Al 2 o 3 2.26, CaO0.079, Au 56.6g / t; the composition (wt.%) of sulfur-fixing zinc oxide is: Zn74.06, Fe0.076, As0.84, Cu0.011, Pb0.81, F0.44 , Cl0.38, SiO 2 0.5, CaO0.016; the chemical composition (wt.%) of reduced coal powder is: C82.33, S3.01, SiO 2 6.66, CaO0.83, Al 2 o 3 4.81, MgO0.23. Weigh 100g of antimony sulfide concentrate, 65g of zinc oxide soot, and 6g of coal powder with the above ingredients, mix them evenly, put them into a graphite crucible, put them in an electric furnace at 850°C for 2.0h, and obtain a phase inversion product after cooling 154g, its main chemical composition (wt.%) is: Sb24.16, Fe8.62, S19.87, Zn31.26, Pb0.35, F0.013, Cl0.029. The removal rates of fluorine and chlorine are 93% and 80%, respectively. XRD and phase analysis show that the antimony phase is m...

Embodiment 2

[0031] The composition (wt.%) of antimony ore as test raw material is: Sb55.55, S22.51, Fe0.55, SiO 2 21.31, Pb0.01, As0.02, CaO1.52, Al 2 o 3 0.40, Au0.40g / t.

[0032] Weigh 100g of antimony sulfide concentrate of the above composition, 65g of secondary zinc oxide soot and 8g of coal powder in Example 1, mix them evenly, put them into a graphite crucible, put them into an electric furnace and react at 875°C for 1.0h, and obtain a phase after cooling. The conversion product was 153g, and its main chemical components (wt.%) were: Sb36.31, S14.71, Zn31.46, Pb0.34, F0.0093, Cl0.019. The removal rates of fluorine and chlorine are 95% and 88%, respectively. XRD and phase analysis show that the antimony phase is mainly metallic antimony, accounting for 96.35% of the total antimony, and the main phase of zinc is ZnS, accounting for 95.45% of the total zinc.

Embodiment 3

[0034]The composition (wt.%) of antimony ore as test raw material is: Sb48.15, S21.82, Fe2.46, SiO 2 16.94, Pb0.085, Zn0.018, As0.02, CaO0.69, Al 2 o 3 2.16, Au0.31g / t.

[0035] Weigh 100g of antimony sulfide concentrate of the above composition, 60g of secondary zinc oxide soot and 10g of coal powder in Example 1, mix them uniformly, put them into a graphite crucible, put them into an electric furnace and react at 900°C for 45min, and obtain phase inversion after cooling Product 148g, its main chemical composition (wt.%) is: Sb32.53, S14.74, Zn30.00, Fe1.66, Pb0.38, F0.0054, Cl0.012. The removal rates of fluorine and chlorine are 97% and 92%, respectively. XRD and phase analysis show that the antimony phase is mainly metallic antimony, accounting for 97.25% of the total antimony, and the main phase of zinc is ZnS, accounting for 95.32% of the total zinc.

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Abstract

The invention discloses a method for treating antimony sulfide concentrate through sulfide phase reductive transformation-ore dressing. According to the method, antimony sulfide concentrate and secondary zinc oxide undergo reductive transformation at a temperature no more than 950 DEG C so as to produce reductive transformation products--metallic antimony and zinc sulfide; and the reductive transformation products undergo reselection and flotation so as to separate metallic antimony from the antimony sulfide concentrate. The method has the characteristics of cleanness, low temperature and low carbon, eliminates a great amount of low-concentration SO2 flue gas pollution in traditional antimony pyrometallurgical smelting process, shortens antimony smelting flow, and greatly reduces energy consumption and improves economic benefit; the method can realize continuous production by using continuously-operating large-size conventional equipment like a rotary kiln and a multi-hearth furnace, and is capable of passingly treating secondary zinc oxide with high fluorine and chlorine contents so as to allow secondary zinc oxide to become high-quality zinc sulfide concentrate which is two times higher in price.

Description

technical field [0001] The invention relates to a method for treating antimony sulfide concentrate by a sulfide phase reduction transformation-mineralization method, which belongs to the field of nonferrous metal metallurgy. Background technique [0002] Due to the special properties of antimony compounds, oxygen-enriched molten pool smelting has not been adopted so far, so the main smelting method of antimony is still the blast furnace volatilization smelting that has been used for more than 50 years. This process has strong adaptability to raw materials and is suitable for processing High-grade antimony concentrate, high direct antimony recovery rate, relatively pure antimony oxide and large production capacity, but there is a large amount of low-concentration SO 2 The disadvantages of flue gas pollution, high energy consumption, large amount of dust, and huge dust collection system are obvious. This process is no longer suitable for the current requirements and must be re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B5/10C22B30/02
Inventor 唐朝波唐谟堂叶龙刚陈永明杨声海杨建广何静
Owner CENT SOUTH UNIV
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