Smelting method of lead concentrate containing antimony and zinc

A smelting method and concentrate technology, which is applied in the field of smelting complex lead concentrates containing antimony and zinc, can solve the problems of inability to recover valuable metals at one time, low labor productivity, and difficulty in flue gas treatment, and achieve large production capacity and adaptable materials The effect of strong resistance and high SO2 concentration in flue gas

Inactive Publication Date: 2012-05-02
BEIJING GENERAL RES INST OF MINING & METALLURGY
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AI Technical Summary

Problems solved by technology

Over the past 20 years, my country's antimony metallurgical industry has developed rapidly. At present, large and medium-sized antimony smelting plants in China basically adopt boiling roasting-sintering pan sintering-blast furnace reduction smelting or blast furnace volatilization smelting, reverberatory furnace reduction smelting and refining technologies, all of which have Insurmountable problems such as high energy consumption, serious environmental pollution and low labor productivity
However, the main disadvantages of the blast furnace process are: backward equipment, high energy consumption, poor furnace sealing, difficult flue gas treatment, and serious pollution
[0007] In summary, none of the current techniques can recover valuable metals such as antimony, zinc, and lead at one time, and the recovery rate is low.
However, in recent years, due to the increasingly tight energy sources, increasingly stringent requirements for environmental protection standards, and the gradual increase in labor prices, the traditional pyrometallurgical method has been forced to no longer meet the requirements of sustainable development for the non-ferrous smelting industry, and the development and use of antimony and lead smelting New technologies, new processes, and new equipment gradually replace traditional processes with high energy consumption, high pollution, and low benefits, and apply the future development direction of antimony and lead smelting

Method used

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  • Smelting method of lead concentrate containing antimony and zinc
  • Smelting method of lead concentrate containing antimony and zinc
  • Smelting method of lead concentrate containing antimony and zinc

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Experimental program
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Effect test

Embodiment 1

[0061] The treatment consists of a mixture containing 40% Pb, 15% Sb, 6% Zn, 25% S, and 2500 g / t Ag, with a water content of ~8.5%, and the particle size 2 Mass ratio is 1.3 and CaO:SiO 2 The mass ratio is 0.8, and it is fed through the slag furnace (1) feeding port (2), and at the same time, preheated air with a temperature of 550℃ is sprayed from the slag furnace (1) injection port (3) to perform self-heating full oxidation smelting , Keep the slag temperature at ~1050℃. It produces metal oxide slag with a temperature of ~1050℃ and SO2 flue gas containing S ~ 15%. The SO2-containing flue gas is discharged through the flue (4) of the reduction smelting electric furnace, and is used for waste heat. After dust collection, it is sent to the acid system. The smoke dust is received as the oxide soot containing 20% ​​lead and 60% antimony, and it is directly refined by removing lead and antimony.

[0062] The temperature produced by the slag furnace (1) is ~1050°C. The metal oxid...

Embodiment 2

[0064] The processing consists of a mixture containing 30% Pb, 25% Sb, 4% Zn, 19% S, and 3000g / t Ag. The water content is ~9.5%. 2 The mass ratio is 1.4 and CaO:SiO 2 The mass ratio is 0.7, and 5% of the crushed coke is mixed into it through the slag furnace (1) feeding port (2), and at the same time, the injection temperature of the slag furnace (1) (3) is 100 ℃, oxygen It is 30% preheated oxygen-rich gas for self-heating full oxidation smelting to maintain the slag temperature at ~1000°C. Produces metal oxide slag with a temperature of ~1000℃ and SO containing S ~ 10% 2 Smoke. Contains SO 2 The flue gas is discharged through the flue (4) of the reduction smelting electric furnace, is used for waste heat, and is sent to the acid system after dust collection and dust removal. The soot that is received is oxide soot containing lead to 16% and antimony to 65%, which is directly removed for refining.

[0065] The temperature produced by the slag furnace (1) is ~1000°C. The...

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Abstract

The invention relates to a nonferrous metal, and in particular relates to a smelting method of lead concentrate containing antimony and zinc. The smelting method is characterized in that in the smelting process, oxidizing smelting is performed to the lead concentrate containing antimony and zinc in a slagging furnace to generate a flue gas containing SO2, smelting dust and slagging furnace slag; then reduction smelting is performed to the slagging furnace slag in an electric furnace to generate a lead-antimony alloy, a flue gas and slag, and after the slag and the lead-antimony alloy are clarified and layered, the lead-antimony alloy is discharged from a lead discharge hole; and zinc oxide is recycled from the flue gas obtained in the reduction process and then the obtained flue gas is discharged to the outside. The method has the following advantages: the flow is short, continuous production is realized, energy is saved, the production capacity is large, resources can be efficiently utilized, the environment can be protected, the safety and labor hygiene are good, foamed slag has no explosion danger and the production is safe. The smelting method is suitable for not only the treatment of the complex lead materials containing antimony and zinc, but also the treatment of wet method zinc metallurgical slag and lead-precious metal system slag, lead, zinc and antimony are matched mutually, the lead-zinc-antimony combination enterprises are more superior and the recovery rates of lead and the associated valuable metals such as copper and antimony, and precious metals are higher.

Description

Technical field [0001] A smelting method of antimony-containing zinc-lead concentrate relates to a non-ferrous metal, especially a smelting method of complex antimony-containing zinc lead concentrate. technical background [0002] Lead is an important basic raw material for the development of the national economy. China is the world’s largest lead producer and the second lead consumer after the United States. Lead smelting methods can be simply summarized into two categories: traditional methods and direct lead smelting methods. The traditional method is the sintering-blast furnace smelting method (including sintering machine, sintering pot, sintering pan, etc.); the direct lead smelting method eliminates the sintering process of lead sulfide concentrate, and the raw concentrate is directly smelted into the furnace. The traditional sintering-blast furnace smelting method has been the main production method of lead for many years. Even now, its output still accounts for more than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/00C22B19/00C22B30/02
CPCY02P10/20
Inventor 王成彦郜伟尹飞陈永强梁德华崔成旺李强邢鹏杨永强王军居中军揭晓武张永禄
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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