Oxygen-enriched molten pool antimony refining production process

A production process and oxygen-enriched technology, applied in the direction of process efficiency improvement, etc., can solve problems such as inability to configure sulfuric acid, large proportion of returned materials, and dispersion of flue gas, so as to avoid SO2 flue gas escape and reduce flue gas emissions , The effect of reducing exhaust pollution

Inactive Publication Date: 2017-03-22
河池市生富冶炼有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Roasting, sintering machines, and blast furnaces produce low-concentration SO 2 Flue gas, not only cannot be equipped with a conventional acid plant to produce sulfuric acid, but also must be discharged after desulfurization treatment
[0006] (2) The process is long, there are many intermediate links, and the sintering process requires a relatively large ratio of returned materials and reciprocation, resulting in low production efficiency, many intermediate products, and low metal recovery rate
[0007] (3) Compared with the use of oxygen-enriched and high-temperature intensified smelting, there is a big gap in production efficiency, unit product production cost, and investment return.
[00

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0040] A production technique for smelting antimony in an oxygen-enriched molten pool, comprising the steps of:

[0041] (1) Ingredients: Mix and stir the brittle sulfur-lead-antimony concentrate, quartz sand and limestone powder according to the mass ratio of 100:20:25 to obtain the mixture;

[0042] (2) Granulation: the uniformly stirred mixture is made into pellets with a particle size of 12-15mm, and the water content of the pellets is 5-8%;

[0043] (3) Oxidation smelting: Send the prepared pellets into an oxygen-enriched oxidation furnace with oxygen-enriched air side-blowing for oxidation smelting, wherein the volume concentration of oxygen-enriched air is 88 to 92%, and the pressure in the oxygen-enriched oxidation furnace is - 0.05-0.05MPa, the melting temperature is 980-1000°C, and the melting time is 40-50min. After smelting, an antimony-lead alloy and liquid high-antimony slag are produced, and the antimony-lead alloy is cast out after ingot casting;

[0044] (4) ...

Embodiment 2

[0050] A production technique for smelting antimony in an oxygen-enriched molten pool, comprising the steps of:

[0051] (1) Ingredients: mix and stir the antimony sulfide concentrate, quartz sand and limestone powder according to the mass ratio of 100:30:15 to obtain the mixture;

[0052] (2) Granulation: the uniformly stirred mixture is made into pellets with a particle size of 15-20mm, and the water content of the pellets is 8-10%;

[0053] (3) Oxidation smelting: send the prepared pellets into an oxygen-enriched oxidation furnace with oxygen-enriched air bottom blowing for oxidation smelting, wherein the volume concentration of oxygen-enriched air is 88-92%, and the pressure in the oxygen-enriched oxidation furnace is - 0.1~0.05MPa, the oxidation temperature (also called smelting temperature) is 950-990℃, the oxidation time (also called smelting time) is 40-50min, after smelting, a crude antimony and liquid high-antimony slag are produced, and the primary antimony is elect...

Embodiment 3

[0060] In the embodiment of the present invention, except that antimony concentrate is used instead of brittle sulfur-lead-antimony concentrate in the raw materials of the batching step, and the mass ratio of antimony concentrate, quartz sand and limestone powder is 100:25:20, the others are the same as those in the embodiment. 1 is the same.

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PUM

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Abstract

The invention discloses an oxygen-enriched molten pool antimony refining production process, and belongs to the field of smelting of nonferrous metal. The process comprises the following steps: 1) batching: raw materials are uniformly mixed according to a mass ratio to obtain a mixture; 2) granulation: the uniformly mixed mixture is prepared as spherulites; 3) the prepared spherulites are fed in an oxygen-enriched oxidation furnace for oxidation smelting to prepare a primary high-temperature melt and liquid-state high-antimony ore slag; 4) reduction smelting: the liquid-state high-antimony ore slag flows in an oxygen-enriched reducing furnace for reduction smelting to prepare a secondary high-temperature melt and reducing furnace slag; 5) metal recovery: the reducing furnace slag flows in a fuming furnace through a slag chute; and recovery includes valuable metal; and 6) the smoke is recovered. The process effectively increases the SO2 concentration in smelted smoke to achieve conventional acid preparation system requirements, reduces the pollution, meanwhile, increases the yield, and reduces the energy consumption.

Description

[0001] 【Technical field】 [0002] The invention relates to a nonferrous metal smelting process, in particular to a production process for smelting antimony in an oxygen-enriched molten pool. [0003] 【Background technique】 [0004] For the treatment of brittle sulfur-lead-antimony ore, the current smelting process is: antimony-lead concentrate → boiling roasting → sintering disc sintering → blast furnace reduction → crude antimony-lead alloy. The process flow is as follows: the brittle sulfur-antimony-lead concentrate is roasted and desulfurized in a fluidized fluidized furnace, and the calcined sand is mixed with the brittle sulfur-antimony-lead concentrate, returned material, quartz sand, limestone powder, and anthracite, and sintered with a sintering plate, and then the sintered block is Blast furnace reduction smelting produces antimony-lead alloy. However, the defects and deficiencies of the traditional smelting process mainly include: [0005] (1) Roasting, sintering ma...

Claims

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Application Information

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IPC IPC(8): C22B30/02C22B5/02C22B7/04C22B19/30C22B11/02C22B13/02
CPCC22B5/02C22B7/04C22B11/023C22B13/025C22B19/30C22B30/02Y02P10/20
Inventor 韦竣严曹应科
Owner 河池市生富冶炼有限责任公司
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