Rotary hearth furnace and method for treating lead and zinc smelting slag

A technology for rotary hearth furnace and smelting slag, applied in the field of metallurgy, can solve the problem that valuable elements cannot be comprehensively recovered, and achieve the effects of reducing equipment investment costs, improving economic benefits, and solving the problem of waste of valuable resources

Active Publication Date: 2016-06-15
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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Problems solved by technology

For this reason, an object of the present invention is to propose a kind of rotary hearth furnace and method for processing lead-zinc smelting slag, this rotary hearth furnace can solve the difficult problem that valuable elements in the lead-zinc smelting slag in the prior art cannot comprehensively recover, and can Realize that iron, lead, zinc, indium, sulfur and other valuable elements in the lead-zinc smelting slag are recovered in the same equipment

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  • Rotary hearth furnace and method for treating lead and zinc smelting slag
  • Rotary hearth furnace and method for treating lead and zinc smelting slag
  • Rotary hearth furnace and method for treating lead and zinc smelting slag

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Embodiment

[0085] The sulfate lead-zinc smelting slag has the following components: TFe26.27wt%, Pb2.59wt%, Zn10.36wt%, In0.03wt%, S7.26wt%. The ratio of lead-zinc smelting slag to other raw materials is lead-zinc smelting slag: reducing agent: binder = 100:18:5, the mixed raw materials are agglomerated, and the dried pellets enter the rotary hearth furnace for processing. The pellets pass through the feeding zone, preheating zone, decomposition zone, volatilization zone, reduction zone and discharge zone in turn. In the preheating zone, the crystallization water in the pellets is volatilized first. The temperature in the preheating zone is 600°C, and The burner is not set separately, but is heated by the radiant heat of the ordinary burner in the decomposition zone; in the decomposition zone, the sulfate in the pellet is decomposed into sulfide (sulfur dioxide and sulfur trioxide) and metal oxides (lead oxide, oxide Zinc, indium oxide and iron oxide, etc.), the area is equipped with a c...

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Abstract

The invention discloses a rotary hearth furnace and method for treating lead and zinc smelting slag. The rotary hearth furnace comprises a rotatable furnace bottom, an annular hearth, a first partition, a second partition, a third partition, a first heating unit and a second heating unit. A smelting space is defined in the annular hearth, and the smelting space is divided into a feeding area, a preheating area, a decomposing area, a volatizing area, a reducing area and a discharging area in sequence according to the entering areas of materials in the circumferential direction of the annular hearth. The first partition is arranged between the feeding area and the preheating area. The second partition is arranged between the volatizing area and the reducing area. The third partition is arranged between the reducing area and the discharging area. The first heating unit is arranged in the decomposing area. The second heating unit is arranged in the reducing area. The rotary hearth furnace can solve the problem that valuable elements in lead and zinc smelting slag in the prior art cannot be comprehensively recycled, and in addition, valuable elements such as iron, lead, zinc, indium and sulfur in the lead and zinc smelting slag can be recycled in the same device.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular, the invention relates to a rotary hearth furnace and a method for processing lead-zinc smelting slag. Background technique [0002] Lead and zinc are indispensable important metal materials in the process of national economic development, and are widely used in industrial production and human production. In recent years, lead and zinc smelting enterprises have developed rapidly, and China has become one of the most important lead and zinc producers in the world. [0003] The scale and number of lead-zinc smelting enterprises in my country have been expanding year by year, the output of lead-zinc has increased rapidly, and smelting technology has made great progress. However, the lead-zinc smelting process is complicated, and there are many links in which pollutants are produced. The rapid development of lead-zinc smelting has resulted in the generation of a large amount of was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B13/02C22B19/20C22B19/30C22B58/00
CPCC22B7/001C22B7/04Y02P10/20
Inventor 王敏古明远吴佩佩薛逊曹志成吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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