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Method for oxygen-enriched side-blowing direct reduction smelting of anode mud

A technology of anode slime and lead anode slime, which is applied in the direction of improving process efficiency, etc., can solve problems such as difficult to achieve multi-parameter, multi-process, and effective control, and achieve the effects of reducing equipment investment, low energy consumption, and large processing capacity

Active Publication Date: 2012-10-17
河南金利金铅集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to realize the complete separation of valuable metals under oxygen-enriched conditions, it is difficult to achieve multi-parameter, multi-process, and effective control only by manual experience control. Only with the help of modern information and control technology can the process be subdivided and reduce Influenced by human factors, so that the enrichment and separation of valuable metals

Method used

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  • Method for oxygen-enriched side-blowing direct reduction smelting of anode mud

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] See attached figure 1 , figure 1 Be the structural representation of the side-blowing furnace that the present invention utilizes, among the figure 1 is a smoke outlet, 2 is a charging port, 3 is an air inlet, 4 is a heating device, 5 is a slag outlet, and 6 is a lead outlet.

[0027] The side-blowing furnace is a circular shaft furnace, the upper part of the side-blowing furnace is provided with a smoke outlet 1, the middle and upper part of the right side of the side-blowing furnace is provided with a feeding port 2 and an air inlet 3 in turn, and the lower part of the right side is provided with a heating device 4; A slag outlet 5 and a lead outlet 6 are provided at the middle and lower part on the left side of the side-blowing furnace.

[0028] The method for direct reduction smelting of oxygen-enriched side-blown anode slime of the present invention, the detailed steps of the method are as follows:

[0029] a. First, add the slagging agent soda ash and reducing...

Embodiment 2

[0032] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0033] In step a: the dry weight of the lead anode slime, the slagging agent soda ash and the reducing agent coke particles are added in a weight ratio of 100:6:10;

[0034] In step b: the mixed material obtained in step a is continuously added to the side blowing furnace at a speed of 9t / h from the feed port 2 of the side blowing furnace; the addition of oxygen-enriched gas is 230Nm 3 / h, the amount of gas added is 310Nm 3 / h; the temperature in the side-blowing furnace is controlled by the DSC system to be 1000°C.

Embodiment 3

[0035] Embodiment 3: basically the same as Embodiment 1, the difference is:

[0036] In step a: the dry weight of the lead anode slime, the slagging agent soda ash and the reducing agent coke particles are added in a weight ratio of 100:3:5;

[0037]In step b: the mixed material obtained in step a is continuously added to the side blowing furnace from the feed port 2 of the side blowing furnace at a speed of 7t / h; the addition of oxygen-enriched gas is 250Nm 3 / h, the amount of gas added is 330Nm 3 / h; the temperature in the side-blowing furnace is controlled by the DSC system to be 1200°C.

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Abstract

The invention discloses a method for oxygen-enriched side-blowing direct reduction smelting of anode mud. The method comprises the following steps of: firstly uniformly mixing a slagging agent and a reducing agent with lead anode mud, loading the material mixture into a side-blowing furnace, injecting an oxygen-enriched gas and coal gas into the side-blowing furnace to react with the material mixture, heating by using a heating device, and performing melting treatment, slagging formation and reduction reaction on the material mixture under a continuously heating condition, wherein easily-oxidized lead, arsenic and stibium in the lead anode mud react with the injected oxygen-enriched gas and slagging agent to generate slag; in the lead anode mud smelting process, the reducing agent is added to form a reducing atmosphere and arsenic and stibium in the anode mud are reduced in the reducing atmosphere to volatilize into smoke dust; the residual metals are reduced by the reducing agent to form a noble lead layer, the noble lead layer is further refined in a noble lead-silver separation furnace to produce coarse silver. The technical scheme provided by the invention can be used for continuously treating the lead anode mud and has the characteristics of low production cost, high treatment capacity, low energy consumption, high automation level and environmental friendliness.

Description

Technical field [0001] The present invention involves a method of treatment of anode mud, especially the method of directly restore the melting of anodonal mud to the oxygen -rich side mud. Background technique [0002] In recent years, with the development of oxygen -rich melting technology and the development of melting pond melting technology, the treatment process of theode mud fire method has been improved, and it is developing in the direction of large -scale, continuous and automated equipment in equipment. [0003] In terms of the anode mud restoration, foreign companies have more research, and domestic enterprises have relatively few research.For example, the Hitachi smelting plant is based on the metal conductivity and metallic melting of the anode mud. The melting method of the application of the applied electric furnace has the characteristics of low energy consumption, small flue gas volume, and light environmental pollution.The roasting-melting method of the Naojima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00
CPCY02P10/20
Inventor 成全明杨华锋黄宪涛
Owner 河南金利金铅集团有限公司