Method for comprehensively efficiently processing lead anode slime by using top-blown converter

A technology of lead anode slime and top-blown furnace, applied in the direction of improving process efficiency, etc., can solve the problems of low gold and silver enrichment, low metal recovery rate, and non-continuous completion, so as to increase production income and low process slag production rate , Good restoration effect

Active Publication Date: 2013-11-20
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process has segmental operations, and the processes such as feeding, precious lead, and slag cannot be completed continuously, the operation is difficult, and the problems such as short furnace life have not been completely resolved.
In recent years, my country has researched and devel

Method used

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  • Method for comprehensively efficiently processing lead anode slime by using top-blown converter

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Experimental program
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Effect test

Embodiment 1

[0040] A. Na 2 CO 3 The slagging agent soda ash with a content of 98.5%, the return material, the reducing agent coke and lead anode slime are mixed uniformly in a weight ratio of 100:5:25:5 to obtain a mixed material; The speed of h is continuously added to the top-blowing furnace, and the oxygen-enriched air and natural gas are sprayed into the top-blowing furnace molten pool through the top lance of the top-blowing furnace to react with the mixed materials. The amount of oxygen-enriched air and natural gas added is 12500Nm 3 / h, where the amount of natural gas added is 300Nm 3 / h, control the temperature in the top-blowing furnace to 1050°C, when the thickness of the slag layer reaches 0.5-1.0m, it will be released intermittently from the slag outlet of the top-blowing furnace, and flow into the mold through the chute to cast ingots; the lead anode slime Elements such as lead, arsenic, and antimony are reduced and gold and silver are captured and then sink to form a noble ...

Embodiment 2

[0043] A. GaF 2 The fluorite with a content of 97%, the return material, the reducing agent pulverized coal and the lead anode slime are mixed uniformly in a weight ratio of 100:8:20:6 to obtain a mixed material;

[0044] B, the mixed material in the step A is continuously added in the top-blowing furnace with a speed of 15t / h from the feed port of the top-blowing furnace, and oxygen-enriched air and diesel oil are sprayed into the top-blowing furnace molten pool by the special lance of the top-blowing furnace, The amount of oxygen-enriched air added is 12000Nm 3 / h, the amount of diesel oil added is 400L / h, and the temperature in the top-blowing furnace is controlled at 1100°C. When the thickness of the slag layer reaches 0.5-1.0m, it is released intermittently from the slag outlet of the top-blowing furnace and flows into the mold through the chute Internal ingot casting; elements such as lead, arsenic, and antimony in the lead anode slime are reduced and gold and silver ar...

Embodiment 3

[0047] A. Na 2 CO 3 The slagging agent soda ash with a content of 98.8%, the return material, the reducing agent anthracite and the lead anode slime are mixed uniformly in a weight ratio of 100:1:50:1 to obtain a mixed material; The speed is continuously added to the top-blowing furnace, and the oxygen-enriched air and gas are sprayed into the top-blowing furnace molten pool through the top lance of the top-blowing furnace to react with the mixed materials. The amount of oxygen-enriched air and gas added is 10800Nm 3 / h, where the amount of natural gas added is 259Nm 3 / h, control the temperature inside the top-blowing furnace to 900°C, and when the thickness of the slag layer reaches 0.5-1.0m, it will be discharged intermittently from the slag outlet of the top-blowing furnace, and flow into the mold through the chute to cast ingots; the lead anode slime Elements such as lead, arsenic, and antimony are reduced and gold and silver are captured and then sink to form a noble l...

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Abstract

The invention discloses a method for comprehensively efficiently processing lead anode slime by using a top-blown converter. The method comprises processes of preparation of a mixed material, first reduction smelting, reduction for gold catching, secondary converting, and recovering of arsenic and antimony. The method specifically comprises: uniformly mixing lead anode slime according to dry weight, a slagging flux, a recycled material and a reducing agent to form the mixed material; spraying a fuel accounting for 1-10% by weight of the material into the molten pool of the top-blown converter, controlling melting temperature of the top-blown converter at 900 DEG C-1200 DEG C, after a complete reaction, discharging a slag layer formed by floating upward through a discharge outlet for recovery processing, wherein lead reduced by the reducing agent catches gold and silver and forms an expensive lead layer; performing further strengthening converting on the expensive lead layer, discharging through the discharge outlet for continuous refining; and cooling and dedusting the high-temperature flue dust via a waste-heat reclamation device to obtain an arsenic antimony flue dust. The method of the invention has the advantages of a show flow, low gold content and silver content in the slag, a long service life of the converter, substantial economical benefit, large processing amount, strong raw-material adaptability, high automation level, environmental protection, safe and the like.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy smelting, and in particular relates to a method for comprehensively and efficiently treating lead anode slime by using a top-blown furnace. Background technique [0002] Lead anode slime mainly contains gold, silver, bismuth, lead, copper, arsenic, antimony and other metal elements. At present, there are basically three methods for the treatment of lead anode slime: one is the pyrotechnic process; the other is the all-wet process; the third is the combined pyro-wet process. The wet process has a large consumption of reagents, serious equipment corrosion, heavy maintenance workload, complicated waste liquid treatment process, low labor productivity, high production cost, and lengthy process, which is only suitable for small-scale production; the combined fire-wet process has high costs, There is a large amount of waste water, and it is difficult to recycle waste gas, and the drying a...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B5/02C22B13/02C22B11/00C22B15/00C22B30/06C22B30/04C22B30/02
CPCY02P10/20
Inventor 包崇军张永平陈科彤吴红林闫森李怀仁和晓才李永佳徐亚飞施辉献许娜李小英于站良李俊李永刚翟忠标刘俊场张徽张薇
Owner KUNMING METALLURGY INST
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