Lead melting copper removal refining process for industrial frequency coreless-type electric induction furnace

An induction furnace, copper refining technology, applied in the direction of photography technology, photography auxiliary technology, process efficiency improvement, etc., can solve problems such as difficulty in manufacturing lead pots, poor temperature control accuracy, and flue gas pollution to the environment. The effect of good operation, fast lead melting speed and low energy consumption index

Active Publication Date: 2014-01-29
SHAANXI ZINC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are disadvantages in the practical application of the conventional traditional lead-melting and copper-removing technology: the key equipment used, the lead crucible, is difficult to manufacture, and trachoma and pores are easy to cause lead liquid leakage; the crucible is heated by the flue gas after fuel combustion, Heating is uneven, lead crucible life is short; temperature control accuracy is poor, operation is difficult; lead crucible heat transfer mode is only heat conduction, heat energy utilization rate is low, and production cost is high; sulfur combustion produces smoke and fuel combustion produces smoke when sulfur is added and copper is removed air pollution environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Send 50 tons of by-product coarse lead raw materials produced after the electric zinc smelting process into the heat-resistant steel (Cr-Mn-N) lead-melting crucible made by the automatic submerged arc welding process of beveling, and use A 600kw50t power frequency centerless induction furnace is used for heating and melting, the melting temperature is 460°C, and the melting time is 4 hours, then continue heating to heat the melt to 530°C. reduce the temperature from 530°C to 330°C), use the principle that the solubility of copper in lead decreases sharply with the decrease of temperature, so that copper is smelted out from crude lead, and 50 kg of sawdust is mixed into the metal liquid to make The copper is better separated from the lead liquid, the copper dross is removed by scooping, the copper dross is sent to the converter for reduction smelting, and the crude lead after reduction smelting is sent to the lead melting crucible.

[0017] 2. Adjust the temperature o...

Embodiment 2

[0021] 1. Send 50 tons of by-product coarse lead raw materials produced after the electric zinc smelting process into the heat-resistant steel (Cr-Mn-N) lead-melting crucible made by the automatic submerged arc welding process of beveling, and use A 600kw50t power frequency centerless induction furnace is used for heating and melting, the melting temperature is 460°C, and the melting time is 4 hours, then continue heating to heat the melt to 530°C. reduce the temperature from 530°C to 330°C), use the principle that the solubility of copper in lead decreases sharply with the decrease of temperature, so that copper is smelted out from crude lead, and 50 kg of sawdust is mixed into the metal liquid to make The copper is better separated from the lead liquid, and the copper dross is removed by scooping. The copper dross is sent to the converter for reduction smelting, and the crude lead after reduction smelting is sent to the lead melting crucible.

[0022] 2. Adjust the temperatu...

Embodiment 3

[0026] 1. Feed the purchased 50 tons of crude lead into the lead-melting crucible made of heat-resistant steel (Cr-Mn-N) welded by the groove automatic submerged arc welding process, and use a 600kw50t power frequency centerless induction Heat and melt in an electric furnace, the melting temperature is 480°C, and the melting time is 4 hours, then continue heating to heat the melt to 530°C, and then use the residual lead to continue the pot and spray water to cool down (in half an hour, the temperature is reduced from 530°C to 530°C). ℃ to 330-340 ℃), using the principle that the solubility of copper in lead decreases sharply with the decrease of temperature, the copper is smelted out from the crude lead, and 50 (kg) sawdust is mixed in the smelted metal liquid, The copper is separated from the smelt, the copper scum is removed, the copper scum is sent to the converter for reduction smelting, and the crude lead after reduction smelting is sent to the lead melting crucible to ent...

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PUM

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Abstract

The invention relates to a lead melting copper removal refining process for an industrial frequency coreless-type electric induction furnace. The process comprises the following steps: heating and melting a lead bullion raw material through the industrial frequency coreless-type electric induction furnace, pressing slag, and performing quick cooling to liquate copper from lead bullion; injecting the lead bullion obtained after copper removal into an anode casting unit to cast an anode plate, putting a lead anode plate into an electrolytic tank, applying direct current, and liquating anode lead on a cathode after the anode lead forms lead ions and enters an electrolyte; melting the liquated lead through the industrial frequency coreless-type electric induction furnace, sequentially performing oxidation refining and alkaline refining, dredging the slag, and then injecting a lead solution into a pouring unit to obtain an electrolytic lead ingot and oxidized slag; pumping the lead solution after slag dredging into a cathode sheet unit to enable a lead-solution-adhered roller to rotate so as to obtain a cathode lead sheet. The lead melting copper removal refining process for the industrial frequency coreless-type electric induction furnace is respectively applied to the working procedures such as lead melting copper removal, liquated lead refining ingot casting and cathode sheet manufacturing with electric energy, which is conveniently and easily obtained, through the industrial frequency coreless-type electric induction furnace, and has the advantages of reasonable process, low equipment investment, low energy consumption, great economic benefit, good environment-friendly effect and the like.

Description

technical field [0001] The invention belongs to the technical field of mineral production, processing and comprehensive utilization, and relates to a refining process for melting lead and removing copper in a power-frequency centerless induction electric furnace used in zinc smelting production. Background technique [0002] The zinc smelting industry is an industry with many by-products and waste residues, serious waste of resources and serious environmental pollution. With the adjustment of the national non-ferrous metal industry policy, it is necessary to carry out research and development of key technologies for the development of the circular economy of enterprises, and make full use of the wet process Zinc smelting solid waste resources, maximum recovery of valuable elements, development of circular economy, construction of resource-saving and environment-friendly enterprises, improve economic efficiency of enterprises. [0003] The by-product waste slag produced in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/06C25C1/18
CPCY02P10/20
Inventor 何学斌王正民陈超初阳冀春生周玺王康柱王彦良牛勤学李珍珠姚强张善灵寇文利张红菊刘成宗侯剑聂翠云王红军崔晓阳王军
Owner SHAANXI ZINC IND
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