Direct lead smelting method in molten pool and its device

A technology for molten pool smelting and lead smelting, which is applied in the field of lead smelting, can solve the problems of poor environment, low heat utilization rate and high energy consumption, and achieves the effects of low smoke and dust rate, improved heat utilization rate, and improved reduction degree.

Active Publication Date: 2007-12-12
HENAN YUGUANG GOLD & LEAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of high energy consumption, low heat utilization rate and poor environment in the current lead

Method used

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  • Direct lead smelting method in molten pool and its device
  • Direct lead smelting method in molten pool and its device

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Experimental program
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Embodiment 1

[0038] In this embodiment, the composition of the high-lead slag entering the bottom-blown molten pool reduction furnace is as follows: PbO: 50%, FeO: 12% SiO 2 : 10%, CaO: 5%, ZnO: 7% Cu: 1%, S: 0.6%, As: 0.4%, Sb: 0.5%.

[0039] The high-lead slag melt produced by the molten pool smelting oxidation furnace flows into the bottom-blown molten pool reduction furnace through the chute, and carbon particles, stones and iron ore are added from the feeding port in the bottom-blown molten pool reduction furnace, and the particle size of the carbon particles is 10-70mm, the amount of carbon particles per ton of high-lead slag is 20-100Kg, the particle size range of stones and iron ore is required to be 2-5mm, and the amount meets Fe / SiO 2 =1~1.4 / 1, CaO / SiO 2 =0.4~0.7 / 1 range requirement. At the same time, oxygen and natural gas are supplied through the gas spray gun at the bottom or bottom side of the bottom-blown molten pool reduction furnace, and the oxygen consumption per ton of...

Embodiment 2

[0041] In the present embodiment, the composition of the high-lead slag entering the bottom-blown molten pool reduction furnace is as follows:

[0042] PbO: 50%, FeO: 12% SiO 2 : 10%, CaO: 5%, ZnO: 7% Cu: 1%, S: 0.6%, As: 0.4%, Sb: 0.5%.

[0043] The high-lead slag melt produced by the molten pool smelting furnace flows into the bottom-blown molten pool reduction furnace through the chute, and carbon particles, stones and iron ore are added from the feeding port in the bottom-blown molten pool reduction furnace, and the particle size of the carbon particles is 10 ~70mm, the amount of carbon particles per ton of high-lead slag is 0~100Kg, the particle size range of stones and iron ore is required to be 2~5mm, and the amount meets Fe / SiO 2 =1~1.4 / 1, CaO / SiO 2 =0.4~0.7 / 1 range requirement. At the same time, oxygen and gas are supplied through the gas spray gun at the bottom or bottom side of the bottom-blown molten pool reduction furnace, and the oxygen consumption per ton of ...

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Abstract

This invention relates to method for smelting lead by using molten pool directly and the device. It comprises the following steps: feeding the high-lead residue melt into bottom-blown molten pool by downspouting to deoxidize; providing melt with oxygen and natural gas or oxygen and gas from bottom or downside of the bottom-blown molten reduction furnace by using gas spray gun; adding carbon particles to reduction furnace from feed opening; the high-lead residue melt is transformed to crude lead, flue gas and final slag through reduction. The device comprises melting bath calcar, and the taphole of melting bath calcar is connected to the feed opening of bottom-blown molten reduction furnace through downspouting, the gas spray gun is installed on the bottom or downside of bottom-blown molten reduction furnace. The invention is characterized by low energy consumption, good work environment and saved investment.

Description

technical field [0001] The invention belongs to the technical field of lead smelting in the nonferrous metal smelting industry, and in particular relates to a method and a device for direct lead smelting in a molten pool used in the lead smelting process. Background technique [0002] At present, the lead smelting method of "oxygen bottom blowing smelting---blast furnace reduction", which represents the highest level of lead smelting in China, has been fully promoted in my country, which has significantly improved the lead smelting environment. However, with the continuous improvement of scientific and technological progress, the shortcomings of the "oxygen bottom blowing smelting - blast furnace reduction" lead smelting method have been paid more and more attention, and it is urgent to improve this process. This is mainly due to the limitation of the structure and process requirements of the blast furnace. The high-lead slag melt produced in the bottom-blown furnace must be...

Claims

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Application Information

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IPC IPC(8): C22B13/02C22B5/12C22B5/10
Inventor 杨安国王拥军赵传和陈会成李新战夏胜文胡明凯张和平张艳军王社民
Owner HENAN YUGUANG GOLD & LEAD
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