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Balancing lead smelting process for comprehensive resource utilization and device thereof

A balanced and lead-smelting technology, applied in photography technology, photography auxiliary technology, process efficiency improvement, etc., can solve the problem of no substantial progress in recycling, achieve the effect of reducing the amount of materials, preventing diffusion, and environmental protection

Inactive Publication Date: 2009-08-26
CHENZHOU YUTENG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the technical route is still based on lead and zinc smelting and recycling, there is no substantial progress in the recovery of valuable metals such as Au, Ag, Bi, Cu, In, and Sb.

Method used

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  • Balancing lead smelting process for comprehensive resource utilization and device thereof

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Embodiment Construction

[0024] The technical solution provided by the present invention will be explained in detail below in conjunction with the examples, but it is not intended to limit the protection scope of the claims of the present invention.

[0025] In the following examples, the lead raw material that adopts is lead concentrate, and its main component by total mass percentage is as follows:

[0026] Pb: 55%; S: 18%; SiO 2 : 6%; Fe: 11%; CaO: 3.5%; Bi: 0.62%; Zn: 1.7%; Cu: 1.6%;

[0027] as attached figure 1 As shown, the lead concentrate and CaO, SiO 2 After the ingredients are granulated, they are smelted in an oxygen bottom-blown furnace, and the temperature of the molten pool in the oxygen bottom-blown furnace is 1260°C to 1350°C. There are 3 oxygen injection inlets at the bottom of the smelting furnace, including O 2 98% (total volume percentage) of industrial oxygen is sprayed into the furnace through an oxygen lance, and the oxygen lance is protected by nitrogen and demineralized w...

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Abstract

The invention relates to a balancing lead smelting process for comprehensive resource utilization and a device thereof. The process comprises the following steps: granulating a raw material containing lead and a fluxing agent after proportioning, sending to an oxygen bottom-blown smelting furnace for smelting to produce primary crude lead, lead ash and flue gas of SO2; sending the flue gas of SO2 to a sulfuric acid system for acid making after recovering waste heat by a waste heat boiler and duct collection by a dust arrester installation; adjusting form of the lead ash and adding the lead ash to a blast furnace together with coking coal for reducing smelting to produce secondary and third crude lead; electrorefining the crude lead to obtain refined lead and anode slime, treating and recovering the anode slime to obtain lead, stibium, bismuth, gold and silver metals; and separating slag of the blast furnace from the crude lead and sending to a fuming furnace to recover zinc oxide, the lead, indium and germanium. A system for realizing the process comprises the oxygen bottom-blown smelting furnace, an oxygen lance, an electrically-heated settler, a slag casting device, the waste heat boiler with a vertical ascending segment of membrane wall structure, the blast furnace, the fuming furnace and a ventilating device. The process design and system improvement help realize balancing optimized recovery of Pb, Zn, Au, Ag, Bi, Cu, In, Sb and S elements.

Description

technical field [0001] The invention relates to a method for smelting nonferrous metals, in particular to a process and equipment for comprehensively utilizing resources and balancing lead smelting from lead concentrates containing multiple valuable metals. Background technique [0002] Lead concentrate contains Zn, Au, Ag, Bi, Cu, In, Sb and other valuable metals, as well as S. Traditional lead smelting processes include sintering pot-blast furnace process and sintering machine-blast furnace process. Among them, the SO produced during the sintering process of the sintering pot-blast furnace 2 The flue gas is completely emptied because it cannot be recycled, causing serious pollution to the atmospheric environment. At the same time, a large number of powder-returning operations in the sintering process cause low-altitude dispersion of lead fume and dust, resulting in environmental pollution of lead fume. In the sintering machine-blast furnace process, the flue gas produced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/00C22B1/14C22B13/06C22B5/10C25C1/18C22B7/00C22B11/00C22B30/02C22B30/06
CPCY02P10/20
Inventor 谢志刚蔡练兵朱明曹勇刘劲夫肖定荣杨建军范朝彬李兴科
Owner CHENZHOU YUTENG CHEM IND
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