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Process for smelting tin-lead alloy by tin enriched slag reduction and reduction-smelting reflecting furnace

A technology of tin-lead alloy and tin slag, which is applied to the improvement of process efficiency, lighting and heating equipment, etc., can solve the problems of many processes, high production cost, and difficult to completely separate lead and tin, and achieve high heat utilization rate and low coal consumption. Low, good heat preservation effect

Inactive Publication Date: 2010-05-05
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the close symbiotic relationship between lead and tin, it is difficult to completely separate lead and tin after refining, and there are many operating procedures and high production costs.

Method used

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  • Process for smelting tin-lead alloy by tin enriched slag reduction and reduction-smelting reflecting furnace
  • Process for smelting tin-lead alloy by tin enriched slag reduction and reduction-smelting reflecting furnace
  • Process for smelting tin-lead alloy by tin enriched slag reduction and reduction-smelting reflecting furnace

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Experimental program
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Embodiment Construction

[0037] The present invention will be described in detail below with specific embodiments in conjunction with the accompanying drawings.

[0038] A tin-rich slag reduction smelting process for tin-lead alloys adopts discontinuous smelting operations and is carried out in batches; it includes ovens, batching, feeding, reduction smelting and tin-lead alloy slag discharge operations, see the attached figure 1 As shown, the specific steps are as follows:

[0039] ① Oven

[0040] The oven should be baked in strict accordance with the method of low fire first, then high fire, and slow heating. When the furnace temperature rises, the pull rod should be adjusted to make the tightness of the rebar sleeve fixing the refractory material on the surface of the furnace body suitable; baking 6~ After 10 hours, gradually lower the temperature of the furnace to normal temperature; at this time, also adjust the tie rods to make the tightness of the rebar cover for fixing the refractory material...

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Abstract

The invention relates to a process for smelting tin-lead alloy by tin enriched slag reduction and a reduction-smelting reflecting furnace, which belong to the technical field of smelting of tin-lead alloy. The process adopts discontinuous type smelting operation, is carried out by furnaces and comprises the operation processes of furnace baking, mixing, charging, reduction smelting and tin-lead alloy placing and slag discharging. The fuel of the reduction-smelting reflecting furnace is changed into bituminous coal from diesel oil, and an air pipe of the reduction-smelting reflecting furnace, which is connected between a blower and a furnace body, form an air preheating return stroke around the outer wall of a flue; a combustion chamber is added to a furnace body, and an inverted arch furnace bottom, a furnace wall and a furnace top above a furnace bottom packing layer in a hearth are rebuilt; a brick body of the slag line part is changed into a chrome-magnesite brick from a high-aluminum brick, the depth of a smelting pool is reduced to 280-460mm from 510mm, and the clearance height of the hearth is lowered to 600-1,000mm from 1,040mm. The invention smelts the tin enriched slag by the reduction-smelting reflecting furnace and obviously reduces cost.

Description

technical field [0001] The invention relates to a process for reducing and melting tin-lead alloys with rich tin slag, belonging to the technical field of tin-lead alloy smelting. The invention also relates to a reduction smelting reverberatory furnace for smelting tin-lead alloys. Background technique [0002] In addition to lead and zinc, lead-zinc concentrates also contain tin, antimony, copper, tin, gold, silver and other non-ferrous metals. These metals will be enriched in the smelting slag during the smelting process. Considering resource utilization and enterprise benefits , it is necessary to carry out comprehensive recovery of associated metals. When using pyrotechnics to smelt lead and zinc, there is often a tin removal process in the crude lead refining treatment, and the tin slag produced during the crude lead refining and tin removal is the so-called rich tin slag in the present invention. In addition to containing higher lead, it also contains higher tin. Du...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B5/10C22C1/02C22C13/00C22C11/06C22C30/04F27B3/02F27B3/10F27B3/12F27B3/18F27B3/19
CPCY02P10/20
Inventor 张圣南陈朴曹永贵曹永德
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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