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Comprehensive recovery technique of zinc vertical retorting residue

A technology for smelting zinc and vertical cans, applied in the field of comprehensive recycling of non-ferrous metal smelting, can solve the problems of short furnace life, many equipment, long process, etc., and achieve the effect of saving production cost, simple process and optimized combination.

Inactive Publication Date: 2003-12-10
中冶葫芦岛有色金属集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

c. The application of another product, steam, to power generation is restricted
Due to the long process and many equipments of the process, the failure rate is high
In particular, the life of the refractory bricks of the vortex furnace body is not ideal, the life of the furnace body is short, the furnace operating rate is not high, and it cannot adapt to the power generation of high-power steam turbines. In practice, these steams can only be used for industrial heating and heating. The application in power generation Limited to use on small steam turbines
d. High investment in fixed assets

Method used

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  • Comprehensive recovery technique of zinc vertical retorting residue
  • Comprehensive recovery technique of zinc vertical retorting residue
  • Comprehensive recovery technique of zinc vertical retorting residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The process flow of comprehensive recovery of zinc smelting residues in vertical tanks is attached image 3 .

[0023] Zn

Pb

Ag(g / t)

C

S

Fe

SiO 2

Calorific value (KJ / Kg)

1-6％

1％

140

30％

3.8％

20％

10％

15000

[0024] The vertical tank zinc smelting residue contains 1% zinc (Zn1%). Recycled P·S converter slag contains 5% Cu, 1.6% Zn, 0.3% Pb,

[0025] Fe45.9%, SiO 2 26.9%. Flux quartz containing SiO 2 85%, limestone contains Ca50%. The copper concentrate contains 23% Cu, 3% Zn, 26.5% S, and 2% Pb.

[0026] 1. Ingredients, vertical tank zinc smelting residue, copper concentrate, limestone, quartz stone, and converter slag are stored in their own feeding bins, and each bin is equipped with a weight-controlled feeder to adjust the discharge speed. The ingredients: vertical Can smelting zinc residue, copper concentrate, limestone, quartz stone, and converter slag ac...

Embodiment 2

[0030] The difference between Example 2 and Example 1 is: the vertical tank zinc smelting residue contains 6% zinc, and the flow rate of the spray gun during smelting: air 32700Nm 3 / h, enriched oxygen 11300Nm 3 / h, smoke discharge 54500Nm 3 / h. Its temperature is 1210°C, and the dust content of the flue gas enriched with lead and zinc is 45g / Nm 3 , soot contains 39.1% lead, 16.3% zinc, and the others are the same.

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Abstract

The vertical tank zinc-smelting bottom, copper concentrate and slag-making agent of quartzite, lime stone and vessel slag are mixed, and added from top and sprayed to immerse meltnig bath of smelting-furnace, at the same time the oxygen gas and air are injected by means of spray gun, and then reacted at 1150-1250 deg.C so as to produce matte and discarded slag. The reaction heat required for smelting copper can be provided by carbon contained in the vertical tank zinc-smelting bottom, the other heat can be recovered in the boiler for power generation, the contained silver is enriched in the matte, and the contained lead and zinc are enriched in the smoke and dust of smelting furnace, the silver can be recovered in the copper-smelting next procedure.

Description

(1) Technical field [0001] The invention relates to a comprehensive recycling technology for smelting nonferrous metals, in particular to a technology for treating zinc smelting residues in vertical tanks by using the top-spraying submerged molten pool smelting copper smelting technology. (2) Background technology [0002] There are two main types of existing zinc smelting production: pyrometallurgy and hydrometallurgy. Vertical tank smelting is one of the methods of pyrometallurgy. This method produces a large amount of residue, and there is no economical and reasonable treatment method at present. The residue contains about 30% fixed carbon, as well as various valuable non-ferrous metals such as zinc, lead, silver, etc. If these residues cannot be effectively recycled, it will not only cause a lot of waste of energy, but also waste rare and precious metal resources. What's more serious is that the discarded residue contains a large amount of heavy metal ions, which will in...

Claims

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Application Information

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IPC IPC(8): C22B7/04
Inventor 郭天立潘恒礼魏凤华侯宝泉郭亚会
Owner 中冶葫芦岛有色金属集团有限公司
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