Smelting method and device of molten lead oxidation slag

A technology of lead oxide slag and smelting method, which is applied in the smelting of molten lead oxide slag, and realizes the device field of the smelting method, and achieves the effects of saving energy, reducing production equipment, and saving engineering investment

Active Publication Date: 2005-11-09
CHINA ENFI ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method and device for smelting molten lead oxide slag to solve the problems of utilizing the heat enthalpy of high-temperature molten slag, further improving the operating environment, and further saving energy and reducing consumption; at the same time, it also provide

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  • Smelting method and device of molten lead oxidation slag
  • Smelting method and device of molten lead oxidation slag
  • Smelting method and device of molten lead oxidation slag

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Embodiment 1

[0032] Embodiment one sees figure 1 , 2 , the specific method of smelting high-lead slag using a single side-blowing furnace includes the following process:

[0033] The furnace body adopted is a vertical side-blowing furnace, the interior of the furnace body is a melting pool 4, the furnace wall is a water jacket 5 or a membrane wall structure, the top of the upper furnace body 1 is provided with a smoke exhaust port 9, and the side wall of the upper furnace body 1 A lead oxide slag feed port 6 and a flux feed port 7 are respectively provided. The side wall of the lower furnace body 2 is provided with a nozzle inlet 8 and a slag discharge port 10. The bottom of the lower furnace body is connected to the bottom furnace body 3, and the inside of the bottom furnace body is an inverted arch. Bottom-shaped structure 11, the bottom is lined with refractory material, and a siphon lead outlet 13 is opened on the side wall.

[0034] Adopt the smelting method of above-mentioned side ...

Embodiment 2

[0038] Embodiment two see image 3 : a molten lead oxide slag smelting device and a common fuming furnace are connected in series, and the slag outlet 10 of the molten lead oxide slag smelting device is communicated with the hot slag inlet 17 of the common fuming furnace 15 with a chute 16 .

[0039] see Figure 4 , its molten lead oxide slag smelting method:

[0040] In the side blowing furnace, the reduction process of the first stage is the same as that of the first embodiment. The residual slag produced in the first stage is discharged from the slag discharge port of the furnace body, and enters the second side-blowing furnace for fuming blowing. The temperature of the molten pool is 1150-1300 °C; air and reducing agent pass through the nozzle inlet It is sprayed into the molten pool from the side of the furnace, and the oxygen concentration of the air blown in is 23%-40%; after the slag is fumed in the second stage, it produces flue gas and waste slag containing zinc ox...

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Abstract

An apparatus for smelting the oxide slags of molten lead is composed of the upper furnace body with water jacket-type or membrane-type side wall, smoke outlet, flux inlet and oxide slag inlet, the lower furnace body with water jacket-type wall, nozzle inlet and slag discharging outlet, and the furnace bottom with refractory liner and lead outlet. Its method includes reducing step and smoking step.

Description

(1) Technical field [0001] The invention relates to a method for smelting nonferrous metals, in particular to a method for smelting molten lead oxide slag (high-lead slag) and a device for realizing the smelting method. (2) Background technology [0002] The existing lead smelting technology adopts the oxygen bottom blowing smelting-blast furnace reduction lead smelting method, although it has solved the SO 2 The pollution of flue gas and lead dust, but the molten lead oxide slag (high lead slag) produced in the oxygen bottom-blown smelting process needs to be solidified and then sent to the blast furnace for reduction. The enthalpy of the high-temperature molten lead oxide slag (accounted for The required enthalpy is about 15%) and cannot be utilized; meanwhile, the blast furnace reduction needs to consume expensive massive metallurgical coke, and in the reduction process, about 30% of the coke is incompletely burned, which not only wastes energy, but also increases product...

Claims

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Application Information

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IPC IPC(8): C22B13/00
Inventor 王忠实张兆祥蒋继穆黄祥华李东波王建铭张振民王林生
Owner CHINA ENFI ENG CO LTD
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