Lead skim reducing furnace

Abstract

The invention discloses a lead skim reducing furnace. The lead skim reducing furnace comprises a furnace body, a support for supporting the furnace body, a powder coal spray gun and an electrode, wherein the furnace body confines a hearth and is provided with a charging hole, a lead discharging hole, a slag tap, a vent nozzle, an electrode jack, a smoke outlet and a powder coal spray gun jack, the electrode jack and the flue outlet are arranged on the top of the furnace body, and the powder coal spray gun jack is arranged on the bottom of the furnace body; the powder coal spray gun is inserted into the powder coal spray gun jack for injecting power coal into the hearth; and the electrode is inserted into the hearth through the electrode jack to heat materials in the hearth. The reducing furnace of the invention has small needed powder coal amount, small smoke amount, low soot rate, high lead recovery rate and low cost.

Description

technical field [0001] The invention relates to a lead slag reduction furnace, in particular to a lead oxide slag reduction furnace. Background technique [0002] Traditional crude lead smelting processes mainly include QSL method, SKS method, Kivcet method, top-blown submerged bath smelting technology (mainly Ausmelt method and ISA method) and Kaldor method. QSL method, top-blown submerged bath smelting technology and Kaldor method are all one-step lead smelting methods. Lead sulfide concentrate is put into the furnace for oxidation and smelting, and part of crude lead and lead oxide slag are generated, and the lead oxide slag continues to be reduced in the furnace. Smelting produces crude lead and final slag. Both the QSL method and the Kaldor method have been applied in industry, but the soot rate in the reduction stage is as high as 30%-35%, causing a large amount of lead to circulate in the system, and the economic indicators are poor. The operation mode of Ausmelt wi...

AI Technical Summary

Problems solved by technology

This method is basically equivalent to the reduction section of the QSL method, except that the reducing agent is different. Although the problem of heat utilization of lead oxide slag is solved, a large amount of heat energy required for the reduction reaction in the furnace must be obtained by burning natural gas or coal gas.

Therefore, a large amount of natural gas or gas is required, and the price of natural gas and gas is relatively expensive, so the cost is high

In addition, the amount of flue gas produced is large, the dust rate is high, the direct recovery rate of lead is low, the recovery effect is poor, the heat taken away by the high-temperature flue gas is large, and the energy consumption increases accordingly. The infrastructure investment for recovering this part of waste heat is relatively high, resulting in waste

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