Novel process for cooling of pyrogenic process zinc smelting

Abstract

The present invention relates to a novel cooling art for the zinc-smelting with the pyrogenic process. The novel cooling art is characterized in that zinc steam in an electric furnace passes through a plurality of black lead rotors having independent cooling ponds, different cooling ponds are controlled to provide different working temperature. By arranging with three rotor independent recovery cooling chambers and controlling the cooling temperature of different cooling chambers, the present invention realizes the respective recovery of the metal such as plumbum, zincum, cadmium, and argentum, thereby improving the production quality and the yield, and increasing greatly the added value of the product and the profit margin of the corporation. The art can recover and enrich the metal such as plumbum, zincum, cadmium, argentums, and indium on the basis that any energy sources are not increased. Compared with the present rectifying art in the zincum and plumbum and cadmium metallurgy column with the pyrogenic process, one ton of zincum can save about over 600 RMB of fuel bills, and about 500 RMB of the manpower secondary processing damage, the two are added, one ton of zincum can save over 1100 RMB of the production cost; however, the production cost of one ton of zincum of adding additionally one rotor only has tens RMB.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal preparation, and in particular relates to a new pyrometallurgy cooling process. Background technique [0002] The existing pyro-method zinc smelting includes primary cooling and secondary cooling. The primary cooling uses graphite rotors to lift zinc liquid to cool zinc vapor. This solution has high condensation efficiency and simple equipment, and is favored by all major factories. use. However, due to this scheme, the two rotors are placed in a zinc pool to jointly recover the metals in the zinc vapor, resulting in the inability to separate metals such as lead and zinc, and the product contains a lot of lead and impurities, especially because of the high smelting temperature of the electric furnace zinc smelting, the product quality is very poor It is difficult to reach the national No. 5 zinc standard, so the product quality is poor, and the zinc ingots produced must undergo secondary...

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Problems solved by technology

However, due to this scheme, the two rotors are placed in a zinc pool to jointly recover the metals in the zinc vapor, resulting in the inability to separate metals such as lead and zinc, and the product contains a lot of lead and impurities, especially because of the high smelting temperature of the electric furnace zinc smelting, the product quality is very poor It is difficult to meet the national No. 5 zinc standard, so the product quality is poor, and the zinc ingots produced must undergo secondary processing before they can be sold, and the overall benefit is low

The secondary cooling adopts two-stage washing and two-stage 6 Venturi tubes to extract steam. This method 1. It is very easy to block the dry blue powder box, causing the furnace to flush; 2. The suction is not enough, resulting in a small negative pressure in the furnace body; Low efficiency, high zinc and cadmium content in tail gas emission, large loss

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