Direct lead-smelting comprehensive metallurgical device and smelting process

Abstract

The invention relates to an energy-saving high-efficient direct lead-smelting comprehensive metallurgical device, which is formed by serially joining three melting bath smelting furnaces: a first furnace, a second furnace and a third furnace; and the second furnace consists of a furnace cylinder and a furnace body which is arranged on the furnace cylinder. The top part of the upper furnace body is provided with a smoke exhaust port and a standby feeding port; a charge feeding port and a slag feeding port are arranged above the lower furnace body; and the bottom part of the lower furnace body is provided with a slag siphonic water-collecting well. The furnace body is provided with three rows of supply-air outlets. The bottom part of the furnace cylinder is provided with a metal siphonic outlet. Due to the adoption of the direct lead-smelting comprehensive metallurgical device, the heat loss is small, the heat utilization rate is high, sulfuric dioxide smoke with high concentration can be produced, and the requirement for producing the acid can be more favorably satisfied; and molten high-lead thermal slag which is produced through oxidation and smelting directly flows into a reducing furnace, so the heat of the thermal molten slag can be adequately utilized. The land occupied area is small, the investment can be saved, the heat loss is less, the heat utilization rate is high, the heat energy can be adequately utilized, a great amount of energy consumption can be saved, output of smoke is small, the content of harmful ingredients in smoke is low, and the environmental pollution problem can be more effectively solved.

Description

technical field [0001] The invention relates to a nonferrous metal smelting reaction device and a smelting process thereof, in particular to an energy-saving and efficient direct lead smelting comprehensive metallurgical device and a smelting process thereof. Background technique [0002] At present, molten pool smelting technology has been widely used in the world to process lead sulfide concentrate, which is characterized by enhanced smelting with oxygen-enriched or pure oxygen. Due to the reduction of the amount of flue gas, the concentration of sulfur dioxide in the flue gas is greatly increased. Compared with the traditional smelting method, the environmental pollution problem has been basically solved, and the clean production of lead has become a reality. However, these furnaces still have disadvantages: strict requirements on the charge, complex structure of the oxygen blowing lance, short life, low reduction rate, and so on. [0003] Most lead smelters in my count...

AI Technical Summary

Problems solved by technology

However, these furnaces still have shortcomings: strict requirements on furnace materials, complex structure of oxygen blowing lance, short life, low reduction rate, etc.

[0004] The above methods, the huge waste of heat energy and the difficulty in recovering low-concentration sulfur dioxide flue gas produced by blast furnaces have attracted great attention from lead smelting manufacturers and metallurgical workers. Methods are under active development and trials

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