Lead anode mud melting high temperature furnace gas grading temperature control dust collection purifying technology

Abstract

The invention discloses a lead anode mud melting high temperature furnace gas grading temperature control dust collection purifying technology. The technology is carried out to respectively obtain highly pure arsenic trioxide and antimony (III) oxide. The technology comprises the following steps: 1, inducing lead anode mud melting furnace gas generated in an industrial kiln into a furnace gas grading temperature control dust collection purifying device; 2, introducing the furnace gas into a first stage temperature control cooling unit in the device; 3, introducing a first dust carried furnace gas discharged from the first stage temperature control cooling unit into a first stage gas filtering unit; 4, introducing a furnace gas discharged from the first stage gas filtering unit into a second stage temperature control cooling unit; 5, introducing a second dust carried furnace gas discharged from the second stage temperature control cooling unit into a second stage gas filtering unit; 6, introducing a furnace gas discharged from the second stage gas filtering unit into a third stage temperature control cooling unit; and 7, introducing a third dust carried furnace gas discharged from the third stage temperature control cooling unit into a third gas filtering unit.

Description

technical field [0001] The invention relates to a dust collection and purification process of high-temperature furnace gas classification and temperature control for lead anode slime smelting. Background technique [0002] The inventors found that the furnace gas produced by industrial kilns sometimes contains two or more gaseous substances with different desublimation temperatures, and the solid particles formed by each substance after cooling happen to have independent use value. Traditional furnace gas treatment methods can only obtain solid mixtures of these substances, which brings great trouble to the separate recovery of various solid particles. For example, lead anode slime smelting furnace gas (lead anode slime is a by-product produced in the process of lead electrolytic refining, currently the valuables in it are mainly recovered through pyroprocessing, and the lead anode slime needs to be smelted to produce furnace gas ) are mainly composed of arsenic trioxide an...

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Problems solved by technology

For example, lead anode slime smelting furnace gas (lead anode slime is a by-product produced in the process of lead electrolytic refining, currently the valuables in it are mainly recovered through pyroprocessing, and the lead anode slime needs to be smelted to produce furnace gas ) are mainly composed of arsenic trioxide and antimony trioxide (the desublimation temperature of antimony trioxide is higher than that of diarsenic trioxide), and contains a small amount of lead oxide. The dust can either produce crude antimony and white arsenic through a series of steps such as reduction-ball pressure-roasting, or mix it with charcoal and successively distill and condense it to produce arsenic-antimony alloy, or use high-pressure water immersion process. trouble

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