Oxygen-enriched oxidation smelting method and device for antimony-containing material

Abstract

The invention discloses an oxygen-enriched oxidation smelting method for an antimony-containing material. The oxygen-enriched oxidation smelting method comprises the following steps: (1) mixing: uniformly mixing the antimony-containing material with an auxiliary material according to a certain ratio to obtain a mixed material; (2) pelletizing: pelletizing the mixed material, and delivering pellets into an oxygen-enriched oxidation smelting device; (3) air blasting: after carrying out thermal decomposition on the mixed material for 1-5min, introducing oxygen-enriched air with the oxygen volume concentration of 40-90% and the preheating temperature of higher than or equal to 700 DEG C into a furnace; (4) smelting: controlling the temperature and pressure inside the furnace, and producing a primary high-temperature melt, liquid high-antimony mineral slag and dust-laden gases after smelting; and (5) dust and gas recovery. The oxygen-enriched oxidation smelting method is high in oxidation degree and capable of increasing the recovery rate and reducing the energy consumption while reducing pollution; and the invention also provides the oxygen-enriched oxidation smelting device capable of conveniently and rapidly controlling the reaction atmosphere and temperature in a furnace body and has the characteristics of simple structure, good sealing performance and high raw material adaptability.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting, and in particular relates to an oxygen-enriched oxidation smelting method and a device for antimony-containing materials. Background technique [0002] At present, in the smelting process of the antimony-containing material oxidation furnace, a large amount of oxygen needs to be provided for oxidation reaction with coke or metal. The existing oxygen supply method is to directly blow air into the furnace with a blower. Due to the low concentration of oxygen in the air (only about 21%) and high useless components such as nitrogen (up to 79%), not only the smelting process cannot be strengthened, but also a large amount of heat energy is taken away, making this process more advanced than other non-ferrous metal smelting processes. The processing capacity of the process unit is low (about 20t / m2.d), the energy consumption and material consumption are high (the coke rate is more tha...

AI Technical Summary

Problems solved by technology

Due to the low concentration of oxygen in the air (only about 21%) and high useless components such as nitrogen (up to 79%), not only the smelting process cannot be strengthened, but also a large amount of heat energy is taken away, making this process more advanced than other non-ferrous metal smelting processes. The processing capacity of the process unit is low (about 20t / m2.d), the energy consumption and material consumption are high (the coke rate is more than 30%, the iron ore rate is more than 50%), and the SO in the waste gas 2 Low concentration (0.8%-1.5%) is not conducive to recycling and comprehensive utilization, thus increasing production costs

[0003] As a small metal, antimony metal has a small production scale. Compared with copper, lead, zinc and other metals in terms of smelting equipment technology, antimony metal is relatively backward. At present, traditional blast furnaces and reverberatory furnaces are basically used for smelting. Blast furnaces and reverberatory furnaces are used as Traditional smelting furnaces are already outdated and eliminated facilities in the fields of copper, lead, zinc, etc., and are currently banned. For antimony metal smelting, there are also problems such as serious environmental pollution, high energy consumption, and low metal recovery rate, especially the flue gas. The concentration of sulfur dioxide in the medium is low, which cannot meet the requirements of acid production, the site is full of smoke, and the operating environment is poor

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