Method for purifying smelting furnace gas of submerged arc furnace

Abstract

The invention discloses a method for purifying smelting furnace gas of a submerged arc furnace. The method comprises the following steps that (1) cold air is mixed into the generated furnace gas through a water cooling flue, and carbonic oxide gas is preliminarily combusted; (2) the temperature of the furnace gas obtained after the carbonic oxide gas is preliminarily combusted is raised to range from 300 DEG C to 320 DEG C, the furnace gas enters a combustion settling chamber, the flow speed of the furnace gas is reduced, large-particle dust carried in the furnace gas settles, cold air is mixed properly, and finally the carbonic oxide gas is thoroughly burnt out; (3) the temperature of the furnace gas with the carbonic oxide gas burnt out is fast reduced to range from -4 DEG C to 0 DEG C through a condenser, and condensed furnace gas liquid is collected; (4) the temperature of the non-condensed furnace gas in the step (3) is reduced to range from 100 DEG C to 105 DEG C, and the furnace gas enters a bag-type dust remover and is discharged into the air after dust removal; and (5) the condensed furnace gas liquid is recycled after being purified by ozone generated by an ozone generator. According to the method, the process is simple and scientific, the remarkable purification effect is achieved on the furnace gas generated by the submerged arc furnace, environment pollution is effectively reduced, and the method is suitable for being utilized and popularized within a wide range.

Description

technical field [0001] The invention relates to a method for purifying furnace gas of submerged arc furnace smelting. Background technique [0002] The load of the submerged arc furnace transformer is continuous and stable, the impedance voltage is low, the number of voltage regulation stages is large, and the level difference is small and the overload capacity is strong. It can be divided into two types: on-load and off-excitation voltage regulation. Generally, the first few stages have constant capacity output, and the latter several stages have constant current output. It is mainly used for reducing smelting ores, carbonaceous reducing agents and solvents and other raw materials. It mainly produces ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicon-manganese alloy and other ferroalloys, which are important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide. Its working feature is to use carbon or m...

AI Technical Summary

Problems solved by technology

[0004] In view of the above, the present invention provides a method for purifying submerged arc furnace smelting furnace gas, which can effectively purify submerged arc furnace gas and solve the problem of furnace gas polluting the environment