Converter gas mixing device and method

Abstract

The invention provides a converter gas mixing device and a method. The mixing device comprises a converter gas branch pipe, a mixed gas pressure regulating unit, a mixed gas branch pipe and a mixed gas main pipe. The mixed gas pressure regulating unit is connected with the mixed gas branch pipe; and the converter gas branch pipe and the mixed gas branch pipe are respectively and independently connected to the mixed gas main pipe. The method comprises the following steps of (1) detecting the content of CO in converter gas; (2) determining the mixing ratio of mixed gas according to the CO content obtained in the step (1); and (3) mixing the mixed gas subjected to pressure regulation with the converter gas. The invention constructs the reasonable and efficient converter gas mixing device, the mixed gas with the proper variety and mixing ratio is determined according to the CO content of the converter gas, the combustion rate and heat value of the fuel are improved,the extensibility of combustion flame is increased, the calcination requirement of a rotary kiln is met, and the product quality of the rotary kiln is stabilized.

Description

technical field [0001] The invention belongs to the technical field of steel smelting, and relates to a mixing device, in particular to a converter gas mixing device and method. Background technique [0002] In the field of steel smelting, when the dust removal method of the converter is changed to the dry dust removal method, there is a common problem that the CO content in the converter gas decreases, which leads to large fluctuations in the gas quality, and the rotary kiln burner is often automatically cut off due to poor gas quality. Flame extinguishing causes instantaneous fluctuations in the reaction zone in the kiln, unstable thermal system, seriously affects the roasting effect, reduces the output, the recovery rate decreases, and the production cost increases. In view of the above-mentioned impact of converter gas, the production of rotary kiln can no longer be carried out normally, and the rotary kiln has repeatedly reduced production and stopped material insulatio...

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Problems solved by technology

[0002] In the field of steel smelting, when the dust removal method of the converter is changed to the dry dust removal method, there is a common problem that the CO content in the converter gas decreases, which leads to large fluctuations in the gas quality, and the rotary kiln burner is often automatically cut off due to poor gas quality Turning off the flame will cause instantaneous fluctuations in the reaction zone in the kiln, and the thermal system will be unstable, which will seriously affect the roasting effect, reduce the output, decrease the recovery rate, and increase the production cost.

In view of the above-mentioned effects of converter gas, the production of the rotary kiln has been unable to proceed normally, and the rotary kiln has repeatedly reduced production and stopped material insulation due to insufficient gas concentration, pressure and supply.

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