Convection uniform mixing type steel mud device and uniform mixing process

Abstract

The invention discloses a convection uniform mixing type steel mud device and a uniform mixing process, and belongs to the technical field of steelmaking. The device comprises, a convection steel mud pool, wherein a stirring mechanism is mounted in an inner cavity of the convection steel mud pool; a steel mud receiving tank, communicated with the inner cavity of the convection steel mud pool through a steel mud conveying pipeline; a steam pipeline, used for guiding hot air flow into the inner cavity of the convection steel mud tank, wherein an output port of the steam pipeline is positioned in an inner cavity of the convection steel mud tank; a circulating water tank, communicating with the inner cavity of the convection steel mud tank through a circulating pipeline; and a mixing machine, communicating with the inner cavity of the convection steel mud tank through a mixed water pipeline, wherein a water suction pump unit and an adjusting valve are mounted on the mixed water pipeline. Hot steam is input into the steel mud receiving tank through the steam pipeline, it is guaranteed that the temperature of a mixed solution reaches about 60 DEG C, when the temperature of the mixed solution ranges from 65 DEG C to 70 DEG C, slaking of quick lime can be facilitated, the reaction is more complete, the heat requirement in the sintering process is lowered, the requirement for forming calcium ferrite in the sintering reaction is met, and the purposes of reducing solid consumption and accelerating sintering reaction are achieved.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a convective mixing type steel mud device and a mixing process. Background technique [0002] In recent years, with the increase of iron and steel production, the recycling of solid waste will become the goal pursued by various iron and steel enterprises. In sintering production, the recycling of steelmaking and hot rolling products——steel slime has been formulated into sintering mixture. become a more common technique. However, due to the chaotic composition of steel slime, large fluctuations, and high water content, the existing technology is to stack the steel slime on the site, and after a long period of water control and evaporation, a low-moisture iron-containing material is formed, which can be used through batching, but After the water evaporates, it is easy to form large blocks, and the particle size deviation is too large, which restricts the mixing deg...

AI Technical Summary

Problems solved by technology

However, due to the chaotic composition of steel slime, large fluctuations, and high moisture content, the existing technology is to stack the steel slime on the site, and after a long period of water control and evaporation, a low-moisture iron-containing material is formed, which can be used by batching, but After the water evaporates, it is easy to form large blocks, and the particle size deviation is too large, which restricts the mixing degree of ingredients and brings inconvenience to sintering

The existing technology has a great impact on sintering. The addition of steel slurry lacks an effective method of uniform composition and raising the temperature of the mixture, and the stability of the composition of the mixture directly affects the stability of the quality of the sinter. Generally, the way to increase the temperature of the material is through steam Or to improve the quality of lime, the method of steaming is relatively wasteful, at least 30-40% of the steam is discharged, and the quality of lime is improved, and the price of lime will be greatly increased (80-90 yuan / ton), the gain outweighs the gain

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