Sealed follow-up type powder conveying device

Abstract

The invention discloses a sealed follow-up type powder conveying device. The device comprises a fixed inner cylinder, a rotating shell, a bearing and a follow-up air pipe, wherein a stirring hole is formed in the center of the fixed inner cylinder, and a stirring shaft penetrates through the stirring hole; the lower part of the fixed inner cylinder is matched with the inner ring of the bearing; the rotating shell is arranged outside the fixed inner cylinder, the upper part of the inner wall of the rotating shell is matched with the outer wall of the fixed inner cylinder, and the lower part ofthe inner wall of the rotating shell is matched with the outer ring of the bearing; a powder gas channel is formed in the fixed inner cylinder, the inlet of the powder gas channel communicates with the inlet of a peripheral desulfurizing agent powder supplying pipeline; a powder bin is arranged on the inner wall of the rotating shell, and the outlet of the powder gas channel communicates with thepowder bin; and the powder bin communicates with the follow-up air pipe, the inlet of the follow-up air pipe penetrates through the rotating shell, the follow-up air pipe is radially inserted into thestirring shaft, and the outlet of the follow-up air pipe communicates with the outside. The device has the beneficial effects that desulfurizing agent powder and molten steel can be fully contacted and uniformly mixed under the stirring effect of the stirring shaft, and safety and reliability are achieved.

Description

technical field [0001] The invention relates to auxiliary equipment for a KR stirring system of a steelmaking converter in the iron and steel industry, in particular to a sealed follow-up powder conveying device. Background technique [0002] The stirring desulfurization process of the KR method mainly involves the type, amount, adding method and particle size of the desulfurizer, the structure of the stirring paddle, the rotating speed, the mode of inserting the molten iron, and the temperature of the molten iron. After the desulfurizer is fine-grained, it is added to the molten iron by spraying, and the desulfurizer is fully mixed with the molten iron to prolong the residence time of the desulfurizer in the molten iron, which can increase the desulfurization rate and the utilization rate of the desulfurizer. [0003] Before desulfurization, there is blast furnace slag in the molten iron tank, and the slag should be removed first. If the slag removal is not enough, when th...

AI Technical Summary

Problems solved by technology

If the slag removal is not sufficient, when the desulfurizer is added by top spraying (or input), the desulfurizer may be blocked by the blast furnace slag, hindering the mixing of the desulfurizer and molten steel, resulting in unstable desulfurization effect

In addition, the desulfurizer can also be added by spraying from the bottom of the treatment container, but this method needs to punch holes and seal the ladle, and there are certain safety hazards if it is not handled properly

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