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Device and method for desulfurization by rotating inverted T-shaped spray gun

A technology of desulfurization device and spray gun, which is applied in the field of smelting technology, can solve the problems of poor kinetic conditions and achieve the effects of stabilizing the injection process, shortening the mixing time, and shortening the desulfurization treatment time

Inactive Publication Date: 2012-10-10
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the injection method is that the kinetic conditions are poor. Some studies have shown that when CaO-based desulfurizers are used, the desulfurization rate of the KR method is four times that of the injection method.

Method used

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  • Device and method for desulfurization by rotating inverted T-shaped spray gun

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Experimental program
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Effect test

Embodiment 1

[0020] The specific desulfurization method and steps of the inverted T-shaped spray gun rotary desulfurization method are as follows:

[0021] 1. After the desulfurization control system calculates the injection data, start the injection operation.

[0022] The lifting mechanism on the support 1 drives the spray gun fixed frame 4 to descend, and the inverted T-shaped spray gun 6 fixed on the spray gun fixed frame 4 is vertically inserted into the molten iron in the molten iron tank 7, and the insertion depth is the distance between the lower end of the inverted T-shaped spray gun 6 and the molten iron. The bottom distance of tank 7 is 200mm.

[0023] 2. When the powder feeding rate in the inverted T-shaped spray gun 6 reaches the set value, the motor control system starts the rotating motor 5, and the rotating motor 5 drives the inverted T-shaped spray gun 6 to perform periodic reciprocating rotation in the forward and reverse directions through the chain 3. The rotational an...

Embodiment 2

[0026] The specific desulfurization method and steps of the inverted T-shaped spray gun rotary desulfurization method are as follows:

[0027] 1. After the desulfurization control system calculates the injection data, start the injection operation.

[0028] The lifting mechanism on the support 1 drives the spray gun fixed frame 4 to descend, and the inverted T-shaped spray gun 6 fixed on the spray gun fixed frame 4 is vertically inserted into the molten iron in the molten iron tank 7, and the insertion depth is the distance between the lower end of the inverted T-shaped spray gun 6 and the molten iron. The bottom distance of tank 7 is 220mm.

[0029] 2. When the powder feeding rate in the inverted T-shaped spray gun 6 reaches the set value, the motor control system starts the rotating motor 5, and the rotating motor 5 drives the inverted T-shaped spray gun 6 to perform periodic reciprocating rotation in the forward and reverse directions through the chain 3. The rotational an...

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Abstract

The invention provides a device and a method for desulfurization by rotating an inverted T-shaped spray gun. A rotary motor is installed on a spray gun fixing frame, an inverted T-shaped spray gun is movably connected with a spray gun base, wherein a chain wheel is arranged on the upper part of the inverted T-shaped spray gun, the spray gun is connected with a chain wheel of the rotary motor by a chain, and the rotary motor is connected with a motor control system. A lifting mechanism drives the spray gun to insert into molten iron in an iron ladle, when powder feeding speed ratio reaches a set value, the rotary motor drives the spray gun to rotate forwardly and reversely, and when the injection powder amount reaches a set value, the motor stops rotating, and the lifting mechanism lifts the spray gun to the limit position. According to the device and the method, the dynamic condition of the desulfurization of molten iron is improved obviously, the acceleration of the desulfurization mass transfer process is facilitated, the desulfurization processing time is shortened, the magnesium floating stroke is increased due to magnesium-base desulfurization, the utilization ratio of magnesium is increased, the mixing time of sulfur and a desulfurizing agent in the iron ladle is shortened, the desulfurization effect is improved, and the phenomena of splashing and gun blocking in the blowing process are reduced.

Description

technical field [0001] The invention belongs to the technical field of smelting technology, and in particular relates to an inverted T-shaped spray gun rotary desulfurization device and a desulfurization method for molten iron injection desulfurization. Background technique [0002] At present, there are mainly two popular methods for hot metal desulfurization: KR method and injection method. The KR method is to immerse the cross-shaped stirring head poured with refractory materials and baked into the ladle molten pool to a certain depth, and use the vortex generated by its rotation to make the calcium oxide or calcium carbide-based desulfurization powder fully contact and react with the molten iron to achieve the purpose of desulfurization . Its advantage is that the dynamic condition is superior, it is beneficial to use cheap desulfurizers such as CaO, the desulfurization effect is relatively stable, the efficiency is high (desulfurization to ≤0.005%), the desulfurizer co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/02C21C7/064
Inventor 牛兴明徐国义魏春新尹宏军王富亮张琦刘文飞马宁
Owner ANGANG STEEL CO LTD
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