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Side-blowing spray gun

A spray gun and pipeline technology, applied in the field of metallurgy, can solve the problems of small size design of the furnace body, increase the outlet speed of the oxygen injection lance, and the limited stirring effect of the molten pool, etc., so as to delay the time of upward flow and residence time The effect of prolonging and increasing the stirring area

Pending Publication Date: 2018-07-06
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the smelting process, due to the lack of gas jet power, the side blowing method has a limited effect on the stirring of the molten pool, which greatly limits the single furnace processing capacity of the side blowing furnace, so the size of the furnace body is designed to be small
In order to strengthen the stirring effect and increase the gas power, it is more important to increase the number of oxygen injection lances and the outlet speed of the injection gas, and the gas jet drives the flow of the melt to cause splashing on the surface of the molten pool, and the high-temperature melt is splashed in the furnace. The roof and the furnace wall will cause loss of refractory materials on the furnace wall and flue mouth, which will affect the overall service life of the furnace body.
[0003] As a result, the gas power of the spray gun needs to be improved

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0044] In this embodiment, the side wall on the opposite side of the smelting furnace adopts the side blowing lance of the embodiment of the present invention, and the side blowing lances are arranged in pairs, and the smelting furnace is used to smelt the copper concentrate, and the copper concentrate includes ( Mass percentage components): Cu35%, Fe4.5%, S22%, Ni1%, etc., the specific method is as follows:

[0045] 1000kg of copper concentrate is added into the furnace body from the feeding port, oxygen-rich gas (oxygen content is 95wt%) is introduced from the gas passage in the oxygen lance, and the cooling water is introduced from the water cooling passage, and the clamp between the oxygen lance and the normal line of the furnace wall is adjusted. The angle is 10°, the gas is accelerated in the gas channel, and is dispersed into multiple rotating jets by the shunt cover with an inclined angle at the exit of the gun. There are irregularities in the direction of the molten p...

Embodiment 2

[0048] In this embodiment, the side-blown smelting furnace of the embodiment of the present invention is used to smelt the copper concentrate, wherein the copper concentrate includes (mass percentage components) Cu28%, Fe27%, S30%, SiO27% and quartz flux (containing SiO 2 95%), etc., the side blowing lance of the smelting furnace is located on the opposite side wall of the furnace body, and the angle between the side blowing lance body and the normal direction of the furnace wall surface is 15°, and the outlet velocity direction of the blowing gas is toward the lower part of the molten pool Flow, this kind of injection method partly weakens the velocity component in the horizontal direction, and on the other hand increases the flow path of the gas in the vertical direction, so that the oxygen can fully contact the melt, the oxidation reaction is more thorough, and the heat released is more. , basically meet the needs of self-heating smelting. At the same time, the speed of ga...

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Abstract

The invention discloses a side-blowing spray gun which comprises a central pipeline, a diffluence cover, a sleeve and a cooling medium pipeline, wherein the diffluence cover is arranged at the outletof the central pipeline; diffluence holes are formed in the diffluence cover; the sleeve is arranged out of the central pipeline in a sleeving manner; the inner walls of the sleeve and the outer wallsof the central pipeline define a cooling medium accommodating space; and the cooling medium pipeline is arranged in the cooling medium accommodating space. Through arranging the diffluence cover at the outlet of the central pipeline of the spray gun, the central jet flow is divided into a plurality of rotation jet flows by the diffluence cover, so that the stirring area of the jet flow is increased and the stirring effect to a molten pool is remarkably enhanced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a side blowing spray gun. Background technique [0002] At present, copper smelting process of copper concentrate to obtain copper matte has become an advanced copper smelting process. During the production process, the grade of copper matte will reach more than 60%. In the smelting process, due to the lack of gas jet power, the side blowing method has limited stirring effect on the molten pool, which greatly limits the single furnace processing capacity of the side blowing furnace, so the size of the furnace body is designed to be small. In order to strengthen the stirring effect and increase the gas power, it is more important to increase the number of oxygen injection lances and the outlet speed of the injection gas, and the gas jet drives the flow of the melt to cause splashing on the surface of the molten pool, and the high-temperature melt is splashed in the furnace. The roof an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D3/16
CPCF27D3/16F27M2003/13F27D2003/163F27D2003/169
Inventor 李鹏姚心
Owner CHINA ENFI ENGINEERING CORPORATION
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