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Molten iron desiliconization agent, pouring device and molten iron desiliconization pretreatment method

A desiliconizing agent and molten iron technology, which is used in the field of molten iron desiliconization in the metallurgical industry, can solve the problems of long time desiliconization treatment, large temperature loss in the treatment process, and large equipment investment, so as to achieve less equipment investment and better separation of slag and iron. , the effect of large processing power

Inactive Publication Date: 2015-03-11
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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Problems solved by technology

The advantage of these pretreatment methods for desiliconization of molten iron is that the utilization rate of oxygen during desiliconization reaction is high, and the silicon content of molten iron after treatment is stable. Disadvantages such as complicated operation

Method used

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  • Molten iron desiliconization agent, pouring device and molten iron desiliconization pretreatment method

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Embodiment 1

[0022] A molten iron desiliconization agent, the composition weight percentage of the desiliconization agent is: iron oxide scale (rolled iron oxide scale waste produced in the steel rolling production process): 75-80%, lime powder: 12-15%, fluorite powder: 5% ~8%, the particle size of this desiliconization agent is 2~5mm.

[0023] like figure 1 A kind of material throwing device shown, it comprises bracket 4, the material bin 3 that is installed on the top of bracket 4, it is characterized in that: the inlet of material bin 3 top is connected with the outlet of material storage 1, and material bin The top of 3 is provided with a load cell 2, and the outlet of the material bin 3 is provided with a discharge valve 5. A vibrating feeder 6 is arranged below the discharge port of the material bin 3, and the vibrating feeder 6 is installed on the support 4, and a swinging feeder 7 is provided at the discharge port of the vibrating feeder 6.

[0024] A method for pretreatment of m...

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Abstract

The invention relates to the technical field of metallurgical industry hot molten iron desiliconization treatment, and discloses a molten iron desiliconization agent, a pouring device and a molten iron desiliconization pretreatment method. The molten iron desiliconization agent comprises iron oxide scale, lime powder and fluorite powder, and has the particle size of 2-5mm. The pouring device comprises a bracket and a material bin, a material inlet at the top of the material bin is connected a material outlet of a material storage device, the top of the material bin is provided with a weighing sensor, a vibration feeder is arranged below an material outlet of the material bin, the vibration feeder is arranged on the bracket, and a material outlet of the vibration feeder is provided with a discharge valve and an oscillating material tank. According to the molten iron desiliconization pretreatment method, the molten iron desiliconization agent poured by the molten iron desiliconization agent pouring device is used to complete the molten iron desiliconization pretreatment. The ironmaking blast furnace iron tapping time is used as the desiliconization reaction treatment time, and the molten iron desiliconization pretreatment objective can be achieved by reaction of molten iron and a desiliconization agent poured into a molten iron trough by use of flow potential energy of the molten iron in a blast furnace.

Description

technical field [0001] The invention relates to the technical field of hot metal desiliconization treatment in the metallurgical industry, in particular to a hot metal desiliconization agent, a spraying device and a method for pretreatment of hot metal desiliconization. Background technique [0002] With the increasing demand for low-phosphorus molten iron in steelmaking production, the most important process change is the application of injection technology in ladle or torpedo tank, or the application of pretreatment technology for dephosphorization of molten iron in the dephosphorization converter. However, in the pretreatment of hot metal dephosphorization, since the affinity between silicon and oxygen in hot metal is greater than that between phosphorus and oxygen, when the silicon in hot metal is higher than 0.20%, the dephosphorization efficiency will be greatly affected and restricted. In order to improve the dephosphorization efficiency, the molten iron should be pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/04
Inventor 陈立章杨志国李积鹏何华仁
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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