Novel type environmentally-friendly converter mending material for converter with large scrap ratio and preparation method of converter mending material

A technology of scrap steel ratio and furnace repair charge, which is applied in the field of new large scrap steel ratio converter environmental protection furnace repair charge and its preparation, can solve the problem of unfavorable magnesia resources and the long-term development of green environmental protection concepts, the ineffective use of fused magnesia, and the low utilization rate and other problems, to achieve the effect of improving the efficiency of the converter operation, good spreading and uniformity, and improving the effect

Pending Publication Date: 2019-02-15
西峡县耀辉冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the MgO content in magnesia-carbon brick waste is relatively high, resulting in the ineffective use of valuable fused magnesia, which is not conducive to the long-term development of China's magnesia resources and the concept of green environmental protection.
Although there are recycling methods, high-temperature calcination, converter slag adjustment and other utilization methods in China, there are also disadvantages such as low utilization rate, high energy consumption, and large pollution.

Method used

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  • Novel type environmentally-friendly converter mending material for converter with large scrap ratio and preparation method of converter mending material

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Comparison scheme
Effect test

Embodiment 1

[0032] A new type of environmentally friendly refurbishment material for a converter with a large scrap steel ratio in this embodiment is applied to a converter lining mainly made of high-carbon steel. The furnace charge is made of waste magnesia carbon bricks and high-temperature modified pitch, the mass percentage of 50-100mm particles of waste magnesia carbon bricks (component A) is 70%, and the mass percentage of 5-20mm particles of waste magnesia carbon bricks (component B) 25% by mass, high temperature modified asphalt (component C) 5% by mass, made into a repair charge with 80% magnesium oxide (MgO) content and 20% carbon (C) content.

[0033] After the converter is tapped, the excess slag is poured out, and the amount of steel added is 18kg / t, put into the scrap steel hopper and added to the converter at one time. Properly shake the furnace back and forth, so that the furnace charge and slag are fully mixed and evenly distributed. Then shake the converter to an approp...

Embodiment 2

[0044] A new type of environmentally friendly refurbishment material for a converter with a large scrap steel ratio in this embodiment is applied to a converter lining mainly made of low-carbon steel. The repair material is made of waste magnesia-carbon bricks and high-temperature modified asphalt. The mass percentage of 50-100mm grain waste magnesia-carbon bricks accounts for 80%, and the mass percentage of 5-20mm grain waste magnesia-carbon bricks accounts for 10%. The mass percentage of pitch is 10%, and it is made into a repair charge with a magnesium oxide (MgO) content of 75% and a carbon (C) content of 25%.

[0045] After the converter is tapped, excess slag is poured out, and 22kg / t of steel is added, put into the scrap steel hopper and added to the converter at one time. Properly shake the furnace back and forth, so that the furnace charge and slag are fully mixed evenly. Then shake the converter to an appropriate angle, so that the repair material and slag stay in t...

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Abstract

The invention discloses a novel type environmentally-friendly converter mending material for a converter with large scrap ratio and a preparation method of the converter mending material. The environmentally-friendly converter mending material for the converter is prepared by mixing the following raw materials by mass percentage: 70-80% of a component A, 10-25% of a component B and 5-10% of a component C; wherein the component A adopts waste magnesia-carbon bricks with the particle size of 50-100 mm; the component B adopts the waste magnesia-carbon bricks with the particle size of 5-20 mm; andthe component C adopts high-temperature modified asphalt. The particles of the waste magnesia-carbon bricks are utilized, therefore, the converter mending material for the converter is short in sintering time and high in sintering degree, has impact resistance, wear resistance and melt cinder corrosion resistance, is conductive to be adhered on an inner liner of the converter in a faster and moreefficient manner, ensures good spreadability and uniformity, and improves a mending effect of mended parts.

Description

technical field [0001] The invention belongs to the technical field of converter repair charge, and in particular relates to a novel environmental protection repair charge for a converter with a large scrap steel ratio and a preparation method thereof. Background technique [0002] Scrap steel is a green resource that can be recycled and utilized. It can replace pig iron raw materials for steelmaking in steel production. It reduces the process of coking, sintering and ironmaking, reduces energy consumption, and greatly reduces the discharge of waste gas, waste water and waste residue. Compared with producing steel from iron ore, producing 1 ton of steel from scrap steel can save 1.6 tons of iron ore, 0.4 tons of coke, and about 1 ton of raw coal, while reducing emissions of 1.6 tons of carbon dioxide and 3 tons of solid waste. "Eat less ore and eat more scrap steel" can not only reduce the dependence on iron ore imports and reduce industrial risks, but also the only way for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3206C04B2235/422
Inventor 王庆社余振西王佳伟
Owner 西峡县耀辉冶金材料有限公司
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