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A kind of molten steel thermal insulation agent and thermal insulation agent layer thereof

A heat preservation agent and molten steel technology, applied in the field of heat preservation agent, can solve the problems of poor heat preservation effect, poor spreading effect, high fixed carbon content, etc., and achieve the effect of excellent spreading performance, good heat preservation effect and low production cost

Active Publication Date: 2020-04-07
赣州鼎洋贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The heat preservation agent for molten steel currently used is mainly carbonized rice husk, which has a high fixed carbon content and can only be used as heat preservation agent for high carbon steel. The application range is narrow, the spreading effect is not good, and the heat preservation effect needs to be improved.

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  • A kind of molten steel thermal insulation agent and thermal insulation agent layer thereof

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Embodiment 1

[0020] The invention provides a molten steel heat preservation agent, comprising the following components in parts by mass: carbonized rice husk ash: 70 parts; carbon source (coke powder): 10 parts; silicon source (dusted perlite): 1 part; The carbonized rice husk ash includes elements in the following mass percentages: C: 2%; Si: 60%; balance 38%: H, O, S, Ca, Fe, P; the moisture content of the carbonized rice husk ash is 0.7% of the total mass of the insulating agent; the bulk density of the S1 layer is 0.35g / cm 3 .

[0021] The average particle size of the carbon source is not more than 100nm, and 90% of the particle size ranges from 90 to 100nm; the mass percentage of the carbon source carbon is 87.15%. The average particle size of the silicon source is not more than 100nm, and 85% of the particle size ranges from 90 to 100nm; the mass percentage of silicon in the silicon source is 92.05%. The carbon source and the silicon source are both nano-scale powders, and most of ...

Embodiment 2

[0024] The invention provides a molten steel thermal insulation agent, comprising the following components in parts by mass: carbonized rice husk ash: 85 parts; carbon source (coke powder, graphite powder): 5 parts; silicon source (dusted perlite, pulverized coal ash): 15 parts; the carbonized rice husk ash includes the following elements in mass percentage: C: 10%; Si: 50%; balance 40%: H, O, S, Ca, Fe, P; the carbonized rice The moisture content of the shell ash is 1.7% of the total mass of the thermal insulation agent; the bulk density of the S1 layer is 0.20g / cm 3 .

[0025] The average particle size of the carbon source is not more than 100nm, and 90% of the particle size ranges from 90 to 100nm; the mass percentage of the carbon source carbon is 87.15%. The average particle size of the silicon source is not more than 100nm, and 85% of the particle size ranges from 90 to 100nm; the mass percentage of silicon in the silicon source is 92%.

[0026] The spreading thickness...

Embodiment 3

[0028] The invention provides a molten steel heat preservation agent, comprising the following components in parts by mass: carbonized rice husk ash: 100 parts; carbon source (graphite powder): 1 part; silicon source (dusted perlite, fly ash, silicon algae): 30 parts; the carbonized rice husk ash includes the following elements in mass percent: C: 17%; Si: 40%; balance 43%: H, O, S, Ca, Fe, P; the carbonized The water content of the rice husk ash is 3% of the total mass of the thermal insulation agent; the bulk density of the S1 layer is 0.18g / cm 3 .

[0029] The average particle size of the carbon source is not more than 100nm, and 95% of the particle size ranges from 90 to 100nm; the mass percentage of the carbon source carbon is 85%. The average particle size of the silicon source is not more than 100nm, and 85% of the particle size ranges from 90 to 100nm; the mass percentage of silicon in the silicon source is 96%.

[0030] The spreading thickness of the S1 layer is 5 c...

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Abstract

The invention discloses a molten steel thermal insulating agent and belongs to the field of thermal insulating agents. The molten steel thermal insulating agent comprises the following components of,by mass, 70-100 parts of carbonized rice husk ash, 1-10 parts of carbon source and 1-30 parts of silicon source, and the carbonized rice hull ash comprises the following elements of, by mass, 2%-17% of C, 40%-60% of Si, and the balance H, O, S, Ca, Fe and P. Water of the carbonized rice husk ash is less than 3% of the total mass of the thermal insulating agent. The bulk density of the molten steelthermal insulating agent is 0.18-0.35 g / cm<3>. Compared with carbonized rice hulls of a honeycomb structure, the molten steel thermal insulating agent provided by the invention can make the surface temperature of molten steel be lowered to 0.78 DEG C.min<-1> from 1.56 DEG C.min<-1> maximally. The molten steel thermal insulating agent provided by the invention is low in heat conductivity coefficient, good in thermal insulating effect, excellent in spreadability, free of caking, and low in production cost.

Description

technical field [0001] The invention relates to the field of thermal insulation agents, and more specifically, to a molten steel thermal insulation agent and its thermal insulation layer. Background technique [0002] In the process of blast furnace ironmaking, molten steel is transported from the ironmaking blast furnace to the steelmaking converter, but the transportation distance between the ironmaking blast furnace and the steelmaking converter is often long, the waiting time is long, and the temperature drop of molten steel is relatively fast. Insulation agent is added to the molten steel to keep the molten steel warm. In recent years, with the gradual increase of production scale and capacity and the progress of production technology, the capacity of steel ladle has gradually increased, and the time for molten steel to stay in the ladle will be extended. In order to meet the subsequent process requirements, a large amount of heat insulating agent is used to maintain t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D1/00C21C1/00C21C7/00
Inventor 邓海洋聂海勤
Owner 赣州鼎洋贸易有限公司
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