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Defoaming and slagging heat insulation agent for blast furnace ironmaking and preparation method thereof

A technology of blast furnace ironmaking and heat preservation agent, which is applied in the field of defoaming and slag heat preservation agent for blast furnace ironmaking, which can solve the problems of low utilization rate of equipment and achieve the effects of high recovery rate of molten iron, good fluidity and small cooling range

Inactive Publication Date: 2013-03-13
ZHENGZHOU DONGSHENG METALLURGY NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that iron slag and foam produced by blast furnace ironmaking cause low utilization rate of equipment, and a kind of defoaming slag heat preservation agent for blast furnace ironmaking is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A defoaming slag heat preservation agent for blast furnace ironmaking, which is made of the following raw materials in parts by weight: Portland cement clinker 15 kg, graphite 25 kg, fly ash 12 kg, vermiculite 20 kg , soda ash 15 kg, acidified graphite 1 kg, the mass fraction of CaO in the Portland cement clinker is 60%, SiO 2 The mass fraction of MgO is 25%, the mass fraction of MgO is 3.7%, SO 3 The mass fraction of C is 2.2%; The mass fraction of C in the described graphite is 85%; Al in the described fly ash 2 o 3 The mass fraction of CaO is 3.4%, the mass fraction of CaO is 3%, SiO 2 The mass fraction of C is 11.4%, and the mass fraction of C is 5%; SiO in the described vermiculite 2 The mass fraction of MgO is 40%, the mass fraction of MgO is 3%, Fe 2 o 3 The mass fraction is 3%, Al 2 o 3 The mass fraction of is 15%; Na in the said soda ash 2 CO 3 The mass fraction of C is 99.8%; the mass fraction of C in acidified graphite is 92%.

[0011] The preparati...

Embodiment 2

[0013] A defoaming slag heat preservation agent for blast furnace ironmaking, which is made of the following raw materials in parts by weight: Portland cement clinker 20 kg, graphite 30 kg, fly ash 18 kg, vermiculite 25 kg , soda ash 18 kg, acidified graphite 1-3 kg, the mass fraction of CaO in the Portland cement clinker is 45% SiO 2 The mass fraction of MgO is 25%, the mass fraction of MgO is 3.7%, SO 3 The mass fraction of C is 2.2%; The mass fraction of C in the described graphite is more than 85%; Al in the described fly ash 2 o 3 The mass fraction of CaO is 6.5%, the mass fraction of CaO is 15%, and the mass fraction of SiO 2 The mass fraction of C is 15.6%, and the mass fraction of C is 15%; SiO in the described vermiculite 2 The mass fraction of MgO is 60%, the mass fraction of MgO is 8%, Fe 2 o 3 The mass fraction is 6%, Al 2 o 3 The massfraction of is 23%; Na in the said soda ash 2 CO 3 The mass fraction of C is above 99.8%; the mass fraction of C in acidifi...

Embodiment 3

[0016] A defoaming slag heat preservation agent for blast furnace ironmaking, which is made of the following raw materials in parts by weight: Portland cement clinker 16 kg, graphite 28 kg, fly ash 16 kg, vermiculite 22 kg , 16 kg of soda ash, 2 kg of acidified graphite, the mass fraction of CaO in the Portland cement clinker is 50%, SiO 2 The mass fraction of MgO is 30%, the mass fraction of MgO is 3%, SO 3 The mass fraction of C is 2%; The mass fraction of C in the described graphite is more than 85%; Al in the described fly ash 2 o 3 The mass fraction of CaO is 5%, the mass fraction of CaO is 10%, and the mass fraction of SiO 2 The mass fraction of C is 14%, and the mass fraction of C is 10%; SiO in the described vermiculite 2 The mass fraction of MgO is 50%, the mass fraction of MgO is 6%, Fe 2 o 3 The mass fraction is 5%, Al 2 o 3 The massfraction of is 20%; Na in the said soda ash 2 CO 3 The mass fraction of C is 99.8%; the mass fraction of C in acidified graphi...

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Abstract

The invention discloses a defoaming and slagging heat insulation agent for blast furnace ironmaking. The heat insulation agent comprises the following raw materials in parts by weight: 15-20 parts of portland cement clinker, 25-30 parts of graphite, 12-18 parts of fly ash, 20-25 parts of vermiculite, 15-18 parts of sodium carbonate and 1-3 parts of acidized graphite. The defoaming and slagging heat insulation agent has the functions of slagging, defoaming, keeping the temperature, absorbing the inclusions of molten steel and preventing the oxidation of molten steel. After the product is added, the liquidity of iron slag is good, the slag-iron separation effect is good, the recovery rate of molten steel is high and molten steel can not stick to the ladle and wall and can not crust.

Description

technical field [0001] The invention relates to a defoaming slag heat insulating agent, in particular to a defoaming slag heat insulating agent used for blast furnace ironmaking. Background technique [0002] Blast furnace ironmaking inevitably produces a large amount of iron slag and foam. The inherent physical properties and process conditions of these iron slag determine that it is very easy to bond and deposit on the wall of the molten iron ditch, iron ladle, torpedo tank, and iron mixing furnace, causing iron The service life of the ditch is reduced, the effective use volume of the iron container is reduced, the sticky slag part is not easy to clean, the labor intensity of the workers is increased, the utilization rate of the equipment is reduced, and the smooth flow of the production process is seriously affected. Contents of the invention [0003] The technical problem to be solved by the invention is that iron slag and foam generated in blast furnace ironmaking cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00C21B3/02C21B3/06
CPCY02P10/20Y02W30/50
Inventor 慕永军
Owner ZHENGZHOU DONGSHENG METALLURGY NEW MATERIAL
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