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Semi-steel tank bottom working layer castable

A technology of working layer and castable, which is applied in the field of refractory materials for steelmaking semi-steel tanks, can solve the problems of easy peeling, easy to be corroded by lime, shortening the service life of the working layer castable at the bottom of the tank, etc., and achieve the effect of reducing the apparent porosity

Pending Publication Date: 2022-03-15
GANGCHENG GRP LIANGSHAN RUIHAI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the problem that the existing castable for the working layer of the tank bottom is easy to peel off when the semi-steel is washed and desulfurized and sprayed, and is easily eroded by lime, which shortens the service life of the castable for the working layer of the tank bottom. The invention provides a semi-steel Pouring material for tank bottom working layer

Method used

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  • Semi-steel tank bottom working layer castable
  • Semi-steel tank bottom working layer castable
  • Semi-steel tank bottom working layer castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]70kg of 0.074mm-1mm medium zirconium corundum, 150kg of 1-3mm medium zirconium corundum, 80kg of 3-8mm plate-shaped corundum, 150kg of 8mm-12mm plate-shaped corundum, 110kg of 12mm-15mm plate-shaped corundum Put the corundum into the drum mixer for mixing and stirring. After mixing and stirring for 2 minutes, add 170kg of <0.074mm white corundum powder, 40kg of <0.005mm aluminum oxide powder, 30kg of <0.044mm cement CA70, 30kg of <0.044mm fused magnesium powder, 30kg of <0.044 graphite, 0.5kg of P201 produced by Shanda Chemical Company, and 0.3kg of JX-3-3 explosion-proof fiber were sent into the drum mixer for mixing and stirring. After mixing and stirring for 4 minutes, samples were taken to detect the physical and chemical indicators of the castable at the bottom of the semi-steel tank (see Table 3 for the test results). After passing the test, it was transported to a steel-vanadium cooperative repairing operation area.

[0037] The castable for the working layer of t...

Embodiment 2

[0043] 100kg of 0.074mm-1mm medium zirconium corundum, 200kg of 1-3mm medium zirconium corundum, 120kg of 3-8mm tabular alumina, 200kg of 8mm-12mm tabular alumina, 140kg of 12mm-15mm tabular corundum, Put the corundum into the drum mixer for mixing and stirring. After mixing and stirring for 4 minutes, add 200kg of <0.074mm white corundum powder, 60kg of <0.005mm aluminum oxide powder, 50kg of <0.044mm cement CA70, 50kg of <0.044mm fused magnesium powder, 50kg of <0.044 graphite, 1kg of P201 high-efficiency water reducer produced by Shanda Chemical Company, and 0.6kg of JX-3-3 explosion-proof fiber are sent to the drum mixer for mixing After mixing and stirring for 6 minutes, samples were taken to detect the physical and chemical indicators of the castable at the bottom of the semi-steel tank (see Table 4 for the test results). After passing the test, it was transported to a steel-vanadium cooperative repairing operation area.

[0044] The castable for the working layer of the...

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Abstract

The invention discloses a castable for a working layer at the bottom of a semi-steel tank. The castable is mainly prepared from the following raw materials in parts by weight: 7-10 parts of medium zirconia corundum particles with the particle size of 0.074-1mm; 15-20 parts of medium zirconia corundum particles with the particle size of 1-3 mm; 8-12 parts of tabular corundum particles with the particle size of 3-8 mm; 15-20 parts of tabular corundum with a particle size of 8-12 mm; 11-14 parts of tabular corundum with a particle size of 12-15 mm; 17-20 parts of white corundum powder of which the particle size is less than 0.044 mm; 4-6 parts of aluminum oxide micro powder with the particle size of less than 0.005 mm; 3-5 parts of CA70 cement with a particle size of less than 0.044 mm; 3-5 parts of fused magnesium powder with a particle size of less than 0.044 mm; 3-5 parts of graphite with a particle size of less than 0.044 mm; 0.05 to 0.1 part of an efficient water reducing agent and 0.03 to 0.06 part of explosion-proof fiber; and the anti-scouring agent is not easy to peel off during semi-steel scouring and desulfurization injection, is not easy to erode by lime, is long in service life, and meets the requirement that the required scouring resistance times are more than or equal to 850 times before overhaul.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for steelmaking semi-steel tanks, and in particular relates to a castable for the working layer of the bottom of a semi-steel tank. Background technique [0002] Blast furnace hot metal is pretreated by "vanadium extraction" or "three desulfurization" to become semi-steel. After the optimization of the vanadium extraction process in a steel vanadium steelmaking plant, the process of vanadium extraction first and then desulfurization is adopted, and the vanadium extraction molten steel (semi-steel) reaches the end When required, the steel starts to be tapped, and the semi-steel tank begins to receive molten steel. At this time, the bottom of the tank is scoured by the semi-steel. The scoured area is composed of impact bricks and castables for the working layer of the tank bottom, forming a "reinforced cement structure" in the refractory field to resist The impact of molten steel; the n...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/106
CPCC04B35/66C04B35/106C04B2235/3206C04B2235/425C04B2235/5208C04B2235/44C04B2235/3244C04B2235/77C04B2235/9607C04B2235/9669Y02P10/20
Inventor 赵杰陈超边程军谢平邓小兵郑常波杨学艳
Owner GANGCHENG GRP LIANGSHAN RUIHAI IND