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Blast furnace air duct castable and preparation method thereof

A castable and air duct technology, applied in the field of unshaped refractory castables, can solve problems such as not being well solved, and achieve the effects of reducing thermal conductivity, moderate high temperature strength, and moderate bulk density

Inactive Publication Date: 2018-11-09
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the comprehensive utilization and resource treatment of ferro-titanium slag have not been well resolved so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A calcium aluminate titanate hollow sphere blast furnace duct castable and a preparation method thereof. Add 40% of 5-1mm calcium aluminate titanate hollow spheres, 30% of 1-0mm calcium aluminate titanate fine powder, 10% of 200 mesh calcium aluminate titanate fine powder, 6% of 200 mesh corundum fine powder and add raw materials The quality is 5% Al2O3 micropowder, 4% silica micropowder, 5% Secar71 cement binder and a small amount of water reducer sodium tripolyphosphate and sodium hexametaphosphate.

[0014] The calcium aluminate titanate hollow sphere blast furnace air duct castable prepared by the present invention is casted, cured for 24 hours, demolded, and dried at 110°C for 24 hours. After testing, the apparent porosity is 9.2%, the volume density is 2.76, and the bending resistance is 9.2%. The strength is greater than 12.4Mpa, and the compressive strength is greater than 175Mpa; under the condition of 1200°C for 3 hours, the apparent porosity is 17.7%, the bul...

Embodiment 2

[0016] A calcium aluminate titanate hollow sphere blast furnace duct castable and a preparation method thereof. Add 40% of 5-1mm calcium aluminate titanate hollow spheres, 30% of 1-0mm calcium aluminate titanate, 10% of 200 mesh calcium aluminate titanate fine powder, 6% of 200 mesh corundum fine powder and add raw materials The quality is 9% Al2O3 powder, 5% Secar71 cement binder and a small amount of water reducing agent R1.

[0017] The calcium aluminate titanate hollow sphere blast furnace air duct castable prepared by the present invention is casted, cured for 24 hours, demolded, and dried at 110°C for 24 hours. After testing, the apparent porosity is 9.4%, the volume density is 2.73, and the bending resistance The strength is greater than 12.4Mpa, and the compressive strength is greater than 175Mpa; under the condition of 1200°C for 3 hours, the apparent porosity is 17.9%, the bulk density is 2.91, the flexural strength is greater than 12.4Mpa, and the compressive streng...

Embodiment 3

[0019] A calcium aluminate titanate hollow sphere blast furnace duct castable and a preparation method thereof. 40% 5-1mm calcium aluminate titanate hollow spheres, 30% 1-0mm calcium aluminate titanate hollow spheres, 16% 200 mesh calcium aluminate titanate fine powder and 9% Al2O3 fine powder And 5% Secar71 cement binder and a small amount of water reducer R1.

[0020] The calcium aluminate titanate hollow sphere blast furnace air duct castable prepared by the present invention is casted, cured for 24 hours, demolded, and dried at 110°C for 24 hours. After testing, the apparent porosity is 10.4%, the volume density is 2.70, and the bending resistance The strength is greater than 12.4Mpa, and the compressive strength is greater than 175Mpa; under the condition of 1200°C for 3 hours, the apparent porosity is 17.8%, the bulk density is 2.89, the flexural strength is greater than 12.4Mpa, and the compressive strength is greater than 175Mpa; heat preservation at 1250°C Under the ...

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Abstract

The invention relates to a blast furnace air duct castable and a preparation method thereof, and belongs to the field of inorganic non-metal materials. The blast furnace air duct castable is preparedby adding 5 to 9% by mass of Al2O3 micro powder, 0-4% by mass of silicon micro powder, 2-5% by mass of Secar71 cement binder and a small amount of water reducing agent into 40% by mass of 5-1mm titanium calcium aluminate hollow spheres, 0-30% by mass of 1-0mm titanium calcium aluminate hollow spheres, 0-30% by mass of 1-0mm titanium calcium aluminate, 10 to 16% by mass of 200-mesh titanium calciumaluminate fine powder and 0 to 6% by mass of 200-mesh corundum fine powder for premixing, adding 3-5% by mass of water, stirring, and casting for molding to obtain the titanium calcium aluminate hollow sphere blast furnace air duct castable. The castable has the advantages of good fluidity, compact structure, high strength, good wear resistance, low thermal conductivity, good heat preservation effect, and the like, and can be used to replace the existing blast furnace air duct castable.

Description

technical field [0001] The invention belongs to the field of unshaped refractory castables. In particular, it relates to a calcium aluminate hollow ball blast furnace air duct pouring material and a preparation method thereof. Background technique [0002] The function of the blast furnace air supply branch pipe is to input the hot air from the hot air surrounding pipe into the furnace hearth through the tuyere, and at the same time, it sprays fuel or mineral powder, solvent and other substances to the blast furnace. It has been in a high-temperature, dusty environment for a long time, and the working conditions are harsh. The air supply branch pipe is composed of a main body, a tensioning device and accessories. The main body is composed of a straight pipe, an oblique joint, an elbow and a straight blow pipe. At present, the compensation devices for the air supply branch pipes used in blast furnaces in the iron and steel industry mostly adopt the form of high-temperature f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/44C04B35/462
CPCC04B35/44C04B35/462C04B35/66C04B2235/3217C04B2235/3222C04B2235/3232C04B2235/428C04B2235/528C04B2235/5427C04B2235/6022C04B2235/606C04B2235/77C04B2235/96C04B2235/9607
Inventor 魏军从胡绍京唐冰杰涂军波吕佳新严霜
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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