Steel ladle edge refractory castable

A refractory castable and ladle technology, which is applied in the field of refractory materials used in ladle, can solve the problems of short service life of ladle and damage to refractory materials, and achieve the effects of improving the quality of use, preventing slag sticking, and high strength

Inactive Publication Date: 2015-10-21
莱芜钢铁集团泰东实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are also high-strength castables in the prior art. For example, the Chinese patent document with the application number 201310089434.9 discloses the refractory castable along the ladle and its pre

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of ladle edge refractory castable, its raw material includes mass percent as:

[0038] Burnt gemstone aggregate with a particle size of 10-25mm: 16%, burnt gemstone aggregate with a particle size of 5-10mm: 8%, burnt gemstone aggregate with a particle size of 3-5mm: 9%, with a particle size of 1- 3mm coke gemstone aggregate: 15%; used magnesia carbon brick aggregate: material with a particle size of 0.088-1mm: 12%, material with a particle size of less than 0.088mm: 10%; high alumina bauxite: a particle size of 0.088 -1mm material: 7%, 325 mesh fine powder: 9%; pure calcium aluminate cement: 1%, boron glass: 2%, spodumene: 2%, kyanite: 3%, silica powder: 2% , Steel fiber: 2%, binder: 2%, binder includes sodium tripolyphosphate, sodium hexametaphosphate and explosion-proof fiber.

Embodiment 2

[0040] A kind of ladle edge refractory castable, its raw material includes mass percent as:

[0041] Burnt gemstone aggregate with a particle size of 10-25mm: 16%, burnt gemstone aggregate with a particle size of 5-10mm: 8%, burnt gemstone aggregate with a particle size of 3-5mm: 9%, with a particle size of 1- 3mm coke gemstone aggregate: 15%; used magnesia carbon brick aggregate: material with a particle size of 0.088-1mm: 10%, material with a particle size of less than 0.088mm: 12%; high alumina bauxite: a particle size of 0.088 -1mm material: 9%, 325 mesh fine powder: 7%; pure calcium aluminate cement: 1%, boron glass: 1.5%, spodumene: 2%, kyanite: 3%, silica powder: 2.5% , Steel fiber: 2%, binder: 2%, binder includes sodium tripolyphosphate, sodium hexametaphosphate and explosion-proof fiber.

Embodiment 3

[0043] A kind of ladle edge refractory castable, its raw material includes mass percent as:

[0044]Burnt gemstone aggregate with a particle size of 10-25mm: 16%, burnt gemstone aggregate with a particle size of 5-10mm: 8%, burnt gemstone aggregate with a particle size of 3-5mm: 9%, with a particle size of 1- 3mm coke gemstone aggregate: 15%; used magnesia carbon brick aggregate: material with a particle size of 0.088-1mm: 7%, material with a particle size of less than 0.088mm: 15%; high alumina bauxite: a particle size of 0.088 -1mm material: 10%, 325 mesh fine powder: 5%; pure calcium aluminate cement: 2%, boron glass: 1%, spodumene: 3%, kyanite: 4%, silica powder: 2% , Steel fiber: 1%, binder: 2%, binder includes sodium tripolyphosphate, sodium hexametaphosphate and explosion-proof fiber.

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Abstract

The invention provides a steel ladle edge refractory castable which comprises the following raw materials in percentage by mass: 40-60% of flint clay aggregate, 15-25% of used magnesia carbon bricks, 15-25% of high aluminium bauxite, 1-3% of cement, 1-2% of borax glass, 2-3% of spodumene, 3-4% of kyanite, 2-3% of silicon micro-powder, 1-2% of steel fiber and 1-2% of binding agent, wherein the binding agent comprises at least one of sodium tripolyphosphate, sodium hexametaphosphate and explosion-proof fiber. According to the steel ladle edge refractory castable provided by the invention, high strength, bonded slag resistance and an excellent anti-heat shock stability property are taken into consideration, and the using quality of the steel ladle edge material is greatly improved.

Description

technical field [0001] The invention relates to a refractory material used for ladles, in particular to a castable for magnesia-carbon brick ladles, which belongs to the metallurgical industry. Background technique [0002] Magnesia-carbon brick ladles in steelmaking plants are usually composed of cladding, permanent layer castables, working lining (magnesia-carbon bricks) and ladle edge castables. The magnesia-carbon bricks on the ladle slag line are loose or fall off to maintain the integrity of the working lining. [0003] The pouring material along the ladle seldom directly contacts the molten steel, and it is only affected by the radiation heat of the molten steel, so the operating temperature is relatively low, generally between 1200-1300°C, but because the ladle belongs to the intermittent working mode, the ladle needs to be resistant to thermal shock High performance requirements. In addition, when the ladle is blown with argon, the molten slag and the molten steel...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 巩秀民李秀美冯德斌张功初皓好尚小龙
Owner 莱芜钢铁集团泰东实业有限公司
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