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Tundish permanent-layer casting material and preparation method thereof

A castable and permanent layer technology, used in the field of refractory material manufacturing, can solve the problems of increased crack width and depth in the permanent layer of the middle cladding, short service life of the permanent layer of the middle cladding, and high labor intensity of workers, and achieves excellent product quality and surface. The effect of less cracks and strong peeling resistance

Inactive Publication Date: 2018-09-28
德清凯瑞新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the tundish permanent layer on the market mainly adopts the manufacturing method of high-temperature cement combined with bauxite clinker. A large amount of high-alumina cement and bauxite fine powder are used in the castable, so that the castable matrix is ​​forced to introduce more Calcium element, resulting in a shorter service life of the permanent layer of the tundish
After using several encapsulations, the body of the permanent layer of the middle layer cracks, severe sintering and peeling of the surface appear in some positions, requiring on-site construction personnel to carry out repeated repair operations, resulting in high labor intensity of the workers, and the permanent layer of the middle layer The width and depth of the cracks also increase with the increase of the number of uses, which makes the safety hazards in the iron and steel smelting production
In addition, with the improvement of refractory industry manufacturing technology, the overall contracting of steel plant tundish commercial transactions has become the mainstream. Steel companies continue to require refractory manufacturers to improve the quality of the working layer to reduce pollution to molten steel. Refractory manufacturers While striving to improve the quality of the working lining of the tundish permanent layer, in order to reduce production costs, the thickness of the tundish permanent layer was greatly reduced during construction, which caused the surface temperature of the permanent layer to become higher and higher during use, and further deteriorated its service life. The problem

Method used

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  • Tundish permanent-layer casting material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare raw materials according to the following parts by weight: 49kg of bauxite clinker particles (critical particle size range of 1 to 15mm), 15kg of bauxite clinker powder (critical particle size range of 0.1 to 0.088mm), coke gemstone particles (critical particle size range of 1 to 15mm) ) 13kg, coke gemstone powder (critical particle size range 0.1~0.044mm) 2kg, kyanite powder (critical particle size range 0.1~0.088mm) 8kg, silicon micropowder 5kg, alumina micropowder (critical particle size range 0.05~0.032mm) 5kg, high temperature Cement 3kg, sodium tripolyphosphate 0.1kg, sodium hexametaphosphate 0.1kg.

[0028] production method:

[0029] 1) Put the described bauxite clinker fine powder, coke gemstone powder, kyanite powder, alumina micropowder and high temperature cement into a ball mill and grind for 30 minutes to obtain multi-raw co-grinding fine powder;

[0030] 2) The co-milled fine powder obtained in step 1 and the bauxite particles, coke particles, sil...

Embodiment 2

[0032]Raw materials are prepared according to the following parts by weight: bauxite clinker particles (critical particle size range 5-15mm) 45kg, bauxite clinker powder (critical particle size range 0.1-0.088mm) 15kg, burnt gemstone particles (critical particle size range 1-15mm) ) 11kg, coke gemstone powder (critical particle size range 0.1-0.088mm) 2kg, kyanite powder (critical particle size range 0.1-0.088mm) 8kg, silicon micropowder 5kg, alumina micropowder (critical particle size range 0.05-0.032mm) 5kg, high temperature Cement 2.5kg, sodium tripolyphosphate 0.1kg, sodium hexametaphosphate 0.1kg.

[0033] production method:

[0034] 1) Put the bauxite clinker fine powder, burnt gemstone powder, kyanite powder, alumina micropowder, and high-temperature cement into a ball mill and grind for 20 minutes to obtain multi-raw material co-grinding fine powder;

[0035] 2) Transfer the co-ground fine powder obtained in step 1 and the alumina particles, burnt gemstone particles, ...

Embodiment 3

[0037] Raw materials are prepared according to the following parts by weight: bauxite clinker particles (critical particle size range 1-15mm) 47kg, bauxite clinker powder (critical particle size range 0.1-0.088mm) 15kg, burnt gemstone particles (critical particle size range 1-15mm) ) 11kg, coke gemstone powder (critical particle size range 0.1-0.088mm) 2kg, kyanite powder (critical particle size range 0.1-0.088mm) 8kg, silicon micropowder 5kg, alumina micropowder (critical particle size range 0.05-0.032mm) 5kg, high temperature Cement 2kg, sodium tripolyphosphate 0.1kg, sodium hexametaphosphate 0.1kg.

[0038] production method:

[0039] 1) Put the bauxite clinker fine powder, burnt gemstone powder, kyanite powder, alumina micropowder, and high-temperature cement into a ball mill and grind for 30 minutes to obtain multi-raw material co-grinding fine powder;

[0040] 2) Transfer the co-ground fine powder obtained in step 1 and the alumina particles, burnt gemstone particles, s...

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Abstract

The invention relates to a tundish permanent-layer casting material and a preparation method thereof, and belongs to the field of production of refractory materials. The tundish permanent-layer casting material is prepared from the following raw materials by weight: 40-60% of bauxite clinker particles, 10-30% of bauxite clinker fine powder, 5-15% of kyanite powder, 5-10% of alumina micro-powder, 5-15% of flint clay clinker particles, 2-8% of flint clay clinker fine powder, 2-7% of high-temperature cement, 1-5% of silicon micro-powder, 0.1-0.2% of sodium tripolyphosphate and 0.05-0.2% of sodiumhexametaphosphate.

Description

technical field [0001] The invention belongs to the field of refractory material manufacturing, and particularly relates to a permanent layer castable for tundish and a preparation method thereof. Background technique [0002] The permanent layer for the tundish is the refractory layer located on the back side of the working layer of the steelmaking furnace. It can support the working layer during the working process of the steelmaking furnace to prevent the molten steel in the furnace from further burning through and leaking after the steel infiltration or steel penetration accident occurs. Serious safety accidents, and at the same time, it also has the effect of thermal insulation of the steelmaking furnace in the normal working process, so it plays a very important role in the production of iron and steel smelting. [0003] At present, the middle-clad permanent layer on the market mainly adopts the manufacturing method of high-temperature cement combined with bauxite clin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101
CPCC04B35/101C04B2235/3222C04B2235/3418C04B2235/3463C04B2235/349C04B2235/447C04B2235/77C04B2235/96C04B2235/9615
Inventor 岳文鹏常德世
Owner 德清凯瑞新材料有限公司
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