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Tundish cover castable

A castable and cover technology, applied in the field of tundish refractory materials, can solve problems such as structural spalling, low thermal strength, cracks, etc., and achieve the effect of superior thermal shock resistance and good pouring construction performance

Active Publication Date: 2019-02-22
GANGCHENG GRP LIANGSHAN RUIHAI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the more common refractory materials are clay and high-alumina materials. Although the composite structure has improved the service life of the tundish cover, there is still a phenomenon of thermal stress imbalance between the castable and the metal frame during use. Lead to partial cracks, low thermal strength, and partial structural peeling

Method used

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Examples

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Effect test

Embodiment 1

[0038] The raw material of the tundish lid castable of the present invention adopts formula 1, as shown in Table 3. After the raw materials are qualified, they are weighed, stirred and packaged and then sampled and tested. The physical and chemical indicators of the tundish lid castable are shown in Table 4. After being qualified, it will be transported to the tundish construction area for use.

[0039] Table 3 Tundish cover castable formula 1

[0040]

[0041]

[0042] The refractory castable of this embodiment was used as the overall casting material for the tundish cover. This time, 6 tons of the tundish cover castable was sent to the tundish construction area. The data after the overhaul of 3 tundishes and the overhaul data of the original castable were collected. In contrast, the casting performance of the three test tundishes is good, the average water addition is 5.3%, which is 1.2% lower than the average water addition of 6.5% of the original castable. There is no material ...

Embodiment 2

[0046] The raw material of the tundish lid castable of the present invention adopts formula 2, as shown in Table 5. After the raw materials are qualified, they are weighed, stirred and packaged and then sampled and tested. The physical and chemical indicators of the tundish lid castable are shown in Table 6. After being qualified, it will be transported to the tundish construction area for use.

[0047] Table 5 Tundish cover castable formula 2

[0048]

[0049]

[0050] The tundish cover refractory castable of this embodiment is used as the overall refractory refractory castable for the tundish. This time, 4 tons of tundish cover refractory castables are sent to the tundish construction area, and the data and original data of 2 tundish overhauls are collected. Comparing the data of castable overhaul, the two test tundish have good casting performance. The average water addition is 5.2% compared with the original castable 6.4%. There is no material drop during curing and baking, cra...

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Abstract

The invention belongs to the technical field of tundish refractories, and particularly relates to a tundish cover castable. According to the tundish cover castable, the tundish cover castable is prepared from the following raw materials and components in percentage by weight: brown fused alumina, hard clay, electro-fused magnesite powder, zirconite, sintered mullite, alumina powder, aluminum oxidemicro powder, silica dust powder and cement, and additionally prepared from a water reducer, explosion-proof fibers and stainless steel fibers. The tundish cover castable has the advantages of beinggood in casting construction property, excellent in thermal shock resistance, resistant to structural peeling and the like.

Description

Technical field [0001] The invention belongs to the technical field of tundish refractory materials, and specifically relates to a tundish cover castable. Background technique [0002] The tundish cover mainly provides an environment for heat preservation and prevention of molten steel splashing for the tundish. Its production and development history includes all cast steel parts and all cast iron, and then gradually developed into the current general metal frame + refractory castable composite structure. The cover of the all-cast steel structure is extremely unevenly heated when working under high temperature and heat radiation, which is prone to large thermal stress and thermal stress difference, especially when subjected to multiple extreme cold and extreme heat operations, and the steel parts repeatedly produce phase changes , Eventually lead to deformation and warping; and the cover of all cast iron parts is brittle, and the cover will crack after only one use, and then brea...

Claims

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Application Information

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IPC IPC(8): C04B35/101
CPCC04B35/101C04B2235/3206C04B2235/3248C04B2235/3418C04B2235/349C04B2235/5216C04B2235/77C04B2235/96C04B2235/9607
Inventor 青光红罗天军黄天翔赵杰陈超高亮胡志豪唐贵川
Owner GANGCHENG GRP LIANGSHAN RUIHAI IND
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