Prefabricated integrated lining of continuous casting pouring basket and its preparing method

A continuous casting tundish and overall technology, which is applied in casting equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of labor intensity of migrant workers, can only be transported manually, and inconvenient safety management, so as to reduce potential safety hazards and facilitate on-site Good management and structural strength

Inactive Publication Date: 2004-02-11
王有志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods not only increase the workload of on-site management for steel mills, but also bring great potential safety hazards
As far as its service life is concerned, if the masonry silicon insulation board is used, the life span is only 6 to 7 hours, and if the magnesia material is used, the life span can only reach about 13 hours, which limits the productivity and yield of continuous casting. The output cannot be increased, and it is also very difficult to take off the package, and the tundish is often damaged, and the consumption of refractory materials for continuous casting of steel per ton is more than 7 yuan; although the service life of the magnesia material lining and the masonry prefabricated plate on site can reach More than 40 hours, but there are many people on site, which increases the investment in construction equipment on site, and the construction period is long. Migrant workers are not only labor-intensive in the harsh high-temperature environment, but also because migrant workers generally have low safety awareness and poor quality awareness. phenomenon, which makes it difficult to control the construction quality, and at the same time brings a lot of inconvenience to the site safety management; the prefabricated panel is made of several plate-shaped prefabricated blocks by separating the wall and the bottom of the tundish, so its structural strength is very low In addition, the weight of prefabricated panels is much heavier than that of silicon insulation panels, and it is impossible to install lifting rings, so they can only be transported manually during masonry, and the loss rate is particularly high during the process of transportation and masonry. Due to the large number of blocks and joints, the quality of masonry is difficult to control, and leakage accidents are prone to occur, and the cost is difficult to reduce, which limits the popularization and application of this product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The invention is prepared from the following raw materials in weight ratio: 85% of fused magnesia, 5.1% of refractory grade chromite powder with a purity ≥ 46%, 9% of thermoplastic phenolic resin, and 0.9% of urotropine.

[0023] The preparation method of the present invention is as follows:

[0024] First use magnesia-chromium (fused magnesia plus refractory grade chromite powder with a purity of ≥46%) to pour the castable into the mold containing the impact zone and the steel-drawing zone designed according to the shape and size of the permanent lining inner wall of the user's tundish After heat treatment and demoulding, each area can be installed with suspension rings. The specific process steps include:

[0025] A. First design and manufacture molds for the impact zone and steel drawing zone according to the shape, size and usage of the inner wall of the permanent lining of the tundish of the user;

[0026] B, first mix 65% fused magnesium particles, 9% thermoplast...

Embodiment 2

[0032] The invention is prepared from the following raw materials in weight ratio: 90% of sintered magnesia, 4.5% of refractory grade chromite powder with a purity ≥ 46%, 5% of thermoplastic phenolic resin, and 0.5% of urotropine.

[0033] The preparation method of the present invention is as follows:

[0034] Firstly, the magnesia-chrome castable prepared from raw materials such as sintered magnesia and chrome concentrate is poured into the mold containing the impact zone and the steel-stretching zone designed according to the shape and size of the permanent lining inner wall of the user's tundish, and then heat-treated. It is enough to install rings on each area, and the specific process steps include:

[0035] A. First design and manufacture molds for the impact zone and steel drawing zone according to the shape, size and usage of the inner wall of the permanent lining of the tundish of the user;

[0036] B. First mix 67% of sintered magnesia coarse, medium and fine partic...

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PUM

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Abstract

The prefabricated integrated lining of continuous casting pouring basket is produced with the materials including magnesium material 85-90 wt%, chromium iron ore powder 2-6 wt%, binding agent 4-10 wt% and urotropine 0.4-1 wt%. The production process includes following steps: pouring with magnesium material and chromium iron ore powder in the mold of the permanent lining, vibration to form, heat treatment, and installing hoisting rings. The present invention can prolong the life of the lining, raise productivity of continuous casting and lower production cost.

Description

Technical field: [0001] The invention relates to a prefabricated lining body in iron and steel enterprises and a preparation method thereof, in particular to a prefabricated integral lining body of a continuous casting tundish and a preparation method thereof. Background technique: [0002] At present, in steelmaking enterprises, although the continuous casting production process has been basically popularized, in the continuous casting production process, the commonly used method for the lining material of the intermediate ladle is to smear on the continuous casting production site, pound magnesia materials or masonry Silicon insulation board, magnesium prefabricated board. These methods not only increase the on-site management workload of the steel mill, but also bring great potential safety hazards. As far as its service life is concerned, if the masonry silicon insulation board is used, the life span is only 6 to 7 hours, and if the magnesia material is used, the life s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/10B22D41/02C04B35/047
Inventor 王文刚王有志
Owner 王有志
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