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A kind of molten iron heat preservation and cold solidification pellet containing plant fiber

A technology of plant fiber and cold-set pellets, applied in the field of thermal insulation materials, can solve the problems of carbon increase, environmental pollution, sulfur increase, etc., and achieve the effects of good foaming performance, good thermal insulation effect, and wide source of raw materials

Inactive Publication Date: 2014-10-08
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the existing technology's problems of environmental pollution, carbon increase and sulfur increase, and provide a method that not only has good thermal insulation performance, but also does not pollute the environment, has good slag accumulation performance, and is low in cost. Cold solidified pellets for hot metal insulation with comprehensive utilization and wide source of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A molten iron heat preservation pellet containing plant fiber, its raw materials and parts by weight are: 55 parts of discarded clay bricks with a particle size of ≤0.074 mm, 12 parts of rice husks, corn stalks with a length of no more than 10 mm and a diameter of no more than 3 mm: 15 parts, clay: 8 parts, bauxite cement: 10 parts, plus water: 3 parts.

[0018] After mixing evenly, pressurize to form oval or round cold solidified pellets, and dry them for later use. After testing, the crushing strength of multiple cold solidified pellets is 2190N.

Embodiment 2

[0020] A molten iron heat preservation pellet containing plant fibers, its raw materials and parts by weight are: 62 parts of discarded high-alumina brick powder with a particle size of ≤0.074 mm, rice husk: 8 parts, reeds with a length of no more than 10 mm and a diameter of no more than 3 mm Rod: 14 parts, clay: 13 parts, ordinary portland cement: 3 parts, plus water: 4 parts.

[0021] After mixing evenly, pressurize to form oval or round cold solidified pellets, and dry them for later use. After testing, the crushing strength of multiple cold solidified pellets is 1892N.

Embodiment 3

[0023] A molten iron heat preservation pellet containing plant fiber, its raw materials and parts by weight are: a mixture of discarded clay bricks with a particle size of ≤0.074mm and high-alumina brick powder in any proportion: 70 parts, rice husk: 0 parts, and the length does not exceed 10mm And broken straw fibers with a diameter not exceeding 3mm: 15 parts, clay: 5 parts, ordinary Portland cement: 10 parts, plus water: 4 parts.

[0024] After mixing evenly, pressurize to form oval or round cold solidified pellets, and dry them for later use. After testing, the crushing strength of multiple cold solidified pellets is 2210N.

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Abstract

The invention discloses a molten iron heat-preservation and cold-setting pellet containing plant fibers. The molten iron heat-preservation and cold-setting pellet comprises the following raw materials in parts by weight: 55-70 parts of waste clay bricks of which the particle size is less than or equal to 0.074 mm or high-aluminum brick powder or a mixture consisting of the waste clay bricks and the high-aluminum brick powder according to any proportion, 0-20 parts of rice husk, 3-15 parts of plant fibers, 5-15 parts of clay, 3-10 parts of alumina cement or common portland cement or a mixture consisting of the alumina cement and the common portland cement, and 3-5 parts of external additive. The raw materials are readily available and low in cost; the problems of high dust content, pollution to the environment and large using amount of a conventional heat preservation agent are solved; and the molten iron heat-preservation and cold-setting pellet has the characteristics of high foaming property and good heat preservation effect and is suitable for molten iron heat preservation of molten iron ladles or torpedo ladles.

Description

technical field [0001] The invention relates to a thermal insulation material used in the metallurgical industry, in particular to cold-set pellets for molten iron thermal insulation. Background technique [0002] After the blast furnace is enlarged, the volume of ladles and torpedo tanks carrying molten iron also increases, and the temperature decreases during the transportation of molten iron. The heat loss increases the cost of steel products, which is not conducive to energy saving and consumption reduction. The function of the molten iron thermal insulation covering agent is to use the porous coating formed on the surface of the molten iron to play the role of thermal insulation. At present, there are many kinds of thermal insulation covering agents for hot metal in China, such as perlite, carbonized rice husk, and vermiculite. The main raw materials used in traditional thermal insulation covering agents have defects in thermal insulation and heat insulation performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00B22D11/111
Inventor 徐国涛裴汉刚
Owner 武汉钢铁有限公司
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