Non-sticking tundish dry material and production method thereof

A technology of dry material and sintered magnesia, applied in the field of refractory material industry, can solve the problems of non-normal application, poor slag corrosion resistance, difficult to unpack, etc., so as to improve the comprehensive utilization rate, improve the anti-sintering performance, and reduce resources. wasteful effect

Active Publication Date: 2013-11-27
廊坊森德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The crushed magnesia is configured as a normal magnesia tundish magnesia dry material, which will cause serious sintering and poor slag erosion resistance during the application process.
If the dry material is severely sintered and has poor slag resistance, it will be difficult to unpack and use less frequently during use, resulting in abnormal application

Method used

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  • Non-sticking tundish dry material and production method thereof
  • Non-sticking tundish dry material and production method thereof
  • Non-sticking tundish dry material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A non-bonded tundish dry material, the composition of the main material and additives is shown in Example 1 in Table 1, wherein the crushed sintered magnesia contains MgO: 85~90% by weight, SiO 2 :4~8%, Fe 2 O 3 : 1.5~4%, bulk density: 2.8~3.0g / cm 3 . The composite binder is composed of 40% dextrin and 60% solid resin powder.

[0025] The steps of a kind of preparation method of non-bonding tundish dry material are as follows:

[0026] 1. After the crushed sintered magnesia is sieved by 3mm and 1mm sieves, the particle size is 1~3mm and 0.088~1mm (of which ≤0.088mm ≤10%); it is ground into ≤0.088 by ball mill or other grinding equipment mm fine powder; process the waste electrode into 0~0.15mm fine powder;

[0027] 2. Weigh the ingredients according to the composition of the main ingredients and additives in Table 1, add them to the mixer and mix for 8~10min;

[0028] 3. After mixing evenly, bag and pack the finished products that have passed the inspection.

[0...

Embodiment 2

[0031] A non-bonded tundish dry material, the composition of the main material and additives is shown in Example 2 in Table 1, wherein the crushed sintered magnesia contains MgO: 85~90% by weight, SiO 2 :4~8%, Fe 2 O 3 : 1.5~4%, bulk density: 2.8~3.0g / cm 3 . The composite binder is composed of 30% dextrin and 70% solid resin powder.

[0032] The steps of a kind of preparation method of non-bonding tundish dry material are as follows:

[0033] 1. After the crushed sintered magnesia is sieved by 3mm and 1mm sieves, the particle size is 1~3mm and 0.088~1mm (of which ≤0.088mm ≤10%); it is ground into ≤0.088 by ball mill or other grinding equipment mm fine powder; crushed petroleum coke is processed into 0~0.15mm fine powder;

[0034] 2. Weigh the ingredients according to the composition of the main ingredients and additives in Table 1, add them to the mixer and mix for 8~10min;

[0035] 3. After mixing evenly, bag and pack the finished products that have passed the inspectio...

Embodiment 3

[0038] A non-bonded tundish dry material, the composition of the main material and additives is shown in Example 3 in Table 1, wherein the crushed sintered magnesia contains MgO: 85~90% by weight, SiO 2 :4~8%, Fe 2 O 3 : 1.5~4%, bulk density: 2.8~3.0g / cm 3 . The composite binder is made up of 25% dextrin and 75% solid resin powder.

[0039] The steps of a kind of preparation method of non-bonding tundish dry material are as follows:

[0040]1. The crushed sintered magnesia is sieved by 3mm and 1mm sieves to make particles with particle sizes of 1~3mm and 0.088~1mm (of which ≤0.088mm ≤10%); by ball mill or other grinding equipment, grind to ≤0.088 mm fine powder; process metallurgical coke powder into 0~0.15mm fine powder;

[0041] 2. Weigh the ingredients according to the composition of the main ingredients and additives in Table 1, add them to the mixer and mix for 8~10min;

[0042] 3. After mixing evenly, bag and pack the finished products that have passed the inspecti...

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Abstract

The present invention discloses a non-sticking tundish dry material adopting broken sintered magnesia and a low cost carbon-containing material as main raw materials, and a production method thereof. The used technical scheme is that the non-sticking tundish dry material comprises, by weight, 35-40% of 1-3 mm broken sintered magnesia, 18-25% of 0.088-1 mm broken sintered magnesia, 30-35% of broken sintered magnesia with a particle size of less than or equal to 0.088 mm, and 2-4% of a carbon-containing material with a particle size of less than or equal to 0.15 mm, the amount of a composite binding agent is 2-5% of the total weight of the main material, and the composite binding agent comprises 20-40% by weight of dextrin and 60-80% by weight of solid resin powder. The preparation method comprises screening, grinding, material preparing, mixing, inspection, packaging, and other processes. According to the present invention, the used aggregate is the broken sintered magnesia, such that the prices is low; and the carbon-containing material is introduced so as to significantly improve sintering resistance of the magnesia dry material, and avoid difficult tundish disassembly caused by adhesion of the work lining on the permanent lining due to sintering after tundish off-line.

Description

technical field [0001] The invention relates to the industrial field of refractory materials, in particular to a non-bonded tundish dry-type material and a production method thereof. Background technique [0002] The dry type material has the advantages of convenient construction, can be quickly baked or even used without baking, and the lining body is easy to disassemble. Therefore, more and more alkaline dry type material is used for continuous casting tundish work linings. At present, most dry materials are composed of high-quality magnesia, low temperature binder and medium temperature binder. Low-temperature binders generally use resins or other organic binders with a low melting point and can be cured below 300 °C, mainly to provide forming and demolding strength for the working lining; medium-temperature binders are generally sintering accelerators, which are produced at around 1000 °C. A small amount of low-melting phase or reacting with the main raw material to gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李志坚王林吴锋
Owner 廊坊森德科技有限公司
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