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Converter body brick with titanium nitride added and preparation method thereof

A technology of titanium nitride and furnace body bricks, applied in the field of refractory materials, can solve problems such as product damage

Inactive Publication Date: 2019-01-25
海城利尔麦格西塔材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidation of carbon will form a decarburization layer. In the decarburization layer, the structure is loose and the pores become larger, making it easier for slag and oxygen to enter the interior of the product, further causing damage to the product

Method used

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  • Converter body brick with titanium nitride added and preparation method thereof

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Comparison scheme
Effect test

Embodiment

[0024] The following table of 3 kinds of embodiment formulas;

[0025]

[0026] Embodiment 1 The method for preparing converter body bricks, the specific steps are as follows:

[0027] 1) Ingredients: Weigh the raw materials according to the formula in the above table;

[0028] 2) Mixing: Turn on the high-speed mixer, first add the granules in the ingredients and dry mix for 5 minutes, then slowly add the binder phenolic resin and mix for 3 minutes at one time, then add 100 mesh flake graphite and mix for 2 minutes, and finally add the rest The fine powder is mixed together for 20 minutes and then discharged;

[0029] 3) Molding: The mixed mud is molded by 1100t pressure, and the four corners of the cloth are followed when molding, and the principle of lightness first and then heavy is operated;

[0030] 4) Heat treatment: The pressed semi-finished product enters the drying kiln for heat treatment for 24 hours, the temperature at the kiln entrance is 55°C, the preheating ...

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Abstract

The invention relates to a converter body brick with titanium nitride added. According to the physicochemical indexes of the converter body brick, MgO is greater than or equal to 75.0%, the volume density after baking at 200 DEG C is greater than or equal to 2.98 g / cm<3>, the apparent porosity is less than or equal to 4%, the compression strength is greater than or equal to 35 MPa, the linear change rate is 0-1.0%, and the high-temperature bending strength is greater than or equal to 12 MPa. The converter body brick is prepared from the following components in parts by weight: 32-34 parts of fused magnesite particles with the particle size larger than or equal to 3 mm and smaller than 5 mm, 16-20 parts of fused magnesite particles with the particle size larger than or equal to 1 mm and smaller than 3 mm, 13-17 parts of fused magnesite particles with the particle size smaller than 1 mm, 10-12 parts of 200-mesh fused magnesite fine powder, 1-3 parts of 200-mesh boron carbide fine powder,1-3 parts of 200-mesh titanium nitride fine powder, 10-13 parts of 100-mesh crystalline flake graphite and 2-4 parts of a binding agent of phenolic resin. According to the converter body brick, composite additives of boron carbide and titanium nitride are added, so that the oxidation resistance of the converter body brick is improved, the service life of the converter body brick is remarkably prolonged, and therefore the steel-making efficiency of a steel mill is improved, the steel-making cost is lowered, and the steel-making quality and safety are ensured.

Description

technical field [0001] The invention relates to a refractory material, in particular to a converter body brick added with titanium nitride and a preparation method thereof. Background technique [0002] Magnesia-carbon bricks are made of high-melting-point basic oxide magnesia (melting point 2800°C) and high-melting-point carbon materials that are difficult to be infiltrated by slag as raw materials, and various non-oxide additives are added. A non-burning carbon composite refractory material combined with a carbonaceous binder. As a composite refractory material, magnesia carbon brick effectively utilizes the strong slag erosion resistance of magnesia and the high thermal conductivity and low expansion of carbon to compensate for the biggest shortcoming of magnesia's poor spalling resistance. Its main features are: 1. Good high temperature resistance; 2. Strong slag resistance; 3. Good thermal shock resistance; 4. Low high temperature creep. Magnesia carbon bricks are mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/622C21C5/44
CPCC04B35/0435C04B35/622C04B2235/3821C04B2235/3886C04B2235/425C04B2235/77C04B2235/96C21C5/44
Inventor 尹斌王新杰范玉龙王志新
Owner 海城利尔麦格西塔材料有限公司
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