The wearability of fireproof material is to point to material counteractive below high temperature environment mechanical wear, erode and the ability that chemistry erodes. The equipment in waiting for high temperature industry to metallurgy, glass, pottery and porcelain protects this one character crucial. The wearability of fireproof material is comprised by its and the structure decides, specific influencing factor is as follows:
One, the effect that fireproof material constitutes pair of wearability is chemical composition oxide: Fireproof material normally by one plant or a variety of oxide are formed, be like alumina (Al₂O₃ ) , magnesian (MgO) , oxidation silicon (SiO₂ ) etc. Alumina and magnesian the high temperature hardness that waited for oxide of high melting point to improve data and wearability. Alumina: Tall hardness and Gao Rong are nodded, use extensively at needing the situation of tall wearability. Magnesian: Have exceedingly good high temperature stability and the sex that fight broken bits, the high temperature corrosion environment such as smelt of iron of commonly used Yu Gang. Carbide: Be like carborundum (SiC) , carbonization is boracic (B₄C) etc, because of its tall hardness is mixed high temperature resistant function, in wear away the performance below serious environment is good. Carborundum: Very tall hardness and wearability, apply to the place such as tall tatty lining, slideway. Carbonization boron: Tall hardness and fight oxidation function goodly, apply at harsh environment.
Constitute single-phase material: Pure oxide or carbide, be like pure corundum (Al₂O₃ ) brick, have relatively even physics and chemical property. Composite material: By a variety of composition composition, optimize through small structure, be like corundum - Molaishi (Al₂O₃-SiO₂ ) compound brick, combine the advantage of a variety of photographs, promote the integral wear-resisting of material property.
Additive metal oxide: If oxidation is chromic (Cr₂O₃ ) , oxidation titanium (TiO₂ ) wait, can adopt change crystal structure or form aggrandizement photograph to raise wearability. Carbolic qualitative additive: Be like black lead, can enhance the heatproof shake sex of material and wearability, but also can affect fight oxidation function.
2, the influence of fireproof material composition to wearability brilliant photograph and composition of grain brilliant photograph: The main brilliant photograph in material decided its wearability. If corundum brick is main,comprise by corundum brilliant photograph, offerred tall hardness and wearability. Grain size: Petty and even grain structure conduces to raise wearability, big grain structure may bring about brittleness to increase, wearability drops. Grain form appearance: Acicular or piece shape grain can improve data fight concussion ability, but bring about possibly also on certain way change infirmly.
Micromechanism sends density: Send density material high to have taller wearability normally, of surface of the material in because porosity is low,reducing wear process weaken. Microstructure: Even and fine microstructure structure can disperse effectively stress, reduce local stress to center the destruction that bring about.
Tie photograph and appearance of foreign matter band: The existence of appearance of band of pottery and porcelain or vitreous band appearance can affect the integral wearability of material, combinative appearance intensity is higher, wearability is better. Foreign matter: If the impurity such as Fe₂O₃ can affect the purity of material and performance, reduce wearability.
Hole and micro-crack hole: The hole in material decreased to bear the weight of effectively area, reduced wearability, the gas in the hole below high temperature expands to bring about material craze possibly still. Micro-crack: Micro-crack will be patulous when material gets power, bring about wear away aggravate.
3, wearability test and attrition of applied test method wear away experiment: Measure the wear extent that material plays in specific requirement through attrition test meter. Concussion wears away experiment: The material below imitate high temperature gets percussive wear out condition. High temperature corrodes an experiment: The wearability of material and corrosion resistance check in environment of high temperature chemistry.
Representative application metallurgical industry: The data of need tall wear-resisting such as wall of furnace of blast furnace lining, converter lining, electric stove will resist of molten iron, molten steel erode and erode. Cement industry: Tall wearability of requirement of rotary kiln liner, in order to answer the high temperature abrasion that kiln expects. Vitreous industry: Material of frit kiln liner needs to be able to bear or endure to the high temperature that gets vitreous juice is corroded and wear away.
4, optimize with future development direction material optimizes modified: Pass add microelement or add wild phase, optimize the composition of material and structure, raise wearability. Accept rice technology: Material of applied accept rice and tradition of modified of accept rice technology are fireproof material, promote its wearability and integral performance.
Craft of production technology agglomeration: Optimize firing temperature and craft parameter, reduce hole rate, raise material to send density. Compound craft: Use design of polyphase composite material, the integrated wearability that improves data and high temperature resistant function.
Environmental protection and but durative green material: Develop the low pollution, fireproof material that can reclaim, reduce the effect to the environment. Second birth uses: The second birth that drives fireproof material is used, reduce resources waste and environmental burden.
The wearability of fireproof material basically depends on its chemistry composition and micromechanism. Through optimizing structure of photograph of the chemical composition of material, brilliant and microstructure, can raise the wearability that material issues in high temperature environment significantly. Future, as the promotion of the progress of material science and workmanship, the wear-resisting function of fireproof material will increase further, in order to satisfy increasingly complex the industrial demand with Yan Ke.
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