The Repairing Problems Of Rotary Kiln Lundai
The rotary kiln company has developed a name for 'FGM' new materials
, namely dispersion aggrandizement is compound metal gradient function of new materials, this is a group of special alloy powder series, it is easy to melt sex, easy and base material fusion, concurrently at the same time, impact resistance, abrasion resistance, heat resistance, corrosion resistance, and other comprehensive physical properties. Powder in the substrate surface to be formed after the fusion of the alloy, the metallographic organization with pearlite, martensite, austenitic and two-way resistant alloy primarily. Raymond grinding deposition rates.the by solid powder to liquid again into solid, base material metal surface oxides deoxidization, and produce low melting point of boron silicate class surfaced of slag, form protective film, make the melting of alloy and processed solid base material to metal metallurgical combination.
In this process, metal substrate surface to the molten metal penetration and diffusion, feeder Raymond grinding system sand blasting equipment, finally forms metallurgy penetration alloy layer. During construction, according to different base material pledges and combining layer, transition layer, layer, layer and work processing requirements of different level, the choice of the powder match melt apply. Repeated the above deposition rates.the process, can get organized density, with excellent hardness, strength and toughness of combining layer, make repair surface corrosion resistant to wear special strengthen purpose.
The rotary kiln cement industry LunDai's round of material and thermal the gender is poorer, and long-term in high temperature, heavy load operation, and work environment is more bad, general occurrence point corrosion corrosion fatigue sex or spalling more serious damage, repair, very difficult. There are mainly the following questions:
(1) pitting spalling.
Cement plant set vibrating screen equipment, such as ore dressing on the market is the main processing equipment, crushing equipment. LunDai often is by the roller and hold, roller and LunDai contact that produce very big for current stress, the stress is local high stress, LunDai in this ripple the long-term effects of stress, can produce fatigue pitting corrosion, pitting expanded, can produce large area of spalling and lignite dryer Raymond grinding milling equipment, the author have seen xiangfan new three the cement Co., LTD. Of the large area as high as spalling.
(2) crushing spalling. LunDai materials, generally are carbon steel or 35 SiMn, 42 CrMnSi materials, because the defects of casting, cause LunDai axial hardness is not even, organization is not consistent. In the high load, LunDai material to the organizational structure of the loose, hardness is low, there have crushing, edge, sag. In addition, because of the casting defects, cause hypodermic and empty, large areas of loose, sand holes etc, also can cause spalling and creasing.
(3) fracture. LunDai radial or axial fracture, radial the whole completely cut off, inside the arc changes, the scene is difficult to repair, axial crack, not fully opened, can think of a way to repair.
rotary kiln: http://www.hxjqchina.com/product-list_38.html
Cement plant: http://www.hxjq-crusher.com/62.html
vibrating screen: http://www.hxjq-crusher.com/40.html
Iron ore concentrator: http://www.hxjq-crusher.com/63.html
Clinker rotary kiln: http://www.hxjqchina.com/product-list_38.html
by: maggie
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