Production Characteristics And Solutions Of Metallurgical Industry

       

From ore to metal materials, the
metallurgical industry goes through multiple production links, such as mining,
transportation, storage, crushing, classification, separation, liquid-solid
separation, pelletizing, sintering, smelting, casting, refining and so on. The
main equipment in each link is under extremely bad working conditions such as
high wear, high load, high temperature and corrosion. These factors lead to the
failure of production equipment, making the metallurgical industry a major
consumer of consumables and energy in the national economy. Faced with this
situation, in order to maintain production, a large number of spare parts must
be consumed every year, and some still need to be imported. A large iron and
steel enterprise has to pay more than hundreds of millions of yuan every year.
On the other hand, modern metallurgical production is a highly continuous
process. Even if the equipment in each part of the production link fails
prematurely, it will also cause shutdown or reduction of production and bring
huge economic losses.

Then we can adopt the method of high
temperature oxidation resistant coating. What are the functions of high
temperature oxidation resistant coatings? The high temperature resistant
coating is used to improve the high temperature performance of the matrix
(equipment or facilities) (the higher temperature can reach 1150 ℃) so that it
can withstand the high temperature chemical or physical dissolution process and
the erosion process of mechanical damage, or both. What are the requirements
for high temperature oxidation resistant coatings? In order to avoid the damage
caused by high temperature oxidation, these coatings must: prevent the
diffusion of oxygen in the atmosphere; Prevent the rapid diffusion of the
coating itself to the substrate; Having a melting point higher than the
operating temperature; Low vapor pressure at operating temperature. The
recommended spraying materials are nickel chromium alloy, nickel chromium
aluminum alloy, spray aluminum sealing and hot infiltration. The recommended
spraying methods include plasma spraying, high-speed flame spraying and
combustion flame spraying.

Application examples include furnace walls
of heating furnace, soaking furnace, heat treatment furnace, sintering furnace,
hot blast furnace, regenerative furnace and regenerator, and the surface of
metal grate; Annealing plate, annealing hood, heat treatment fixture, outer
surface of rotary kiln, high temperature valve, sliding gate, flue and chimney,
etc. Polysilicon furnace, sintered metal forming, exhaust muffler, blast
furnace tuyere, air supply system, sintering equipment, blast system, air
purification system, smoke exhaust system, annealing furnace roll, Franklin
furnace, hot metal impregnation heater, titanium strip, forging tools, heating
hood, coke oven sealing device, blast cooling system, converter oxygen supply
system, coke oven tuyere Continuous casting roll and cooling sand mold, etc.

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powder, spraying coat powder, or WC based powder, you may search online
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