From the point of the working environment of cementite furnace, its job temperature is not very tall, of cementite heat temperature is 930 ℃ about, gradient of furnace temperature change is not tall. Accordingly, from the point of temperature requirement, can choose average fireproof data. However, cementite furnace is reductive cementite atmosphere, requirement build by laying bricks or stones begs build by laying bricks or stones to build fireproof material to have be able to bear or endure ooze sex, fireproof material can choose liner of body of build by laying bricks or stones brick of heavy qualitative tall aluminous cementite, heat-insulation layer can choose to be able to bear or endure gently character cementite brick, furnace door can choose to be able to bear or endure collision thermal stability is able to bear or endure well cementite brick. To reduce the heat loss due to radiation between brick of light qualitative impervious and steel armour, the insulation material with a thick 2540mm.
This furnace it is electric stove of a kind of new-style energy-saving heat treatment, component of main air feed undertakes aeriform cementite. Use exceed material of light-duty and energy-saving lining () of fiber of pottery and porcelain, use heat of compositive type water-cooling sealed type fan, temperature of heat of heat of this series cementite is even, warm up fast, after heat insulation, the cementite rate of workpiece is accelerated, carbolic situation atmosphere is even, ooze layer is even, furnace pressure is elevatory, also won't have any leak. Manufacturing efficiency and carbonization quality get rising. Vacuum cementite is current one of more advanced heat treatment methods on international, also be a development is rapid in recent years new technology. Vacuum cementite technology can be more accurate than traditional cementite method control carbon content, make cementite goods has better ooze layer uniformity and exterior quality, have the advantage such as energy-saving environmental protection, wide application received in the domain such as car, mechanical, spaceflight.
The heating up time of the uniformity of the temperature inside furnace and empty furnace is vacuum furnace heats the important sign of function. This one index basically depends on component of core of vacuum cementite furnace heats the structure of antrum, its design is reasonable, affect the manufacturing efficiency of the performance characteristics of body of heater and product directly.
Carbonization furnace is a kind of new-style environmental protection energy-saving model heat treatment furnace, it is steel main supply equipment, use at aeriform nitrogen to change. Quick furnace of wisdom labour trade is used exceed material of lightweight concrete lining and type of furnace of high grade water-cooling centrifugal fan is sealed, the furnace of series product cementite of promotion accuses rate of nitriding of lukewarm semmetry, fast heat preservation, steel to accelerate, when semmetry of layer of carbolic atmosphere semmetry, ooze, pressure increases, not flat, improved manufacturing efficiency and quality.
These are able to bear or endure material is commonly used wait for the firebrick with commonly used commonly used material to include AZS brick, corundum brick, magnesian chromic brick, carborundum brick, nitrogen to change silicon to contact carborundum brick, nitride at brick of cementite furnace silica brick, half silica brick, clay, tall aluminous brick, magnesia brick; The material such as Beryllium of chromium of hydrogenous oxidation calcium, oxidation, ferric oxide, magnesian, oxidation. Commonly used insulation material has products of heat preservation brick, asbestos, warming plate to wait. Commonly used material includes setting of fettling material, fire prevention material fireproof material, if irrigate,build material, plastic etc, fire prevention material but form of adventitious of material of spray of plastic, fireproof slop, fireproof material, lightweight concrete is fireproof material, if irrigate,build material, but plastic etc, fireclay.
The requirement that the distinction of impervious carbon brick and common firebrick depends on pair of ferric oxide content is extremely strict, general requirement is in 1% the following, expand because of the bulk after ferric oxide is reductive, what can promote the carbon below the brick is deposit, cause system of build by laying bricks or stones inattentive, flake, intensity drops and inchoate injury. Because use position,the weight of impervious carbon brick and intensity ask and different. Move of carbon of heavy qualitative impervious is used at the load inside furnace the place with big or frequent attrition, if orbit props up brick of foot of move, mouth, arch to wait; Move of carbon of light qualitative impervious is used at the place such as boiler setting, roof.
Cementite furnace has oxidation nitrogen atmosphere, fireproof material has formulary wall system permeate grade character, have the characteristic that permeates grade carbon brick, fireproof material can use wall body liner heavy tall aluminous firebrick; Insulation material can use lightweight concrete to permeate grade carbon brick; Mouth can use the osmosis with good impact resistance grade carbon brick.
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