Coking plant furnace is the fundamental facilities of cooking factory, it is a kind of structure complex the hot project facilities with serial production. Before already remark Jiao Lu is mixed by char room, firebox, regenerator, roof, chute, small flue the part such as the foundation is formed. Build by laying bricks or stones builds 58-f of a 42 aperture Jiao Lu to need fireproof material 6557t, among them silica brick 4352t, occupy 66.4% . Is Jiao Lu in 20? Inside operational cycle of 25 years, not easy heat builds major step system. Accordingly, build furnace to use fireproof data must the requirement that can get used to coking plant to manufacture technology, achieve prolonged reliable. Be based on the characteristic that coking plant produces, use fireproof data to building furnace, have the main demand of its oneself. The different position of anxious furnace body of heater, the assumes job, endured temperature, structure bear that bear the weight of, damage that suffer and medium are eroded etc criterion each are not identical, the fireproof data that so each place uses should have different property.
Jiao Lu is to be below isolation airy condition, heat coal 950-1100 ℃ , acquire facility of the successive job of coke and its by-product hot project via dry distillation.
The reason that anxious furnace lining mars is thermal stress action and mechanical wear, chemistry is eroded also is one of causes that cause lining to mar.
Because this is anxious the silica brick of fireproof material actor that furnace often uses, magnesia brick, tall aluminous brick and argillaceous brick, among them with silica brick dosage the biggest, the effect is best.
Silica brick belongs to acidity and fireproof material, have fight acidity goodly to erode ability, its heat conduction performance is good, loading bate temperature is high, be in commonly 1620 ℃ above, only fire spends Bijinai low 70~80 ℃ . The thermal conductivity of silica brick lift and increase of temperature as the job, contractive without remains, in drying-out process, silica brick bulk lift and increase as temperature. So, silica brick is the better fireproof product on Jiao Lu, contemporary large and medium-sized significant position of Jiao Lu (like firebox, chute and regenerator) build with silica brick build by laying bricks or stones.
Argillaceous brick is the clay that shows Al2O3 content is aluminous material of 30%~40% silicon acid simple product. Argillaceous brick is to use the soft qualitative clay of 50% and grog of 50% horniness clay, by certain size the requirement has burden, via shaping, dry hind, firing below the high temperature of 1300~1400 ℃ . Argillaceous brick belongs to weak acidity and refractory products, can counteractive acidity is slaggy with acidity gas erode, a bit poor to the counteractive ability of basic material. The hot performance of argillaceous brick is good, be able to bear or endure urgent cold urgent heat.
Tall aluminous brick is the refractory products that Al2O3 content is more than the siliceous aluminium of 48% or alumina to pledge, tall aluminium of a general designation is qualitative refractory products. Of tall aluminous brick fireproof spend and loading bate temperature all brick of prep above clay, function of the corrode that fight broken bits (be opposite especially acid slag) better, and these function rise as the addition of Al2O3 content, but thermal stability is inferior to argillaceous brick. Of tall aluminous brick send density tall, porosity is low, mechanical intensity is high and wear-resisting. Firebox furnace head and char room spread Jiao Lu the furnace head place of bottom brick, build with build by laying bricks or stones of tall aluminous brick, the effect is better.
Need the accretion of dosage to coke as iron and steel industry, jiao Lu is changing direction to develop to large volume. Large volume anxious furnace raised taller requirement to fireproof material. Current, anxious furnace silica brick is in develop to high strenth, high density and direction of tall thermal conductivity ceaselessly.
The partition between char room and firebox, when normal production, advocate the temperature that fire can be as high as 1550 ℃ above, this wall is the carrier that passes calorific requirement of coking plant place, this asks the material that build furnace should have performance of good high temperature heat conduction; This partition still bears the structural bear of body of upside build by laying bricks or stones and the gravity that roof installs tram, this asks the material that build furnace should have the property of changeless from lukewarm loading form; Char room metope gets again of ash content, slaggy, moisture and acidity gas erode, methane returns space of infiltration brick body to be in generation charcoal deposit, advocate igneous path bottom is changed by the broken bits of grime, contamination erode, this asks the material that build furnace should have high temperature to fight corrode function; Does temperature of metope of room of the char when installing coal drop quickly from 1lOO ℃ left and right sides 600? 700 ℃ , ask the material that build furnace should have the property of revulsion of counteractive high temperature in 600 ℃ above so; Because suffer,advance anxious influence, still ask brick of char room underside has taller wear-resisting property.
The great disparity of difference in temperature of wall of inside and outside of firebox furnace head, change of the temperature when installing coal is big, still get at the same time the action of the pressure of baffle, the it is better to fight temperature revulsion sex to be able to be mixed compression performance that this asks it is better to build furnace material to should be had.
Difference in temperature of the lower level on the checker brick that regenerator uses amounts to 1000 ℃ to control, ascendant air current and drop is the difference in temperature when air current in 300? Between 400 ℃ , this asks checker brick material should have bulk density character big, fight the characteristic with temperature revulsion strong capability.
Small flue is rising the temperature when air current under 100 ℃ , and in drop when air current criterion tower above 300 ℃ , gas path gets the brick normal temperature is gas the action with lunt, so both asks the material that build furnace should have the property that fights temperature revulsion below in 300 ℃ .
Anyhow, build by laying bricks or stones builds Jiao Lu to should have with fireproof material: Of use place of prep above of loading bate temperature most Zuo temperature; Inside span of use place temperature, have the capacity that fights temperature revulsion; Of all sorts of medium that can resist in use place the likelihood is encountered erode; The wall has char room firebox good heat conduction performance, checker brick has performance of good accumulation of heat to wait a moment. Of commonly used and fireproof material fireproof degree, temperature of bate of bear of density of thermal conductivity, hot expansile, stomatic house, bulk, high temperature, revulsion of stability of high temperature bulk, temperature is counteractive wait, jiao Lu should accord with a requirement with fireproof material.
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