Kiln furnace heat preservation uses air brick

Heat preservation brick
Fireproof material chooses kiln furnace heat preservation the main body function of principle kiln furnace basically is decided by the technical economic performance of fireproof material, the investment cost that affecting kiln furnace directly, character of service, thermal efficiency, the sources of energy that run uses up charge to wait. Choose the general principle of fireproof insulation material: 1, the function of kiln furnace and hot project characteristic. The kiln furnace that works like clearance sex should choose the material with small thermal capacity. 2, intensity of system of the safe use temperature of material, heat conduction, high temperature, chemical stability. 3, use life. 4, investment expenses upholds charge with what move. Generally speaking, the fireproof material that pledges again emphasizes particularly on quite some specifications index, wait like high temperature stability, chemical stability; Be able to bear or endure to pledge insulation material pays attention to investment and the integrated technology economic norms that move more gently.
What does the product with kiln furnace commonly used heat preservation have? The brick of light qualitative clay that heat preservation of 1 high temperature tells before adiabatic and fireproof material, light qualitative tall aluminous brick, light qualitative alumina pledges brick, gently silica brick, alumina is fireproof and hollow all sorts of ball, fireproof fiber all belong to high temperature heat preservation heat insolation of lukewarm heat preservation is fireproof in fireproof material.2 material 2.1, after bulk expands greatly, a kind of gets density is very small (can small to 60 Kg/rr13) advanced insulation material, this kind of material can be used as powdery makings (fill up between body of furnace build by laying bricks or stones and furnace casing) , but majority adds the cementing agent such as water glass, cement or phosphoric acid, via shaping, firing wait for working procedure, make heat preservation brick or heat preservation bead use. Good with the function of brick of pearlite heat preservation of phosphoric acid cementation, use temperature can amount to 1000 ℃ , density has 200kg/m3 only, coefficient of thermal conductivity is very small also (0. 05+0.29×10tW/(m ℃ ) ) . The brick of pearlite heat preservation that uses cement and water glass cementation is fireproof degree poorer, former use temperature is 800 ℃ , latter is 650 ℃ . 2.2 vermiculite vermiculite is an appearance mineral like mica, its chemistry composition is (MgFe)2. (H20)2. (SiAIFe)4010. 4H20, melting point is 1300~1370 ℃ . Vermiculite is mineral the bulk when heating expands greatly, become bulk density very small (0.1~0. The inattentive stock of 3g/cm3) , call expand vermiculite. Its permission works temperature can amount to 1000 AC, coefficient of thermal conductivity is very small (0.05~0.06W/(m ℃ ) ) , it is a kind of good insulation material. Expand vermiculite matchs with right amount aluminous cement, water glass or bitumen make cementing agent, can make heat preservation brick use. But the affiliation as a result of cementing agent, performance characteristics is reduced somewhat. If the use temperature of brick of water glass vermiculite drops,be 800 ℃ , coefficient of thermal conductivity is 0. 08~0.10W/(m ℃ ) , bulk density rises for 0.4~0.45g/cm3. Bulk density is big, body of furnace build by laying bricks or stones absorbs quantity of heat big, loss of accumulation of heat is small. 2.3 exceed brick of light qualitative clay to exceed the bulk density of the clay brick such as light qualitative tall aluminous brick to be 0.3~0. 4g/cm3, coefficient of thermal conductivity is 0. 23W/(m ℃ ) , be very good in lukewarm insulation material. Heat insolation of heat preservation of 3 low temperature is fireproof material 3.1 diatomite diatomite is alga machine content a kind when form after the corruption in the lithosphere poriferous and mineral, its bases is Si02, contain the impurity such as a few clay. The bulk density that diatomite pink expects is 0.6~0. 68g/cm3, coefficient of thermal conductivity is when 500 ℃ 0. 186~0. 23W/(m ℃ ) , can make material of heat preservation fill. Exceed the diatomite brick grog that pledges diatomite brick passes with to calcine normally gently to give priority to, add unripe diatomite or clay to make bond be made again, with the brick that clinker makes, remains of the bulk when using is contractive and lesser. Cent of diatomite insulation material is class of A, B, C3, class A performance is good, density is (50050) Kg/m3, apparent pore rate is 78. 3% , coefficient of thermal conductivity is (0.07+0. 21) X10 -3t. The use temperature of the diatomite brick of 3 kinds of grade all is under 900 ℃ , heat preservation performance is poorer than vermiculite. The serpentine that 3.2 asbestine asbestine is the fiber structure that have pliable but strong and bears fruit or amphibole kind mineral, its chemistry is comprised is magnesium, iron and partial calcium and natrium the hydrous silicate that wait, structural formula is 3Mg0.2Si022H20. Asbestine has lesser bulk density and thermal conductivity, the bulk density of pink of consistent class asbestine is in 0. 6g/crj13 is the following, coefficient of thermal conductivity is less than 0. U7W/(m ℃ ) , it is the stuff with heat preservation better performance. But the heat-resisting of asbestine is spent poorer, 500 ℃ begin to lose crystallization water and bring about intensity to reduce; Heat become contractive when 700~ 800C.
Kiln furnace heat preservation uses air brick is wait with clay, shale for main raw material, course material handling, shape, agglomeration is made. The hole gross area of air brick occupies his to be in the percentage of bricky area, call the hole rate of air brick, should be in commonly 15% above. Air brick and sincere brick photograph are compared, can save much land to be mixed with earth bake bricks fuel, reduce carriage weight; Reduce the labor intensity when making brick and build by laying bricks or stones build, accelerate construction plan; Reduce a construction self-prossessed, add tall building number of plies, reduce cost.
Flourish Cheng Naicai regards professional fireproof material manufacturer as the home, quality is good, the price is low, flourish Cheng Naicai uses the manufacturing technology of automation and device, introduce advanced management and qualitative check system, ensure each batches of fireproof material can achieve the requirement of the user, product quality is worth you to trust.