Brick of heat preservation of light qualitative clay introduces

Brick of heat preservation of light qualitative clay belongs to insulation material, it is the small qualitative adiabatic products in fireproof material, commonly used at kiln furnace heat-insulation layer.


Brick of light qualitative clay can be used burn break a law, reduce firebrick density. Often use have curium wooden layer, charcoal, coal fines and other organic matter. Bleb law, the stoma in goods is the firebrick that uses bubble legal system to become, join the bubble place in pug to form. Also can use chemical method, air hole forms the gas that the agent is generation of chemical reaction place. The gas of the generation after using dolomite and vitriolic function is when producing argillaceous brick, the slop in infuse model is accumulated in the action private parts of bleb increase.
The characteristic of adiabatic and fireproof material is porosity tall, general 40%-85% ; Bulk density is low under 1.5g/cm3; thermal conductance low, general under 1.0W (M.K) . The heat-insulating material of furnace of kiln of its action industry, can reduce furnace kiln heat loss due to radiation, save the sources of energy, can reduce the quality of hot project facilities. Sex of caustic of intensity of machinery of adiabatic and fireproof material, wear-resisting and the aggressivity that fight broken bits is poorer, unfavorable at kiln furnace bearing structure and direct contact the place such as metal of slaggy, charging, melt.
Manage changes target

Brand	NG-0.6	NG-0.8	NG-1.0	NG-1.2
≥ of bulk density G/cm3	0.6	0.8	1	1.2
≥ of MPa of intensity of normal temperature compression	2	3	3.5	4.5
≤ of the heavy change that burn a line ℃ of 2% experiments temperature	1200	1250	1350	1350
Average temperature of thermal conductance W/m.k (25 ℃ of 350 ± )	0.25	0.35	0.4	0.5

Content of argillaceous brick Al2O3 is in more commonly 40 ％ above, fe2O3 content is less than 2 ～ 2.5 ％ . The grog in burden is 65 ～ 85 ％ , combinative clay is 35 ～ 15 ％ . Mix the combines clay and mill grog that smash grind, make up half dry pug together with grain grog again, high pressure shapes, firing below about 1400 ℃ , performance is better. Argillaceous brick shows weak acidity below high temperature.
Make do not burn clay to pledge bricky raw material is fly ash sinks gently bead, float bead, horniness clay and soft qualitative clay, bond can choose colophony of water glass, vitriolic aluminium, phosphoric acid aluminium, tall aluminous cement, phenolic aldehyde, modified resin to reach its complex matter. Its deserve to fall for instance: Fly ash floats hollowly bead 35〜50% , heavy bead + horniness clay 25〜30% , <15% of soft qualitative clay, compound bond <10% . Be in the raw material that make up mix grind undertake mixing practice inside machine. Order of feed in raw material: Float hollowly bead, heavy bead, horniness clay, soft qualitative clay, add bond finally. Mix experienced 15min, pug moisture control is in 10〜35% . Via stranding makings hind, with 20〜60t the machine that press a brick shapes. Adobe undertakes below 150〜200 ℃ dry, dry it is finished product namely to constant weight.
Argillaceous brick goods changes index cent to be normally (NZ) - 42, (NZ) - 40, (NZ) - 3 kinds of 38 brands. The shape size of argillaceous brick goods accords with GB2992-82 " size of general firebrick shape " regulation. The brick that square requirement did not need in be like a standard, press require square blueprint production. The cent of argillaceous brick goods accord with YB844-75 " the cent of refractory products with the definition " regulation. General component is mark model, general, different, special model, still can ask according to the user special make.
Production clay pledges main raw material of the brick is argillaceous light aggregate and argillaceous pink gently, burn lost property to be curium wood chip. Raw material asks as follows via the broken, granuality after smashing: Light aggregate: 0.25〜0.147mm<25% , <0.088mm>55% , argillaceous <0.088mm occupies 90% above. The screening that curiums wood chip has needed 1mm just can be used. Batch mixing undertakes on mixer. Order of feed in raw material: Add light aggregate and clay first, work after mixing 2min, rejoin water, wet after mixing 6min, go out makings. Pug moisture is 17〜20% .
After pug classics 24h expects tiredly, with attrition the machine that press a brick shapes. Desiccator of adobe classics channel undertakes dry, dry temperature is 80〜250 ℃ , moisture control is in adobe remains be less than 2% . Firing undertake in kiln pouring blaze, highest and firing temperature is 1250 ℃ , heat preservation 4h, natural cooling 24h is rear can give pit.