Dry Vibration Mix
This
product is mainly used for tundish lining, which is the 3rd generation
of high-tech product following insulation board and tundish coating, and
this product is characterized by convenient construction, without
baking and long service life.
Monday, November 24, 2014
Brown Alumina Brick
Brown Alumina Brick
Composed
of brown alumina brick and sic and added fines, the product is of new type
compound brown alumina brick sintered at reducing atmosphere and molded
at high pressure. Besides molten iron resistance, strong alkali
resistance and erosion resistance, the product is characterized of self
repairing, providing longer service life, which is available for both
ceramic cup and blast tuyere of large and middle Before.
Al2O3-SiC-C Brick For Hot Metal Ladle And Torpedo Car
Al2O3-SiC-C Brick For Hot Metal Ladle And Torpedo Car
Al2O3-SiC-C brick, with corundum, bauxite, silicon carbide and graphite as raw materials, phonetic resin as binder, added with expansive agent and modifying agent, is characterized by good thermal shock resistance, good erosion resistance, and non-sticking slag. It is used for torpedo car and hot metal ladle, and can meet request of customers
Refractory materials commonly used in neutral and alkaline induction furnace
Neutral and alkaline lining is used only for induction furnace capacity of less than 10 tons. The cost is much higher than the acidic lining lining, so must meet the smelting efficiency is very high to the economy. Neutral and alkali furnace refractory material is sexy:
(1) Sintered magnesia. The erosion of the sintered magnesia against molten metal and slag is very good, and high refractoriness, disadvantage is the contraction occurred two times during sintering, resulting in cracks and voids. Risk also contained the fully sintered, affect the elastic. Cause of crack;
(2) Fused magnesia. Electric volume stability of fused magnesia is good, but expensive than sintered magnesia.
(3) Magnesia - alumina - spinel. Magnesia - alumina - spinel due to volume expansion appears in the formation of spinel, so as to compensate the shrinkage of magnesia. Degree of expansion by the number and shape of corundum and mineralizing agent control. (4) Chrome magnesia - alumina - spinel. Chrome magnesia - alumina - spinel besides the advantages of the spinel, also has good thermal stability;
(5) The calcium oxide crystallization. Calcium oxide crystallization created favorable conditions for dephosphorization and desulfurization, but easy to crack, and cooling easily. In addition, the stove temperature will absorb moisture, so it is in danger of hydration. The crystallization of calcium oxide lining can neither be ramming material, also can not be made into bricks used in induction furnace.
Thursday, November 13, 2014
Refractory Fiber Felt,Fiber Felt,Ceramic Fiber,Refractory Fiber,Fiber Blanket,High Temp Refractory
Refractory Fiber Felt
Refractory fiber felt, castables and refractory pouring products are one of company. They are widely used in industry kilns and have gotten well power saving effect. The standards of refractory insulating fiber products are as below
Refractory fiber felt, castables and refractory pouring products are one of company. They are widely used in industry kilns and have gotten well power saving effect. The standards of refractory insulating fiber products are as below
Alumina-SiC-C Brick For Hot Metal Ladle,Ladle Refractory,Sic Refractory,Refractory Brick,Firebrick,Fire Brick,Alumina Brick
Alumina-SiC-C Brick For Hot Metal Ladle
Al2O3-SiC-C brick, with corundum, bauxite, silicon carbide and graphite as raw
materials, phonetic resin as binder, added with expansive agent and
modifying agent, is characterized by good thermal shock resistance, good
erosion resistance, and non-sticking slag. It is used for torpedo car
and hot metal ladle, and can meet request of customers.
Low Creep High Alumina Brick,Low Creep Brick,High Alumina Brick,Firebrick,Fire Brick,Refractory Brick
Low Creep High Alumina Brick
Mainly composed of special level bauxite chamotte as starting material and assisted with special additives, the brick are processed by moulding under high pressure and sintering under high temperature, with features like large heat accumulating capacity and small creep rate. They are avail able for blast hot stove matched of middle and small blast furnace.
Special high-temperature refractory bricks
In warship power device of large, marine fuel boiler is the heart of it, if the refractory brick hearth collapsed, the warship will be unable to sail, and can not be repaired in a short period of time, will cause the occurrence of very great accident, so can the development of a new type high-temperature refractory bricks then, we can avoid this situation happened. The special high-temperature refractory bricks must withstand strong fire baking, how high willthe fire resistance? This is something we must do the experiment, the general point of gold is already very high, but the refractory brick to withstand temperature must also high than its melting point can be.
General refractory temperature can reach 1500℃ even a super high temperature refractory material, but for many refractory materials, the degree of every increase of 50℃ would have been difficult to exceed. Like this on the battleship using ultra high temperature refractory brick products, even the best domestic refractories and refractory brick, the use of such to any field can play a very good advantage. It is not only the heat resistance is good, the service life of the refractory material in general than is relatively long compared.
Special high-temperature refractory brick is refractory and heat insulation, practicality is very strong, and compared to the refractory brick in general, this ultra high temperature refractory brick products can not be surpassed. More content about refractory brick, please contact us http://www.chinafirebrick.com.
Tuesday, November 4, 2014
Refractory castable material inspection before construction
Construction of casting material before should strictly check the following:
1. Casting material construction is made of steel or hard wood templates are available. The template must be of adequate strength, good rigidity, not out of shape, do not shift, no leakage of slurry. Steel template to mold release agent. Wood template to brush waterproof paint. The repeated use of the template to cleaning, painting can be used.
2. Water, pouring material should be strictly according to the manual control, shall not exceed the limit. Under the premise of ensuring the construction performance, the amount of water should be less than.
3. Castable refractory mixing time should not less than 5 minutes. The operation to the use of forced mixer. Mixing should first dry mix, then add 80% dosage of water mixing, and then depending on the extent of wet and dry, gently stir until the remaining water, obtaining suitable work consistency so far. Stirring casting material different should first mixer clean.
4. Pouring material must use the whole barrel bag full of. Stirring casting material generally good must be used within 30 minutes. Drying at high temperature working environment should be appropriate to shorten this time. Already first castable coagulation even caking not poured into the mould, nor of mixing water reuse.
5. If the project inspection unqualified should deal with qualified rear can construction. Expired materials shall not be used. Construction of castable to ensure that no power outages not interrupted construction.
1. Casting material construction is made of steel or hard wood templates are available. The template must be of adequate strength, good rigidity, not out of shape, do not shift, no leakage of slurry. Steel template to mold release agent. Wood template to brush waterproof paint. The repeated use of the template to cleaning, painting can be used.
2. Water, pouring material should be strictly according to the manual control, shall not exceed the limit. Under the premise of ensuring the construction performance, the amount of water should be less than.
3. Castable refractory mixing time should not less than 5 minutes. The operation to the use of forced mixer. Mixing should first dry mix, then add 80% dosage of water mixing, and then depending on the extent of wet and dry, gently stir until the remaining water, obtaining suitable work consistency so far. Stirring casting material different should first mixer clean.
4. Pouring material must use the whole barrel bag full of. Stirring casting material generally good must be used within 30 minutes. Drying at high temperature working environment should be appropriate to shorten this time. Already first castable coagulation even caking not poured into the mould, nor of mixing water reuse.
5. If the project inspection unqualified should deal with qualified rear can construction. Expired materials shall not be used. Construction of castable to ensure that no power outages not interrupted construction.
Formation of smelting furnace slag layer
Infiltration of molten
state in refractories copper matte with good mobility. Due to the
surface in the reaction tower refractory lining is covered with a layer
of dense with magnetic iron oxide for hanging slag layer is mainly
composed of, so he struck the wall surface matte does not directly
penetrate into the brick body, but first of all along the silicate slag
channel infiltration within the material and the interaction and slag,
slag at different depth generate Cu or Cu2O material.
Reaction tower wall surface slag although direct intrusion effectively prevents the copper matte, but did not completely eliminate the erosion caused by the matte of lining. Through the slag layer, there are still a small number of matte can penetrate through, and then along the brick body pores or cracks penetrate within the capillary channel brick. Because of the more close to the brick center, oxygen potential is higher, so into the brick body after the copper matte is prone to oxidation reaction. After reaction, the generated Cu2O exists between the lining the main crystal and the matrix, and no penetration into the other grains.
Molten copper oxide (CuO-Cu2O at 1140 DEG C when the low total soluble) will cause the increase of permeability brick thermal conductivity, the resulting expansion of strong diathermy, lining spalling and, in which Cu is oxidized to CuO, the volume expansion of 75%; oxidized into Cu2O, volume increased by 64%. Therefore, from the microscopic structure, corrosion of matte on the reaction tower lining is mainly for the chemical structure of permeability, copper matte and the resulting stress reaction.
Reaction tower wall surface slag although direct intrusion effectively prevents the copper matte, but did not completely eliminate the erosion caused by the matte of lining. Through the slag layer, there are still a small number of matte can penetrate through, and then along the brick body pores or cracks penetrate within the capillary channel brick. Because of the more close to the brick center, oxygen potential is higher, so into the brick body after the copper matte is prone to oxidation reaction. After reaction, the generated Cu2O exists between the lining the main crystal and the matrix, and no penetration into the other grains.
Molten copper oxide (CuO-Cu2O at 1140 DEG C when the low total soluble) will cause the increase of permeability brick thermal conductivity, the resulting expansion of strong diathermy, lining spalling and, in which Cu is oxidized to CuO, the volume expansion of 75%; oxidized into Cu2O, volume increased by 64%. Therefore, from the microscopic structure, corrosion of matte on the reaction tower lining is mainly for the chemical structure of permeability, copper matte and the resulting stress reaction.
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