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What are the types of refractory bricks?
There are many types of refractory bricks available. Those are Andalusite Bricks, Dense Silica Brick for Glass Furnace, Corundum Mullite Brick, Corundum Brick, Fireclay Brick for Coke Oven, Fireclay Brick for Blast Furnace, Low Creep High Alumina Brick for Hot Stoves, High Alumina Bricks for Blast Furnaces, General Refractory Fireclay Brick, General High alumina refractory brick, Insulating firebrick, Silica bricks-coke oven refractories, Magnesia brick, Magnesia Bricks for Cement Industry, High Alumina Bricks For Cement Industry, Fused cast Bricks, Sillimanite Bottom Blocks, Low Porosity Fireclay Bricks, Zirconia Bricks, General fireclay brick for steel industry, Refractory insulating fire brick B&C series, Insulating bricks etc.
What do you need to note while laying refractory brick?
Notes about Fire Bricks Laying During Furnace Construction1. Construct the furnace either by one kind of refractory brick or by two kinds of brick, the required matching percentage of brick in theory may differ from the actual percentage affected by distortion of cylinder. So there is no need to use bricks totally as the theoretical required amount while constructing the furnace. It's a key point to lay the big side of brick close to the cylinder when doing the construction, and the bricks should be laid straightly and there had better no gaps between each two bricks. Fill the gaps and distortion with mortar, the repair seam line should not be too hard in case of breaking of bricks.2. Abandon the twisted refractory bricks which are out of distortion standard, making sure that the bricks are tightly bonded and no looseness. While construct the furnace by bricklaying machine, the upper brick especially alkaline brick can not be given too much pressure, because alkaline brick's strength at normal temperature is relatively lower. Avoid bricks broken by uneven compression, so that to avoid kiln body falling off while working.3. While laying alkaline refractory bricks, watering or grouting the brick upper surface is prohibited. The well up cement mortar should be cleaned before it hardens.4. Construct the furnace strictly according to each brick matching method to avoid distortion of brick block and kiln body working out of balance, furthermore to avoid affecting working cycle.5. During the construction, check carefully and immediately both annular flatness and axial flatness according to the datum line in every circle and section. Parallel vertical seam line with furnace axis, parallel annular seam lines with each other, and make the parallel annular seam line vertical with the furnace axis. If the furnace body distorts or the refractory bricks are irregular, adjust the body by steel plate and the bricks by cement mortar. The steel plates should just fit with the bricks (the length and height of steel plate should be 5mm smaller than those of brick).6. When finish semicircle construction of the furnace, firstly check the deviation of vertical seam line with datum line and annular seam line with datum line, then lay one tier or two tiers of bricks, set up the mandrel and turn the furnace by 900. Construct the left half furnace on the other side, set up another mandrel while finishing one section. Turn the furnace after the mortar hardens.For more information about refractories, go to yilongrefractory.com
What is the Bulk density of refractory brick?
The bulk density of refractory bricks typically ranges from 2.0 to 2.4 g/cm³, depending on the composition and quality of the brick. This measurement indicates the mass of the brick per unit volume, and it is an important factor in determining the overall strength and insulating properties of the material.
How do you Seal brick fireplace?
Use refractory cement.... see above
What raw material are put into a blast furnace?
The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom. The raw materials require 6 to 8 hours to descend to the bottom of the furnace where they become the final product of liquid slag and liquid iron.
What are the chemical and physical indexes of magnesia carbon brick?
There are different grades of magnesia carbon brick. And it is usually used for the lining and tap hole of steelmaking converter, the sidewall and slag line of high power electric ARC furnace and ladle slag line.
What is linear change on reheating of refractory?
Linear change on reheating means that the size of refractory products is irreversible changed when the refractory products are heated to high temperature. A positive value indicates expansion which is called expansion of linear change on reheating; negative value indicates contraction which is called contraction of linear change on reheating. Zhengzhou Sunrise Refractory Co., Ltd. is mainly engaged in the research and development of refractory products.Sunrise can provide excellent quality refractory products which contain Fused cast AZS 33#,36#,41#, fused cast α-βalumina, fused cast high zirconia block, fused cast skid rail block, silica brick, glass mould brick, magnesia brick, zircon brick, zircon mullite brick, mullite brick, sillimanite brick, fused corundum brick, high chrome brick, chrome corundum brick, chrome AZS block. All products has passed the ISO international certified. Over 30 years producing and marketing experience, with reliable quality, competitive price and prompt delivery, Sunrise has established long-term business and cooperation relationship with many customers in different countries and regions. For any further information, Contact us, we will do our best to help you.
Best Fireplaces are made of what?
Brick is my favorite, but the firebox will be made of firebrick, and not ordinary building brick. Some people prefer the appearance of cut stone or field stone, but the firebox will still be firebrick (refractory brick)
What is a refractory table?
A refractory table has leaves at ends, not in center....Expandable.The correct name is a refectory (dining hall) table. The answer is basically correct for that term. Refractory describes heat resistant and/or insulating materials used in kilns, furnaces, wood stoves, etc (e.g. refractory brick). I suppose you could make a table out of firebrick.
What is cold-crushing strength of refractory materials?
cold crushing strength of a refractory brick is gross compressive stress required to cause fracture. Maximum Structural load that a material can withstand without fracture
What is cold crushing strength of refractory materials?
cold crushing strength of a refractory brick is gross compressive stress required to cause fracture. Maximum Structural load that a material can withstand without fracture
What is the significance of tracking the use of wet injection in blast furnace linings?
As a technical researcher who has worked in China's Speed Steel supply chain for 8 years, he is relatively familiar with this technology. The blast furnace lining wet injection technology can complete a 5500m³ blast furnace lining repair in a very short time (48h). And the service life can reach more than 1.5 years. This rapid maintenance mode has been fully recognized by most blast furnace users and plays a huge role in China's green ironmaking technology. The core of wet injection technology is "injection" rather than "spray". "Injection" means pouring without mold, and the effect of pouring is achieved by spraying. At present, the market is flooded with various wet spraying technologies and products, most of which are the dry spraying model, and the work is completed by spraying the material on the inner wall. In fact, concrete spraying technology has been developed in the construction industry for more than 100 years, and the spraying of unshaped refractory castables is not more complicated than building materials. It's easy to "spray out and stick to the wall" material, but it goes against the idea of wet injection of blast furnace linings. For the non-slab wall combined with the blast furnace cooling stave, the inner lining basically fell off during the middle repair, and there are still residual materials in the brick-inlaid groove of the cooling stave. Even if the smooth metal lining is not repaired, it can still keep going straight after the furnace is opened. The success of injection lining of a blast furnace is not simply to observe whether the blast furnace runs straight after opening, nor whether the surface is smooth or not after injection lining, but the actual data reflected after opening the furnace. The role of the blast furnace lining is to protect the cooling stave, and it is also the key to preventing excessive energy loss in the blast furnace. Under normal circumstances, the coke ratio and the comprehensive fuel ratio of the blast furnace will drop significantly after the injection lining is opened. Based on a large amount of practical experience, this reduction rate is about 15% to 18%; and the judgment of the life of the injection lining can also be inferred from these data. In order to achieve the effect of wet injection, a uniform stirring material and a stable pumping speed are required. The distance and angle between the gun head and the wall surface, the feeding amount, the feeding speed, the gas feeding amount and the coagulation accelerator amount, etc., the output will be stable when the injection material has the characteristics of the casting body. In the actual implementation process, the operator needs to be flexibly adjusted, so the early business training is very important. A good spray interface is not as smooth as a plastered surface, but rough and the particles are clearly visible. The steps of wet spraying can only be done from bottom to top like pouring, and cannot be sprayed piece by piece. Furnace shape, not longevity. The energy saving and consumption reduction of blast furnace is not simply to choose low-cost refractory materials. The development direction of wet injection technology is still more efficient, energy saving and longevity. Only by respecting research and development, technology, and market, rather than blindly imitating, can we promote the progress of core technology and obtain good market applications. Even if the smooth metal lining is not repaired, it can still keep going straight after the furnace is opened. The success of a blast furnace injection lining.
