General purpose high alumina brick

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Product Description:

一般用途高铝砖

项目
item

LZ-75

LZ-65

LZ-55

LZ-48

Al2O3,%               不小于
                     Min

75

65

55

48

耐火度,℃           不低于
Refractoriness        min

1790

1790

1700

1750

荷重软化开始温度,℃ 不低于
RUL                   min

1520

1500

1470

1420

重烧线变化 % 1450℃x2h
P.L.C

0.31—-0.4(1500℃x2h)

0—-0.2

显气孔率,%          不大于
A.P.                 max

23

23

22

22

常温耐压强度         不小于
CCS                  min

53.9

49.0

44.1

39.2


Specification:


Product characteristics; General use high-alumina brick use yangquan bauxite clinker with high quality combined with clay and additives made from. Product has high refractoriness, good acid and alkali erosion resistance, high temperature strength, good thermal shock stability etc, and widely used in metallurgy, light oil, chemical industry, building materials, machinery, processing, thermal technology equipment of military industry and other industries.


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Q:What are the differences between high alumina brick and high alumina refractory brick?
High alumina brick is generally the national standard T-3 models, high alumina refractory brick is brick with more than 55% of aluminum content including special-shaped brick.
Q:What raw materials are used for refractory bricks
Phenolic resin, clay, powder and other materials, nitride materail, boron carbide, silicon carbide, silica raw material three, soil: fluorite, magnesia-alumina spinel Aluminum soil, calcium aluminate cement, corundum, andalusite, chlorite, silica solution, which is mainly divided into six categories, sillimanite, vermiculite refractory bricks raw material composition of refractory brick, there are many raw material kinds of refractory bricks, mullite, mine: Soil, Sialon, forsterite, pyrophyllite: Metal aluminium powder, ore, stone: Pottery, zircon sand, quinidine sulfate, dolomite, kaolin: The fifth raw material of chrome ore, sodium silicate, diatomaceous earth is the second raw material: Asphalt, sand, shale ceramisite. One of the raw materials, stone powder, the fourth raw material is magnesite, the sixth raw material is silicon metal powder refractory bricks, sand, kyanite, silica powder, aluminium oxide, aluminum sol, quartz sand, perlite, cenosphere, graphite
Q:is it good to use firebricks to preserve the heat of rto furnace? Is there any other good ideas?
Operating noise is very low, having a very strong chemical stability: The thermal conductivity is lower than 0 at normal temperature, it not only reduced the cost of the project of RTO furnace, but keeps the indoor heat dissipation heat better and reduce noise pollution. the temperature of RTO furnace surface is low after using the ceramic fiber lining to keep the heat, thereby reducing the addition of auxiliary fuel : ceramic fiber has a good thermal shock resistance: The dosage form of HLGX-589 and HLGX-312 ceramic fiber material is shown in figure RTO furnace thermal insulation material. C, good thermal shock resistance, without reserving expansion joints, ensure the lining intact, not easy to be affected by the harsh combustion atmosphere inside the RTO furnace, can deal with the temperature changes caused by periodic replacement of RTO furnace inlet. The furnace is new energy-saving furnace developped recent 30years that used for eliminating harmful exhaust gas caused by steel or paint spraying. it has long service life, high chemical stability, no heat preservation precedent for refractory bricks; B, good heat insulation effect.
Q:Scheme of cement kiln replacing 40 meter refractory brick kiln
If only replace refractory bricks, it just needs three days under the condition of 200 degrees. It will be simpler if there is only free water in the refractory brick (no pouring material).
Q:What type of refractory brick won't deform or crackbe for a long time in the temprature of about 1600 degrees?
1. , mullite poly light ball brick type, andalusite brick type: MJ-1600 MJ-1700 the temperature is higher than 1600 C. 3, the refractory bricks that won't deform or crack in the 1600 degrees Celsius for a long time includs the following several commonly used bricks: GMZ-80 GMZ-75 the temperature is higher than 1650 DEG C, 2, corundum mullite brick type
Q:How to prevent high alumina refractory brick from producing crack when reproduce high alumina refractory brick?
1-1, on the 1 in order to prevent the emergence of crack in the production of high alumina refractory brick. 2 is appropriate, the water absorption rate of the tube mill should be controlled below 6%, the excess air coefficient controlled between level 1 and 2. The water absorption rate of clinker of bauxite with high alumina controlled under 4%-5%, making the high aluminum refractory brick burning in a smoothly and steadily weak oxidation atmosphere, and should be adjusted by thermotechnic
Q:In tunnel kiln, what is the meaning of refractory proportion 2.0?
That is the volume density of the refractory brick
Q:is refractory brick used around the mechanism flue?
Q:Is the diameter of 2.5 meters of the calcium aluminate powder rotary kiln referred to the inner diameter of the refractory brick?
Perlite refractory brick is classified to outer diameter and inner diameter, pay attention to the accuracy of the size when measures, after drying, contains refractory. Our clay refractory bricks use 50% soft clay and 50% flint clay clinker, sodium to blend together according to a certain granularity requirements, after molding, etc., fireclay brick, 3373 in fact, there are many kinds of refractory bricks.
Q:Blend 12% fireclay and 88% refractory cement. Moderate water and mud are used to pile up firebricks?
Refractory bricks can irectly be liner. Lightweight mullite brick can be used for relatively longer time. If there is no mullite brick, use mud said above for some time, then continue to use by patching up.

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