Hign Alumina Bricks high quality

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In aqueous alumina minerals (monohydrate diaspore, sanshui diaspore, etc.) as the main composition of high bauxite;

The family of sillimanite minerals (including kyanite, andalusite, sillimanite, etc.);Synthetic raw materials, such as industrial alumina, synthetic mullite, fused corundum and so on.China high alumina bauxite resources, quality is good, producing area are mainly distributed in shanxi, henan, hebei, guizhou,

shandong and other places.Produced by high aluminium vanadium and soil, mainly diaspore monohydrate (alpha Al2O3 · H2O) and kaolinite and the mixture of two kinds of minerals.\ n high bauxite with rotary kiln and vertical kiln calcination, sintering temperature of 1500 ~ 1700 ℃.

Sintered bauxite, bibulous rate is in commonly 4 to 7%。

3 oxidation 2 aluminium (Al2O3) content higher than 48% of the silicate aluminum refractory products.Such as Al2O3 content higher than 90%,

called corundum brick.Due to different resources, the national standard is not entirely consistent.Such as European countries for high aluminum

refractory Al2O3 content lower limit is 42%.In China, according to the high alumina bricks are usually divided into three classes: Al2O3 content in Ⅰ etc. ─ ─ the Al2O3 content > 75%.Such as Ⅱ ─ ─ Al2O3 content is 60 ~ 75%;Such as Ⅲ ─ ─ for 48 ~ 60% Al2O3 content.
The raw material According to the resource conditions and different requirements for products, can use the following categories of the material: with water alumina minerals (monohydrate diaspore, sanshui diaspore, etc.) as the main composition of high bauxite;The family of sillimanite minerals (including kyanite, andalusite, sillimanite, etc.);Synthetic raw materials, such as industrial alumina, synthetic mullite, fused corundum and so on.China high alumina bauxite resources, quality is good, producing area are mainly distributed in shanxi, henan, hebei, guizhou, shandong and other places.Produced by high aluminium vanadium and soil, mainly diaspore monohydrate (alpha Al2O3 · H2O) and kaolinite and the mixture of two kinds of minerals.
High bauxite with rotary kiln and vertical kiln calcination, sintering temperature of 1500 ~ 1700 ℃.Sintered bauxite, bibulous rate is in commonly 4 to 7%.

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Q:What are the specific raw materials for plastic pallets?
There are two kinds of raw materials for plastic pallets: one is polypropylene (PP) and the other is polyethylene (HDPE).Plastic pallets for logistics storage: pp+pe material, recycled material 10%;Plastic trays for food trays: food grade PP, PE, pc;Polyethylene (HDPE) has excellent impact resistance and cold resistance, and it can resist environmental stress cracking. Excellent chemical stability, good oil resistance. Water absorption and tiny, low permeability, organic vapor transmission rate is larger. Electrical insulation is good, in all frequency range, dielectric properties are extremely excellent.
Q:What refractory material does cupola lining use?
It's made of high quality refractory material: 1770 ~ 2000 centigrade.
Q:The difference between aluminium refractory and magnesia refractory
Aluminum refractory belongs to neutral refractory material, usually refers to silicon aluminum refractory materials, such as: high alumina brick, clay brick, high alumina castable and other products, the production of raw materials is mainly bauxite.
Q:Are there any differences between insulating bricks and refractory bricks?
Heat preservation brick is to emphasize its heat preservation performance generally, not paying much attention to its refractoriness, but refractory brick is exactly the opposite. Different locations will use different materials, I hope we can choose carefully.
Q:How are the high alumina bricks fired?
Generally, the high alumina bauxite is added with a small amount of clay. After being ground, the gas is injected and shaped in the form of slurry by the way of gas attack or foam, and it is burnt at 1300~1500 DEG C. Sometimes industrial alumina can be used to replace part of bauxite clinker. Used for lining and thermal insulation of masonry kilns, as well as for areas where there is no high temperature, high melting material erosion and erosion effects. When touching the flame directly, the touch temperature shall not be higher than 1350 degrees.
Q:What are the high aluminum bricks made of?
It's OK to use corundum bricks and alumina hollow ball bricks to build a furnace,
Q:What is the apparent porosity of high alumina brick?
Total porosity is porosity refers to the total volume of sample porosity in the percentage of total volume of samples. Apparent porosity refers to the percentage of the total volume of openings, pores, and total specimens in the sample.
Q:What is fireproof concrete?
Silicate fireproof heat-resistant concrete using temperature can reach 700 DEG ~800 DEG, the main mechanism of its heat is dehydrated calcium hydroxide silicate hydrates series of cement clinker under high temperature, the calcium oxide and slag and mixing activated silica material in the three and two aluminum oxide and the reaction of anhydrous calcium silicate and anhydrous aluminum acid calcium has strong heat resistance, the fire resistance of concrete is a certain. Such as the use of high alumina bauxite and broken bricks, magnesia brick and magnesia for fireproof heat-resistant concrete materials with the highest using temperature can reach 1100 DEG C.
Q:Difference between low creep high alumina brick and ordinary high alumina brick
The emphasis is on the physical and chemical indexes of low creep and high alumina bricks. The physical and chemical indexes of the high alumina bricks are different, too. They are DRL-1550And LZ-75 perform GB GB/T2988-2012
Q:What is the content of free silica in the refractory bricks of high alumina bricks?
Refractory powders are not rich in free silica in varying degrees

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