Kaifeng Gaoda Furnace Charge Co.,Ltd

• MOQ 1 Metric Ton

The alumina bubble produced by our company is a hollow spherulitic heat-insulating meterial, which is made by electrofused method. It is noted for its light-weight, heat-resistance, close pore. It is an ideal filler for high-temperatuerfurnaces and excellent aggregate of light weight castable refractory.it is also and ideal heat-insulating and energy-saving refractory. Index Properties Alumina Bubble Guarantee value Typical Value Chemical composition Al2O3 ≥99 99.2 SiO2 ≤0.2 0.18 Fe2O3 ≤0.15 0.10 NaO ≤0.4 0.3 Packing density（g/cm3） 0.5-1.0 0.85 Damaged rate (%) ≤15 12 Refractoriness (℃) 1790 Grain Size: （mm） 0.25-5，0.2-1，1-3，3-5，

• MOQ 1 Metric Ton

Fused Alumina-Magnesia Spinel, coming from high purity magnesia and alumina after smelt in arc furnaces at high temperature, has the following excellent characteristics, such as nice color and appearance, high bulk density, strong resistance to exfoliation and stable resistance to thermal shock, which enable the product to be widely used in rotary kilns, the roof of electric furnaces, ladles and metallurgical industries etc. Grain size: (mm) 0-1, 1-3，3-5, (mesh) 120, 180, 240, 320 Chemical & physical Properties: Type Index AM-70 AM-90 Guarantee Value Typical Value Guarantee Value Typical Value Chemical Composition % Al2O3 74-76 75 88-91 90 MgO 22-26 24 8-11 9 CaO ≤0.60 0.39 ≤0.4 0.25 SiO2 ≤0.30 0.28 ≤0.25 0.18 Fe2O3 ≤0.50 0.25 ≤0.5 0.26 Bulk density ( g/cm3 ) ≥3.20 ≥3.35 ≥3.30 ≥3.40 Grain Size ( mm ) 0-1; 1-3; 3-5; 5-8 ------ Fine powder ( mesh ) 120, 180, 240, 320 Etc. Packing 25kg/bag or 1000kg/bag Or according to customer request

• MOQ 1 Metric Ton

The White Fused Alumina produced by our company is made from industrial alumina melt in arc furnaces at high temperature. It is the basic raw material for manufacturing high temperature refractory materials, such as corundum, corundum - mullite etc and has been widely used in abrasion, metallurgical continuous casting, petrochemical and black carbon industries. Its properties are shown as following. Physical properties Chemical composition Guarantee value Typical Value Principle crystal phase: α-Al2O3 Al2O3 ≥99 99.30 Crystal system: hexagon Na2O/K2O ≤0.4 0.28 Colour and luster: white SiO2 ≤0.2 0.14 True density:≥3.95g/cm3 Fe2O3 ≤0.25 0.15 Packing density( g/cm3 ): 1.75-1.95 Mohs hardness: 9 Linear expansion coefficient (1/℃): 8.3*10-4 Grain size (mm) 8-5, 5-3, 3-1, 1-0 Fine power (mesh) -24, -120, -180, -240, -320 Or according to the customer's requirement. Pack: 25kg in plastic bag or 1000kg in big bags.

• MOQ 1 Metric Ton

Fused mullite produced by our company processes white color, strong resistance to thermal shock and abrasion, and many other properties. The product is also a high-quality raw material for producing mullite products, pushing plates and saggars for high-temperature furnaces, etc. Index Properties Fused mullite Guarantee value Typical value Chemical Composition % Al2O3 74-79 76 SiO2 20-25 23 Fe2O3 ≤0.2 0.1 R2O ≤0.5 0.4 Mullite phase % ≥95 Refractoriness （℃） ≥1800 Grain Size（mm） 0-1, 1-3, 3-5 Fine powder ( Mesh ) 80，120, 180, 240, 320，500etc. Packing 25kg/bag or 1000kg/bag

• MOQ 1 Metric Ton

Fused Calcium Aluminate Cement is melted in electric arc furnaces by adopting the excellent alumina and limestone as its raw materials. Its characteristics are stable quality, small water demand, fast and adequate hydration, early high strength, etc. It is the bonding agent for producing all kinds of high performance monolithic refractories. Type：AL-70, AL-80, AL-90 Physical-Chemical Characteristics： Index property AL-70 Al-80 AL-90 Chemical Composition ( % ) AL2O3 68-71 78-82 88-91 CaO ≤30 ≤20 ≤10 SiO2 ≤0.3 ≤0.3 ≤0.3 Fe2O3 ≤0.2 ≤0.2 ≤0.2 1day strength (Mpa) Compressive strength ≥40 ≥40 ≥18 Bending Strength ≥6 ≥6 ≥2.5 Specific Surface Area (cm2/g) ≥6000 ≥8000 ≥8500 Refractoriness （℃） ≥1790 ≥1790 ≥1790 EXP. (month) Exp. six to eight month Packing 25kg/small bag or 1000kg/big bag Use / Application Area Excellent gelation agent for unshaped refractories, it is suitable for refractory castable of low cement, self-flowing, pumping, gunning-repaire, castable refractories etc.

• MOQ 1 Metric Ton

Activated α-Al2O3 Micropowders, produced by our company, is calcined in a unique firing process by using excellent alumina as its raw material, selected composite mineralizing agents, and adopted superfine grinding technology. It has good properties such as, high inversion rate, good activity, small water demand, good fluidness, high bulk density, excellent thermal strength etc. It is an excellent filling agent and superfine powder coagulation binder for producing monolithic refractories. The product has been used in numerous famous manufacturers, and has gained good reputations. We can make all kinds of Activated α-Al2O3 Micropowders with different properties according to the customer's requirement. Main crystal phase:α Phase ≥95% Chemical analysis: AL2O3≥98.5% , SiO2≤ 0.2%, Fe2O3≤ 0.2% Fineness：D50≤0.7um( type A ) , D50≤2um ( type B) True specific gravity：≥3.92g/cm3 α-AL2O3 Micro powders Fineness Test upshot Samdens: 3.95(g/cc) Liqdens: 1(g/cc) Liqvisc: 0.0096(ccp) sed.height:0.5(cm) D50=0.54 um Dstoks=0.85 um D03=0.17 um D97=3.03 um D10=0.23 um D90=1.88um D25=0.33 um D75=0.97 um S.area=0 cm2/g Type A B Characteristics Name Active а-AL2O3 micropowders Active а-AL2O3 micropowders AL2O3 % ≥98.5 ≥98.5 SiO2 % ≤0.15 ≤0.15 Fe2O3 % ≤0.20 ≤0.15 D50 ≤1μm ≤2μm True specific gravity ≥3.92 ≥3.92 α-Al2O3 phase ≥95% ≥95% Marks: we also can producing different grain size according to the customer inquiry such as D50≤5μm, D50≤10μm etc.

• MOQ 1 Metric Ton

The tabular alumina produced by our company is a pure sintered α-Al2O3 that has been fully densified by rapid-sintering at high temperature. Tabular alumina has characteristic such as large well developed hexagonal tablet shapedα-Al2O3 crystal of up to 200μm length. Tabular alumina has extremely high refractoriness, high mechanical strength and abrasion resistance. Grain Size Test item Guarantee Value Typical Value Test Standards 8-5mm 5-3mm 3-1mm Porosity ％ ≤5.00 3.98 GB/T2999-2002 Bulk density g/cm3 ≥3.50 3.58 GB/T2999-2002 Water absorption ％ ≤1.50 1.02 GB/T21114-2007 Al2O3 ％ ≥99.00 99.20 GB/T21114-2007 Fe2O3 ％ ≤0.50 0.12 GB/T21114-2007 Na2O ％ ≤0.30 0.26 GB/T21114-2007 H2O ％ ≤1.00 0.41 - 3-1mm Particle size ％ 3-1mm≥90 96.80 - 5-3mm Particle size ％ 5-3mm≥90 96.50 - 8-5mm Particle size ％ 8-5mm≥90 94.00 -