$Raw Materials for Refractory:High Alumina Low Cement Castable Ladle Tundish Refractory Cement System 1$
$Raw Materials for Refractory:High Alumina Low Cement Castable Ladle Tundish Refractory Cement System 2$

$Raw Materials for Refractory:High Alumina Low Cement Castable Ladle Tundish Refractory Cement$

$Raw Materials for Refractory:High Alumina Low Cement Castable Ladle Tundish Refractory Cement System 1$

$Raw Materials for Refractory:High Alumina Low Cement Castable Ladle Tundish Refractory Cement System 2$

Raw Materials for Refractory:High Alumina Low Cement Castable Ladle Tundish Refractory Cement

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 2000 m.t./month

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Category

Calcium aluminate cement is sorted into two kinds by chemical composition: common calcium aluminate cement (Al2O353%~72%,CaO21%~35%) and pure calcium aluminate cement(Al2O372%~82%,CaO19%~23%). And common calcium aluminate cement is divided into low iron type(Fe2O3<2.0%) and high iron type(Fe2O37%~16%). The low iron type calcium aluminate cement which has a Al2O3 content of 53%~56% and CaO of 33%~35% is called bauxite cement; the one which has a Al2O3 content of 59%~61% and CaO of 27%~31% is called Aluminium-60 cement; the one which has a Al2O3 content of 65%~70% and CaO of 21%~24% is called low calcium aluminate cement, another kind is fast hardening super early strength calcium aluminate cement. And pure calcium aluminate cement is divided into conventional type (Al2O3 content is 72%~78%)and super high alumina type(Al2O3 content is 78%~85%).

Specifications:

Specification of three grads of CA50
Mark		A600	A700	A900
Composition (%)	SiO2	≤7.8	≤7.5	≤5.5
	Al2O3	≥50.0	≥51.0	≥53.5
	Fe2O3	≤2.5	≤2.5	≤2.5
	Fe2O3	≤0.4	≤0.4	≤0.4
SSB (m2/kg)		≥300	≥320	≥350
Initial Setting Time(min)		≥45	≥60	≥90
Final Setting Time (h)		≤6	≤6	≤6
Breaking Strength(MPa)	1d	≥6.0	≥6.5	≥8.0
Breaking Strength(MPa)	3d	≥7.0	≥7.5	≥10.0
Compressive Strength(MPa)	1d	≥45	≥55	≥72
Compressive Strength(MPa)	3d	≥55	≥65	≥82

Item Briand		CA70	CA80
Chemical Composition %	SiO2	≤1.0	≤0.5
	AL2O3	≥68.0	≥77.0
	Fe2O3	≤0.7	≤0.5
	R2O	≤0.4	≤0.4
	S	≤0.1	≤0.1
	Cl	≤0.1	≤0.1
325M Residue on Sieve (%)		≤5	≤5
Surface Area (m2/kg)		≥400	≥450
Initial Setting Time (min)		≥45	≥45
Final Setting Time (h)		≤6	≤6
Breaking Strength (MPa)	6h	--	--
	1d	≥5.5	≥5.0
	3d	≥6.5	≥6.0
Compressive Strength (MPa)	6h	--	--
	1d	≥40	≥30
	3d	≥50	≥40

Application

Calcium aluminate cement is mainly used as binder of refractory castable and gunning mix. Common calcium aluminate cement is applicable to low-grage and medium-grade refractory castable, such as firecaly castable and high alumina castable etc; Pure calcium aluminate cement is applicable to high-grade refractory castable, such as corundom castable, mullite castable, chrome containing corundum castable and spinel castable etc; The calcium aluminate cement addition quantity of common refractory castable is 10%~20%, low cement castable is 5%~10%, super low cement castable is less than 5%. Addictives which can improve workability may be added to castables bond by calcium aluminate cement so as to meet the requirements of construction, such as setting accelerator, setting retarder, water reducer (dispersant), plasticizer etc.

$Ladle tundish castable High alumina Low cement refractory cement$

Q: What is the role of adding chromium oxide green in unshaped refractory materials: Generally, less is added in corundum or corundum spinel refractory material, but it can significantly improve the material performance such as high temperature strength, erosion resistance, thermal and shock stability, etc.

Q: What are the requirements of refractory temperature of refractory brick?: Refractoriness can reach 1690 degree, but the highest operating temperature is 1350 degree. If the temperature goes higher, operation life will be greatly shortened.

Q: I want to consult the fire resistant level standards of external wall thermal insulation materials.: Fire resistant level standards of external wall thermal insulation materials: 1, The thermal insulation material that has A-class combustion performance: Spraying inorganic fiber, glass wool, foam glass, ceramic foam, rock wool, foam cement and perlite obturator, and so on. 2, The thermal insulation material that has B1 level combustion performance: Special processed extruded polystyrene board (XPS) / special processed polyurethane (PU), phenolic and polystyrene powder. 3, Thermal insulation materials that have level B2 combustion performance: Molded polystyrene board (EPS), extruded polystyrene board (XPS), polyurethane (PU), polyethylene (PE), etc.

Q: which kind of refractory is used in golden smelting furnace? How about his using temperature: generally the price of the quartz sand refractory material is higher and the temperature can meet the requirement of 2000 degree.

Q: What's the fire endurance of hollow brick?: This question is really very simple. It is better no to exceed 1050℃, or it will be easily burnt. I think 980 ℃ is ok in reality. It depends on how thick your wall is because fire endurance of hollow brick is related to wall thickness. 24 wall can generally endure for 3 hours or more.

Q: What are the filling refractories in door leaf of class A fire resistant door?: Magnesium chloride, magnesium oxide, perlite and other mixtures.

Q: What high-molecular polymers can be used as fire-resistant material binder?: Lignin is the least expensive.

Q: What is the interior fireproof thermal insulation material?: polystyrene foam board, glass fiber spraying, polyurethane foam, thermal insulation system of inorganic wall. Use "DY" inorganic active thermal insulation material, have small thermal conductivity, large heat storage coefficient, better strength and achieve better thermal insulation and energy-saving effect when used in wall . Wall should definitely not crack and hollow because of high temperature in summer. It doesn't crack and shed because it is influenced by stress during heat expansion and cold contraction in cold winter.

Q: The principle of choosing fire-resistant material in Thermal Energy and Power Engineering equipment.: Different thermal technology equipment has different operation condition and select different refractory material. We should take economical and practical as principle.

Q: What kinds of fireproof materials does the safe use?: The fireproof materials of safe, copper is one of the most widely used material of locks for its good mechanical performance, corrosion resistance and processibility and beautiful colors.

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