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

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

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

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

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: Can anyone tell me what material the first rate fire resistant door is?: Material of Class A fire doors can be divided into steel and wood, so fire doors can be divided into fireproof steel door and fireproof wooden door. In fact, fire doors of all classes are divided into steel, wood, steel and wood, and other materials (see GB ). Mainly depending on what kind of material the customers want. The fire door is called class A fire door not because of the material but because of the fire-resistant time. The fire resistant time of class A fire door is not less than 1.2 hours and fire doors as long as meeting this condition can be called class A fire doors . The filling material in class A fire doors is generally perlite, whose difference is in thickness. A few of them will use fireproofing materials like foam core board, vermiculite fireproof board, MC composite material and so on. The thickness of class A fire door is usually 50mm. I hope my answer can help you.

Q: Does the production of refractory belong to advanced technology？: Refractories production is advanced technology supported by the state. The refractory enterprise is high-tech enterprises and it needs to apply for it in science and technology bureau.

Q: How long does it take for refractory cement to solidify?: 1. First you should be aware of the concepts of condensation and condesation time. Refractory cement belongs unshaped refractories, which when added water or liquid binding agent to mix, the agitation material will gradually lose thixotropy or plasticity and become in a state of solidification, thus is solidified. The time needed to finish the process is called solidification time. The whole process is divided into initial and final set. When beginning to lose plasticity called the initial setting, when called plasticity completely lost the final setting. 2. For refractory cement, the solidification time depends on the matching of the material and the parts and using methods. Under normal circumstances, in order to meet the requirements of time of construction, the initial set time should be no shorter than 40min, and the final set time should be no longer than 8H 3. There are also some exceptions. When refractory cement is used for spraying and injection operation together with other refractory castable, the set time is required as short as possible, sometimes flash set is required to prevent the occurrence of peeling or collapse of the spraying layer.

Q: what's the fireproof levels of fireproof and thermal inuslation matertial?: 1, organic materials: B level material is flammable, B1 level material is flame retardant. 2, inorganic materials: Grade A flame-resistant materials are divided into three classes and two kinds of materials.

Q: Who can tell me about the foundry refractory materials?: The casting fireproof materials can be divided into three categories in accordance with chemical property, namely, acidic, neutral and alkaline refractories. The commonly used refractories are alkaline and neutral ones, such as alkalic magnesia-carbon bricks, fired magnesite bricks, magnesia-chrome bricks, magnesium-calcium bricks, and neutral high alumina bricks, corundum brick, clay bricks, etc. The shapeless ones include: castable refractory, ramming?mass, gunning mix, coating, and dry vibration material, etc!

Q: What kind of material is refractory fiber?: Refractory fiber, also known as ceramic fiber, is a fibrous thermal insulation refractory. It has the characteristics of ordinary fibers, such as softness, flexibility, having a certain tensile strength. And it can be further processed into a variety of products such as paper, wire, rope, tape, blankets and felts. Besides, it has high temperature resistance and corrosion resistance which ordinary fibers don't have. As a fire retardant and thermal insulated material, it has been widely used in metallurgy, chemical, machinery, building materials, shipbuilding, aviation, aerospace and other industrial sectors.

Q: What are the commonly used fire protection materials: Firewall. The fire wall is made of non combustible material, and is directly installed on the base of the building or the reinforced concrete frame or fire proof walls . Fireproof limit of the firewall, according to the current "building regulations", is 4 hours, wheras the specification of Technical specification for concrete structures of tall building is 3 hours. doors resistant to fire, heat in a certain period of time These door usually prevent the spread of fire and gas in the fire resistant wall, staircase, pipe well. Fire door can be divided into steel fire doors, wood fire doors and composite materials fire door according to the material used. According to the limit of fire resistance can be divided into the class A fire door (1.2h), B fire doors (0.9), class C fire door (0.6h); (3) fire window. Windows resistant to fire, heat in a certain period of time It is usually installed in the fire resistance wall or doors; the fire shutter. This roller shutter can be refractory in a certain period of time. It is typically used for heat and fire insulation in escalator with difficulties to install fire resistant wall, fire resistant valve and smoke resistant valve. Fire resistant valve is installed in the ventilation and air conditioning system of air supply and return air duct, usually in the open state, fire, It will be turn off when the pipeline gas temperature reached 70 degrees, can meet the requirement for fire resistance and insulation for gas and fire. Smoke fire resistant damper installed in the exhaust system pipe, when the pipeline gas temperature reached 280 degrees, it will close automatically, insulating fire and gas.

Q: What are the new types of refractories? What are the characteristics? Their applications and developments?: AZS refractories are often used brick, corundum brick, magnesia chrome brick, silicon carbide, silicon nitride bonded silicon carbide, nitrides, silicides, sulfide, boride, carbide and other non oxide refractory materials; calcium oxide, chromium oxide, alumina, Magnesium Oxide, beryllium and other refractory materials.Often used insulation refractories are diatomite products, asbestos products, insulation panels and so on.Unshaped refractory materials commonly used are fettling, refractory ramming material, refractory castable, refractory plastic material, refractory clay, refractory gunning, refractory cast material, fireproof coating, lightweight castable, mud etc..

Q: How many types of fire-resistant material?: 1. Acid fire-resistant material refers to one with more than 93% SiO2. It is featured by resistance to the corrosion of acidic slag ad high temperature and easy to react with alkaline molten slag. 2. Alkaline refractory material generally refers to one with magnesium oxide or magnesium oxide and calcium oxide as the main component. It has high refractoriness and strong resistance to basic slag. 3. Silicate aluminum refractory material refers to one with SiO2, Al2O3 as the main component. According to the content of Al2O, it can be divided into three categories: half siliceous (15-30% Al2O3), clay (Al2O3 30 ~ 48%), high aluminum (more than 48% of Al2O3). 4. Fused cast refractory material refers to shaped refractory products made by high temperature melting and casting.

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