Raw Materials for High Alumina Refractory Cement by CNBM
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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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Description of High Alumina Refractory Cement
Products | Calcium Aluminate Cement /High Alumina Cement CA-50 |
Applications | 1,As binders calcium aluminates cement are used in concretes and mortars for specialised applications for their properties of resistance to corrosion, abrasion and heat combined with rapid hardening and the ease of controlling grading variations. with new properties are then obtained. In this way, aluminates act as both a complex hydraulic binder and a mineral reagent interacting with the other components in the mix. 2,As reagents, calcium aluminates are found in non-hydraulic systems. This is the case in metallurgical treatments (iron and steel industry, foundry) where specific grades of calcium aluminate are used for their low-temperature melting properties and for trapping molten metal impurities. |
Features | 1,Very low mixing-water requirement |
2,Very high purity | |
3,High product consistency | |
4,High cold and sintered strength | |
5,Very tight specifications of setting times |
product | CA50F | A600 | A700 | A900 | CA50R | ||
Chemical Compositionn (%) | SiO2 | ≤8.0 | ≤7.8 | ≤7.5 | ≤5.5 | ≤7.0 | |
Al2O3 | ≥50.0 | ≥50.0 | ≥51.0 | ≥53.5 | ≥52.0 | ||
Fe2O3 | ≤2.5 | ≤2.5 | ≤2.5 | ≤2.5 | ≤2.5 | ||
R2O | ≤0.4 | ≤0.4 | ≤0.4 | ≤0.4 | ≤0.4 | ||
S | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ||
Cl | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ||
45µm residue (%) | ≤20 | ≤15 | ≤12 | ≤8 | ≤8 | ||
Blaine (m2/kg) | ≥300 | ≥300 | ≥320 | ≥350 | ≥350 | ||
InitialSetting (min) | ≥30 | ≥45 | ≥60 | ≥90 | ≥30 | ||
FinalSetting (h) | ≤6 | ≤6 | ≤6 | ≤6 | ≤6 | ||
Flexural strength (MPa) | 6h | —— | —— | —— | —— | ≥3.0 | |
1d | ≥5.5 | ≥6.0 | ≥6.5 | ≥8.0 | ≥7.0 | ||
3d | ≥6.5 | ≥7.0 | ≥7.5 | ≥10.0 | ≥8.0 | ||
Compressive strength (MPa) | 6h | —— | —— | —— | —— | ≥30 | |
1d | ≥40 | ≥45 | ≥55 | ≥72 | ≥60 | ||
3d | ≥50 | ≥55 | ≥65 | ≥82 | ≥70 | ||
- 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: The mechanism and function of antioxidants in carbon containing composite refractories are briefly described.
- Mechanism analysis of silicon actionWhen silica fume is added to the carbon composite refractory, the phase changes and chemical changes are as follows:<1> Si (s) +C (s) =SiC (s) Delta G ~ =-522+1.50T (kJ)<2> Si (s) +MgO (s) =Si (g) +Mg (g) Delta G ~ =203.9-0.13T (kJ)<3> 2Si (s) +CO (g) =SiC (s) +SiO (g) Delta G ~ =-963.2+0.31T (kJ)<4> SiC (s) +CO (g) =SiO (g) +2C (s) Delta G ~ =81.47-0.15T (kJ)<5> SiO (g) +CO (g) =SiO2 (s) +C (s) Delta G ~ =-668.8+0.33T (kJ)From the above diagram and the reactions seen at high temperatures has joined the Si SiO and Mg volatiles, but <4> and <5> reaction have played a role in inhibiting carbon oxidation, and the condensation of SiO2 to a certain extent the role of protective film.The total reaction process is CO reduction to C, and there is a certain volume expansion, so that the pores are blocked and the density of bricks is increased. Therefore, the oxidation resistance of brick is improved.
- Q: Who knows what is the external wall thermal insulation materials for level A fireproofing?
- In general, external wall thermal insulation materials can be divided into level A and level B by combustion grading. Level A is non-combustible material, and level B is combustible materials. A few years ago, the fire of the CCTV Building and Shenyang Hotel put the blame on the level B material. At present, the level A material is widely used, and the prices of same level A materials may be even cheaper than the level B material. Level A material is generally divided into thermal?mortar, phenolic foam board, rock wool board and foam cement board. I hope this information can be helpful to you. Hope you adopt.
- Q: What kinds of refractory will be used in kiln of sintering ceramics?
- Porcelain has many classes, including acid, alkaline and neutral materials.
- Q: How long is the duration of fire resistance that fireproof window of level B can endure?
- The duration of fire resistance: fireproof window of level A shall not be less than 1.5h, while level B shall not be less than 1.0h. The frame of both fire proof windows A and B are made of steel, and the glass, not less than 26mm, is composite insulation fireproof glass. Monolithic fireproof glass window is neither B fire proof window nor A fire proof window, but non insulated fire proof window.
- Q: What's the classification of flameproof glass, the refractory time of fireproofing glass.
- who knows the classification of fireproofing glasses, how long is the fire-resistant time?
- Q: What is the difference between the fire?rating and the fire resistant level of the fire-fighting equipment?
- Fire rating and fire-fighting rating are the misnomer to the building fire resistant level. The building fire risk is measured by fire resistant level. The article 3.2.1 and 5.1.7 of "Architectural design code for fire protection" have made provision respectively on the fire resistant level of plant (the storeroom) and civil construction. Article 3.0.2 of "Code for fire protection design of tall buildings" has made provisions on the fire resistant level of tall buildings. Fire resistance rating of the building is divided into four levels. Standard of fire resistance rating is determined by the combustion performance and fire resistance of the main housing member. Level one or two are in accordance with the Article 1.0.2 in this specification.
- Q: How many kilns using refractories are needed? What are the furnaces respectively?
- Kiln and five hundred-degree centigrade thermal equipment need to use refractories, glass furnaces, electric arc furnaces, mixer, cement rotary kiln, open hearth furnace and limestone kiln; in fact, when the temperature is more than four, the mesh belt furnace, blast furnace, cupola oven, stove, pushing plate kiln, furnace, heat treatment furnace, roller kiln, down draft kiln, ladle, coke, shuttle kiln,etc.
- Q: What are the best refractory materials in 2,400 Celsius degree?
- It is the purpose that decides what kind of materials you should use. What you have said is 2,400 Celsius degree, right? It is about the fire resistance of the material or the required temperature of it?
- Q: how long is the fire endurance of plasterboard?
- Plasterboard is non-flammable B1 level products. There are introductions in Fireproof Specification of National Standard Building Interior Decoration Design. Plaster board mounted on steel stud can be used as A level decoration materials. In accordance with the national fire safety rules on fire durance of walls and ceilings and other components, we can not simply say whether a piece of gypsum board can meet the requirements. In GB "gypsum board" it clearly states: Fireproof plasterboard can endure fire longer than 20minutes. Wherein Dragon brand fire-resistant gypsum board can endure fire longer than 40 mintues. Gypsum board is comprised of dry wall, steel stud and various auxiliary materials. the fireproof performance of the gypsum board system is relevant to the type, quality , layers of the gypsum board, quality of keel and installations, whether the rock wool is filled and its unit weight, the treatment of seaming and some minor joints.
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Raw Materials for High Alumina Refractory Cement by CNBM
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 2000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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