Raw Materials for Refractory:Direct-Binded Magnesia-Chrome Bricks
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Made from highgrade magnesite sinter and chrome oxide by high pressure shaping and temperature firing. It is characterized as having high direct-bonding rate and large crystals, good thermal spalling resistance and slag resistance.
Brand | Standard Value | ||||||
Index | MZ-87 | MZ-89 | MZ-91 | MZ-95 | MZ-96 | MZ-97 | MZ-98 |
MgO≥ /% | 87 | 89 | 91 | 94.5 | 95.5 | 96.5 | 97.5 |
CaO≤ /% | 3 | 3 | 3 | 2 | 2 | 2 | 2 |
Cold Crushing Stength≥ /MPa | 39.2 | 49 | 58.8 | 39.2 | 39.30 | 39.2 | 44.1 |
Apparent Porosity≤ /% | 20 | 20 | 18 | 20 | 20 | 18 | 18 |
Refractoriness under Load≥/ ℃ | 1520 | 1540 | 1550 | 1650 | 1650 | 1680 | 1700 |
This product belongs to new chromefree basic refractories for large rotary kilns developed by our company. It is produced with high quality synthetic spinel materials and special technical process. The product is characterized by high crushing strength, good thermal shock resistance, good thermal creep, high refractoriness under load, also has the characteristics of direct bonded magnesia-chrome brick (easily adhering the furnace crust), and has solved the problem of environment pollution of sexavalent chrome forming during the use magnesia-chrome brick in cement kiln.
The development and application of pleonaste brick conform to the trend of magnesitechrome brick withdrawing from the historical stage in the cement industry, meet the demand of chrome-free basic refractories in cement industry under the new environmental-friendly situation.
Application:
It is widely used in all kinds of rotary kiln, the sleeve kiln, shaft kiln and lime kiln, etc
- Q:Does anyone know the refractory temperature of fire-resistant glass?
- Ordinary glass will burst under sharp temperature difference of about 70-120 degrees and toughened glass of 200 degrees. It is not yet clear for the bursting temperature differences of the refractory glass. If the overall glass is heated evenly, it will have no significant change below 600 degrees, and it will deform with the increase of temperature until melting. The fire-resistant time of the glass you said is the time to heat the glass into the extreme temperature differences it can endure, which should not be more than 10 minutes
- Q:What material is used to make furnace pipe of refractory bricks?
- Furnace pipe of refractory brick is an indispensable part of casting cupola. Furnace pipe is divided into upper and lower part. Radial direction and axial breathing. The upper furnace pipe adopts double layer steel structure and countercurrent air supply mode. The lower furnace pipe is made by processing integrated heat resistant steel in flange, fin and inner wall in wearing parts. The operation life is over 3000h. There is radiating rib of heating air on the edge of furnace pipe liner by using the heat of casting cupola to heat air in cupola. Hot air temperature is about 180-250℃, which contributes to improve trhe thermal efficiency of production equipment, decrease production cost and improve economic benefit of enterprises.
- Q:How long can gypsum board endure fire?
- General gypsum plaster board with a thickness of less than 12mm has a fire endurance which is less than half an hour. Scheme One of gypsum board partition system by using 75# series of lightgage steel joist: separation distance of keels keep 600mm in vertical direction. The thickness is greater than 0.5mm; gypsum board: it shoule be the board of double-sided and single-layer with the thickness of 12mm. Fire-resistant gypsum plaster board's fire-resistance limit: 1 hour. Sound insulation index: over 35 rwdb.
- Q:What's the fire?retardant material of roller shutter fire resistance door ?
- Core board of fire door materials are composited by inorganic materials, and the main components are perlite, inorganic adhesive and other special formula. It has flat and smooth surface, unibody. It is fireproof, sound and thermal insulating. It has passed tests of Tianjin Fire Research Institute and Beijing construction institute.
- Q:What are the additives and recipes of refractory?
- Trimeric major role played bulk water reduction effect can be considered strong trimer strong bleeding effect'm sure Hey lignin sulfonate water-reducing effect of the strong retarding superplasticizer effect in two critical recommendations with more money to buy homes are equipped who is willing to disclose ah experiments to solve the problem through Chuk Wan
- Q:Can anyone tell me what is A-leve fireproof material?
- Combustion performance of materials can be divided into: A-level, B1-level, B2-level and B3-level, which respectively refer to noncombustible, difficult-flammble, flammable and inflammable materials. Building materials can be divided into four grades based on combustion performance (noninflammability, flame retardancy, flammability and inflammability). According to the stipulation of "Specification of Fireproof Design for Buildings" (GBJ16-1987) (2001 revised edition), fire hazard of production or storage should be divided into A-level, B-level, C-level, D-level and E-level. In "Specifications on Fireproof Design for Petrochemical Enterprises" (GB50160--1992) (1999 Revision), it also stipulates that fire hazard should be classified on the same basis of subtsance danger in usage, production or storage. According to different fire hazard, requirements and measures of oreventing and restricting fire explosion can be put forward from the aspects of fire?separation distance, fire resistant rating of buildings, allowed floors, safe evacuation, fire fighting facilities and other aspects.
- Q:What are the advantages and disadvantages of new external wall fireproof and thermal inuslation matertials?
- The new external wall fireproof and thermal inuslation matertials have both the advantages and disadvantages. Advantages: 1)Low requirements on the waterproof, weather resistance and other technical indicators. The dry wall and gypsum plastering mortar, etc. can meet the requirements and can be easily obtained; 2) The inner insulation material are separated by the floor, and construct within a height of only a storey , without erecting scaffold ; 3) In the hot summer and cold winter or hot summer and warm winter area, the inner insulation meets the requirements; 4) The glass beads overcome the shortcomings of expanded perlite, like, large amount water absorption, easy powdering, big volumetric shrinkage in the slurry mixing process, easily leading to post-insulation product performance degradation and hollowing, cracking, and also make up for the defects of polystyrene particles organic materials, like, flammable, poor fire performance, producing harmful gas at high temperatures and anti-aging, poor weather resistance, poor workability and large rebound in construction, ect. Disadvantages of external wall insulation : 1) Since the ring beam, slab and column structure would cause thermal bridges, leading a greater heat loss; 2) It is of low intensity, high water absorption, easy to shrink and crack. The insulation system is prone to cracking, leaking or loss and other common quality problems, especially it is easy to crack at the seams, thus being difficult to exsit as long as the building. 3) It is inconvenient for the users to redecorate and hang ornaments; 4) It takes up indoor used space;
- Q:how to classify the fireproofing material levels A1 A2 B1?
- their classification is shown specifically in Fireproof? Specification of Building Interior Decoration?Design GB 50222-95 appendix A, flammability,inflammability materials, flame retardency, noninflammability: combustion performance of A, B3, B2, B1 materials are divided into
- Q:Which industry does refractory belong to?
- It belongs to inorganic refractory: Ceramic refractory bricks (used in steel-making furnaces) There is also organic polymer in heavy industry: Halogen-containing and halogen-free It belongs to construction industry.
- Q:What is refractory cement?
- The introduction of properties and chemical composition of refractory cement. Refractory cement usually refers to the cement with calcium?aluminate as the mian compopnent. Refractory cement is a monolithic refractory. It is in particular a basic binder of castable refractory. Its chemical composition is mainly Al2O3 and CaO, and some contain a considerable number of Fe2O3 and SiO2.
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Raw Materials for Refractory:Direct-Binded Magnesia-Chrome Bricks
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
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