Synthetic Magnesite Refractory Products

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High iron synthetic magnesite, high iron & high CaO magnesite,magnesite alumina spinel, magnesite chrome spinel. All the kinds of synthetic magnesite and spinel are made from high quality magnesite ore and dolomite ore, by requiting and sintering them at high temperatures together with iron powder, chrome powder, and bauxite as an additive.

Index	Chemical Compostion /%					Physical Index
Brand	MgO	Al₂O₃	S_iO₂	CaO	Fe₂O₃	BD/g/cm³
MTS-68Aa	68-80		≤2.5	≤9.0	≥10.0
MTS-68Ab	68-80		≤3.0		≥10.0
MTS-68Ac	68-80		≤5.0		≥10.0
MFC-83A	≥83		≤1.0	7-8	6-8
MFC-83B	≥83		≤1.2	7-9	6-8
MFC-83C	≥83		≤1.5	7-9	6-8
MAS	28-29	64-65	5-8	1.2		3.20
MCa-32	63-65		≤1.0	31-33	≤3.0	3.30
MCa-25	72-74		≤1.0	23-25	≤1.0	3.30

Synthetic Magnesite is a kind of industry raw materials with properties of moderate basicity and chemical activity, widely used in the fields of national defense, medical, chemical, paper-making, shipbuilding and environment protection etc.

l Its primary technology application contain the areas as following: cellulose acetate, drilling mud, fire retardance filling, flue gas desulfurization, leather-making, oil refining additive, medical industry, rubber and plastics industry, sugar industry and wastewater treatment etc.

Q:whether the fire resistant level of aerated concrete building blocks can reach the grade one?: it has fire resistant level, incombustible?material,and it should reach grade one level.

Q:What do we mean by saying that a ladle cover knots, elbow knots, blowpipe knots in refractory materials? What is the “knot”?: A less accurate view of the statement is probably the meaning of the “construction of refractory material" , for example, pouring castable can be called “knot”, the pounding of the construction can also be said that, so it is with spraying paint.

Q:Which refractory quality inspection authority is good?: Of course, it is Research Institue of Refractory Materials in Luoyang, Henan. In fact, what we want is accuracy and authority. Quality and inspection costs, which is more important?

Q:The classification of fire-resistant material: Refractory material cna be divided into common and special fire proofing material. Common fire proofing material can be sub-divided in to acid fire proofing material, neutral fire proofing material. and alkaline fire proofing material according to chemical properties. Special fire proofing material can be divided into high temperature oxide refractory, refractory compounds and high temperature composite materials according to the composition. In addition, it also can be divided into common refractory products (1580 ~ 1770 ℃), high-grade refractory products (1770 ~ 1770 ℃) and super refractory products (above 2000 ℃) according to the strength . According to the shape, it can be divided into block (standard brick, special-shaped brick, etc.), special shape (crucible, sagger, pipe, etc.), fibrous (aluminum silicate, zirconia and boron carbide, etc.) and irregular shape (refractory clay, refractory castable, ramming material and so on). According to sintering process, it can be divided into sintered product, fused cast product and melting jetting product.

Q:how is the high-temperature flame-retardant fibre board?: The market is mainly divided into three kind of fiber. Density fiberboard, medium density fiberboard, high density fiberboard. Density fiberboard: It is rolled timber sheet made of wood shaving material produced by timber or non timber fiber that is added with or without glue or auxiliary material. A density of less than 450 kg / cubic meter, the larger fiber particles, the internal structure is not homogeneous, relatively lack of strength, lighter weight. MDF: use wood fiber or other plant fiber as material, added with glue. A sheet pressed at high temperature and pressure. A density between 450-880 kg / cubic meter, fiber particles is moderate, well proportioned internal structure, greater strength, moderate weight. HDF: Use wood fiber or other plant fiber as material, added with glue. A sheet pressed at high temperature and pressure. Its density is about 880 kg / cubic meter, small fiber particles, well proportioned internal structure, greater strength, greater weight. there are also artificial boards such as chipboard and melamine board in the market, generally used for making furnitures. the thickness of fiberboard that is produced and controlled more flexibly, is generally 5 per cent (general bulk price of 30 yuan per square meter), 9 cm (50 yuan), 18 cm (100), 25 cm (120), etc. There are thicker. However, proper deviation is acceptable. The board is usually thicker or thinner than the specified thickness. For example, It is only 16mm when specified 18mm.

Q:What substitutes are available for high-end refractories in addition to zircon sand?: The composite sand powder can effectively replace zircon sand, with the same operation process, less operation time and environmental protection

Q:What is the mechanism of the errosion of the iron to the refractories?: For example, the effect of the iron oxide: Mo corundum given temperature Fe2O3 solid solubility limit of the solid solution formed of corundum stone high solubility than the solid solution Mo Mo corundum lattice shape so Fe2O3Al2O3-SiO2-based material starts melting temperature of the system or the content of Al2O3 and Al2O3 / SiO2 ratio off Al2O3 / SiO2 & lt; 2.55 starting melting temperature of 1380 ℃ when Al2O3 / SiO2 & gt; 2.55 start melting temperature is increased 1460 ℃ and with its Al2O3 content increased gradually to increase the original atmosphere Fe2O3 original FeO off the solvent into the glass phase and the system starts melting temperature drops do not fall to 1240 ℃ 1380 ℃. Lower the melting point, increase the erosion, and reduce the life span.

Q:What are the specifications of refractory kilns ?: Rotating equipment is widely used in mechanical, physical or chemical treatment of solid materials in building materials, metallurgy, chemical and environmental protection industry. Such equipment is called rotary kiln. The best materials are magnesia-chrome bricks, unfired magnesite-chrome bricks, silmo bricks, magnesia-alumina spinel bricks, magnesia calcium zirconate bricks, iron magnesia bricks and castables.

Q:Graphite and other carbon materials may be oxidized to CO or CO2 at high temperatures. But why can they be refractories?: There is no contradiction for this. Any substance can be combustible, but different materials have different ignition points.There are many types of graphite. Pyrolytic graphite has a much lower ignition point. Therefore, as long as it reaches at a certain temperature, it can convert into graphite. Mostly, in practical applications (such as brake pads will add a certain amount of graphite), graphite is required to have refractoriness of below 1000 ℃. Graphite can serves as both the combustible and refractory material. So, it can be used as a fire-resistant and high-temperature-resisrant material because graphite (lamellar graphite) has a ignition point of at least 3000 degrees in an oxygen free condition. The above information is for reference only and is offered by Xin Ruida Graphite Company.

Q:Does anyone know the characteristics of refractory for glass kiln?: Refractory is a kind of non-metallic material with refractoriness not less than 1580 ℃, which has better thermal shock resistance and chemical erosion resistance, low heat conductivity coefficient and low expansion coefficient. Refractoriness is the centigrade?temperature of refractory cone specimen wiyhout any load resisting high temperatures without melting down Refractory is widely used in industries like metallurgy, chemical, petroleum, machinery manufacturing, silicates, power, etc., which is mostly used in the metallurgical industry, accounting for 50% to 60% of total output.

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