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Henan Hongtai Kiln Refractory Co., Ltd.
Henan Hongtai Kiln Refractory Co., Ltd.
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China Supplier Steel Furnace MgO Magnesia Refractory Brick/Magnesia Brick With Good Price

Henan Hongtai Kiln Refractory Co., Ltd.

China Supplier Steel Furnace MgO Magnesia Refractory Brick/Magnesia Brick With Good Price

Brand Name : HT

Model Number : hongtai

Certification : ISO9001

Place of Origin : Henan ,China

MOQ : 1 Ton/Tons

Price : US $450-600 / Tons

Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram

Supply Ability : 3000 Ton/Tons per Month

Delivery Time : 30 days

Packaging Details : plywood cases for export, or other packages required by customer.

MgO Content (%) : 91.5~97.5

Bulk Density(g/cm3) : 2.9~3.05

Apparent porosity/% : 15~18

Size : Customers' Requirement

Cold Crushing Strength(MPa) : 60~80

Sample : Freely

Refractoriness (Degree) : 1770°< Refractoriness< 2000°

SiO2 Content (%) : 0.6~4.5

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Product Description

Magnesia brick is an alkaline refractory material with a magnesia content of more than 90% and a periclsite as the main phase. Generally, it can be divided into two categories:sintered magnesia brick (also known as burnt magnesia brick) and chemically combined magnesia brick (also known as non-burned magnesia brick). Magnesia bricks with high purity and high firing temperature are called direct-bonded magnesia bricks because of the direct contact of the magnesite grains. The bricks made of fused magnesia are called electrofusion and recombined magnesia bricks.
Magnesia bricks have high refractoriness, good resistance to alkaline slag, high starting temperature of load softening, but poor thermal shock resistance. The sintered magnesia brick is made of brick and magnesia bricks. After being pulverized, compounded, kneaded and formed, it is fired at a high temperature of 1550 to 1600 ° C. The high-purity product has a firing temperature of 1750 ° C or higher. The non-casting magnesia brick is made by adding a suitable chemical binder to the magnesia, mixing, forming and drying.
Magnesia brick Mainly used in steelmaking alkaline open hearth furnace, electric furnace bottom and furnace wall, permanent lining of oxygen converter, non-ferrous metal smelting furnace, high temperature tunnel kiln, calcined magnesia brick and cement rotary kiln lining, heating furnace bottom and furnace wall, Glass kiln regenerator lattice bricks, etc.
Magnesia brick The sintered magnesia brick is made of brick and magnesia bricks. After being pulverized, compounded, kneaded and formed, it is fired at a high temperature of 1550 to 1600 ° C. The high-purity product has a firing temperature of 1750 ° C or higher. The non-casting magnesia brick is made by adding a suitable chemical binder to the magnesia, mixing, forming and drying.



Manufacturing process of five kinds of magnesia bricks such as magnesium aluminum brick

Manufacture magnesia silica brick
In order to make full use of the high-silica magnesia having a SiO2 content of 5 to 11%, a magnesia-silica brick can be produced by a production process for producing a magnesia brick. Unlike the calcined magnesia brick, since the forsterite (M2S) is not easily sintered, the calcination temperature of the magnesia silica brick should be appropriately increased.
The firing temperature of the magnesia silica brick is 1550 to 1570 °C.

Manufacturing magnesia-calcium brick
In order to make full use of high-calcium magnesite, magnesia-calcium bricks can be produced.
The production process of magnesia-calcium bricks is divided into two processes of clinker preparation and brick making. Preparation of magnesia-calcium sand clinker, the ratio of calcium to silicon (C/S) should be controlled between 2.2 and 3.0, Al2O3 should be less than 2%, and 0.3% apatite should be added as stabilizer to add 0.5~0.7% iron concentrate. Mineral powder as a mineralizer.
The high-calcium magnesite, apatite and iron concentrate are co-milled in a cylindrical mill. Particle size requirements: <0.088mm fine powder is greater than 90%. The powder is fired in a rotary kiln after being formed into a ball.
The high calcium magnesium brick is prepared by using high calcium magnesium sand as a raw material and bricks produced by firing the magnesium brick production process at 1600~1680 °C.

Manufacturing magnesium aluminum brick
Magnesium-aluminum bricks can be obtained by adding 5~10% Al2O3 to the sintered magnesia. A12O3 is added to the fine powder in the form of industrial alumina or high alumina bauxite.
If Al2O3 is introduced with high alumina ground, it is inevitable that impurities such as SiO2 are also introduced, thereby reducing the refractoriness and high temperature strength of the product. Therefore, the amount of bauxite should not be too large.
The process parameters for the manufacture of magnesium-aluminum bricks are similar to those of magnesia bricks. Only the firing temperature is generally 30 to 50 ° C higher than the firing temperature of the magnesia brick, reaching 1750 to 1800 ° C

Making periclase-magnesium aluminum spinel brick
The first-class brick magnesia and sintered magnesium-aluminum spinel sand with a C/S ratio of 0.4 are used as raw materials, and the critical particle size of the particles is 3 mm. The size of the magnesia is 3~1mm large particles, <1mm medium particles and <0.088mm fine powder are used as the tertiary ingredients. The sulfite pulp waste liquid is used as a binder, and is mixed with a wet mill to form a 300t friction brick machine. After the body is dried, it is fired at 1560 to 1590 °C. A weak oxidizing atmosphere should be controlled during the firing process.
The high temperature mechanical properties and thermal shock stability of periclase-spinel bricks are superior to ordinary magnesia-aluminum bricks. Its normal temperature compressive strength is 70~100MPa, thermal shock stability (1000 °C, water cooling) 14~19 times. The periclase-spinel brick can be applied to the high temperature zone of the active lime rotary kiln and the cement rotary kiln.
Manufacture of fired oil-impregnated magnesium dolomite brick
High-purity magnesia and magnesium dolomite sand with a MgO content of 95% or more are used as raw materials, which are crushed, crushed and used. The large particle and the medium particle material are heated to a certain temperature, and a certain amount of medium temperature asphalt (paraffin solution or random polypropylene) is added, and after stirring, fine powder is added, and after mixing, it is formed by a friction brick machine, and is formed at 1600~1650 °C. Burnt.
After the calcined bricks are preheated and vacuum-treated, they are impregnated in the asphalt at a high temperature, and then cooled to normal temperature.

Manufacture of synthetic magnesium chrome spinel bricks
Magnesium-chromium spinel bricks can be produced by using pre-reacted magnesia chrome sand and magnesia as raw materials and brine as a binder. The ingredients are as follows: pre-reacted magnesia chrome (particle size <0.066mm) 30%, magnesia (particle size <3mm) 55%, magnesia (particle size <0.088mm) 15%, plus brine 3%. The material is mixed by a wet mill, and the feeding sequence is: granular material→binding agent→fine powder, and the mixing time is not less than 10 minutes. Formed by a 260t friction brick press, the density of the green body is controlled at 3.05g/cm3, and the apparent porosity is not more than 16%. The green body was dried and fired at 1600 °C.
The physical properties of the product are as follows: apparent porosity of 15%, bulk density of 3.09g/cm3, normal temperature compressive strength of 86MPa, load softening temperature of more than 1700 ° C, thermal shock stability (1100 ° C, water cooling) 7 times.


physical and chemical indicators of Magnesia refractory Bricks


Application configuration of magnesia brick in glass furnace regenerator

Magnesia brick ,Generally, the uppermost layer of the regenerator lattice is made of high-grade magnesia bricks (w(MgO)>97%); the upper layer is made of medium-grade magnesia bricks (w(MgO) is about (95%~96%); the middle layer is directly combined with magnesia-chromium Brick; the lower layer uses low porosity clay bricks.
Magnesia brick .The important properties of the lattice are corrosion resistance and creep resistance. To improve creep resistance, it is necessary to use high-purity, low-iron, low-porosity and large-grain raw materials, and use high temperature for sufficient sintering. The stability and heat transfer effect of the tubular bricks are better than the strip type lattice bricks. For example, the specific heat exchange area of ​​the tubular brick is 16m-1, and the specific heat exchange area of ​​the strip brick masonry structure is only 10.4~12.7m-1.
Regenerator configuration when using alternative fuels
Magnesia brick .After the use of petroleum coke, the refractory material of the glass kiln regenerator is susceptible to erosion, of which 95 magnesia bricks are most seriously damaged.
On the other hand, oil is burning hard and burning slowly. After the petroleum coke is used, the unburned components enter the regenerator and continue to burn in the regenerator, increasing the temperature of the regenerator. Thus, under the action of high temperature and erosion, the lattice body softens and subsequently collapses. Based on the damage, the glass company expanded the amount of 97 magnesia bricks and direct combination magnesia chrome bricks in the regenerator, replacing the poorly performing 95 magnesia bricks. The life of the regenerator was extended from 1 year to 3 years, using petroleum coke. The trial achieved initial success.
Magnesia brick .In order to meet the demand for the use of alternative fuels, it is also necessary to develop high-purity magnesium-aluminum spinel materials which are resistant to corrosion and which are adapted to changes in the oxidation-reduction atmosphere. High-purity magnesium-aluminum spinel bricks have excellent creep resistance and alkali vapor resistance, and can also be used in oxy-fired glass melting furnaces.

Workshop corner


Produce Process

production process

1)Raw material to factory→checkout→burdening→stirring→mixing→taking out the raw material,
2)Crushing→Mixing→Shaping→Drying→Firing→Inspection→Packaging and Shipment.
2.Quality Assurance
1)Going out the furnace→checkout→packing→qualified product→putting in storage→sale,
2)The process from raw to product are strictly tested by equipment.
1.Inspection and Control of incoming raw materials: according to the chemical content,raw materials are classified into different levels to ensure quality of brick first.
2.Inspection and control of the process: during the production,every brick will be weighed twice strictly to reduce the error of weight .
3.Quality audit by quality management: inspection of product standardization of quality of each product by process control and experimentation, taking corrective measures timely whenever deviations are noted.
4.Before delivery, the inspectors will inspect the size,appearance, physical and chemical properties of brick again in factory.

refractory brick

Packaging & Shipping

Packaging of diatomaceous bricks

1.on wooden pallets with plastic cover: wooden pallet size :930*930 or 1000*1000mm,
2.Load weight of each pallet: 1.5-2.0 tons,
3.230*114*65mm:512PCS/Pallet, 230*114*75mm:448PCS/Pallet.

Shipping of diatomaceous bricks

1.Our packaging is as per customer’s request
2.Normal goods delivered by sea transport
3.Sample shipping by express
4.We will shipping and delivery goods timely, quanlity and quantity guaranteed, and also in accordance with the contract and customer's requirment completely.


Why choose Us

Henan hongtai kiln refractory co., LTD. Is well aware that there are thousands of demands from customers, which can be summarized in four aspects: reliable quality, timely delivery, reasonable price and considerate service.The company will continue to adhere to the corporate spirit of "contributing to society and serving customers" and the business philosophy of "mutual benefit, win-win, integrity, efficiency, preciseness and responsibility".Our company is willing to develop a wide range of technical exchanges with colleges and universities and colleagues from all walks of life at home and abroad in a flexible and diversified way.

Henan hongtai kiln refractory co., LTD. Main products are high alumina brick, clay brick, fused zirconium corundum brick, fireproof ball lightweight insulation brick, wear-resistant pouring material, corundum pouring material, low cement high strength pouring material, impermeable material, self-flowing material, plastic material, and various types of refractory materials.For different industries, the cement industry with anti-flaking high-alumina bricks, alkali resistant bricks, phosphate bricks;Boiler industry USES all kinds of brand wear-resisting brick, corundum brick, mullite brick and other finalizing materials.The company insists on "product quality is the life, enterprise integrity is the foundation", in the fierce market competition, won many users' trust and praise.The products are sold all over the country, as far as Vietnam, India, Korea, Pakistan, kazakhstan, Iran and other southeast Asian countries and regions.

Henan hongtai kiln refractory co., LTD. : "quality first, reputation first, customer first: it is our aim."Scientific management, strong technical force, perfect testing means, advanced technological equipment and stable product quality are the guarantee of quality service.Henan hongtai kiln refractories co., LTD sincerely hopes to cooperate with you hand in hand and in good faith.

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Cheap China Supplier Steel Furnace MgO Magnesia Refractory Brick/Magnesia Brick With Good Price for sale

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