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SIC silicon carbide high temperature refractory brick with lower price

Categories silica bricks
Brand Name: HT
Model Number: hongtai
Certification: ISO BV SGS
Place of Origin: Henan, China
MOQ: 10 Ton/Tons
Price: US $200-500 / Tons
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 3000 Ton/Tons per Month
Delivery Time: 25 days
Packaging Details: plywood cases for export, or other packages required by customer.
SiC Content (%): 80-90%
0.2MPa RUL starting temperature °C min: 1600
Refractoriness: Common (1580°< Refractoriness<1770°)
Application: furnace lining
Typical Apparent Porosity %: ≤18
B.D: ≥2.5g/cm3
Cold Crushing Strength MPa: ≥85
Color: black
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    SIC silicon carbide high temperature refractory brick with lower price

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    Product Description

    A refractory made of SiC as the main raw material. Contains SiC 72% to 99%. It is divided into silicon carbide bricks such as clay bonding, Si3N4 bonding, Sialon bonding, β-SiC bonding, Si2ON2 bonding and recrystallization. The silicon carbide brick has high thermal conductivity and good wear resistance, thermal shock resistance and corrosion resistance.

    SiC bricks ? Instructions for use
    It can be used for lining of aluminum electrolytic cell, kiln for melting aluminum pipe and ceramic kiln, lower part of large and medium sized blast furnace body, furnace waist and belly, aluminum refining furnace lining, zinc distillation tank lining, etc.


    Silicon carbide bricks ? Production process
    The formulation of coarse, medium and fine SiC should be 5:1:4. The raw material for the manufacture of SiC bricks is generally black SiC, and its chemical composition is as follows: SiC 98.0%, free C O. 5%, Fe 0.2%, free SiO2 0.6%. Due to the different bonding methods, the process is different. The brief process of different bonding methods is (1) silicon nitride bonded silicon carbide brick: a blank formed by using coarse, medium and fine silicon carbide particles and fine silicon powder, and in pure N2 gas, a kind is produced at 1370 ° C. 26alpha;-SiC is the backbone and is in %26alpha; and %26beta;-Si3N4. The silicon nitride of the matrix is bonded to the silicon carbide brick. There is still a small amount of residual silicon and SiO2N2 in the matrix, and the relative amounts of these components vary from manufacturing plant to manufacturing plant. (2) Combining silicon carbide bricks: SiC, silicon powder and carbon powder are mixed and formed according to a certain ratio, and fired in a reducing atmosphere at 1400 °C. In most cases, carbon burning is used. During the firing process, a %26beta;-Si3N4 bonded SiC brick with %26alpha;-SiC as the framework and fine grain %26beta;-SiC as the matrix was produced. %26beta;-SiC is formed by the reaction of fine silicon powder with fine carbon powder during the firing process. This product also contains a small amount of residual silicon and carbon. (3) Silicon oxynitride combined with silicon carbide brick: When this brick is compounded, the proportion of fine silicon powder is less than si. N. Combine the ratio of silicon carbide bricks. After molding, it is fired in a N2-rich atmosphere (requiring a certain partial pressure of O2), and the firing temperature is 1350 to 1400 °C. The finished product is a framework of %26alpha;-SiC, which is a matrix of Si2ON2 combined with SiC bricks, and a small amount of Si and Si3N4 are present in the matrix. (4) Sialon combined with silicon carbide brick: Si3N4 and Al2O3 fine powder are blended in SiC with a certain particle size ratio. After mixing, adding a binder, kneading, molding, and firing in a reducing atmosphere

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    Technology

    Silicon carbide physical and chemical indicators

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    Classification and performance of silicon carbide bricks
    The specific production process and performance of SiC bricks are as follows:
    1. Silica-bonded silicon carbide brick
    All products which are mainly composed of silicon carbide particles and fine powder and partially composed of silica and quartz fine powder are silica-bonded silicon carbide products.
    For example, 90% different particle size silicon carbide and 5% -10% silica powder and calcium oxide mixture powder (less than 0.088mm), the mixing ratio is 8:2 or 9:1. Adding an appropriate amount of organic binder (pulp waste liquid, dextrin, methyl cellulose) to the mud, press molding with a brick press, drying, and firing at 1300 ~ 1400 °C.
    Second, clay combined with silicon carbide brick
    Clay-bonded silicon carbide products are refractory products made of silicon carbide as the main raw material and clay as the binder. The product has high thermal conductivity, good thermal shock resistance and wear resistance. Used as aluminum refining furnace lining brick, zinc distillation furnace distillation tank and cement kiln cooler.
    Third, high alumina combined silicon carbide brick
    (1) Production process. A mullite-bonded silicon carbide brick was produced using silicon carbide (SiC 98.32%) and Chenxi mullite raw material. The particle size of the silicon carbide sand is 8~5mm, 5~3mm and 3~1mm. A fine powder is prepared from silicon carbide powder and mullite powder, and the fine powder has a particle size of less than 0.044 mm. After the ingredients were mixed in the kneading machine and trapped for 24 hours, they were formed on a vibration press molding machine. The green body was naturally dried for 15 days, dried at 30 to 35 ° C for 15 days, and baked in a kiln at 200 to 350 ° C for 6 days. The product is fired in an inverted kiln. The highest firing temperature is 1500 ° C, the heat preservation is 6 days, and the total firing time is 10 days.
    (2) Physical and chemical properties. Physical and chemical properties of mullite combined with silicon carbide brick: SiO2 82%, mullite 15%, apparent porosity 17%~19%, bulk density 2.54g/cm3, load softening temperature greater than 1700°C, compressive strength greater than 110MPa , thermal shock resistance (1100 ° C ~ water cooling) greater than 20 times. This silicon carbide brick can be used for the tap hole of the ferroalloy electric furnace and the ring brick of the blast furnace tuyere.
    Fourth, nitride bonded silicon carbide brick
    1. Silicon nitride combined with silicon carbide brick
    (1) Raw materials. Adding silicon carbide coarse sand 30%~40%, silicon carbide fine powder 30%~40%, and metal silicon powder 20%~30%.
    (2) Ingredients. Mix in the wet mill, first add silicon carbide powder and metal silicon powder for 5~8min, add coarse sand and then mix for 1~20min, add pulp waste liquid or molasses bond, wet mix for 15~20min, control moisture in 4% ± 0.2%.
    (3) Forming. It is formed by a brick press, and the molding pressure is 50 MPa or molded by an isostatic press or a pressurized vibration molding machine. The control brick has a bad density of 2.5g/cm3, which is beneficial to the nitriding treatment.
    (4) Dry. The moisture of the slab after drying is less than 0.5%, and is nitrided and fired in an electric furnace through a nitrogen gas. The firing temperature is 1300~1350 ° C, and the temperature is kept for 5 to 10 hours.
    Five, self-bonding silicon carbide brick
    Self-bonding (reactive bonding) silicon carbide bricks are products in which silicon carbide is used as a bonding phase. In the production, silicon carbide particles are used as the aggregate, silicon carbide powder, metal silicon powder and carbon powder are used as the matrix, and tar pitch is used as the bonding agent. After hot mixing, it is formed on a hot press and fired under protective conditions.

    Workshop corner

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    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.

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    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.

    packaging

    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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    Contact

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