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Ceramic composite wear-resistant pipeline

Wear resistant ceramic composite pipe, also known as ceramic lined composite steel pipe, is a type of ceramic composite steel pipe manufactured using a high-tech production process - self igniting high-temperature clutch synthesis method. There are fundamental differences between wear-resistant ceramic composite pipes and traditional steel pipes, wear-resistant alloy cast steel pipes, cast stone pipes, as well as steel plastic and steel rubber pipes.

  • 产品描述

  • Wear resistant ceramic composite pipe, also known as ceramic lined composite steel pipe, is a type of ceramic composite steel pipe manufactured using a high-tech production process - self igniting high-temperature clutch synthesis method. There are fundamental differences between wear-resistant ceramic composite pipes and traditional steel pipes, wear-resistant alloy cast steel pipes, cast stone pipes, as well as steel plastic and steel rubber pipes.

    Wear resistant ceramic composite pipe, also known as ceramic lined composite steel pipe, is a type of ceramic composite steel pipe manufactured using a high-tech production process - self igniting high-temperature clutch synthesis method. There are fundamental differences between wear-resistant ceramic composite pipes and traditional steel pipes, wear-resistant alloy cast steel pipes, cast stone pipes, as well as steel plastic and steel rubber pipes. The outer layer of ceramic steel pipe is steel pipe, and the inner layer is corundum. The Vickers hardness of the corundum layer is as high as 100-1500 (Rockwell hardness is 90-98), equivalent to tungsten cobalt hard gold. The wear resistance is more than 20 times higher than that of carbon steel pipes, and it has much better performance than the usually bonded corundum grinding wheel. Nowadays, corundum grinding wheel is still the main grinding wheel for various types of grinding machines to cut quenched steel. The corundum layer in ceramic steel pipes can wear off the corundum grinding wheel. The wear resistance of ceramic steel pipes mainly lies in the inner layer of a few millimeters thick corundum layer, with a Mohs hardness of 9, second only to diamond and silicon carbide. Among all oxides, its hardness is the highest.

    The ceramic wear-resistant steel pipe with inner lining is manufactured using self propagating high-temperature synthesis centrifugal method. The melting point of corundum in the ceramic steel pipe is 2045 ℃. Due to the special structure of the corundum layer and the steel layer due to process reasons, the stress field is also special. At room temperature, the ceramic layer is subjected to compressive stress, while the steel layer is subjected to tensile stress. The two are opposed and unified, forming a balanced whole. Only when the temperature rises above 400 ℃, due to the different coefficients of thermal expansion between the two, the new stress field generated by thermal expansion cancels out the existing stress field in the ceramic steel pipe, resulting in a free equilibrium state between the ceramic layer and the steel layer. When the temperature rises to 900 ℃, the lined ceramic wear-resistant steel pipe is placed in cold water and soaked repeatedly. The composite layer does not crack or collapse, exhibiting unparalleled thermal shock resistance compared to ordinary ceramics. This performance is very useful in engineering construction. Due to its outer layer being made of steel and the fact that the inner layer does not crack even when heated, flanges, blowing ports, explosion-proof doors, etc. can be welded during construction, and direct welding methods can also be used for connection. This is better than wear-resistant cast stone pipes, wear-resistant cast steel pipes, rare earth wear-resistant steel pipes, bimetallic composite pipes, steel plastic pipes, and steel rubber pipes, which are not easy to weld or cannot be welded during construction. The ceramic wear-resistant steel pipe with inner lining has good mechanical impact resistance, and the composite layer does not break or fall off during transportation, installation, tapping, and self weight bending deformation between the two supports.

    In practice, after 1-2 years of use, the ceramic lined wear-resistant steel pipe is opened for observation and measurement, and there is no obvious wear or peeling of the composite layer. In terms of pipes of the same specifications and unit length, the weight of the ceramic lined wear-resistant steel pipe is only about half of that of the wear-resistant cast steel pipe or bimetallic composite pipe, and its engineering cost per meter is reduced by 30-40%. It is only about 2/5 of the weight of the cast stone pipe and rare earth wear-resistant steel pipe, and the engineering cost per meter is reduced by more than 20%. The price of ceramic lined wear-resistant steel pipes used in corrosive or high-temperature environments is only a fraction of that of stainless steel pipes and nickel titanium pipes.

    Fluid pipeline transportation is not only applied in the power industry, but also in industries such as metallurgy, coal, petroleum, chemical industry, building materials, machinery, etc. When conveying materials with high grinding properties in pipelines (such as ash, coal powder, mineral concentrate, tailings cement, etc.), there is a problem of fast pipeline wear, especially fast bend pipe wear; When transporting highly corrosive gases, liquids, or solids in pipelines, there is a problem of the pipeline being corroded and quickly destroyed; When transporting materials with high temperatures in pipelines, there are problems such as the high cost of using heat-resistant steel pipes. The launch of ceramic lined wear-resistant steel pipes has solved these problems with ease.

    purpose

    In addition to being used in coal-fired power plants for ash removal, slag discharge, powder delivery, and powder return, ceramic lined wear-resistant steel pipes are also widely used in the following industries:

    1. Mines: coal water slurry, coal washing slurry, mine filling materials, and coal powder in the coal industry;

    2. Metal mines: pipeline transportation of concentrate and tailings.

    3. Metallurgy: The blast furnace coal injection and slag transportation pipelines for ironmaking in steel plants; The preferred pipeline for conveying ferroalloys and refining outside the furnace in steelmaking.

    4. Cement plant: conveying raw material slurry, coal powder, feeding from elevators, and concrete conveying pipelines in rotary kiln wet production lines.

    The ceramic wear-resistant steel pipe with inner lining has excellent comprehensive properties such as wear resistance, anti-corrosion, and anti scaling, which can extend the service life of the pipeline. This product has been included in the National 863 New Materials Technology Project.

    Product Usage

    Widely used in coal conveying systems for thermal power generation, as well as in feeding and batching systems for industries such as metallurgy, steel, and cement, such as coal hoppers, raw coal hoppers, receiving hoppers, drum packaging, fan impellers, dust removal pipelines, chutes, etc.

    Transportation and installation instructions:

    1. Wear resistant ceramic lined pipes should avoid serious collisions during loading, unloading, transportation, and installation. It is strictly prohibited for metal tools to directly contact or impact the ceramic layer.

    2. When installing a bend, the direction indicated by the arrow on the surface of the bend must be consistent with the flow direction of the conveying medium. Generally, the longer section of the bend is in the outlet direction.

    3. The pipeline can be directly welded, with a groove of 70 °~90 ° and a blunt edge of 2-4mm. It is recommended to use low current welding.

    4. When using flange connection, the flange section must be flush with the end face of the ceramic composite pipeline.

    5. When using flexible quick joints, our company is responsible for welding the pipe joints and lining them with ceramics. The installation should refer to the installation manual for quick pipe joints.

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