Mine: Mine filling, concentrate powder and tailings transportation have serious wear and tear on the pipeline. The service life of the ore powder transportation pipeline used in the past, such as Panzhihua and Daye Mine, is less than one year. Changing to this pipe can increase the service life by about 5 times.
Coal: Coal preparation and long-distance pipeline coal transportation generally adopt wet transportation, which requires the transportation pipe to be both wear-resistant and corrosion-resistant. The use of this pipe can be used as a long-life transportation pipe, and the economic benefits are considerable.
Other
(1) The tube does not contaminate and does not stick to molten aluminum. It is currently the ideal material to manufacture aluminum melting equipment, aluminum liquid conveying pipes, and liquid risers that are sensitive to iron pollution and require heavy labor for finishing and maintenance after use.
(2) The tube has good wear resistance and heat corrosion resistance. It is suitable for conveying corrosive materials containing solid particles, high-temperature corrosive gas, sulfur-containing geothermal water and other corrosive media.
Brief introduction of ceramic composite pipe
The ceramic composite tube is manufactured by self-propagating high temperature synthesis-centrifugation method. It is to put the seamless composite tube in the tube mold of the centrifuge, and add a mixture of iron red and aluminum powder into the composite tube, which is called thermite in chemistry. After the centrifuge tube mold rotates to a certain speed, the thermite is ignited by a spark, and the thermite immediately burns by itself, and the combustion wave spreads rapidly. During the spread, a violent chemical reaction occurs, and a large amount of heat is released at the same time. Such heat can reach 3860K and 3600K under thermal conditions, which makes the original material in the composite tube and the product after the reaction, that is, alumina (commonly known as corundum) with a melting point of 2045 °C, all become molten.
Since the reaction is very fast, only a few seconds, the molten reactants are quickly separated according to the specific gravity under the action of centrifugal force. The specific gravity of iron in the product (7.85g/cm3) is twice that of alumina (3.95g/cm3), the heavier iron is thrown to the inner wall of the steel pipe by centrifugal force, and the lighter alumina is distributed in the inner layer of the iron. Due to the rapid heat absorption and heat transfer of the composite tube, alumina and iron quickly reach the freezing point and solidify in layers. The ceramic composite pipe formed afterwards is a corundum ceramic layer, a transition layer mainly composed of iron, and an outer steel pipe layer from the inside to the outside. The molten iron and aluminum oxide molten at high temperature are in contact with the wall of the composite tube, so that the inner wall of the composite tube is in a semi-molten state, so that the iron layer and the composite tube form a metallurgical bond, and the iron layer and the corundum ceramic layer also form a firm bond, and its bonding pressure. Shear strength (that is, the strength when the ceramic is laminated in the axial direction) ≥ 15MPa; the crushing strength of the ceramic composite pipe (that is, the strength when the ceramic in the pipe is crushed from the outside of the pipe) ≥ 350MPa.
