Application of abrasion resistant pipe in dense medium system

Application of abrasion resistant pipe in dense medium system

Serious wear and tear of the pipeline not only caused a lot of material waste and media running, running, dripping, leakage, and frequent pipeline maintenance replacement, increasing the labor intensity of workers, increased production costs.

As the medium pipeline is the transmission of high hardness, abrasive strong media suspension, the pressure of the feed cyclone into the tube, in addition to transport media suspension, but also includes coal and gangue. Therefore, compared with the slime mixed pipeline, the media pipe wear speed faster, especially the pressure pipe, such as the cyclone into the material tube, disengage sieve into the material and so on. According to the different materials and flow channels, the general life of the metal pipe material in about a few months to a year or so.

Coal preparation plant site

Many types of Abrasion resistant pipe, pipe diameter needs to be measured on-site.
In recent years, wear-resistant technology and the rapid development of wear-resistant materials, Abrasion resistant pipe technology in addition to metal mines, construction, power plants and other areas of application, in the field of heavy media coal preparation has also been widely promoted, greatly improving the heavy pipe Of the service life, reducing the maintenance workload and material consumption, and promote the rapid development of heavy media coal preparation technology.

Commonly used wear-resistant media tube

Common wear-resistant pipe mainly stone pipe, ceramic wear-resistant pipe, alloy wear-resistant pipe. Cast stone is a natural rock as the main raw material, by ingredients, melting, burning, annealing made of an inorganic non-metallic materials. It has excellent wear resistance, corrosion resistance.

China’s metallurgical, thermal power, mining, chemical building materials and other departments are widely used cast stone materials. The main raw material for the production of cast stone is the broadly distributed basalt and diabase, which are basic magmatic rocks, and the chemical composition is relatively stable. Cast pipe than the alloy tube wear, tough, and has a high corrosion resistance, can be resistant to hydrofluoric acid and overheating of any acid and alkali corrosion. But the cast stone tube density is high, brittle, impatient impact, easy to break, the production process is complex, installation and maintenance is not convenient.

Ceramic wear tube is made of self-propagating high temperature synthesis centrifuge. The seamless steel pipe on the centrifuge tube mold, in the steel pipe by adding iron and aluminum powder mixture. This mixture is called aluminum heat in chemistry. Centrifuge tube mold rotation to a certain speed, the Mars ignited aluminum heat agent, aluminum heat agent immediately burn their own, burning quickly spread, and in the spread of a violent chemical reaction, aluminum heat agent after the reaction of corundum and iron, At the same time release a lot of heat, is the original material in the steel pipe and the reaction after the product, even if the melting point of 2045 ° corundum will all melt, because the reaction is very fast, only a few seconds, the molten reactant in the centrifugal force, Size to be separated. Iron is centrifugal force thrown to the inner wall of steel, Al2O3 is distributed in the inner layer of iron. As the steel pipe quickly heat and heat transfer, Al2O3 and Fe quickly reached the freezing point, and soon stratified solidification. The final formation of ceramic wear-resistant tube from the inside out, respectively, corundum ceramic layer, iron-based transition layer, and the external steel pipe layer. High temperature molten iron liquid.

And the Al2O3 liquid, contact with the inner wall of the steel pipe, so that the inner wall of the steel pipe in the semi-molten state, so that the formation of iron and steel pipe metallurgical structure, iron layer and corundum ceramic layer between the liquid formation of a strong combination of its combined strength (that is, Laminated strength)> 15MPa; ceramic wear-resistant tube crushing strength (that is, from the tube outside the tube when the strength of ceramic crushing)> 350MPa.