As the tube with wear, corrosion resistance, heat resistance, it can be widely used in electric power , metallurgy , mining , coal, chemical and other industries as transport sand, stone , coal , ash, molten aluminum and other materials grinding particles and corrosive media , is an ideal abrasion resistant pipes.
First, metallurgy, electric power industry in the application
Metallurgy, electric power industry, transport coal, ash , mud , lime gypsum slurry , etc. annually consumes a lot of metal pipes . Ceramic composite pipes to replace other channels , with high wear resistance , long life, easy installation, with significant economic benefits of features. Run Power Plant in Shandong Liaocheng , Liaocheng Chinese power plants, Beijing Beijing New Building Materials Group, Henan Hebi power plants, Gansu Pingliang Power Plant , Taiyuan Coal Preparation Plant , Hunan Shimen Power Plant, Hebei Jinniu Energy Limited Gequan CPP , Xingtai Coal Preparation Plant other industrial operation, the operating life of a pipe or even several times more than ten times .
Second, the mines, the coal industry in the application
( 1 ) Mining : Mine filling, transporting ore concentrate and tailings serious wear and tear on the pipe , pipeline ore used in the past, such as Panzhihua , Daye ore and other life less than a year , to improve the life of the tube can 5 times.
( 2 ) Coal: Coal and coal commonly used by long-distance pipelines transporting wet , requiring both abrasion and corrosion resistant pipes , using the tube as longevity pipes , substantial economic benefits .
Third, other
( 1 ) The tube does not stick linking pollution and molten aluminum . Manufacture of iron contamination sensitive to the needs and the use of heavy labor to sort and repair equipment molten aluminum , aluminum hydraulic pipes, lift pipe is the ideal material.
( 2 ) Due to the good wear resistance and heat pipe corrosion . For conveying solid particles containing corrosive materials and high-temperature corrosive gases , sulfur geothermal water and other corrosive media .
SHS- self- propagating ceramic composite pipe Features
1 , good wear resistance
Since the lining layer ceramic composite pipe corundum ceramics (a-AL2O3), Mohs hardness up to HRC90 equivalent of more than 9.0 . So for metallurgy, electric power , mining, coal transportation and other industries grinding media have high wear resistance. Confirmed by the industrial operation : it is ten times the wear life of hardened steel or even several times .
2 , running resistance
SHS ceramic composite pipe due to the smooth inner surface , and never rust, nor as seamless steel pipe inner surface of the convex spiral exists. After internal surface roughness of the test unit and water resistance characteristics of the test , the inner surface smoothness better than any metal pipes, clearing a drag coefficient of 0.0193 , slightly lower than seamless . Therefore, the tube has a running resistance and other characteristics , can reduce operating costs.
3 , corrosion-resistant , anti- fouling
Since the steel ceramic layer (a-AL2O3), a neutral character. So with acid and seawater corrosion resistant , and also has anti-scaling and other characteristics.
4 , heat resistance and good thermal performance punch Fou
Since the alumina ceramics (a-AL2O3), single crystal structure stability . Therefore composite pipe in -50 - the long-term normal operating temperature range of 700 ℃ . Linear expansion coefficient of 6-8 × 10-6/0C, about the pipe about 1/2 . A material having good thermal stability.
5 , low construction cost
Light weight ceramic composite pipe , affordable . Lighter than cast stone pipes with diameter 50% by weight ; 20-30 % lighter weight than the wear-resistant alloy tube , and the wear and corrosion resistance, long life because so hanger fees , handling fees, installation fees and reduce operating costs . By the relevant institute and construction and engineering unit project budget comparison , the tube and cast stone project cost considerably , compared with the wear-resistant alloy tube , down about 20% of the project cost .
6, easy installation and construction
As the light weight of the tube , and good welding performance. Thus can be welded , flanged , fast connection , etc., to facilitate construction and installation , and can reduce installation costs.
Four other knowledge
Ceramic pipe with conventional steel , wear-resistant alloy steel pipe, cast stone and plastic pipe , steel pipe and other rubber has the essential difference. Ceramic pipe is steel outer and inner corundum . Corundum layer Vickers hardness up to 100-1500 ( Rockwell hardness of 90-98 ) , the equivalent of tungsten-cobalt hard gold . High wear resistance than carbon steel pipe more than 20 times , it is much more superior than the usual bonding together corundum wheel performance. Now is still a variety of corundum grinding wheel grinder cut hardened steel main wheel. Ceramic pipe corundum corundum wheel wear layer can be put away . Wear resistant ceramic pipe corundum layer may be formed mainly by a few millimeters thick , a Mohs hardness of 9 , second only to diamond and silicon carbide , all oxides, which is the highest hardness .
Lined steel pipe is the use of ceramic wear SHS - centrifugal method of manufacturing the ceramic pipe corundum melting point 2045 ℃, corundum layer and the steel layer structure due to process special reasons , the stress field is also special . Ceramic layer at room temperature compressive stress , steel layer subjected to tensile stress , the two opposites , into a balanced whole. Only the temperature rises above 400 ℃, since the thermal expansion coefficient between the two , the new stress field generated by the thermal expansion of the ceramic pipe and the stress field in the presence of the original offset each other , so that both the ceramic layer and the steel layer is free equilibrium. When the temperature rises to 900 ℃ ceramic wear the liner pipe into the water Ling , repeated immersion times, the composite layer does not crack or crack , showing the common ceramic unparalleled thermal shock resistance . This performance would be useful in engineering construction , because of its outer layer of steel , coupled with the inner temperature is not cracked in the construction of the flanges, the purge port , explosion doors can be welded directly to the welding method can also be used connection , than wear and cast stone pipe, wear resistant steel pipe , rare earth abrasion steel, bi-metal composite pipe , steel pipe , steel rubber pipe in construction can not easily welded or soldered better. Lined with ceramic wear resistant steel mechanical shock performance is good , while among the transportation, installation and beat two weight bracket bent , not broken off the composite layer .
Currently, dozens of thermal power plants proved that : ceramic wear steel -lined high wear resistance , anti- erosion ability of the fluid . In a wind pipe , pipe wear fastest , wear-resistant ceramic lined pipe elbow abrasion wear resistance than the thick-walled steel elbow increased more than five times .
In practice, wear-resistant ceramic lined pipe using 1-2 years after opening observe and measure , the composite layer no significant wear or fall off, the unit of the same size and length of the pipe , the pipe lined with ceramic wear -resistant and weighs only steel tube mill or bimetallic composite pipe about 1 / 2 , its construction cost per meter 30-40 % lower , and only rare wearable steel tubes and cast stone weight of 2 /5, per meter lower than 20% of project cost . Lined with ceramic wear steel in corrosive or high temperatures used , the price is only stainless steel pipe , a fraction of the nickel-titanium tubes.
Fluid pipeline is not only used in the power industry, but throughout the metallurgy , coal, petroleum, chemicals, building materials, machinery and other industries. When transporting large grinding pipe materials (such as ash , coal , ore concentrates , tailings cement, etc. ) , there is the problem of a pipe wear quickly , especially fast elbow abrasion ; When the pipeline has strong corrosive gases, liquids or solids , are present so as to be quickly corroded pipeline damage problem ; when the pipeline transporting material having a high temperature , there is a very expensive heat-resistant steel pipe and so on. Ceramic wear lined steel pipe market, these problems are solved.