Ceramic Wear Liners Pipe is fundamentally different from traditional steel pipes, wear-resistant alloy cast steel pipes, cast stone pipes, and steel-plastic and steel rubber pipes. The outer shell of the it is made of steel and the inner layer is corundum. The vickers hardness of the corundum layer is as high as 100-1500 (Rockwell hardness is 90-98), which is equivalent to tungsten-cobalt hard gold. The wear resistance is more than 20 times higher than that of carbon steel pipes. The wear resistance of this product mainly depends on the corundum of inner layer with a thickness of several millimeters. Its Mohs hardness is 9, second only to diamond and silicon carbide, and its hardness is the highest among all oxides.
Product Types
Ceramic wear liners pipe are classified according to the production and installation methods, and can be divided into three types of wear-resistant ceramic pipes: patch type, spot welding card type, and integral ceramic ring.
Direct-bond wear-resistant ceramic pipe: Direct-bonded wear-resistant ceramic pipe uses high-temperature strong adhesive to paste the ceramic sheet inside the pipe, and forms a firm anti-wear layer after heating and curing. The chip type wear-resistant ceramic pipe has a simple production process, low cost, short production cycle, and flexible selection of ceramics, and the diameter of the pipe is not limited.
Spot-welded card-type wear-resistant ceramic pipe: This kind of pipe is based on the SMD wear-resistant ceramic pipe, adding spot welding holes and ceramic caps to the middle of the ceramic sheet, which greatly improves the anti-shedding ability and reduces the temperature of the adhesive. The restrictions are also weakened, and a trapezoidal angle is formed between the ceramic sheets of the spot-welded card-type wear-resistant ceramic pipe, the gap is small, and the erosion resistance is strong. However, the production process of this product is complicated and the production cycle is long.
Integral ceramic ring wear-resistant ceramic pipe: The integrally formed wear-resistant ceramic pipe is made by firing the ceramic pipe as a whole, and then using a special filling material to cast it inside the steel pipe. Its inner wall is smooth and seamless, resistant to wear and corrosion. It has strong anti-erosion performance and can operate at high temperature, but the production cycle of the overall ceramic ring wear-resistant ceramic pipe is long and the cost is high.
Centrifugal Casting Composite Ceramic Pipe:Centrifugal casting composite ceramic pipe is a composite pipe manufactured by “self-propagating high temperature synthesis – high-speed centrifugal technology”, which forms a uniform, dense and smooth ceramic layer and transition layer at high temperature and high speed.
Product parameters
| Items | Specifications |
| Content of alumina | ≥92% |
| Density | ≥3.6 g/cm3 |
| Rockwell A hardness | ≥82HRA |
| Impact strength | ≥1200 MPA |
| Fracture toughness | ≥3.8MPa·m1/2 |
| Vickers hardness | ≥1150HV10 |
| Bending Strength | ≥290MPa |
Application Industry
Pipelines of power plant boiler pulverizing system, including powder conveying pipeline, coarse and fine powder separator pipeline, coal falling pipe, primary air duct, secondary air duct, tertiary duct and burner duct of combustion system, as well as ash and slag discharge system. Slag pipeline, powder return pipeline, dry ash conveying pipeline;
Steel plant raw material conveying pipeline, receiving pipeline, dust removal pipeline, ash discharge pipeline, ash falling pipeline, batching mixing pipeline, grinding outlet pipeline, coal burning pipeline, pulverized coal pipeline, separator pipeline, burner square tube, etc. Tube;
The outlet pipe of the powder concentrator in the cement plant, the inlet pipe of the powder concentrator, the dust collection pipe, the air outlet pipe of the vertical mill, the circulating air pipe, the air pipe of the high temperature fan of the coal mill, the blanking pipe and other worn elbows;
Various pipe fittings for processing and conveying materials in petroleum, chemical, mining, coal, coal washing plants, smelting, papermaking, aluminum industry, building materials, powder engineering, grain machinery, etc.
Product Construction Process
Before construction, the surface of the steel parts to be pasted needs to be treated in advance. After treatment, it reaches the standards of no rust and smooth surface. The ceramic paste is firmer and not easy to fall off.
The glue required during construction, the ratio of different glues is different, and it must be strictly controlled. If the ratio is not suitable, the predetermined viscosity cannot be achieved. The glue can only be used once, and it is not allowed to add glue twice in the middle. If the glue becomes hard, it should be discarded and re-proportioned.
During construction, the quality and quantity should be guaranteed, the glue should be applied evenly, and the paste should be meticulous. After the construction is completed, it can be gently tapped with a rubber hammer, and the construction surface should be flat.
