Refractory Steel Fiber

The refractory stainless steel fiber is made by extracting the heat-resistant stainless steel melt at one time by using the metallurgical process-melt rapid quenching method. Compared with the steel fiber of the usual metallurgical process, it has the following advantages:

(1) The process flow is short and the price is cheap;

(2) The rapid quenching process makes the steel fiber have a microcrystalline structure, high strength and toughness;

(3) The cross-section of the fiber is irregular crescent shape, the surface is naturally rough, and the bonding force with the refractory matrix is strong;

(4) It has good high temperature strength and high temperature corrosion resistance.

Properties of refractory stainless steel fiber reinforced unshaped refractories:

The disadvantage of monolithic refractories is their brittle fracture. Adding heat-resistant stainless steel fiber to the unshaped refractory material (castable, plasticity, tamping material, etc.) will change the internal stress distribution of the unshaped refractory material, prevent the crack from expanding, and change the brittle fracture mechanism of the unshaped refractory material into toughness Broken; it significantly improves the performance of unshaped refractories.

The role of refractory stainless steel fiber:

Reinforcement: Through the analysis of composite material theory and fiber spacing theory, it is proved that stainless steel fiber has the potential to withstand high cracking resistance, and its tensile strength is significantly improved. At the same time, the crystal structure is formed due to the rapid cooling of the fiber during the melt extraction process. , this structure enables the fiber to obtain high elongation and high tensile strength, and improves the stress structure of the refractory concrete during the drying and heating process, so that the refractory body only produces local microcracks, highlighting the good reinforcement.

Application fields of refractory stainless steel fiber:

1. Metallurgical industry: furnace roof, furnace neck, furnace door, burner brick, water-cooled pipe wrapping, tapping groove bottom, stepping furnace bottom, annular furnace fire retaining wall, soaking furnace cover, protruding belt, sand Sealing, tundish cover, triangular area of electric furnace, ladle lining, lance for refining outside the furnace, bottom blowing oxygen flue, molten iron ditch cover, slag retaining weir, various refractory linings in blast furnace, coking oven door, etc.

2. Cement industry: chain belts of revolving windows, heating belts, heater covers, air inlets and combustion pipes, and other kiln parts that are easy to grind and impact.

3. Petrochemical industry: Steel fibers are used in sliding valves in petrochemical devices and pressure blowing pipes in crack areas to increase thermal shock resistance and wear resistance.

4. Conveyor line, lifter and cyclone lining, reinforced with steel fiber, can prevent it from delamination, wear and cracking, burner brick, furnace roof, transmission part and heater rough mouth, after casting with steel fiber , Eliminate and reduce cracks and peeling.

5. The bypass flue of the petroleum catalytic cracking unit uses steel fiber castables to solve the problems of thermal shock and thermal cycle.