I. Product Introduction
Cast stone is a non-metallic wear and corrosion-resistant material made by melting and casting natural rocks such as diabase and basalt or industrial waste slag, along with additives like amphibole, dolomite, and fluorite, and crystallizers such as chromite and magnesite. It undergoes processes like melting, casting, crystallization, and annealing. The products include plates, bricks, pipes, and various non-standard materials. These materials, in various sizes and shapes, are collectively referred to as cast stone products.
Cast stone molding processes include melt casting, sintering, and hot direct casting. Currently, cast stone products are widely used in industries such as building materials, chemicals, metallurgy, and mining. Cast stone is an ideal substitute for steel, iron, lead, rubber, wood, and other materials in many equipment parts, offering superior wear resistance and corrosion resistance to acid and alkali, which are not achievable by general metals. It also extends the service life of equipment, reduces maintenance time, improves production efficiency, and lowers product costs. Cast stone has been used in anti-corrosion engineering for decades, characterized by its dense structure, low water absorption rate, high compressive strength, and good wear resistance. It has excellent corrosion resistance to almost all inorganic acids, organic acids, alkalis, salts, water, and organic solvents, except for hot phosphoric acid above 30℃ and alkali solutions. Cast stone is a brittle material with high hardness, but its major drawback is its high brittleness and difficulty in withstanding impacts from heavy objects.
The cast stone products have a low SiO2 content, but due to the high-temperature melting process, a protective layer forms upon crystallization, reducing chemical corrosion of the medium to near zero. This is the primary reason for the cast stone's high resistance to acid.
Cast stone plates are divided into three main categories: standard, standard irregular, and special irregular shapes. Standard plates include rectangular, trapezoidal, hexagonal, sector, and circular plates; standard irregular plates consist of curved plates, trough lining plates, slag groove straight groove lining plates, etc.; special irregular plates feature double-curved panels, conical panels, sieve strip cast stone plates, as well as slag groove bends, variable diameter, confluence, two-way, and three-way junction plates. All types of equipment lining cast stone plates are included in the products of the aforementioned categories.
Scope of Use
1. Power Generation Industry: Coal chutes, coal bins, coal storage silos, dry coal grids, dumpers, slag recovery machines, water treatment, etc.
2. Chemical Industry: Corrosion-resistant flooring, pump foundations, etc.
3. Coal Industry: Wear-resistant linings for coal storage bins, gangue storage bins, medium barrels, scraper conveyors, bucket elevators, chutes, and screen under funnels, etc.
4. Steel Industry: Blast furnace blending silos, sintering silos, feeders, pelletizers, etc.