I. Product Introduction
Cast stone is a non-metallic wear and corrosion-resistant material made by processing natural rocks such as diorite and basalt or industrial waste slag with additives like amphibole, dolomite, and fluorite, along with crystallizers like chromite and magnesite, through processes such as melting, casting, crystallization, and annealing. Its products include plates, bricks, pipes, and various non-standard materials. These variously sized plates, pipes, and non-standard objects are collectively referred to as cast stone products.
Cast stone molding processes include melt casting, sintering, and hot direct casting. Cast stone products are now widely used in construction materials, chemicals, metallurgy, mining, and other industrial sectors. Cast stone is an ideal substitute for steel, iron, lead, rubber, wood, and other materials in many equipment parts, offering superior wear resistance and acid-base corrosion resistance that general metals cannot match. It also extends equipment lifespan, 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 resistance to most inorganic acids, organic acids, alkalis, salts, water, and organic solvents, except for hot phosphoric acid above 30°C and alkali solutions. Cast stone is brittle, 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 their high-temperature molten state and subsequent crystallization, they form a protective layer that reduces chemical corrosion of the medium to nearly zero. This is the primary reason for the high acid resistance of cast stone.
Cast stone slabs are divided into three main categories: standard, standard irregular, and special irregular. Standard slabs include rectangular plates, trapezoidal plates, hexagonal plates, fan-shaped plates, circular plates, etc.; standard irregular slabs consist of curved plates, trough lining plates, slag channel straight channel lining plates, etc.; special irregular slabs encompass double-curved panels, conical panels, sieve bar cast stone plates, as well as slag channel bend plates, variable diameter plates, junction plates, two-way branches, and three-way branches. The wide variety of equipment linings, including cast stone slabs, are all included within the products of the aforementioned categories.
Scope of Application
1. Power Generation Industry: Coal chutes, coal bins, coal storage silos, dry coal grates, dump cars, slag recovery machines, water treatment, etc.
2. Chemical Industry: Corrosion-resistant flooring, pump foundations, etc.
3. Coal Industry: Wear-resistant linings for coal storage, gangue storage, medium barrels, scraper conveyors, bucket elevators, chutes, and screen-bottomed hoppers.
4. Iron and Steel Industry: Blast furnace mixing bins, sintering bins, feeders, balling machines, etc.