Corrosion-resistant and wear-resistant material--Microcrystalline cast stone slab

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Microcrystalline cast stone sheets are high-tech industrial protective materials with high strength, excellent wear and corrosion resistance. They are made by using industrial waste residues such as coal gangue, metallurgical slag, and mineral processing tailings as the main raw materials, through scientific formulation, high-temperature melting, casting and rolling, as well as controlled nucleation and crystallization processes. The microcrystalline materials produced by this technology are not only radiation-free and pollution-free green products, but also solar-based products that can be recycled as renewable resources. Tests have shown that the various mechanical properties of microcrystalline caststone sheets are superior to those of ordinary caststone; it represents a new generation of industrial products for corrosion and wear resistance. Its wear resistance is more than 10 times that of manganese steel, and more than 30 times that of ordinary steel ； Its resistance to acid and alkali corrosion is 10-25 times that of acid-resistant tiles, ceramic slabs, granite, stainless steel, and polymer materials. It is mainly used for lining anti-corrosion and anti-wear equipment in the power, coal, chemical, and metallurgy industries. In particular, microcrystalline cast stone thin plates have achieved good results in preventing wear and blockages in coal storage bins, chutes, coal drop hoppers, and ash hoppers. New material microcrystalline cast stone panels have been included in the **standard: GB50077--2003 «Code for Design of Reinforced Concrete Silos», as recommended lining materials. Therefore, promoting its widespread use not only helps to save large amounts of valuable non-renewable precious metal materials but also significantly extends the service life of equipment, yielding good economic and social benefits. 1. Microcrystalline cast stone thin plates are mainly used in anti-wear equipment in the coal and power industries: cyclones, coal distribution boxes, coal storage bins, chutes, coal drop hoppers, ash hoppers, as well as in acid and alkali resistance applications in chemical and metallurgical industries for tanks and floors. There are mainly two colors: black and white. Due to the special crystal structure of microcrystalline cast stone, there are strong residual covalent bond forces on its surface. When the material being transported (raw coal) contains moisture, it is easy for a layer with strong adhesion to form – a \"water film\" that not only protects the microcrystalline cast stone from wear but also acts as a lubricant, thereby solving the problems of facilitating the flow of the transported material and preventing blockages. http://www.hntywy.com/images/product01.jpg Rational performance indicators; specification testing items: Cast stone sheets, microcrystalline cast stone sheets – dimensions: 300×300×8-15, 300×200×8-15, 200×200×8-15, 300×200×14-20, 300×200×20-35. Other specifications can be cut to meet customer requirements; the cutting cost is 20 yuan per m2. Wear rate: g/m2 ≤ 0.09, ≤ 0.03. Resistance to rapid temperature changes: 30 cycles. Number of sample pieces per pattern: ≥36/50, ≥38/50. Impact toughness: kj/m2 ≥1.57, >4. Flexural strength: Mp ≥63, ≥70. Compressive strength: Mp ≥588, >800. Coefficient of friction: 0.05. Acid and alkali resistance. Coefficient of thermal expansion (20-300°C): 10-7/°C. Resistance to H2SO4: ≥99%; resistance to 20% H2SO4: ≥98%; resistance to 20% NaOH: ≥96%. Water absorption: 0. Standard-type cast stone sheets and pipes (with a thickness of ≥20 mm) are used for various applications such as chutes, scrapers, and lining materials for ash channels, as well as thick rectangular sheets, trapezoidal sheets, and fan-shaped sheets. Main physicochemical properties of Standard-type cast stone slabs: Test item, Measured value; Test item, Measured value. Wear rate: 0.03 g/m2; Volume density: 2.8 g/m3; Resistance to 30 cycles of rapid heating and cooling: Number of compliant sample blocks/Total number of sample blocks: 38/50; Acid and alkali resistance: 1.84/cm3 for H2SO4, 99.5; Impact toughness: 5.52 kj/m2 for 20% H2SO4, 98.5; Flexural strength: 70.5 Mp for 20% NaOH, 98.2; Compressive strength: 912 Mp; Water absorption rate: 0. As for microcrystalline cast stone powder and microcrystalline cast stone sand, microcrystalline cast stone powder is used to prepare acid-resistant mortar, serving as a bonding agent for lining microcrystalline cast stone slabs, acid-resistant tiles, granite blocks, etc. The paste prepared from microcrystalline cast stone powder features good acid resistance, high wear resistance, low water absorption, low shrinkage, and strong adhesion. Using microcrystalline cast stone powder, it is possible to prepare water glass mortar, Kp-1 mortar, epoxy resin mortar, unsaturated resin mortar, and others. Microcrystalline cast stone sand is used as an aggregate for preparing acid-resistant and wear-resistant concrete; it is employed in the anti-corrosion and wear-resistant concrete used for lining horizontal flues in power plants, in the manufacture of anti-corrosion and wear-resistant concrete fittings, and for casting or precasting acid-resistant concrete components. http://www.hntywy.com/images/product02.jpg Performance specifications of microcrystalline cast stone powder and microcrystalline cast stone sand. Name, Specification, Weight per bag (kg), Technical properties: Microcrystalline cast stone powder – 170 mesh, 140 mesh; weight per bag: 50 kg. Resistance: Not less than 95% against 1.84/cm3 H2SO4, not less than 90% against 20% H2SO4, not less than 83% against 20% NaOH. Microcrystalline cast stone sand – 1-3 mm, 4-6 mm, 6-10 mm