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| Metal Filter Mesh refers to a type of filtering element made from metal materials, processed into a mesh structure through weaving, perforation, sintering, etching, and other techniques. Its core function is to achieve impurity separation, precision filtration, and medium purification in fluid (liquid, gas) or solid particle systems. It is widely used in industrial production, food processing, environmental protection, and other fields, with the advantages of high temperature resistance, high pressure resistance, and reusability. 1. Core Materials and Characteristics Stainless Steel: The most commonly used material, with mainstream grades 304 and 316L. 304 stainless steel filter mesh is resistant to general acids and alkalis and has strong rust resistance, suitable for food processing and water filtration scenarios; 316L contains molybdenum, resistant to seawater and strong corrosive media (such as chemical waste liquids), making it suitable for marine engineering, pharmaceutical and chemical fields. Brass: It has good thermal conductivity and ductility, moderate filtration precision, and high surface gloss. It is mostly used for low-pressure, normal-temperature gas filtration (such as air conditioning fresh air systems) or decorative filtration scenarios. Its cost is lower than that of stainless steel, but its corrosion resistance is weaker. Titanium & Titanium Alloy: High temperature resistant (can withstand temperatures above 600ºC), strong corrosion resistant (resistant to aqua regia and concentrated nitric acid), and lightweight. It is suitable for harsh scenarios such as aerospace, high-end chemical industry (such as nitric acid production), and high-temperature flue gas filtration, with relatively high cost. Nickel Alloy: Represented by Monel 400 and Hastelloy C-276, it is resistant to acids, alkalis, and high-temperature oxidation. Suitable for strong corrosion and high-demand fields such as hydrometallurgy and nuclear industry, it can work stably in the temperature range of -100ºC to 650ºC. Mild Steel: Low cost and good toughness, but prone to rust. It needs to be galvanized or powder-coated, and is mostly used for temporary filtration (such as sediment filtration in construction) or low-demand solid particle separation scenarios. 2. Main Processes and Product Forms Woven Process: Metal wires (diameter 0.02mm-2mm) are woven in warp and weft directions, with square or diamond mesh holes. The filtration precision is 1-500μm. The product is mostly in roll form (width 0.5-3m, length 10-50m) or sheet form (conventional 1m×2m), suitable for fine filtration (such as pharmaceutical intermediate filtration). Perforated Process: CNC punch presses are used to punch round holes, square holes, and oblong holes on metal plates (thickness 0.1-10mm). The hole diameter is 0.5mm-50mm. The mesh surface is flat and has high strength, mostly used for large particle filtration (such as ore screening) and equipment protection-cum-filtration scenarios (such as fan air inlets). Sintered Process: Metal powder, metal fibers, or metal mesh layers are stacked and sintered at high temperature to form a porous structure with a porosity of 30%-60%. It is resistant to high pressure and impact, and can be made into filter cores and filter cartridges, suitable for high-temperature and high-pressure fluid filtration (such as oil slurry filtration in petroleum refining). Etched Process: Chemical etching is used to form precision micro-holes on ultra-thin metal foils (thickness 0.01-0.5mm). The hole diameter is uniform (error ≤0.01mm), suitable for high-precision filtration scenarios in microelectronics and optical instruments (such as photoresist filtration in chip manufacturing). 3. Core Advantages High Durability: Compared with plastic and paper filter meshes, metal materials are anti-aging and wear-resistant, can be reused through cleaning (water washing, pickling, high-pressure spraying), with a service life of 1-5 years, reducing long-term use costs. Wide Environmental Adaptability: It can withstand a temperature range of -200ºC to 800ºC (depending on the material) and a pressure of 0.1-30MPa, suitable for harsh environments such as strong acids, strong alkalis, and high-temperature flue gas, with no deformation or dissolution risk. High Filtration Controllability: The mesh size and porosity can be precisely customized, enabling both coarse filtration (separating millimeter-level particles) and fine filtration (separating micron-level impurities) to meet the precision requirements of different industries. Safety and Compliance: Food-grade stainless steel (meeting FDA standards) and pharmaceutical-grade materials (meeting GMP standards) can directly contact food and pharmaceuticals without releasing harmful substances, suitable for high-safety requirement scenarios. 4. Main Application Scenarios Chemical Industry: Used for acid-base solution filtration, catalyst recovery, and chemical waste gas dust removal. 316L stainless steel woven mesh or nickel alloy sintered filter cores are commonly used. Food Processing: Filtration of beer and fruit juice (removing pulp and impurities), clarification and filtration of soy sauce and vinegar. 304 food-grade stainless steel perforated mesh or woven mesh is selected to ensure compliance with food safety standards. Pharmaceutical Industry: Filtration of pharmaceutical intermediates, liquid decarbonization, and sterile air filtration. Stainless steel sintered filter cartridges or etched meshes are mostly used to meet GMP cleanliness requirements. Automotive Industry: Engine oil filtration, transmission oil filtration, and paint mist filtration in coating workshops. Stainless steel welded mesh or perforated mesh is commonly used, which is resistant to high temperature and engine oil corrosion. Water Treatment: Sediment filtration in municipal sewage treatment, suspended matter separation in industrial wastewater, and pre-filtration in household water purifiers. 304 stainless steel woven mesh or perforated mesh is mostly used, which is easy to clean and rust-proof. |
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