Different industries and factories use different dust removal filter bags. First of all, we have to analyze which bags are commonly used. The materials of dust removal filter bags include normal temperature type cloth bags, medium temperature type cloth bags, and high temperature filter cloth bags. Different types of cloth bags have different characteristics. Normal temperature type cloth bag: The main material of normal temperature type cloth bag is made of polyester, polypropylene, acrylic and other fiber materials through non-woven and textile technology. Medium temperature type cloth bag: The medium temperature filter material includes aramid fiber and PPS series fiber through impregnation, waterproof, oil-proof and anti-corrosion process, so as to achieve the ideal filtering effect. High temperature cloth bag: The high temperature cloth bag is mainly made of high temperature resistant fiber materials such as P84, expanded glass fiber, and ultra-fine glass fiber.

The use of dry filter bag dust removal technology in blast furnaces has been successful in purifying gas, and the over 5,000 cubic meters of extra-large blast furnace gas in Shougang, Wuhan Iron and Steel and Baosteel all use dry pulse filter bag dust removal technology for operation. The blast furnace gas is dry purified by the filter bag dedusting technology, which replaces the previous two-stage venturi wet dedusting technology. Its outstanding advantages are that it can save 30% of the total investment, save 50% of land, save 200kg/t iron, save more than 70% of electricity, and greatly improve the quality of gas after the water content and dust content are greatly reduced, which can be used for power generation. Or other use, the thermal efficiency is significantly improved. It can also reduce the number of workers and greatly reduce the amount of soot and waste water.

If the blast furnace gas is purified by the dry filter bag dust removal technology, it will save more than 80 million tons of water and reduce nearly 80 million tons of wastewater discharge. The dust filter bag configured by the bag filter used for blast furnace gas purification is made of Nomex needle-punched felt in foreign countries. In China, high temperature resistant dust removal filter bags made of glass fiber and aramid fiber are used.