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What are the applications of fiberglass filter bags in the cement production industry

April 14,2023

During the cement production process, a large amount of smoke and dust with high temperature, high air humidity, and corrosive substances are generated, and the concentration of smoke and dust is high, with a wide coverage of temperature changes. Only glass fiber filter bags with heat resistance, corrosion resistance, and condensation resistance can meet the needs of smoke and dust removal in the cement industry.

Glass fiber filter material

Glass fiber filter bags can be divided into two categories based on the overall content of alkali metal oxides in the glass content. The relative content of alkali metal oxides in E-fiber glass and C-fiber glass is different, which poses a threat to the glass fiber production process and determines the performance of glass fibers and products. Alkali free fiberglass can produce single fiber pores 8-9 μ Fiber. Different fiber diameters result in significant differences in compressive strength, wear resistance, and folding resistance when weaving fiberglass fabrics of the same thickness.

Different glass fiber materials will affect the application environment temperature. Alkali free glass fiber filter bags can be used for a long time at 280 ° C, and can withstand high temperatures up to 350 ° C instantly (within 1 hour). However, the application environment temperature of alkali free glass fiber filter bags is only 260 ° C, and the instantaneous high temperature resistance is within 300 ° C.

Fabric structure of glass fiber filter bags

The breathability and filtration rate of glass fiber filter bags are closely related to the fabric structure, which can be divided into three categories: twill, satin, and double weft.

In the smoke and smoke, the same fabric structure, the breathability of glass fiber filter bags is higher than that of continuous glass fiber filter bags, and the breathability of raw materials for glass fiber filter bags is the highest.

Thickness of glass fiber filter bag

The thickness of the glass fiber filter bag directly determines the elongation at break of this filter material and the filtering wind speed used, which will determine the axial elongation at break of the alkali free continuous glass fiber filter bag and the alkali free glass fiber acrylic yarn filter material.

Surface treatment of glass fiber filter bags

Various types of fiberglass cloth or felt can only be truly transformed into fiberglass filter bags through surface treatment, and can be suitable for application under different working conditions to achieve smoke and dust removal effects.

The smoke and dust generated by different dust emission points have different environmental temperature, humidity, concentration, content, particle size distribution, and harmful gas content in the smoke and dust. In terms of the cement industry, the characteristics of smoke and dust at dust points such as cement rotary kilns, machine vertical kilns, drying equipment, coal mills, cement feed mills, dry feed mills, and grate coolers are not the same. The selection of production processes, raw material preparation, and types of coal combustion vary from place to place and from different manufacturers, resulting in different characteristics of smoke and dust. Professional surface treatment agents must be used to treat fiberglass and surface treatment formulas.

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