Filter Presses Facilitate Green Production of Liquid Sodium Silicate

With growing environmental awareness, the resource utilization of agricultural waste has become a trend. Rice husk ash, a byproduct of rice processing, is rich in high-purity silica and is a high-quality raw material for producing liquid sodium silicate. This method not only transforms waste into valuable resources and reduces environmental pollution, but also offers companies a more cost-effective production path. The entire production process primarily involves several key steps: rice husk ash pretreatment, alkaline leaching, solid-liquid separation, and clarification and filtration. Compared to the traditional quartz sand process, the rice husk ash method is more sustainable and represents a key development direction for future liquid sodium silicate production.

Filter presses play an indispensable role in the production of liquid sodium silicate from rice husk ash. After alkaline leaching, the rice husk ash forms a mixture containing liquid sodium silicate and a large amount of solid residue (such as unreacted carbon and undissolved silicates). To obtain high-quality liquid sodium silicate, these solid impurities must be efficiently separated from the liquid. Filter presses are the perfect tool for this task. It applies strong pressure, forcing the liquid (liquid sodium silicate) through the filter cloth while trapping solid impurities on the filter cloth, forming a filter cake. This process not only effectively removes impurities but also maximizes the recovery of useful products, minimizing resource waste.

To further improve production efficiency and product quality, selecting the right filter press is crucial. Chamber filter press and membrane filter press are ideal options for preparing liquid sodium silicate from rice husk ash. Chamber filter press, with their simple structure and ease of operation, are suitable for processing materials with high impurity content. Membrane filter press, by performing a secondary squeeze on the filter cake after filtration, can further reduce the moisture content and improve the recovery rate of liquid sodium silicate. Especially for large-scale production lines, using a membrane filter press can significantly shorten filtration cycles and reduce energy consumption, resulting in significant economic benefits. Therefore, by properly configuring filter presses, companies can achieve automated and efficient production processes, ensuring the purity and stability of the final product. For efficient solid-liquid separation, contact Quanhong Filtration for customized solutions.