Sand washing and coal washing

Coal Washing

Coal washing wastewater contains oily fine coal powder and clay suspended matter, which have extremely strong suspension properties in water. Therefore, it is difficult to remove the substances by the common natural sedimentation method. Moreover, coal washing wastewater has characteristics of high coloration, high turbidity and high chemical oxygen demand. Many customers have a headache in the treatment of coal washing wastewater. Here, Gongyi Filter Industry company will explain to you how to use polyacrylamide to effectively treat impurities in the water and restore the wastewater to clean water.

Gongyi Filter Industry engineer has found in many experiments that the use of flocculation method to treat coal washing wastewater can reduce water consumption costs, and the wastewater can recycle coal slime to reduce coal loss. It has both economic benefits and environmental protection, and is suitable for use in large, medium and small coal washing plants. Many customers don’t know how to choose polyacrylamide when they first start using it. The sewage from different coal mines in different regions is treated differently, so some waste water may not be treated cleanly in the same way. At this time, water samples must be taken. Test first and then pick the right product. After the cinders in the sewage are separated, the cinders can be sold, and the treated water can also be recycled again. During the coal washing process, the PH value of the sewage may become acidic. we can first adjust the PH value to about 7, and then use appropriate polyacrylamide to separate the water and coal slime powder.

Sand washing

If the mud content in the sand used for construction is too high, the strength of the concrete will be reduced during application. Therefore, sand washing is required to remove the mud content during the sand making process, which requires a large amount of water. If a large amount of sand washing wastewater is directly discharged, it will not only pollute the surrounding water environment but also increase the cost of sand washing water. Polyacrylamide is a linear polymer with good adsorption and flocculation effects. The polyacrylamide used for sand washing can efficiently and quickly flocculate and precipitate impurities such as soil in the sand washing sewage. After treatment, the sand washing sewage can be clarified to meet discharge standards or recycled. This will protect the environment and also save sand washing costs.

During the sand washing process, due to the differences in water quality, raw materials and production environments in different regions, the quality of the sand washing sewage produced is also different. When choosing the right polyacrylamide, we generally take some sample water from the sand washing sewage. Sample testing is used to determine, so that the appropriate specifications of polyacrylamide for sand washing can be selected, and the effect will be better when treating sewage. Gongyi Filter Industry has its own sewage water sample laboratory. If you don’t know which specification of polyacrylamide to use, you can send a water sample and we will help you test for free to select the appropriate specification of polyacrylamide.