Product Description:

Coal washing special polyacrylamide PAM is a more professional polyacrylamide. In fact, only the internal chemical composition content has been adjusted. Special polyacrylamide for coal washing The effect of special polyacrylamide for coal washing is several times better than that of ordinary polyacrylamide. The effect is very obvious in coal washing and filtering, or in the discharged groundwater. Its reaction time is about 5 seconds. The precipitation effect can be seen, so many coal mines choose special flocculant for coal washing. The coal mined in coal mining usually contains some impurities, and the separation efficiency of coal and impurities can be improved by adding flotation agent. The clean coal floated out and the tailings settled. The clean coal in the coal is then back-tailed by settling, filtering or centrifuging. Polyacrylamide PAM is used in the settling process, thereby facilitating solid-liquid separation. Then it is sent to the thickener, and the clear water is recovered and recycled by the overflow of the thickener. Pulverized clean coal is recovered by filtration and centrifugation. Re-addition of polyacrylamide during filtration and centrifugation improves separation efficiency. In order to meet the needs of users, we have produced a special flocculant for coal washing, which has a better effect on different coal mines and greatly reduces the dosage of dosing.

Technical indicators:

Specific use:

The special polyacrylamide PAM for coal washing is a mixture of water and fine coal powder in the coal industry, coal slurry water in coal preparation plants, and ground flushing wastewater in coal-fired power plants. Its main characteristics are high turbidity, fine solid particle size, and many negative charges on the surface of solid particles. The repulsion between the same-sex charges keeps these particles dispersed in the water and is affected by gravity and Brownian motion; due to the interaction between solid particles in slime water (such as adsorption, dissolution, combination, etc.), the nature of coal washing wastewater is quite complex, not only has the nature of suspension, but also has the nature of colloid. A large number of coal washing wastewater is not up to standard discharge, resulting in water pollution, river silting, slime loss, caused great economic losses to the country, but also makes the coal industry more scarce water resources, seriously restricting the development of coal production, so the development of coal washing wastewater efficient treatment of new technologies have important significance. Special polyacrylamide for coal washing in order to make the slime water in the concentration tank rapid precipitation, to ensure qualified washing water and filter slime production, so that the production of efficient and economic operation, must choose the appropriate flocculant to strengthen the treatment of slime water. Through the production practice in recent years, it has been proved that polyacrylamide has a good effect on coal slime treatment, which can accelerate the sedimentation of coal slime and contribute to the production of pressure filtration.

Method of use:

1, when using, with a concentration of 0.01-0.05 aqueous solution, to use neutral water without salt debris is appropriate.

2. When dissolving, the anionic polyacrylamide (APAM) product is evenly sprinkled into the stirred water, and the stirring speed is controlled at 100-300rpm. Appropriate heating (< 60 ℃) can accelerate dissolution.

3. Adjust the PH value of the treated liquid to make the anionic polyacrylamide (APAM) product fully play its role, and select the best PH value and the dosage of this series of products through experiments.

4. When adding anionic polyacrylamide (APAM) product solution, the mixing with the treated solution should be accelerated. After flocs appear, the stirring speed should be slowed down to facilitate the growth of flocs and accelerate sedimentation.

Note:

1, coal washing special polyacrylamide PAM for the treatment of coal sludge sewage, must add the appropriate amount to effectively play its flocculation effect. It can be determined by experiments according to the selected slime water treatment process and the nature of the slime water. Less dosage will cause the slime settling speed to slow down, and the concentration overflow will easily exceed the standard, which cannot guarantee the required circulating water index.

2. Excessive dosage speeds up the sedimentation rate of coal slime, but it is easy to cause the concentration of concentrated underflow to be too high. Excessive dosage sometimes causes the concentration of concentrated underflow to be as high as 700g/L or more, and the content of polyacrylamide in underflow increases, which is unfavorable to underflow transportation and pressure filtration. The coal cake is not easy to fall off during pressure filtration and unloading of coal cake, and also causes pharmaceutical waste. Generally, the concentration of concentrated underflow is required 500g/L, can meet the pressure filter production.

3, the special polyacrylamide for coal washing must be effectively dispersed and carefully dissolved to avoid the rapid dissolution of the powder surface, which leads to the mutual adhesion of the particles, resulting in the "fish eye" that fails to dissolve inside the particles ".

4. The dissolved flocculant has poor storage stability and should be used within 24 hours after dissolution. If the viscosity will decrease after 2-3 days, the function will decrease.

Packaging and storage:

25 kg/bag (plastic kraft paper bag lined with plastic bag).

This product is non-toxic, pay attention to moisture, rain, avoid sun exposure.