Selection of flocculant in operation of sludge dewatering machine in mining industries

- May 01, 2019-

When using the sludge dewatering machine in mining industries, it is often necessary to use some flocculant to achieve better treatment results. When selecting a suitable flocculant, the sludge properties must first be considered. For sludge with high organic content, the more effective flocculant is cation. The higher the content of organic matter, the higher the degree of polymerization of cationic flocculant. For inorganic-based sludge, anion can be considered.


Second, pay attention to the pH of the sludge. The pH of the sludge determines the morphology of the hydrolysate, and the same flocculant has a very different effect on the sludge with different pH. If the pH is deviated from the optimum range of the coacervation reaction, it is best to replace it with another one. Otherwise, it is necessary to consider adding acid or alkali to adjust the pH of the sludge before conditioning the sludge.


The concentration of flocculant in the sludge dewatering machine of the mining industry not only affects the conditioning effect, but also affects the consumption of the medicament and the sludge cake output rate of the sludge dewatering machine. The influence of the organic polymer flocculant is more significant. The conditioning effect of the inorganic polymer flocculant is hardly affected by the formulated concentration. The organic polymer conditioning agent is prepared at a concentration of O. 05%~O. 1% is more suitable, the concentration of ferric chloride is 10%, and the concentration of aluminum salt is 4% to 5%.


The temperature of the sludge directly affects the hydrolysis of the flocculant in the sludge dewatering machine of the mining industry. When the temperature is low, the hydrolysis will be slow. If the temperature is lower than 10 °C, the flocculation effect of the sludge dewatering machine will be significantly deteriorated, and the conditioning effect can be improved by appropriately prolonging the flocculation time. When the temperature in winter is low, it is necessary to pay attention to the insulation of the sludge dewatering machine, not less than 15 °C, to minimize the loss of heat during sludge transportation.