How to prevent slurry overflow from the drum screen

Usually, overflow occurs when the coal slurry concentration is too high. In addition to controlling the concentration, an anti-leakage control switch can also be installed to issue an alarm promptly when leakage takes place, alerting the operators.

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Roller screens are also useful for water-coal slurry; let’s talk about it and learn more.

It’s easy to control in terms of the manufacturing process; won’t improving the equipment be troublesome? To ensure proper control in the manufacturing process, it is necessary to analyze changes in the slurry concentration and coal type in a timely manner, conduct inspections of the grinder to check whether its operation is stable and normal, and determine whether the grinder is under overload ； For control via the equipment, could considering adjusting the ratio and quantity of the steel rods in the mill be used to control the concentration of the coal slurry in order to achieve the desired outcome?

This post was last edited by jensse on 2012-11-28 at 15:06. The idea mentioned above is good; it can be used as a reference. Let me know if it works

Put a steel rod on the sieve and give it a try; there are reports saying this works:)

Generally, when the concentration of the water-coal slurry is too high, or if the supply of additives is interrupted, it can cause leakage from the grinder. During production, on-site personnel should conduct regular inspections to monitor the concentration, and adjust the amount of water added as well as the flow rate of the additive pump promptly.

I mainly want to increase the slurry concentration, but when the concentration rises, the drum screen experiences overflow. Are there any ways to improve the equipment, such as by changing the height of the overflow weir?

It is possible to consider using a drum sieve; by ensuring the desired particle size, it is possible to increase the sieve’s permeability and alter the distribution of its sieve holes. I have seen this in some manufacturers’ products

Personally, I think we can make some adjustments by 1. changing the size of the holes in the drum sieve, and adding a second stage of filtration mesh； 2. Another adjustment can be made based on the particle size distribution of the coal slurry. 3. While ensuring accurate cost accounting, it is possible to increase the dosage of additives (there are many types of additives available in China; I recommend the naphthalene-based organic polymer hydroxyl-type anionic additive produced by Ningxia Nanyi Chemicals. This additive has performed well in our company’s tests – it allows for a concentration increase of up to 63%, a viscosity level of 800, and good stability) ； To increase the concentration, it is necessary to consider both the chemicals used and the equipment; however, based on successful experiences, the coal slurry concentration should be kept at 60–61%, which makes things simpler in terms of both the equipment required and the operations carried out by the staff