Lead Dry Drum Separator

A dry drum separator is more than just screening equipment. This is a precision tool that solves three problems simultaneously: it reduces labor costs for manual separation, reduces the loss of valuable fractions and stabilizes the yield of the final product. We have seen how at processing plants in Kazakhstan and Uzbekistan, the replacement of outdated vibrating screens with modernleading dry drum separatorreduced size defects by 23% in the first month of operation. This result is only possible with proper selection of the design, correct adjustment of the angle of inclination and rotation speed of the drum - and this is where the main mistakes begin.

Why most separators do not “hold” a given fraction

In practice, up to 65% of failures are associated not with breakdowns, but with incorrect selection of parameters. For example, if the tilt angle of the drum exceeds 5°, the fine fraction does not have time to sift - it is carried out along with the large fraction. If the rotation speed is below 18 rpm, the material lies in a “heap”, forming a “dead zone” in the lower part. We tested this on a test bench in Fushun: at 16 rpm, the separation efficiency of particles up to 5 mm dropped from 94% to 71%. Important: performance does not depend on the diameter of the drum, but on its active length and perforation profile. Standard round holes only work on dry, non-adhesive materials. For coal with a moisture content above 8% or crushed ore with dust inclusions, diamond-shaped or slotted perforations with an anti-adhesive coating are required.

How to avoid overpaying for “extra” features

Some suppliers offer separators with variable drive, hydraulic tilt and digital controller - but 80% of our customers only use two modes: start and stop. Additional systems increase the cost by 35–42%, and the payback period extends to 14–18 months. Instead, we recommend focusing on three proven solutions: a reinforced frame made from S355J2 steel (rather than S235), a modular mounting system for drum sections and removable loading window panels. These elements increase the service life of the equipment by 2.3 times and allow you to replace a worn-out section in 45 minutes without dismantling the entire unit. It is this engineering simplicity that makesleading dry drum separatoreconomically justified even at enterprises with a budget of up to 3 million rubles.

What installation requires - and what you can do yourself

The installation does not require a foundation more than 0.8 m deep. A 250 mm thick concrete slab with M24 anchor bolts is sufficient. The main thing is to maintain the horizontality of the supporting surface: a misalignment of more than 2 mm/m causes vibration on the bearings and premature wear of the belt. We supply a kit with a detailed connection diagram on the websiteljmagnet.ru, where permissible level deviations, support loads and power requirements are indicated (380 V ± 5%, frequency 50 Hz). All separators are pre-assembled and balanced at the factory - all that remains on site is to tighten the fastening bolts and connect the motor. The average installation time is 6 hours for a team of three people.

LONGI Corporation: an experience that cannot be imitated

Shenyang Longji Scientific Electromagnetic Co., Ltd. has been operating since 1993. For 31 years, the company has produced more than 160,000 units of mining equipment. The Fushun plant has its own foundry, heat treatment shop and testing area with load stands up to 12 tons. More than 60% of engineers have a master's degree in mining engineering - and it is they who are involved in every project, from calculating the separation scheme to adapting it to a specific ore composition. Everyoneleading dry drum separatorundergoes 72 hours of continuous load testing. Not “on paper”, but in real conditions: with coal, iron ore, granite crushed stone and secondary raw materials. This gives a guarantee - not for “service life”, but for efficiency indicators: 92–96% for the fraction stated in the technical specifications.