Luoyang Luoling Bearing Technology Co., Ltd.
Eighteen days of continuous on-line filtration turned a black, turbid salt bath into a clear one.
Background
After long continuous operation, oxide scale, salt sludge and carbon black accumulate in the quench bath. The salt turns black, suspended solids become visible, and cooling characteristics drift. Conventional skimming only removes floating crust; it cannot touch the fine particles suspended in the melt.
What we did
Pump-type high-pressure filtration unit on site
A pump-type high-pressure filtration unit was mobilised and commissioned on 20 June; filtration started at 16:52 the same day.
A 20-mesh screen ran for the first 24 hours while retained solids and flow were monitored.
On 22 June the unit was cooled down and the screen changed to 10 mesh for the second stage, balancing throughput and fine-particle capture.
Three operators worked in shifts, sampling every four hours and logging equipment status until demobilisation on 7 July.
What changed
- The salt went from black and turbid to clear amber with no visible suspended particles.
- The screens retained a substantial load of oxide scale, salt sludge and carbon black.
- The customer took independent samples during the campaign; all checks passed.
Other cases
Hongyuan Bearing
Installation, two-stage filtration and furnace cleaning completed in four days; both customer re-checks passed.
Hailin Zhongke
A cross-province campaign: transfer filtration plus furnace cleaning, both passed re-inspection — followed by a quench-oil filtration contract.
Tell us what your bath is doing.
We will tell you what to do next.
One call is enough to establish three things: where your bath stands today, which step comes first, and how long it takes.