Alumina production lines use large settling tanks and digestion tanks that store highly corrosive sodium aluminate slurry long-term, quickly forming hard alumina scale on walls and bottom. Traditional manual hammering cleaning requires over 15 days of shutdown per cycle, causing huge output losses across the line.
Alumina tank infrastructure involves hundreds of millions in investment; our scale cleaners use corrosion-resistant materials, combine multiple units for full-coverage flushing, enable fully automatic cleaning without personnel entering confined spaces, and shorten maintenance time by 80%.
• Manual cleaning shuts down production for 15-30 days
• Hammering off scale affects tank structural safety
• High temperature, strong-alkali slurry burns and oxygen-deficiency asphyxiation
• High-altitude climbing and risk of falling scale injuries
• Fixed nozzles leave cleaning dead zones, causing repeated scale accumulation
• Thickening scale reduces effective tank volume and affects digestion efficiency
| Item (single large digestion tank) | Traditional Manual Cleaning | Huaruida Scale Cleaning |
|---|---|---|
| Manual cleaning labor | RMB 120,000 | RMB 0, automatic with minimal labor |
| Scale removal time per tank | RMB 530,000 (over 15 days) | ≤RMB 80,000 (5 days) |
| One-time equipment investment (20-year life) | RMB 0 | RMB 50,000 |
| Total 1-year cost | RMB 650,000 | RMB 130,000 |
| ROI summary: RMB 50,000 investment saves RMB 520,000 in shutdown and labor costs per tank annually, with equipment cost recovered in just 1.5 months. | ||
Corrosion-resistant: materials suited to long-term strong-alkali alumina slurry corrosion
Full-area flushing: variable-angle multi-dimensional nozzles continuously flush hard scale at 360°
Combined deployment: large-diameter tanks support multiple parallel units, no cleaning blind spots
Man-machine isolation: fully sealed automatic cleaning, completely eliminating personnel entry
Energy reuse: directly reuses the plant's existing high-pressure circulation pump, no new high-power equipment needed
Applicable conditions: scale cleaning of alumina settling tanks and digestion tanksDesigned for cleaning the inner walls of large sealed vessels, widely applicable to alumina settling tanks, digestion tanks, storage tank walls and oil tanker holds, efficiently···
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Applicable conditions: scale cleaning of alumina settling tanks and digestion tanksDesigned for cleaning the inner walls of large sealed vessels, widely applicable to alumina settling tanks, digestion tanks, storage tank walls and oil tanker holds, efficiently···
→ View more
Applicable conditions: scale cleaning of alumina settling tanks and digestion tanksDesigned for cleaning the inner walls of large sealed vessels, widely applicable to alumina settling tanks, digestion tanks, storage tank walls and oil tanker holds, efficiently···
→ View moreWorking principle
Powered by the alumina plant's high-pressure slurry circulation pump, the alkaline liquid drives the nozzles in full-range high-pressure rotation, continuously flushing hard alumina scale off the tank walls, with the scale dislodging and discharging with the slurry — no personnel entry throughout.
Structure features
• Body resistant to strong-alkali corrosion
• Multi-angle adjustable nozzles covering the full wall area
• Fluid-driven, safe and stable at high temperature
• 20-year ultra-long service life
• Modular design, freely add or remove units by tank diameter
Submit the tank diameter and slurry conditions, and our engineers will calculate shutdown production losses and match a complete cleaning equipment solution.
