Lime Slaker
Detention-type slakers that convert quicklime to a stable milk-of-lime slurry, complete with grit removal and vapour scrubbing, delivered as a single skid that lands on a plinth and runs.
How it works
- Quicklime is metered into the slaking chamber by a volumetric or gravimetric feeder.
- Water is added on ratio control to hold the slaking chamber between 82 and 85 °C — the temperature band that gives the highest-reactivity hydrate.
- Retention of 15 to 25 minutes completes the reaction; paddles keep the chamber homogeneous and prevent lime balls.
- The slurry is diluted to the delivery concentration and passes to a grit classifier, which removes unreacted core and silica.
- Vapour from the chamber passes through a wet scrubber before venting.
| Parameter | Value |
|---|---|
| Capacity | 0.5 – 8 TPH as quicklime (CaO) |
| Water : lime ratio | 3.5 : 1 to 5 : 1 by weight, ratio controlled |
| Slaking temperature | 82 – 85 °C, thermostatically held |
| Retention time | 15 – 25 minutes |
| Slurry concentration | 10 – 20 % Ca(OH)₂ at discharge |
| Grit removal | Inclined screw classifier with dewatering zone |
| Automation | Semi-automatic standard; fully automatic with PLC option |
| Installation | Skid mounted — single lift, single plinth |
Size and selection
Standard build sizes. Filtration areas are calculated from the geometry, not nominal — a FLS-05 is exactly what the arithmetic says it is. Intermediate and larger sizes are built to duty.
| Model | Capacity (TPH CaO) | Slaking drive (kW) | Grit classifier (kW) | Slaking water (L/min) | Chamber volume (L) |
|---|---|---|---|---|---|
| FLS-05 | 0.5 | 1.5 | 1.0 | 33.3 | 833 |
| FLS-10 | 1.0 | 2.0 | 1.0 | 66.7 | 1667 |
| FLS-20 | 2.0 | 3.0 | 1.0 | 133.3 | 3333 |
| FLS-30 | 3.0 | 4.0 | 1.5 | 200.0 | 5000 |
| FLS-50 | 5.0 | 5.0 | 2.0 | 333.3 | 8333 |
| FLS-80 | 8.0 | 6.0 | 2.5 | 533.3 | 13333 |
The area you need comes from a test, not from this table. Send the slurry, the throughput, the target cake moisture and any wash requirement, and we will size the machine against a leaf or pilot test so that the offer carries a guaranteed duty. Try the sizing calculator →
Materials of construction
| Parameter | Value |
|---|---|
| Slaking chamber | SS 304 · SS 316L |
| Paddles and shaft | SS 304 with hardfaced tips |
| Grit classifier | SS 304 · mild steel epoxy |
| Dilution and slurry tank | SS 304 · MS rubber lined |
| Skid frame | Mild steel, epoxy painted |
| Vapour scrubber | SS 316L · polypropylene |
Scope of supply
- Slaking chamber with paddle agitator and drive
- Lime feeder — volumetric screw or gravimetric belt
- Water ratio control valve, flow meter and temperature control loop
- Grit classifier with dewatering discharge
- Dilution tank with agitator
- Vapour scrubber and exhaust fan
- Skid frame with all interconnecting piping and wiring pre-installed
- Local control panel
Not included as standard
- Civil foundation, grouting, anchor bolts and civil works
- Erection, alignment and commissioning supervision unless separately quoted
- Slurry feed pump, vacuum pump and filtrate pump unless listed in scope
- Power, air, water and effluent lines up to the equipment terminal points
- Instrumentation beyond the items listed in scope of supply
- Any statutory approvals, insurance or third-party inspection charges
Options
| Option | What it does |
|---|---|
| Gravimetric feeder | Loss-in-weight feeder for tight CaO dosing accuracy |
| Fully automatic PLC | Recipe control, temperature trending, remote enable |
| Lime silo and bin activator | Storage, aeration and discharge to the feeder |
| Slurry ring main | Circulating loop with back-pressure valve to prevent settling |
| Paste slaker configuration | Higher-density paste for lower footprint duty |
Applications
- Water and effluent treatment — pH correction and softening
- Flue-gas desulphurisation
- Sugar refining — carbonatation
- Mineral processing — pH control in flotation and leaching
- Paper — causticising and lime mud reburning circuits
Utilities at battery limit
| Parameter | Value |
|---|---|
| Power | 415 V ± 10 %, 3-phase, 50 Hz, 4-wire |
| Control supply | 240 V AC 1-phase / 24 V DC |
| Instrument air | 6 bar (g), oil-free, dew point −20 °C |
| Vacuum | By Filcare-supplied pump or client system, at battery limit |
| Wash water | Client supply at 3 bar (g), free of suspended solids > 200 µm |
Inspection and test
- Material test certificates (EN 10204 3.1) for all pressure-retaining and wetted plate
- Dye-penetrant examination of wetted welds
- Hydrostatic / leak test of vat, drum and filtrate lines
- Dimensional inspection against approved GA drawing
- No-load trial run at works: rotation, valve timing, agitator sweep
- Drive and gearbox test certificates from the OEM
Painting and finish
Surface preparation to SA 2½, two coats epoxy primer (2 × 40 µm DFT) and two coats epoxy finish (2 × 50 µm DFT). Stainless steel parts supplied pickled and passivated, unpainted.
Downloads
Certified data is issued with the approved general-arrangement drawing.
Send us the slurry. We will send you the machine.
Slurry description · solids wt % · throughput · target cake moisture · wash requirement · temperature and pH. Offers are prepared by Mr. T. Srikanth.