Beneficiation Equipment

Flotation Machine

CAPACITY

0.2-12（m³/min）

FEED SIZE

Application areas：Roughing, scavenging and cleaning in copper, lead-zinc, nickel, molybdenum, gold-bearing sulfide and non-metallic mineral flotation circuits.

Applicable materials：Copper, lead-zinc, nickel, molybdenum and gold-bearing sulfide ores; fluorite, phosphate, feldspar, quartz, spodumene and selected coal fines, subject to mineralogical analysis and flotation testing.

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Introduction
Advantages
Working principle
Parameters

Product Overview

The XINGAONAI SF Flotation Machine is a self-aerating mechanical flotation cell designed for roughing, scavenging and cleaning duties in mineral-processing plants. The rotating impeller circulates the slurry and creates negative pressure that draws air into the rotor-stator zone, where the air is dispersed into bubbles.

After the slurry has been conditioned with the appropriate flotation reagents, hydrophobic mineral particles attach to the bubbles and rise into the froth layer. The mineralized froth is removed by the scraper mechanism, while the remaining slurry flows to the next cell or leaves the flotation bank as tailings.

SF models are available with effective cell volumes from 0.37 to 20 m³. Model selection depends on dry solids throughput, slurry flow, solids concentration, mineral liberation size, required residence time, flotation duty and the number of rougher, scavenger and cleaner stages.

Key Advantages

Self-Aerating Mechanical Flotation

The rotor-stator system circulates the slurry and induces air into the cell without a separate process-air blower under standard SF operating conditions. Final air intake depends on impeller condition, slurry properties and installation configuration.

Air, Slurry and Froth Handling in One Cell

Each cell combines slurry circulation, air dispersion and froth collection. SF cells can be arranged in banks for roughing, scavenging and cleaning according to the flotation test and process flowsheet.

Stable Slurry Suspension

The impeller promotes internal slurry circulation and helps reduce solids settling in the tank. The actual coarse-particle suspension capability depends on particle size, density, solids concentration and impeller speed.

Adjustable Froth Level

The pulp level and froth depth can be controlled through the outlet gate and circuit configuration. Automatic level control should be described as optional unless it is included in the standard supply.

Replaceable Wear Components

The impeller, stator or cover plate, froth scraper and other wear components can be inspected and replaced individually. Material selection should be matched to ore abrasiveness and slurry chemistry.

Flexible Cell Sizes

Cell volumes from 0.37 to 20 m³ allow the flotation bank to be configured according to slurry flow, required residence time and flotation duty.

Working Principle

Conditioned mineral slurry enters the SF flotation cell and is circulated by the rotating impeller. The impeller creates a low-pressure region that draws air into the rotor-stator assembly, where the air is dispersed into bubbles and mixed with the slurry. Hydrophobic mineral particles attach to the bubbles and rise to the surface, forming a mineralized froth layer that is removed by the scraper mechanism. Hydrophilic and uncollected particles remain in the slurry and flow to the next cell or discharge as tailings. Flotation performance is affected by mineral liberation, reagent chemistry, slurry solids concentration, air intake, impeller condition, froth depth and residence time.

Technical Parameters

Model	Effective volume (m³)	Capacity (m³/min)	Diameter of impeller (mm)	Impeller revolutions (r/min)	Stir motor power (kW)	Scraper motor power (kW)	Single slot weight (kg)
SF-0.37	0.37	0.2-0.4	300	352-442	1.5	0.55	468
SF-0.7	0.7	0.3-1.0	350	336-384	3	1.1	629
SF-1.2	1.2	0.6-1.6	450	312	5.5	1.1	1373
SF-2	2	1.5-3	550	280	11	1.5	1879
SF-2.8	2.8	1.5-3.5	550	280	11	1.5	1902
SF-4	4	2.0-4	650	235	15	1.5	2582
SF-6	6	3-6	760	191	30	2.2	3540
SF-8	8	4.0-8	760	191	30	2.2	4129
SF-16	16	5.0-16	850	169-193	45	1.5	7415
SF-20	20	10-12	850	169-193	45	1.5	9828

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Frequently Asked Questions

An SF flotation machine is used for roughing, scavenging and cleaning in froth-flotation circuits. It is commonly applied to sulfide ores and selected non-metallic minerals after grinding, classification and reagent conditioning.

The standard SF design is self-aerating and uses impeller rotation to induce air into the cell. Actual air intake depends on the slurry, impeller condition, installation and operating settings.

There is no universal feed size for every mineral. The target grind is determined by mineral liberation and flotation tests. Particles that are too coarse may detach from bubbles, while ultrafine particles may reduce selectivity through entrainment.

Model selection requires the dry solids throughput, slurry flow rate, solids concentration, ore density, flotation test results, required residence time, number of flotation stages and available installation space.

Recovery and concentrate grade depend on mineral liberation, particle size, reagent scheme, pH, water chemistry, slurry concentration, air dispersion, impeller condition, froth depth and residence time.

Use the clearance specified in the model manual or manufacturing drawing. Do not apply one universal 5–10 mm setting to every SF model. Check the clearance again after replacing the impeller, stator or cover plate.