what is a Stirring tank？

what is a Stirring tank？

Stirring tank: a vertical tank equipment with a stirring impeller, used for solid-liquid slurry mixing, chemical dissolution, suspension, leaching, slurry adjustment, and widely used in mineral processing, organic fertilizer, chemical, and wastewater industries.

Working principle of mixing tank

The motor and reducer drive the impeller to rotate, forming an up and down circulation flow, allowing solid particles to suspend without settling, ensuring thorough mixing of slurry and chemicals, and prolonging the reaction time; The model with a central circulation tube has a stronger circulation effect.

Basic structure of mixing tank

1. Tank body: Carbon steel (lined with rubber/anti-corrosion), stainless steel PP， Flat bottom/cone bottom;
2. Drive: motor, reducer, transmission (belt/direct connection);
3. Stirring impellers: propeller type (most commonly used in mineral processing), turbine, propeller type, anchor type;
4. Central circulation cylinder (only available for RJ type, not available for RJW), baffle, feed inlet, overflow outlet, and drain outlet.

Four common categories of stirred tank beneficiation

1. Pulp agitation tank (RJ): top note pulp, pulp+reagent mixing, with circulating cylinder;
2. Drug mixing tank (RJW): for dispensing and dissolving drugs, without a circulation cylinder;
3. Mixing storage tank: Long term storage of slurry to prevent sedimentation;
4. Lifting the mixing tank: mixing+slurry lifting, lifting height ≤ 1.2m, used when the self flow height difference is insufficient.

Suitable industries for mixing tanks (focus on fertilizer equipment)

Mining: flotation, leaching, cyanide extraction of gold;
Organic fertilizer/water-soluble fertilizer: liquid fertilizer slurry adjustment, bacterial agent mixing, fermentation slurry adjustment;
Chemical industry, wastewater treatment, wet metallurgy;
Suitable for slurry concentration generally ≤ 40% and particle size ＜ 1mm.

Selection reference for impeller of mixing tank

Propeller (propulsion type): low viscosity, large circulation, mineral slurry, fertilizer slurry (mainstream)
Vortex type: high shear, gas dispersion
Anchor/frame type: high viscosity, anti stick wall

Key points for selecting mixing tanks

1. Effective volume (m ³);
2. Material: ordinary carbon steel, rubber lining, 304/316 stainless steel, PP anti-corrosion;
3. Is it equipped with a circulation cylinder;
4. Slurry concentration, acidity and alkalinity, temperature;
5. Do you need to heat the jacket, liquid level, and dosing port.