Gypsum powder fertilizer production line – granulation effect experiment

Gymsum Powder Granuletion Testing Report

Experimental purpose: To explore the best granulation conditions and methods by studying the granulation process of gypsum powder, and to provide reference for the production of gypsum fertilizer.

Raw material: Calcined Gypsum powder

Raw material Moisture：2-3%

Raw material form: powder

Raw material Powder Mesh：80-100m

Experiment 1: Using Disc Granulator

1. Prepare and weigh ingredients according to recipe

Calcined Gypsum powder: 20kg

2. Add water — add water 12.8% (2.95kg)

Water prepare：2.95kg

Mixing process：0.8kg

Remaining water:  1.15kg

3. Disc Granulator –video and finished granules

Finished pellet weight: 9.45kg（Select a portion）

Finished particle shape: spherical
Finished pellet Include: 6mm=1.95kg （accounted for 20.6%）

5mm=1.60kg（accounted for 16.9%）

4mm=3.50kg（accounted for 37%）

3mm=1.80kg（accounted for 19%）

2mm=0.60kg（accounted for 6%）

4. Experimental data：

Raw material: Calcined Gypsum powder 20kg

Added water: 2.95kg (Adding 0.8kg during the mixing process, adding 0.8 during granulation process)

Finished pellet weight: 9.45kg (Select a portion)

Ball rate: 99.5%

Date:2023/11/20

Experiment 2: Using Stirring Pin Granula

1. Prepare and weigh ingredients according to recipe

Calcined Gypsum powder: 73.6kg

2.Add water–add water 10.2% (8.4kg)

Water prepare：16.6kg

Mixing process：8.4kg

Remaining water:8.2kg

3. Stirring Pin granulator –experiment procedure 

Finished pellet weight: 20.6kg（Select a portion）

Finished particle shape: spherical

Finished pellet Include: 6mm=2.10kg （accounted for 10.1%）

5mm=3.30kg（accounted for 16%）

4mm=5.50kg（accounted for 26.6%）

3mm=4.31kg（accounted for 20.9%） 2mm=2.3kg（accounted for 11.1%）

4.Experimental data：

Raw material: Calcined Gypsum powder 73.6kg

Added water: 8.4kg (Just adding 8.4kg during the mixing process)

Finished pellet weight:20.6kg (Select a portion)

Ball rate: 85%

Experiment 3: Using Double Roller Granulator

1.Prepare and weigh ingredients according to recipe

Calcined Gypsum powder: 13.25kg

2. Double Roller Granulator — experiment procedure

The experiment failed due to the strong viscosity of the raw materials.

The raw material adheres to the equipment roller skin and is difficult to form.