Industrial grade phosphoric acid plant

Asia Chemical Engineering Co., Ltd. is one of the most reliable manufacturers and suppliers of Industrial grade phosphoric acid plants in China. Please rest assured to wholesale cost-efficient Industrial grade phosphoric acid plants from our factory. Good service and reasonable price are available.

Product Details

Name: Industrial‑Grade Phosphoric Acid Production Line
Capacity: 5‑1 million tons per year, customizable

Turnkey projects：for overseas projects in Africa, the Middle East and Southeast Asia, supporting downstream MCP/DCP and ammonium phosphate plants are available.

Mainstream Process for Industrial‑Grade Phosphoric Acid Production Line: Wet‑Process Dihydrate Phosphoric Acid

Raw Materials: Phosphate Rock + Concentrated Sulfuric Acid + Process Water
Process Flow:
Phosphate rock crushing and grinding → Slurry preparation → Extraction reaction (decomposition of phosphate rock with sulfuric acid) → Vacuum filtration and separation (obtaining dilute phosphoric acid and by‑product phosphogypsum) → Evaporative concentration of dilute phosphoric acid → Sedimentation for impurity removal → (Optional: solvent extraction purification) → Storage and filling of finished phosphoric acid; By‑product fluosilicic acid is used for fluorine resource recovery, and phosphogypsum is discharged.

List of Main Equipment for Industrial‑Grade Phosphoric Acid Production Line (Dihydrate Wet‑Process)
1) Raw Material Preparation Unit
Phosphate rock crusher, ball mill; slurry tank, slurry transfer pump
Sulfuric acid storage tank, sulfuric acid metering and conveying system
Process water storage tank, flocculant preparation and dosing system

2) Extraction Reaction Unit
Extraction‑reaction tank (rubber‑lined / titanium composite plate, with agitator)
Flash cooler, circulating slurry pump
Tail gas scrubber (for fluorine absorption and fluosilicic acid recovery)

3) Filtration and Separation Unit
Rotary‑table vacuum filter (core equipment)
Vacuum pump, atmospheric condenser
Dilute phosphoric acid tank, acid‑return tank, washing‑liquid storage tanks for each stage
Phosphogypsum slag‑removal and conveying equipment

4) Concentration Unit (to produce 75%/85% industrial‑grade phosphoric acid)
Evaporation and concentration unit (graphite heater, flash chamber, gas‑liquid separator)
Circulating acid pump, condenser, condensate water system
Concentrated phosphoric acid settling tank, impurity slurry discharge system

5) Purification Unit (to produce refined industrial‑grade phosphoric acid, optional configuration)
Solvent extraction system, back‑extraction system, phase separator
Impurity‑removal settling tank, precision filtration equipment

6) Storage and Filling Unit
Concentrated phosphoric acid storage tank (rubber‑lined / titanium material)
Automatic filling system: plastic drum filling, tank truck loading device
Waste gas, fluorine recovery and wastewater treatment systems

7) Automatic Control and Auxiliaries
PLC/DCS full‑automatic control system (interlocks for temperature, liquid level, sulfuric‑acid proportioning and vacuum)
Various corrosion‑resistant centrifugal pumps, valves and instruments

Characteristics of Industrial‑Grade Phosphoric Acid Production Line
1. The dihydrate process is technically mature, and full‑set EPC services are available: process design, equipment manufacturing, installation and commissioning, and personnel training.
2. Crude fertilizer‑grade phosphoric acid is produced without an extraction unit. An additional extraction and purification section yields refined industrial‑grade phosphoric acid of 75%/85% concentration.
3. Downstream extension is feasible: direct connection to MCP/DCP and ammonium phosphate production lines.
4. Equipped with fluorine recovery facilities to produce by‑product fluosilicic acid. Phosphogypsum is generated as a by‑product, which requires stockpiling or comprehensive utilization.

Main Applications
Phosphorus chemical raw materials: production of Monocalcium Phosphate (MCP), Dicalcium Phosphate (DCP), Monoammonium Phosphate (MAP), Diammonium Phosphate (DAP), Sodium Tripolyphosphate, etc.;
Metal surface treatment: phosphating and rust removal for steel;
Raw materials for daily‑use chemicals, water treatment, electroplating and flame retardants;
Further deep‑processing can produce food‑grade and battery‑grade phosphoric acid.

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