Phosphate Production Line and Process Solution

Phosphate Ore Production Line Solution specializes in upgrading low-to-medium grade Phosphorite and Apatite.

Our solution employs advanced "Direct-Reverse Flotation" and "Double Reverse Flotation" technologies. It effectively removes impurities like Dolomite (Magnesium) and Silica, achieving a P₂O₅ concentrate grade of >30% suitable for fertilizer and chemical industries.

Step 1: Crushing & Screening

Goal: Reduce raw ore size for efficient grinding.

• Crushing: Jaw Crusher (Coarse) + Cone Crusher (Fine).
• Screening: Vibrating Screen ensures product size is suitable for the ball mill feed.

Step 2: Grinding & Classification

Goal: Liberate phosphate minerals from gangue.

• Equipment: Ball Mill + Spiral Classifier (or Hydrocyclones).
• Process: Two-stage grinding is often used to achieve fine liberation without over-grinding (which causes slime loss).

Step 3: Flotation Separation (Core Technology)

We select the process based on ore mineralogy:

Step 4: Concentrate Dewatering

• Thickening: High-Efficiency Thickener settles the concentrate.
• Filtration: Filter Press reduces moisture for transport.

Project: Silica-Calcium Colloidal Phosphate Mine

We upgraded the plant from a Mixed Process to a Double Reverse Flotation process.

• Raw Ore Grade: 18.55% P₂O₅.
• Concentrate Grade: Improved to 32.58%.
• Recovery Rate: Increased to 72.18%.
• Cost Savings: Reagent cost reduced by 33%; Energy consumption reduced by 29%.

Q1: What P₂O₅ grade is needed for fertilizer production?

A: Typically, a P₂O₅ grade of 30-32% is required for wet-process phosphoric acid production. Our Double Reverse Flotation process can stably achieve grades >32%.

Q2: How do you handle Magnesium (MgO) impurities?

A: Magnesium mainly comes from Dolomite. We use Reverse Flotation with fatty acid collectors under weakly acid/alkaline conditions to float the Dolomite foam, leaving the Phosphate in the pulp.

Q3: What is "Double Reverse Flotation"?

A: It's an advanced process for difficult ores. First, we perform Reverse Flotation to remove Dolomite (Magnesium). Then, we perform a second Reverse Flotation (often cationic) to remove Silicates. This produces a high-grade concentrate from complex ores.

Get Your Custom Phosphate Plant Design

We customize the solution based on your ore's Silica/Calcium/Magnesium content.
Contact us for a free flowsheet design and quotation.

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