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Phosphorous is literally at the root of the food industry. An essential ingredient in agriculture, it contributes to plant seed formation and root development. But farmers do not simply give their soil a dose of the chemical element. Instead, phosphorous fertilizer processing equipment blends it with other materials to manufacture effective formulas.

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Reduce chlorine content with freshwater

Phosphate occurs naturally in the phosphate rock, but it is not available to plants in its raw form. Instead, the extracted mineral is ground finely and chemically treated to produce phosphate fertilizer.

Beneficiation is the production process to remove impurities from the ore. Besides undesired metals or clay, the rock may contain substantial chlorine traces that lead to corrosion further down the production line. Wash the raw material with freshwater to minimize its chlorine content before processing.

Manufacture high-quality phosphate fertilizer by calcinating ore

The dry fertilizer production technique subjects the pre-processed phosphate material to high heat. Treat the ore with silica in a furnace, then distill the remaining elemental phosphorus and dissolve it in water to obtain white acid.

This type of phosphoric acid produces a high-purity compound suitable for food-grade applications, including toothpaste and detergents.

Phosphorus fertilizer processing equipment to make green acid

Despite its content purity, producing white acid is energy-intensive. An alternative method is to react the phosphate feed with a chemical to generate green acid.

Treat the ore with sulfuric acid in a reaction tank to trigger the formation of phosphoric acid. The wet process develops gypsum as a by-product that a filtration system discards. Purify the remaining material with steam, but remove moisture content with an evaporator before sending it to the formulation blender machine.

Blend phosphoric acid with ammonium to enhance its nutrient properties

Phosphoric acid produced by either the dry or wet methods is reheated to raise the substance concentration. This superphosphoric acid has a phosphate content between 72% and 76%.

But soils are not treated with pure phosphate fertilizers. Superphosphoric acid is blended with ammonium to increase availability and improve the physical attributes of the final product. To manufacture solid granular fertilizers, mix the dry ingredients in a granulator.

Processing steps involved in phosphorus-fertilizer making

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