Flotation process for phosphorus ore of calcium silicon phosphorus rock

Abstract

The invention discloses a flotation process for phosphorus ore of calcium silicon phosphorus rock. The flotation process includes: crushing raw minerals, grinding the crushed raw minerals into suitable fineness by a wet process, adding regulating agent and collecting agent in the grinded raw minerals, performing positive flotation, mixedly performing flotation to obtain phosphorus ore and carbonate mineral with good floatability, removing silicate mineral which is easy to remove and the carbonate mineral, sludge and other minerals which are weak in floatability; subjecting foam products obtained via flotation to reverse flotation with carbonate, adding the regulating agent and carbonate mineral collecting agent to obtain the carbonate mineral via flotation; subjecting flotation cell products to desliming, adding silicate collecting agent, performing reverse silicate flotation, and further removing impurities such as silicon, iron and aluminum. The flotation process can be used for the flotation for middle and high quality phosphorus ore of the calcium silicon phosphorus rock, and in the fine phosphorus ores obtained via the flotation process, grade of P2O5 is higher than 36%, MgO content is less than 0.5%, total content of Fe2O3 and Al2O3 is less than 1.8%, SiO2 content is less than 5.5%, and quality can reach the standard for high-quality ore concentrate. The flotation process for the phosphorus ore of the calcium silicon phosphorus rock is reasonable in design, strong in operability, and fine in quality of obtained product.

Description

technical field [0001] The invention relates to a beneficiation process, in particular to a silicon-calcium phosphorite phosphate ore flotation process. Background technique [0002] Phosphorus mineral is an important chemical mineral raw material. With the development of society and economy, the demand for phosphorus mineral is increasing, and with the decrease of high-grade rich ore resources, the demand for high-grade phosphorus concentrate products appears more urgent. Compared with conventional quality phosphorus concentrate, high-grade phosphorus concentrate not only reduces transportation load, improves transportation efficiency, and reduces tons of P 2 o 5 The actual transportation cost, but also can greatly improve the economic benefits of subsequent processing enterprises. For example, manufacturers of wet-process phosphoric acid always hope to improve the grade of phosphate rock in the production process. Phosphate concentrate P 2 o 5 The lower the productio...

AI Technical Summary

Problems solved by technology

The useful minerals of siliceous-calcite phosphate rock phosphate rock are collophosite, and the gangue minerals are carbonate minerals, quartz, chalcedony, aluminosilicate minerals, hematite and limonite, etc. In order to obtain industrial application of phosphate rock phosphate rock, it must first be enriched by beneficiation. The usual enrichment method is flotation, which is divided into positive and negative flotation, reverse flotation, double reverse flotation, etc. Both methods can obtain phosphorous concentrate that meets the conventional quality requirements, that is, the P2O5 grade of the concentrate reaches 30-33%, and the impurity SiO2 content greater than 6%, but to obtain P2O5 grade greater than 36%, SiO2 content less than 5.5 % of high-grade phosphorus concentrates are more difficult

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