The beneficiation method for producing phosphate concentrate powder from low-grade phosphate rock

Abstract

The invention provides a beneficiation method for producing phosphate concentrate powder by using low-grade phosphate rock. 1. Crushing the phosphate rock to less than 20mm; 2. Sending the crushed phosphate rock into the storage bin of the rotary kiln head , sent to the rotary kiln through the feeding pipe of the storage bin for a return calcination, the calcination temperature is 1200-1300 ℃; 3. After the calcined phosphate rock is quenched by the kiln tail water pool, it is transported into the ball mill and ground into 200 mesh Slurry; 4. Send the slurry into the roughing tank, add 1% to 1.1% mixed acid inhibitor and 0.16 to 0.21% auxiliary collector during the stirring process of the mixer, and the sediment below is the phosphorous concentrate pink. The present invention makes full use of low-grade phosphate rock through the above-mentioned scientific and simple flotation method to obtain high-grade high-quality phosphate concentrate powder, which can meet the processing requirements of electrothermal phosphorus production and wet process phosphoric acid, and has the advantages of fully utilizing resources and reducing comprehensive characteristics of cost.

Description

technical field [0001] The invention relates to an ore dressing method for phosphate rock, in particular to a beneficiation method for producing phosphate concentrate powder by using low-grade phosphate rock. Background technique [0002] Phosphate rock is an important chemical mineral raw material. It has been used in industry for more than 100 years. With the development of economy and the wide application of phosphate rock products, phosphate rock resources are becoming less and less, especially the existing phosphorus production technology The production process of wet-process phosphoric acid has strict requirements on the grade and quality of phosphate rock, resulting in the excessive consumption of high-grade phosphate rock resources in my country, while many low-grade phosphate rock resources cannot be used for beneficiation because they are colloidal phosphate rock. The in vain loss is abandoned. Since natural resources are non-renewable, the country's phosphate rock r...

AI Technical Summary

Problems solved by technology

[0002] Phosphate rock is an important chemical mineral raw material. It has been used in industry for more than 100 years. With the development of economy and the wide application of phosphate rock products, phosphate rock resources are becoming less and less, especially the existing phosphorus production technology The production process of wet-process phosphoric acid has strict requirements on the grade and quality of phosphate rock, resulting in the excessive consumption of high-grade phosphate rock r...