A kind of method that uses chelation inhibitor PBTCA to carry out phosphate rock flotation to remove magnesium

A phosphate rock and inhibitor technology, which is applied in the field of phosphate rock positive flotation and magnesium flotation, can solve the problem of high MgO content in phosphate rock concentrate, which restricts the development and utilization of phosphate rock resources, Exacerbating the excessive consumption of phosphating chemical acid and other problems, achieving the effect of simple process method, reduced equipment corrosion maintenance, and low cost
CN111036410BInactive Publication Date: 2021-03-23NORTHEASTERN UNIV LIAONING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEASTERN UNIV LIAONING
Publication Date
2021-03-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method of flotation demagnesization of phosphate rock using chelating inhibitor PBTCA, which belongs to the field of flotation separation of salt minerals. This method uses water to adjust the slurry and pH value, and then adds the chelating inhibitor PBTCA (2-phosphonobutane-1,2,4-tricarboxylic acid) to perform positive flotation and remove magnesium, and the obtained flotation product is dried dry to obtain low magnesium phosphate concentrate, whose P 2 O 5 The recovery rate is 77.54% to 84.31% by weight, and the removal rate of MgO in the low magnesium phosphate concentrate is 74.06% to 83.08% by weight. This method selectively inhibits dolomite flotation by adding the chelating inhibitor PBTCA, expands the difference in flotation performance between apatite and dolomite, and uses positive flotation method to achieve effective separation of apatite and dolomite. In addition, the chelating inhibitor PBTCA is biodegradable, non-toxic, highly selective, low-cost, and easy to obtain commercially, and can achieve the goal of flotation demagnesization of high-magnesium and low-grade phosphate ores.
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Description

technical field

[0001] The invention relates to a method for demagnesizing phosphate rock by positive flotation, in particular to a method for demagnesizing phosphate rock by flotation using a chelating inhibitor PBTCA, and belongs to the technical field of flotation and separation of salt minerals. Background technique

[0002] Phosphorus is one of the most common elements on earth and a fundamental building block of living organisms. At present, the acquisition of phosphorus mainly comes from the development and utilization of phosphate rock. As the main raw material of phosphorus industry, phosphate rock is widely used in agriculture, food, medicine and chemical industry. With the development of modern agriculture, the large consumption of phosphate fertilizers has led to an increase in the demand for high-quality phosphate rock, and the number of high-quality phosphate rock has decreased sharply. Therefore, the development of low-grade phosphate rock resources is an imp...

Claims

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