Reprocessing method of phosphate ore flotation tailings and phosphate ore flotation method

A technology for flotation tailings and reprocessing, applied in flotation, solid separation, magnesium chloride, etc., can solve the problem of low utilization rate of phosphate ore flotation tailings resources, improve resource utilization rate, and solve the problem of land occupation Effect

Inactive Publication Date: 2019-02-01
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose a reprocessing method of phosphate rock flota...

Method used

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  • Reprocessing method of phosphate ore flotation tailings and phosphate ore flotation method
  • Reprocessing method of phosphate ore flotation tailings and phosphate ore flotation method
  • Reprocessing method of phosphate ore flotation tailings and phosphate ore flotation method

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Experimental program
Comparison scheme
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Embodiment 1

[0039] combine figure 1 Shown, a kind of reprocessing method of phosphate rock flotation tailings, comprises the following steps:

[0040] 1) adding hydrochloric acid to the slurry of phosphate ore flotation tailings, reacting, filtering to obtain silicon slag and acid solution;

[0041] 2) cooling and filtering the acid solution to obtain calcium chlorophosphate and phosphorus analysis mother liquor;

[0042] 3) heating the phosphorus-analyzing mother liquor, stirring and adding sulfuric acid, reacting, and filtering to obtain gypsum whiskers and calcium-analyzing mother liquor;

[0043] 4) concentrating the calcium analysis mother liquor to obtain dilute hydrochloric acid and magnesium chloride mother liquor;

[0044] 5) the magnesium chloride mother liquor is cooled, filters to obtain MgCl 2 ·6H 2 O and magnesium analysis mother liquor.

[0045] The reprocessing method of phosphate rock flotation tailings in this embodiment firstly acidifies the phosphate rock flotatio...

Embodiment 2

[0054] The collophanite of Hubei Ezhong Ecological Engineering Co., Ltd. was used as the raw ore, and the chemical composition of the main elements of the collophanite is shown in Table 1.

[0055] Table 1 (%)

[0056]

[0057] combine figure 1 As shown, adopt the reprocessing method of the phosphate rock flotation tailings of embodiment 1 to reprocess the tailings slurry that this collophosite flotation process produces, specifically comprise the following steps:

[0058] 1) Use a rod mill to dissociate 166 kg of the above-mentioned collianophosphate ore to make a pulp with a concentration of 30%, add the calcium chloride phosphate product in step 5) to the pulp, and add sulfuric acid to the pulp to adjust the pH When the value reaches 4-5, stir for 2 minutes, then add phosphoric acid inhibitor according to the amount of 5kg / t raw ore, stir for 2 minutes, then add hydroxysulfostearate saponin phosphate rock collector according to the amount of 1.2kg / t raw ore , aeration,...

Embodiment 3

[0075] The collophanite of Hubei Ezhong Ecological Engineering Co., Ltd. was used as the raw ore, and the chemical composition of the main elements of the collophanite is shown in Table 1.

[0076] combine figure 1 As shown, adopt the reprocessing method of the phosphate rock flotation tailings of embodiment 1 to reprocess the tailings slurry that this collophosite flotation process produces, specifically comprise the following steps:

[0077] 1) Use a rod mill to dissociate 166 kg of the above-mentioned collianophosphate ore to make a pulp with a concentration of 30%, add the calcium chloride phosphate product in step 5) to the pulp, and add sulfuric acid to the pulp to adjust the pH When the value reaches 4~5, stir for 2 minutes, then add phosphoric acid inhibitor according to the amount of 5kg / t raw ore, stir for 2 minutes, then add hydroxysulfostearate saponin phosphate rock collector according to the amount of 1.3kg / t raw ore , aeration, and reverse flotation to obtain c...

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Abstract

The invention provides a reprocessing method of phosphate ore flotation tailings and a phosphate ore flotation method. The reprocessing method comprises the following steps that firstly, acidolysis onthe phosphate ore flotation tailings is conducted, then floating coupling, precipitation and filtering are conducted for several times to separate silicon, phosphorus, Ca<2+> and Mg<2+> in the phosphate ore flotation tailings in the form of silicon slag, calcium chloride calcium phosphate, gypsum whisker and MgCl2.6H2O from each other. According to the reprocessing method, separated outcomes canbe used for producing industrial products, no waste residue is generated in the whole process, reutilization of the phosphate ore flotation tailings is realized, the resource utilization rate of the phosphate ore flotation tailings is improved, therefore the problems that the phosphorus tailings occupy land resources and pollute environment are solved, and the method has good economic benefits andimportant environmental protection significance.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for reprocessing phosphate rock flotation tailings and a phosphate rock flotation method. Background technique [0002] Phosphate rock is a strategic resource widely used in various fields of the national economy. my country's phosphate rock is "abundant but not rich", and the average grade is only about 17% to 18%. At this stage, reverse flotation is generally used to remove magnesium, but at the same time, a large amount of flotation tailings are produced. According to statistics, for 23% P 2 o 5 About phosphate ore, every ton of phosphorus concentrate will produce about 0.30 tons of tailings, for 18%P 2 o 5 For every ton of phosphorous concentrate produced, about 0.50 tons of tailings will be produced. At present, most of the phosphorous tailings are piled up in tailings ponds, which not only occupy a large area of ​​land and lose a lot of useful compo...

Claims

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Application Information

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IPC IPC(8): B03D1/00C01F5/30
CPCB03D1/00C01F5/30
Inventor 潘志权陈佳伟张华丽程清蓉周红
Owner WUHAN INSTITUTE OF TECHNOLOGY
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