Method for refinement and impurity removal of barite ore and comprehensive recovery of calcium and magnesium

A barite and calcium-magnesium technology, which is applied in the fields of chemical industry and metallurgy, can solve the problems of high waste water treatment cost, uneconomical economy, and barite concentrate grade less than 96%.

Inactive Publication Date: 2017-09-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The beneficiation method is direct flotation of barite raw ore after crushing, spiral chute-shaking table gravity separation, shaking table gravity separation, jigging-shaking table, jigging tailing-flotation and other processes to convert BaSO 4 Separated from other impurities, but the grade of barite concentrate obtained from ore dressing is generally less than 96%
The biggest defect of the conventional acid leaching method is that the utilization rate of acid is low, the utilization of acid is generally less than 80%, the cost of wastewater treatment is high, the pressure of environmental protection is great, and it is not economical.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take 1.5L of 6mol / L hydrochloric acid solution, add -200 mesh barite ore powder according to the solid-to-liquid ratio of 1:1.5g / ml, stir and refine at room temperature for 1h, and filter to obtain the filtrate and filter residue. The filter residue is washed and dried to obtain barite ore powder with a grade of 99.6%, and the resulting filtrate is returned to the barite ore refining process and recycled according to the above process conditions until the pH of the solution rises to 1.2 as the refined liquid for purification. The process of purifying the refined liquid is as follows: first press the BaCl in the solution 2 into BaSO 4 Add CaSO to 1.1 times the theoretical amount 4 , stirred at room temperature for 1.5h, filtered to obtain the barium sulfate filter cake and the liquid after debarium removal; the barium sulfate filter cake was treated with 0.1mol / L BaCl 2 After washing the solution, dry it to obtain a precipitated barium sulfate product with a purity of ...

Embodiment 2

[0047] Take HCl 8mol / L, BaCl 2 16g / L solution 5m 3 According to the solid-liquid ratio of 1:2g / ml, add 0-40mm barite ore crushed product, stir and refine at room temperature for 1h, and filter to obtain filtrate and filter residue. The filter residue is washed and dried to obtain barite ore with a purity of 99.23%. The resulting filtrate is returned to the barite ore refining process and recycled according to the above process conditions until the pH of the solution rises to 1.6 for open-circuit purification. The utilization rate of hydrochloric acid in the process reaches 99%. above. The process of open-circuit purification of refined liquid is as follows: first press the BaCl in the solution 2 into BaSO 4 Add CaSO to 1.2 times the theoretical amount 4 , stirred at room temperature for 1h, filtered to obtain the barium sulfate filter cake and the liquid after debarium removal; the barium sulfate filter cake was subjected to 0.05mol / L BaCl 2 After the solution is stirred...

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Abstract

The invention discloses a method for refinement and impurity removal of barite ore and comprehensive recovery of calcium and magnesium. According to the method, crushed materials of the barite ore are added to a HCl-BaCl2 solution, impurities such as CaSO4, BaCO3, CaCO3, MgCO3, Fe2O3 and the like of the ore are removed through stirring or stirring ball-milling, and refined barite ore and a refined liquid are obtained through filtration. The obtained refined liquid is subjected to step-by-step purification and impurity removal, after barium and magnesium are separated and recovered, HCl is added or HCl gas is introduced for acidification, CaCl2*6HO is separated by crystallization, a calcium chloride product and crystallization mother liquor of the product are obtained through filtration, the obtained crystallization mother liquor is returned to refinement and impurity removal procedures to be used continuously, the effective utilization rate of the HCl reaches the highest value, and resource comprehensive utilization of the impurities such as calcium, magnesium and the like is realized. The method has the advantage that the technology is simple, the method is convenient to operate, the processing cost is low, the refinement effect is good, the grade of the barite ore is greatly increased, is 99.2% or above and is 4% or more higher than that in the prior art, the comprehensive utilization rate is high and the like, and the method is suitable for industrial application.

Description

technical field [0001] The invention belongs to the fields of chemical industry and metallurgy, and in particular relates to a method for refining, removing impurities and comprehensively recovering calcium and magnesium from barite ore. Background technique [0002] Barite is an important mineral raw material of barium, which is mainly used in the production of barium oxide, barium carbonate, barium chloride, barium nitrate, precipitated barium sulfate, barium hydroxide, etc. High-quality barite minerals (including BaSO 4 >97%) can be directly used as filler for paint, paper making, rubber and plastic after grinding, and drilling weighting material. But most of the barite ores in BaSO 4 The grade is <95% except BaSO 4 In addition, it also contains CaSO 4 、BaCO 3 , CaCO 3 , MgCO 3 , Fe 2 o 3 and other impurities. The existence of these impurities seriously affects the production and application of barite mineral derivative products. Therefore, the barite ore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/10C22B3/44C22B26/22C22B26/20
CPCC22B3/10C22B3/44C22B26/20C22B26/22Y02P10/20
Inventor 王学文王明玉陈边防
Owner CENT SOUTH UNIV
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