A process of mechanical activation to improve boron leaching rate of boron concentrate

A mechanical activation, boron concentrate technology, applied in inorganic chemistry, boron compounds, chemical instruments and methods, etc., can solve the problems of equipment, energy and resource waste, generation of greenhouse gases, and methods for enhancing the boron leaching process that have not yet been reported, To achieve the effect of reducing the dependence of temperature and solution concentration, increasing the specific surface area, reducing the apparent activation energy and reaction order
CN106492940BActive Publication Date: 2018-06-26NORTHEASTERN 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
2018-06-26

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Abstract

The invention belongs to the field of boron ore resource utilization, and particularly relates to a mechanical activation process for improving the boron leaching rate of boron concentrate. In the present invention, the boron concentrate is first mechanically crushed and used as raw material for later use. The crushed boron concentrate raw material is placed in a high-energy ball mill for mechanical activation. The mass ratio of the grinding ball to the boron concentrate raw material is (4~16):1. The diameter of the grinding ball is 3~10mm, the filling rate of the grinding ball and boron concentrate in the ball mill tank is 30%~70%, the ball milling speed is 100~300r / min, the ball milling time is 10~120min, and the mechanically activated boron concentrate is obtained , and finally stir and heat the mechanically activated boron concentrate with sodium hydroxide solution to obtain boron-containing leach liquid and leaching residue. The boron leaching rate reaches more than 73.1%. The present invention applies the method of combining mechanical activation and alkali leaching to strengthen the leaching of boron in boron concentrate, which is a simple, safe, economical, environmentally friendly and efficient new process. This new process can improve the activity of boron concentrate, Therefore, it is expected to obtain higher boron leaching rate at lower alkalinity and temperature.
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Description

technical field

[0001] The invention belongs to the field of utilization of boron ore resources, and in particular relates to a process for improving the boron leaching rate of boron concentrate through mechanical activation. Background technique

[0002] Although my country is rich in boron resources, the recoverable boronite ore reserves in the existing boron mines are limited and will soon be exhausted. The output is far from meeting the needs of the boron industry, and the contradiction between supply and demand is very prominent. The use of low-grade boron ore resources has become an inevitable trend, but low-grade boron ore cannot meet the requirements of industrial production. Boron iron ore is separated by magnetic gravity separation to separate boron-containing iron concentrate and boron concentrate. The boron content in boron concentrate is relatively high, but the grade is still low. The leaching rate is only about 65%, the efficiency is too low, and the mineral ...

Claims

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