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A method for reducing impurities of uranium, thorium, titanium, iron and aluminum in zircon sand

A zircon sand and impurity technology, applied in the direction of non-metallic elements, etc., can solve the problems that titanium cannot be leached and the leaching effect is not good, and achieve the effect of simple process

Active Publication Date: 2017-10-27
阿斯创钛业(营口)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical method mainly uses hydrochloric acid and sulfuric acid for leaching at room temperature, and the leaching effect is not good. Among them, the leaching rate of uranium is less than 10%, that of thorium is less than 30%, and titanium cannot be leached basically.

Method used

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  • A method for reducing impurities of uranium, thorium, titanium, iron and aluminum in zircon sand

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Effect test

Embodiment 1

[0025] A method for reducing impurities of uranium, thorium, titanium, iron and aluminum in zircon sand, comprising the steps of:

[0026] The particle size is 80-140 mesh accounting for 0.44%, 140-160 mesh accounting for 0.69%, 160-200 mesh accounting for 2.57%, ≤200 mesh accounting for 96.2% zircon sand and 70% sulfuric acid according to the mass ratio of 1:0.6 After mixing, send it to the leaching and evaporator for leaching and evaporation. The leaching temperature is 300 degrees Celsius, the leaching time is 2 hours, the evaporation temperature is less than 500 degrees Celsius, and the evaporation time is 30 minutes. Free sulfuric acid in the solid zircon sand after evaporation Less than 0.5%, the solid zircon sand is stirred and immersed in water at 100 degrees Celsius, and the solid zircon sand after water immersion is washed with water 5 times the mass of the zircon sand until neutral, and dried at 105 degrees Celsius to obtain the product.

Embodiment 2

[0028] A method for reducing uranium, thorium, titanium, iron and aluminum impurities in zircon sand, which is to mix zircon sand with ≤200 mesh accounting for 96.2% and 70% sulfuric acid at a mass ratio of 1:0.6, and then send it to a leaching and evaporating device The leaching temperature is 280 degrees Celsius, the leaching time is 1.8 hours, the evaporation temperature is less than 500 degrees Celsius, and the evaporation time is 30 minutes. The free sulfuric acid in the solid zircon sand after evaporation is less than 0.5%, and the solid zircon sand is in Stirring and water immersion are carried out at 80 degrees centigrade, the solid zircon sand after water immersion is washed with water three times the mass of the zircon sand until neutral, and dried at 105 degrees centigrade.

Embodiment 3

[0030] A method for reducing uranium, thorium, titanium, iron and aluminum impurities in zircon sand, which is to mix zircon sand with ≤200 mesh accounting for 96.2% and 70% sulfuric acid at a mass ratio of 1:0.6, and then send it to a leaching and evaporating device leaching to dryness, leaching temperature is 260°C, leaching time is 1.5 hours, evaporation temperature is less than 500°C, evaporation time is 30 minutes, free sulfuric acid in solid zircon sand after evaporation is less than 0.5%, and solid zircon sand is in Stirring and water immersion at 85°C, washing the solid zircon sand with water 4.5 times the mass of the zircon sand until neutral, and drying at 105°C.

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Abstract

A method for reducing impurities of uranium, thorium and titanium in zircon sand. The zircon sand with a particle size of ≤200 mesh and accounting for 96‑96.2% is fully charged by adding 70% sulfuric acid at a mass ratio of zircon sand to 70% sulfuric acid of 1:0.6. After mixing, send it to the leaching and evaporating device, the leaching temperature is 200-300 degrees Celsius, the leaching time is 1-2 hours, the evaporation temperature is less than 500 degrees Celsius, and the evaporation time is 30 minutes, free sulfuric acid in the solid zircon sand after evaporation Less than 0.5%, the solid zircon sand is stirred and immersed in water at 80-100 degrees Celsius, and the solid zircon sand after water immersion is washed to neutral according to the water volume of 3-5 times the quality of the zircon sand, and dried at 105 degrees Celsius. Instantly. The invention can increase the total leaching rate of uranium and thorium to 50-70%, reduce the total amount of uranium and thorium in the zircon sand to less than 500ppm, and reduce the titanium oxide to less than 0.2%. In this way, the highly radioactive and high-titanium zircon sand can reach the standard of high-grade products.

Description

technical field [0001] The invention belongs to the field of hydrometallurgical mineral treatment, in particular to a method for reducing impurities of uranium, thorium, titanium, iron and aluminum in zircon sand. Background technique [0002] At present, the treatment methods for uranium, thorium, titanium, iron and aluminum impurities in zircon sand with a particle size of <200 mesh and 96.2% of high-uranium thorium titanium include physical methods and chemical methods. The physical method is a solid mixing and dilution method, which does not fundamentally reduce the impurities of uranium, thorium, titanium, iron and aluminum in the original material. The chemical method mainly uses hydrochloric acid and sulfuric acid for leaching at room temperature, and the leaching effect is not good. Among them, the leaching rate of uranium is less than 10%, that of thorium is less than 30%, and titanium cannot be leached basically. Contents of the invention [0003] The purpose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/20
Inventor 亚历山大·布朗康蓉白生红周奎简平
Owner 阿斯创钛业(营口)有限公司
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