Method for impurity removal and whitening of potassium feldspar

A technology for potassium feldspar and purpose, applied in the field of impurity removal and whitening of potassium feldspar, can solve the problems of waste of resources, difficult removal of impurities, high energy consumption, etc., to reduce the generation of waste acid, facilitate industrial production, and reduce environmental pollution Effect

Inactive Publication Date: 2016-09-07
洛南县大秦钾矿有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnetic separation has a good iron removal effect, and the iron content can be reduced to 0.24%, but other impurities are difficult to remove and cannot achieve the whitening effect; the process is simple and easy to process, but there are high processing costs, large energy consumption, Disadvantages such as low profit, low efficiency, and serious air pollution
Flotation has a good impurity removal effect, and the iron content can be reduced to less than 0.2%, but the whiteness cannot be raised to more than 80; the process requires the addition of chemical substances, resulting in high production costs, seriou

Method used

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  • Method for impurity removal and whitening of potassium feldspar
  • Method for impurity removal and whitening of potassium feldspar
  • Method for impurity removal and whitening of potassium feldspar

Examples

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Embodiment 1

[0023] In this embodiment, the process of purifying potassium feldspar ore with high iron content by hydrothermal pickling is used as an example to illustrate the process of the present invention.

[0024] The potassium feldspar raw ore is first crushed into potassium feldspar particles with a particle size of less than 6mm by a crusher, and then the sieved potassium feldspar particles are ball-milled to obtain 60-200 mesh sand powder, which is sent into a spiral chute for separation and separation. The sediment is extracted to obtain potassium feldspar fine powder, and finally the potassium feldspar fine powder is subjected to hydrothermal pickling to obtain impurity-removed and whitened potassium feldspar. The specific process of hydrothermal pickling is: hydrothermally react potassium feldspar fine powder with 10% sulfuric acid at 200° C. for 8 hours at a mass ratio of 1:2.

[0025] see figure 1 , it can be seen that the treated potassium feldspar grains are sharp and comp...

Embodiment 2

[0028] The potassium feldspar raw ore is first crushed into potassium feldspar particles with a particle size of less than 6mm by a crusher, and then the sieved potassium feldspar particles are ball-milled to obtain 60-200 mesh sand powder, which is sent into a spiral chute for separation and separation. The sediment is extracted to obtain potassium feldspar fine powder, and finally the potassium feldspar fine powder is subjected to hydrothermal pickling to obtain impurity-removed and whitened potassium feldspar. The specific process of hydrothermal pickling is as follows: the potassium feldspar fine powder and sulfuric acid with a mass fraction of 20% are hydrothermally reacted at 180° C. for 6 hours at a mass ratio of 1:2.

[0029] see image 3 , it can be seen that the treated potassium feldspar grains are sharp and complete.

[0030] see Figure 4 , in the purified potassium feldspar powder after testing: the mass percentage of potassium element is 8.11%, the mass percen...

Embodiment 3

[0032] The potassium feldspar raw ore is first crushed into potassium feldspar particles with a particle size of less than 6mm by a crusher, and then sent to a drum sieve to sieve to remove impurities such as mica and wood, and then the sieved potassium feldspar particles are ball milled to obtain 60-200 The target sand powder is sent to the spiral chute for separation and sorting, and the sediment is selected to obtain potassium feldspar fine powder. Finally, the potassium feldspar fine powder is subjected to hydrothermal pickling to obtain impurity-removed and whitened potassium feldspar. The specific process of hydrothermal pickling is as follows: the potassium feldspar fine powder and sulfuric acid with a mass fraction of 30% are hydrothermally reacted at 150° C. for 5 hours at a mass ratio of 1:2.

[0033] see Figure 5 , it can be seen that the treated potassium feldspar grains are sharp and complete.

[0034] see Image 6 , in the purified potassium feldspar powder af...

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Abstract

The invention discloses a method for impurity removal and whitening of potassium feldspar. Firstly, the potassium feldspar is crushed to particles; then, a ball mill is adopted to grind the potassium feldspar particles to sand powder; the sand powder is magnetically separated by a multi-stage strong magnetic separator after screening; and finally, the hydrothermal acid washing is performed for the magnetically separated potassium feldspar sand powder by sulfuric acid to obtain high-grade and high-whiteness potassium feldspar sand powder. An acid washing purification process is in a closed environment without generating a dust flying problem; the purified potassium feldspar sand powder not only can satisfy the requirements on high-whiteness potassium feldspar sand powder in such industries as glass and ceramics, but also can improve the utilization efficiency of sulfuric acid to a greater extent so as to reduce generation of waste acid; and the method is a green and environment-friendly purifying and whitening production process.

Description

technical field [0001] The invention relates to a beneficiation process, in particular to a method for removing impurities and whitening potassium feldspar. Background technique [0002] Potassium feldspar is an important industrial raw material with a wide range of uses, mainly used in ceramics, glass, enamel and other industries. However, natural potassium feldspar ores usually contain mica, tourmaline, quartz, weakly magnetic iron minerals, and dark-colored minerals such as chlorite and cornstone. Some weathered ores also contain kaolin. These impurities are complex, making potassium feldspar The application in many industrial fields is limited, so it is necessary to select useful minerals by means of physical and chemical treatment, remove impurity components, and reduce the content of harmful elements to achieve the technical indicators of industrial utilization. In industrial applications, there are certain restrictions on the iron content of feldspar raw materials. T...

Claims

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Application Information

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IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 陈安林杨海波王英陈仕英
Owner 洛南县大秦钾矿有限公司
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