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Preparation process for improving whiteness of kaolin

A preparation process and technology of kaolin, applied in inorganic chemistry, non-metallic elements, silicon compounds, etc., can solve the problem that the whiteness of kaolin cannot be further improved, and achieve the effect of improving whiteness

Inactive Publication Date: 2019-11-05
福建新汉唐非金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the whiteness of the kaolin prepared by the above bleaching method has been improved, the highest whiteness is still at about 87%, and the whiteness of the kaolin cannot be further improved.

Method used

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  • Preparation process for improving whiteness of kaolin
  • Preparation process for improving whiteness of kaolin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: a kind of preparation technology that improves kaolin whiteness comprises the steps:

[0046] Step 1: Mining to remove impurities, mining kaolin mineral materials in Zhangzhou City, and initially separating clay and impurities to obtain base materials;

[0047] Step 2: pulping and desanding, pulping the base material and desanding to obtain the primary pulp material;

[0048] Step 3: Pass the primary slurry material into the No. 1 reaction pool, pass hydrochloric acid into the primary slurry material, adjust the pH of the primary slurry material to 1, and obtain dissolved iron ore slurry;

[0049] Step 4: Introduce hydrogen peroxide with a mass fraction of 35% into the dissolved iron ore slurry in step 2. The weight ratio of hydrogen peroxide to base material is 1:30 to obtain iron ion slurry, and pass the iron ion slurry into No. 2 reaction pool ; Wherein, the base material in this step is the base material described in step one.

[0050] Step 5: Introd...

Embodiment 2

[0053] Example 2: The difference from Example 1 is that the pH of the initial slurry in step three is 2; the weight ratio of hydrogen peroxide to base material in step four is 1:40; the anhydrous hydrofluoric acid and base material in step five The weight ratio of materials is 1:25; the weight ratio of sulfur tetrafluoride solution and anhydrous hydrofluoric acid in step 6 is 1:1.5; the weight ratio of sodium chloride solution and base material in step 7 is 1:40.

Embodiment 3

[0054] Example 3: The difference from Example 1 is that hypochlorous acid is introduced into the primary slurry while hydrochloric acid is introduced in step 3, and the weight ratio of hypochlorous acid to hydrochloric acid is 2:1.

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Abstract

The invention discloses a preparation process for improving the whiteness of kaolin, and relates to the field of removing iron from ore. The preparation process for improving the whiteness of kaolin is characterized by comprising the following steps that 1, mining and impurity removing are conducted, wherein kaolin ore is excavated, clay and impurities are initially separated out, and a base material is obtained; 2, pulping and sand removing are conducted, wherein the base material is subjected to pulping and sand removing, and an ore pulp initial material is obtained; 3, hydrochloric acid isintroduced into the ore pulp initial material, and dissolved iron ore pulp is obtained; 4, hydrogen peroxide is introduced into the dissolved iron ore pulp, and iron ion ore pulp is obtained; 5, anhydrous hydrofluoric acid is introduced into the iron ion ore pulp, and iron fluoride ore pulp is obtained; 6, a sulfur tetrafluoride solution is introduced into the iron fluoride ore pulp, and iron hexafluoride ion ore pulp is obtained; 7, a sodium chloride solution is introduced into the iron hexafluoride ion ore pulp, and after uniform mixing, the mixture is introduced into a filter press for pressure filtration. The preparation process has the advantages of improving the whiteness of the kaolin and expanding the application field of the kaolin.

Description

technical field [0001] The invention relates to the field of iron removal from ore soil, more specifically, it relates to a preparation process for improving the whiteness of kaolin. Background technique [0002] Kaolin is a non-metallic mineral, a kind of clay and clay rock mainly composed of kaolinite clay minerals, and now it has become necessary for dozens of industries such as papermaking, ceramics, rubber, chemicals, coatings, medicine and national defense. Mineral raw materials. [0003] The quality of kaolin is generally evaluated by parameters such as whiteness, particle size, and plasticity. The whiteness is used as the main judgment parameter: generally, the more thoroughly the kaolin is bleached, the less iron content in the kaolin slurry, and the higher the whiteness of the kaolin due to the less colored iron oxide or ferrous oxide. The field is also wider. [0004] A Chinese invention patent with the notification number CN101798096B discloses a kaolin prepar...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 李荣森陈福亮黄少聪
Owner 福建新汉唐非金属材料有限公司
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