Iron removal method of ball clay for electric ceramic industry

A ball clay and industry technology, applied in the field of iron removal production technology, can solve the problems of few reports on the application and development of ball clay.

Inactive Publication Date: 2012-06-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ball clay is only found in a few areas, such as Jilin Mandshurica Fraxinus, Guangxi Nanning, etc., there are few reports on the application and development of ball clay

Method used

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  • Iron removal method of ball clay for electric ceramic industry
  • Iron removal method of ball clay for electric ceramic industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. The raw material is the ash ball clay from Jilin Province. The natural whiteness of ash ball clay after washing is 46.89%, Fe 2 o 3 The content is 2.54%, Al 2 o 3 The content is 25.35%; the main mineral composition is kaolinite and quartz, and the clay minerals of the original soil mainly exist in irregular layers.

[0037] 2. Slurry the raw ore of Fraxinus ash ball clay with a high-speed mixer to make a slurry with a concentration of 12.5%. Then, the hydrocyclone sorts to remove the coarse-grained sand, and the pulp containing fine sand enters the spiral classifier; the pulp after the spiral classifier is transported to 3 sorting pools for sorting cycle operation, from the sorting The slurry from the pool enters the thickening pool.

[0038] 3. Add the ore pulp in the thickening tank to the iron removal tank, add water and stir to adjust the concentration of the ore pulp to 12%. Add concentrated sulfuric acid to adjust the pH value of the pulp to 3, add 4% sod...

Embodiment 2

[0041] Raw materials and iron removal production process are the same as in Example 1. The concentration of the separation pulp is 12%, and the concentration of the pulp in the iron removal pool is 15%. Add concentrated sulfuric acid to adjust the pH value of the pulp to 2.5, add 5% sodium dithionite, react for 50 minutes, add 1.5% oxalic acid, and react for 18 minutes. The amount of polyacrylamide added is 0.45‰, the reaction time is 25 minutes, and the pulp is washed 5 times until the pH value of the slurry is 7. The pulp is crushed to 2000 mesh by ultra-fine flakes. Fe was detected by chemical analysis 2 o 3 The content is 1.65%. The volume resistivity of fired electric porcelain is 2.4×10 at room temperature 12 Ω·m, the dielectric constant of 1MHz is 7.2, and the dielectric loss tangent is 3.6×10 -3 .

Embodiment 3

[0043] Raw materials and iron removal production process are the same as in Example 1. The concentration of the separation pulp is 14%, and the concentration of the pulp in the iron removal pool is 17%. Add concentrated sulfuric acid to adjust the pH value of the pulp to 1.5, add 4.5% sodium dithionite, react for 55 minutes, add 1.4% oxalic acid, and react for 16 minutes. The amount of polyacrylamide added is 0.4‰, the reaction time is 32min, and the pulp is washed 4 times until the pH value of the slurry is 6.5. The pulp is crushed to 3000 mesh by ultra-fine flakes. Fe was detected by chemical analysis 2 o 3 The content is 1.67%. The volume resistivity of fired electric porcelain is 2.2×10 at room temperature 12 Ω·m, the dielectric constant of 1MHz is 7.5, and the dielectric loss tangent value is 4×10 -3 .

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Abstract

The invention provides an iron removal method of ball clay for electric ceramic industry, which relates to the ball clay for electric ceramic industry. The method comprises the following steps of: pulping and separating raw ball clay ore so as to remove coarsely graded sand stone; enabling the ore pulp containing fine sands to enter a spiral classifier so as to obtain an ore pulp; conveying the ore pulp into a separation pool to be separated; enabling the ore pulp coming out the separation pool to enter a concentrating pool; pumping out fine sands at the bottom of the separation pool by usinga mud pump; conveying the ore pulp in the concentrating pool to an iron removing pool; adding water to the ore pulp to adjust the concentration of the ore pulp; adding industrial sulphuric acid to the ore pulp; adding sodium hydrosulfite to the ore pulp so as to carry out chemical reduction reaction; adding oxalic acid to the ore pulp so as to carry out complex reaction; filling up a water pool with c lean water so as to flush the ore pulp; adding polyacrylamide to the ore pulp so as to carry out flocculation reaction; discharging out the water after the pulp material is settled; adding cleanwater to the ore pulp so as to flush the ore pulp until the pH value of the ore pulp is neutral; discharging out the water after the ore pulp is settled; feeding the ore pulp into a stripper by usingthe mud pump so as to ultra-finely stripe the ore pulp; metering and packing the ball clay after the ball clay is filter-pressed and dried; and putting the ball clay into a warehouse for shipment.

Description

technical field [0001] The invention relates to a ball clay used in the electric porcelain industry, in particular to a production process for removing iron from the ball clay used in the electric porcelain industry. Background technique [0002] Spherical clay refers to the Cenozoic soft clay with a relatively new generation time. The overlying layer on it is thin and the pressure is low. It has not yet consolidated into rocks to form minerals, and has not been recrystallized and ordered, that is, it is mainly composed of disordered kaolinite. . Ball clay often contains a small amount of illite or I-M interlayer clay minerals and quartz, organic matter and iron, titanium coloring impurities, etc., the main chemical composition is SiO 2 、Al 2 o 3 、H 2 O and a small amount of Fe 2 o 3 、TiO 2 、Na 2 O, K 2 O, its colors are various, mainly black and gray. After roasting, it is white, yellow, brown, etc. depending on the content of impurities. [0003] Ball clay is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/10
Inventor 罗学涛傅翠梨张蓉吴浩黄平平李锦堂
Owner XIAMEN UNIV
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