Preparation method of high-dispersibility white carbon black

Abstract

The invention discloses a preparation method of high-dispersibility white carbon black. The preparation method comprises following steps: kaolin tailing is taken as a raw material, a modifier is added into the kaolin tailing for activation, and water is added so as to obtain a slurry with a certain ratio; the slurry is delivered into a reaction vessel, sulfuric acid is added, and acidolysis heat is used for reaction; an obtained mixed slurry is subjected to solid-liquid separation so as to obtain a liquid ingredient which is aluminum sulfate, and a solid ingredient (filter residue) which is white carbon black; the solid ingredient (filter residue) is subjected to washing, drying, and scattering so as to obtain high-dispersibility white carbon black. The preparation method possesses following advantages: kaolin tailing is taken as a silicon source, wastes are changed into valuables, greater economic significance and higher environmental protection value are achieved, the preparation method is simple, fixed asset cost is low, the raw material is widely available, production cost is low, and no three wastes are discharged.

Description

technical field

[0001] The invention relates to the technical field of white carbon black, in particular to a preparation method of highly dispersible white carbon black. Background technique

[0002] Kaolin tailings are solid wastes discharged from kaolin mines after beneficiation. With the increasing discharge, the problems are becoming more and more serious. At present, the total amount of kaolin used in my country is about 6 million tons per year. Due to the low utilization rate of kaolin resources, which is only about 20%, tens of millions of tons of kaolin tailings are produced every year, and it is increasing year by year. At present, there are few studies on the recycling of kaolin tailings, and most of them are stacked in the open air, or used for paving roads, returning to fields, and compacting foundations. With the continuous accumulation of tailings, a large amount of land is occupied, water quality is polluted, vegetation is destroyed, soil erosion is caused, ...

Examples

Embodiment Construction

[0021] The present invention can be further understood through the examples of the present invention given below, but the protection of the present invention is not limited thereto.

[0022] 1. Raw material selection

[0023] Since the mineral composition of kaolin tailings is mainly quartz, feldspar, feldspar and a certain amount of kaolin, the chemical composition is mainly SiO2 (its content is more than 90%) and Al2O3. Therefore, the use of kaolin tailings to prepare white carbon black mainly solves the separation problem of aluminum-containing minerals and quartz in filter residues. Generally, ordinary washed soil can be used. On this basis, kaolin with high aluminum content, high whiteness and low impurities is selected as raw material.

[0024] 2. Preparation method:

[0025] First, add a modifier to the kaolin tailings to activate, add water to adjust a certain proportion of slurry, then add sulfuric acid to the reaction kettle and use acidolysis heat to react; the ob...

technical field

[0001] The invention relates to the technical field of white carbon black, in particular to a preparation method of highly dispersible white carbon black. Background technique

[0002] Kaolin tailings are solid wastes discharged from kaolin mines after beneficiation. With the increasing discharge, the problems are becoming more and more serious. At present, the total amount of kaolin used in my country is about 6 million tons per year. Due to the low utilization rate of kaolin resources, which is only about 20%, tens of millions of tons of kaolin tailings are produced every year, and it is increasing year by year. At present, there are few studies on the recycling of kaolin tailings, and most of them are stacked in the open air, or used for paving roads, returning to fields, and compacting foundations. With the continuous accumulation of tailings, a large amount of land is occupied, water quality is polluted, vegetation is destroyed, soil erosion is caused, ...

Examples

Embodiment Construction

[0021] The present invention can be further understood through the examples of the present invention given below, but the protection of the present invention is not limited thereto.

[0022] 1. Raw material selection

[0023] Since the mineral composition of kaolin tailings is mainly quartz, feldspar, feldspar and a certain amount of kaolin, the chemical composition is mainly SiO2 (its content is more than 90%) and Al2O3. Therefore, the use of kaolin tailings to prepare white carbon black mainly solves the separation problem of aluminum-containing minerals and quartz in filter residues. Generally, ordinary washed soil can be used. On this basis, kaolin with high aluminum content, high whiteness and low impurities is selected as raw material.

[0024] 2. Preparation method:

[0025] First, add a modifier to the kaolin tailings to activate, add water to adjust a certain proportion of slurry, then add sulfuric acid to the reaction kettle and use acidolysis heat to react; the ob...

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