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Method for preparing nanometer calcium carbonate special for water soluble ink by wet method

A technology of nano-calcium carbonate and water-based ink, applied in the direction of calcium carbonate/strontium/barium, ink, application, etc., can solve problems such as foaming, easy migration, and insufficient whiteness

Inactive Publication Date: 2009-11-04
福建省万旗非金属材料有限公司
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Problems solved by technology

[0010] The currently produced nano-calcium carbonate can only be used in traditional solvent-based inks due to different synthesis conditions and surface treatment limitations. When used in water-based inks, due to poor compatibility, insufficient whiteness, foaming, Easy migration and other shortcomings, so it is of great significance and economic benefit to develop a special nano-calcium carbonate for water-based ink

Method used

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  • Method for preparing nanometer calcium carbonate special for water soluble ink by wet method
  • Method for preparing nanometer calcium carbonate special for water soluble ink by wet method

Examples

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Embodiment 1

[0035] The limestone is crushed by the jaw crusher to a size of 30×100mm, and is conveyed to the top hopper of the shaft kiln by the conveyor belt. The low-grade limestone is calcined by an environmentally friendly and energy-saving steel shaft kiln. The calcining temperature is controlled between 950 and 1050°C. The time is 18-30 hours.

[0036]The calcined lime is screened, high-quality lime is selected for crushing, and then enters the digester for lime digestion. The temperature of the water for digesting lime is controlled at 65°C, and the dosage is 7 times the mass of lime. The primary lime slurry contains some coarse slag, and the concentration of calcium hydroxide is 13%. The undigested burnt lime, silicon dioxide, magnesium oxide and other impurities are removed by hydrocyclone separation and vibrating sieving to obtain a fine slurry.

[0037] The prepared seminal pulp is kept warm and aged by using the waste heat when digesting lime. After aging for 24 hours, add w...

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Abstract

The invention relates to a method for preparing nanometer calcium carbonate, in particular to a method for preparing nanometer calcium carbonate special for water soluble ink by a wet method. The method comprises the following steps: calcining and smashing limestone to prepare calcium oxide, classifying the calcium oxide, choosing fine quality calcium oxide to be slaked in a gyratory slaker, be aged twice and carbonized twice to prepare calcium carbonate. The method is characterized in that the calcium oxide undergoes slaking in the gyratory slaker and first aging, is added with a crystal control agent, undergoes second aging after undergoing first bubbling carbonation and is added with a material looseness modifier and a surface treatment agent to carry out second modification. The method farthest utilizes the low-grade limestone to prepare the nanometer calcium carbonate product special for water-based ink, with mean grain size of 10-40nm and specific surface of 40-70m / g and enhances the transparency and cohesive force of the ink.

Description

technical field [0001] The invention relates to a preparation method of nano-scale calcium carbonate, in particular to a method for preparing special nano-calcium carbonate for water-soluble ink by a wet method. technical background [0002] Nano-calcium carbonate refers to ultrafine powder with a particle size of less than 100nm. It is widely used in plastics, rubber, adhesives, coatings, inks and other fields. It is a new type of high-grade functional inorganic filler. [0003] At present, the technology for preparing ultrafine calcium inorganic powder in the world is represented by the process control technology of Japan and the addition of additives in European countries such as Germany. [0004] The former technology is based on the kinetics and thermodynamic principles of the calcium carbonate reaction process, and the purpose of controlling the carbonization reaction rate is achieved by adjusting the temperature, solid phase concentration, gas flow and other process p...

Claims

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Application Information

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IPC IPC(8): C01F11/18C09D11/02C09D11/00
Inventor 林积梁刘亚雄谢文清郑新烟罗伟黄文德
Owner 福建省万旗非金属材料有限公司
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