Method for synthesizing calcium silicate filler by utilizing desilication solution, paper pulp fibers and lime milk

A technology of pulp fiber and desiliconization solution, which is applied in pulp beating method, fiber raw material treatment, silicate, etc., can solve the problems of paper strength performance decline, uneven dispersion, easy flocculation, etc., and achieve the improvement of filler content and reaction Uniform and stable effect

Active Publication Date: 2016-08-17
DATANG INT HIGH ALUMINA COAL R & D CENT
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  • Abstract
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Problems solved by technology

[0007] The purpose of the present invention is exactly to the deficiency that above-mentioned prior art exists, provides a kind of method that utilizes desiliconization liquid, paper pulp fiber and lime milk to synthesize calcium silicate filler, replaces traditional mineral filler in paper with this calcium silicate filler, solves the problem of It eliminates the uneven dispersion, easy flocculation, large consumption of silicate, decreased paper strength performance after high filling and high cost of synthetic silicate filler in transportation in the prior art. technical issues

Method used

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  • Method for synthesizing calcium silicate filler by utilizing desilication solution, paper pulp fibers and lime milk
  • Method for synthesizing calcium silicate filler by utilizing desilication solution, paper pulp fibers and lime milk
  • Method for synthesizing calcium silicate filler by utilizing desilication solution, paper pulp fibers and lime milk

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Embodiment 1

[0026] SiO2 concentration is 69.0g / L, NaO2 concentration is 50g / L in desiliconization solution 500ml, add 100g absolute dry coniferous wood pulp, fully mix and soak for 4h, control the pulp concentration in the mixed solution to be 19%, then soak the soaked The fiber desiliconization liquid mixed liquid is decomposed and beaten, and the beating degree is controlled to 56oSR. After the beating is completed, the pulp concentration is adjusted to 6%, and the desilicate is carried out; the desiliconized fiber desiliconized liquid mixed pulp is heated to 75°C for preheating, During the preheating process, the stirring speed was controlled to be 201rpm, and the preheating time was 30min; after the fiber desiliconization liquid mixed slurry was preheated, the heating temperature was kept constant, and the stirring speed was increased to 301rpm, and the lime milk suspension was slowly added at the same time. The concentration of calcium oxide in the milk of lime added is CaO: 225g / L, a...

Embodiment 2

[0031] SiO2 concentration: 79.0g / L, NaO2 concentration: 500ml of desiliconization solution of 60g / L, add 100g absolute dry softwood wood pulp, mix fully and soak for 8h, control the pulp concentration in the mixed solution to be 25%, and then moisten The soaked fiber desiliconization liquid mixed liquid is decomposed and beaten, and the beating degree is controlled to 65oSR. After the beating is completed, the pulp concentration is adjusted to 10%, and the desiliconated fiber is desiliconized. Heat, during the preheating process, control the stirring speed to 300rpm, and the preheating time is 30min; after the fiber desiliconization liquid mixed slurry is preheated, keep the heating temperature constant, increase the stirring speed to 310rpm, and slowly add the lime milk suspension , the calcium oxide concentration in the milk of lime added is CaO: 235g / L, the amount of addition is controlled at the CaO in the milk of lime and the SiO2 mass ratio in the desiliconization solutio...

example 2

[0033] This method and GCC, PCC filler paper performance comparison table under table 2 example 2 conditions

[0034]

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Abstract

The present invention relates to a method for synthesizing a calcium silicate filler by utilizing the desilication solution, paper pulp fibers and the lime milk. The method comprises the steps of mixing up the desilication solution with paper pulp fibers, swelling up, defibering and pulping the obtained mixture, adjusting the concentration of the mixture, adding the lime milk, swapping out the sodium hydroxide solution, and successively conducting the filtering, washing and collecting operation to finally obtain the calcium silicate filler. According to the technical scheme of the invention, the method solves the problem that the calcium silicate and the like, adopted as paper-making fillers in the prior art, are low in retention rate and large in consumption amount. Meanwhile, the method also directly solves the problems in the prior art that the calcium silicate filler is not uniformly dispersed in the slurry after being filled and easy to gather, the paper is reduced in strength performance after being highly filled, and the calcium silicate filler is high in transportation cost. At the same time, the method realizes the recovering and the recycling of the sodium hydroxide solution, thus having great popularization and application value.

Description

technical field [0001] The invention relates to a method for synthesizing calcium silicate filler by using desiliconization liquid, pulp fiber and milk of lime, and belongs to the technical field of papermaking. Background technique [0002] The advantages of mineral fillers in improving paper performance, reducing production costs and energy consumption make them widely used in the paper industry. Traditional mineral fillers include precipitated calcium carbonate (Precipitated Calcium Carbonate, PCC) and ground calcium carbonate (Ground Calcium Carbonate, GCC). The filling ratio generally does not exceed 30%. [0003] In recent years, the preparation of environmentally friendly and low-cost papermaking fillers using solid waste as the main raw material has become one of the research hotspots in the field of pulp and papermaking. As a solid waste of thermal power plants, fly ash has a large amount of emissions. For example, in my country, it is estimated that by 2020, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/70C01B33/24D21D1/02D21H11/00
CPCC01B33/24D21D1/02D21H11/00D21H17/70
Inventor 徐鹏王成海魏晓芬陈杨何路东
Owner DATANG INT HIGH ALUMINA COAL R & D CENT
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