Use of xonotlite as filler in papermaking

A xonotlite and paper-making filler technology, which is applied in the direction of paper, inorganic compound addition, fiber dispersant addition, etc., can solve the problems of short mixing time between filler and fiber, failure to meet paper index requirements, unfavorable physical filling of filler, etc., to achieve The effect of saving plant pulp fiber, low cost and high smoothness

Active Publication Date: 2016-01-20
DATANG INT HIGH ALUMINA COAL R & D CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method solves the shortcomings of traditional fillers with high density and fast settling speed, the mixing time of fillers and fibers is too short, which is not conducive to the full physical filling of fillers in fibers. A large amount of fillers are gathered on the surface, causing the phenomenon of "powder falling" on the paper surface
[0006] 3. At present, conventional fillers used in the papermaking field generally have a relatively high density. Even if a relatively high filler filling ratio is satisfied in the process, the thickness of fixed quantitative paper will be affected by the addition of a large amount of fillers, so that it cannot meet the index of paper Requirements, so in the case of paper thickness requirements, it is impossible to add too much traditional filler

Method used

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  • Use of xonotlite as filler in papermaking
  • Use of xonotlite as filler in papermaking
  • Use of xonotlite as filler in papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation of preliminary embodiment 1 xonotlite

[0037] Add 20 g of fly ash to 81.43 g of 14% sodium hydroxide solution, and form a slurry after stirring. Under this condition, the mass ratio of sodium hydroxide and fly ash dry basis is controlled to be 0.5:1, and the temperature of the slurry is Rising to 120°C, desiliconization under this condition for 2 hours, after the reaction, the desiliconization slurry is separated from the solid and liquid, and the desilication filtrate is finely filtered through a leaf filter. The solid is used as the raw material for the production of alumina, and the liquid is diluted to 2.67 L, whose SiO2 concentration is 2.99g / L, is used as a siliceous raw material for hydrothermal synthesis of xonotlite. Then the limestone obtained from the quarry is crushed, washed and graded, and the size is controlled to 80mm. It is calcined with 30mm anthracite in the vertical kiln, and the obtained lime is sieved to remove cinder (ash), small ...

Embodiment 2

[0038] The preparation of preliminary embodiment 2 xonotlite

[0039] Adding 20 g of fly ash to 60 g of 15% sodium hydroxide solution and stirring to form a slurry, under this condition the mass ratio of sodium hydroxide and fly ash dry basis is controlled to be 0.45:1, and the temperature of the slurry rises To 115°C, desiliconization under this condition for 3 hours, after the reaction, the desiliconization slurry is separated from the solid and liquid, and the desilication filtrate is finely filtered through a leaf filter. The solid is used as the raw material for the production of alumina, and the liquid is diluted to 3L. Its SiO2 concentration is 2.67g / L, and it is used as a siliceous raw material for hydrothermal synthesis of xonotlite. After the limestone obtained from the quarry is crushed, washed and graded, the size is controlled to be 70mm, and 25mm anthracite is used for calcination in the vertical kiln, and the obtained lime is sieved to remove cinder (ash) and sm...

Embodiment 3

[0040] The preparation of preliminary embodiment 3 xonotlite

[0041] Fly ash 20g is joined in the sodium hydroxide solution 75g that concentration is 16%, forms slurry after stirring, controlled the mass ratio of sodium hydroxide and fly ash dry basis under this condition to be 0.6:1, the slurry temperature rises To 125°C, desiliconization under this condition for 2.5 hours, after the reaction, the desiliconization slurry is separated from solid and liquid, and the desilication filtrate is finely filtered through a leaf filter. The solid is used as the raw material for the production of alumina, and the liquid is diluted to 4L , whose SiO2 concentration is 2.88g / L, it is used as a siliceous raw material for hydrothermal synthesis of xonotlite. Then the limestone obtained from the quarry is crushed, washed and graded, and the size is controlled to 90mm. It is calcined with 35mm anthracite in the shaft kiln, and the obtained lime is sieved to remove cinder (ash), small lime and...

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Abstract

The invention discloses application of xonotlite as a paper making filler. High-filler-content paper is produced with 40-60 percent of plant pulp fibrous raw material serving as a framework, 40-60 percent of the xonotlite serving as the paper making filler and a water-soluble macromolecular multipolymer serving as a reinforcing agent according to the conventional paper making process method. Compared with the conventional paper making method, the method adopted in the invention has the advantages that the xonotlite is taken as the paper making filler, so that the phenomenon of powder falling of the filler on a paper making surface is avoided in a paper making process, the retention rate of the filler is generally 55-85 percent after being loaded onto a net of a paper machine, being 20-50 percent higher than that of the conventional paper making filler, and waste of the filler is reduced effectively; paper produced with the method has the advantages of low extension rate, high opacity, high smoothness, no pollution, degradability, recyclability, low cost and the like.

Description

technical field [0001] The invention relates to a new application of xonotlite, in particular to the application of xonotlite as a papermaking filler to manufacture cultural paper, and belongs to the application field of xonotlite in papermaking. Background technique [0002] At present, in the field of conventional paper production, taking cultural paper as an example, a large amount of plant fiber pulp is used as the paper skeleton, and about 10% to 25% of calcium carbonate or calcium carbonate is added to the plant fiber through the flow delivery system. Traditional mineral fillers such as talcum powder and a small amount of chemical additives complete papermaking. This kind of paper has high printing performance, writing performance and other performances, and has played an indelible role in the development of human culture and spiritual civilization and the continuation of history. The use of fillers in the paper industry is to achieve the purpose of improving paper un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/68D21H21/18D21H21/08D21H21/10
Inventor 徐鹏孙俊民张战军王成海魏晓芬何路东马鹏程
Owner DATANG INT HIGH ALUMINA COAL R & D CENT
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