CN103193239A - Improved preparation method for combined production of calcium silicate filling material for papermaking by using fly ash - Google Patents
Improved preparation method for combined production of calcium silicate filling material for papermaking by using fly ash Download PDFInfo
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- CN103193239A CN103193239A CN2013100620531A CN201310062053A CN103193239A CN 103193239 A CN103193239 A CN 103193239A CN 2013100620531 A CN2013100620531 A CN 2013100620531A CN 201310062053 A CN201310062053 A CN 201310062053A CN 103193239 A CN103193239 A CN 103193239A
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Abstract
The invention provides an improved preparation method for combined production of a calcium silicate filling material for papermaking by using fly ash. According to the method, solid waste fly ash is used as a main raw material; a calcium silicate filling material for papermaking prepared by using a predesilicification soda lime sintering process is restricted in popularization and application as a wet part filling material for papermaking because of an excessively high pH value (higher than 12), so a part of the process is changed in the invention, and carbonization by carbon dioxide is utilized for lowering down the pH value of the filling material; reeling deflocculation and carbonization are finished at the same time, and a carbonized filling material is a mixture of calcium silicate and calcium carbonate, wherein a mol ratio of calcium carbonate to calcium silicate is 0.1-0.5: 1; calcium carbonate introduced after carbonization is a frequently used filling material for papermaking, and such complex formulation enables the pH value of a high-alkalinity calcium silicate filling material to be reduced to 9 to 10.5 and respective advantages of the calcium silicate filling material and a precipitated calcium carbonate filling material to be fully and integratedly used. The preparation method provided by the invention has the advantages of easy and convenient operation, small investment, low cost and good industrial application prospects.
Description
Technical field
The invention belongs to pulp technology for making paper, be specifically related to a kind of preparation method of improved paper grade (stock) flyash coproduction calcium silicate filling material.
Background technology
Refine the novel active silicate that forms from flyash processing, can be applicable to paper industry.But owing in the production process, for abundant reaction, must add the superfluous lime breast, cause the product Calucium Silicate powder to have high alkalinity.In order to reduce the calcium hydroxide content of Calucium Silicate powder, Chinese invention patent CN102190309A utilizes certain density sulfuric acid that the Calucium Silicate powder of this high basicity is washed, and reduces the content of its pH value and calcium hydroxide.But the use of sulfuric acid makes in the active silicic acid calcium that utilizes this method to produce and contains a certain amount of calcium sulfate.Though calcium sulfate belongs to micro-soluble material, to compare with calcium carbonate, its calcium ion solubility rate is brought up to more than 3.5% from 0.29% of commodity calcium carbonate.When this calcium silicate filling material that is mixed with calcium sulfate is applied to the filler when recycle at plain boiled water (especially) of paper, the calcium of stripping will have a strong impact on the result of use of wet end of machine chemical, produce tangible fouling simultaneously.
Summary of the invention
The objective of the invention is to propose a kind of preparation method of improved paper grade (stock) flyash coproduction calcium silicate filling material.By the filler that present method makes, its pH value is reduced to 9 ~ 10.5, the fully comprehensive calcium silicate filling material of the filler after the carbonization simultaneously and precipitated calcium carbonate fillers advantage separately.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
1) according to application number is: 200810112618.1, publication number is: the suspension of the moisture calcium silicate particle of the high basicity of CN101591023A " a kind of method of utilizing aluminous fly-ash to prepare calcium silicate micro power " preparation, and control that the mol ratio of milk of lime and Calucium Silicate powder is that 0.1～0.5:1 obtains Calucium Silicate powder suspension in this suspension;
2) mass concentration of adjusting Calucium Silicate powder suspension is 5%～40% and crosses 400 orders～800 eye mesh screens, removes the thick slag of macrobead;
3) add the dispersion agent polyoxyethylene PEO of relative Calucium Silicate powder oven-dry weight 0.1%～1% in the Calucium Silicate powder suspension after sieve, be pumped to cracking flossing machine after mixing, in cracking flossing machine, feed industrial carbon dioxide simultaneously, separate wadding and also carry out solid-liquid separation after the carbonization, namely get the finished product after the oven dry.
It is 0.01～0.1% dispersant solution that described dispersion agent is mixed with mass concentration earlier.
The pressure of described carbonic acid gas is 0.5～4kg, and temperature is 30～60 ℃, separates wadding carbonization time 5 ~ 60min, the calcium silicate filling material pH value 9 ~ 10.5 after the carbonization.
The present invention utilizes carbonic acid gas that excessive hydrogen calcium oxide in the calcium silicate filling material preparation process is carried out carbonization, make excessive calcium hydroxide generate calcium carbonate, thereby the dissoluble rate of calcium of control calcium silicate filling material prevents that the calcium ion of its stripping in paper production is to copying the influence of paper wet end system.Advantage and positively effect that the present invention has compared with the prior art are: the pH value that can reduce high basicity flyash coproduction active silicic acid calcium, avoided the introducing of micro-soluble material calcium sulfate, make the solubility rate of final product calcium ion reduce greatly and introduced part calcium carbonate, fully combine calcium silicate filling material and precipitated calcium carbonate fillers advantage separately, have the composite effect of filler, therefore the performance to filler itself also increases.
Embodiment
The present invention is described in more detail below in conjunction with embodiment.
Embodiment 1:
1) according to application number is: 200810112618.1, publication number is: the suspension of the moisture calcium silicate particle of the high basicity of CN101591023A " a kind of method of utilizing aluminous fly-ash to prepare calcium silicate micro power " preparation, and control that the mol ratio of milk of lime and Calucium Silicate powder is that 0.3:1 obtains Calucium Silicate powder suspension in this suspension;
2) mass concentration of adjusting Calucium Silicate powder suspension is 20% and crosses 800 eye mesh screens, removes the thick slag of macrobead;
3) get the dispersion agent polyoxyethylene PEO of Calucium Silicate powder suspension mesosilicic acid calcium oven-dry weight 0.1%, be mixed with mass concentration and be 0.02% dispersant solution, then dispersant solution is joined and be pumped to cracking flossing machine after mixing in the Calucium Silicate powder suspension after sieving, in cracking flossing machine, feed industrial carbon dioxide simultaneously, carry out solid-liquid separation after separating wadding and carbonization, wherein the pressure of carbonic acid gas is 2kg, and temperature is 50 ℃, separate wadding carbonization time 5min, namely get product after the oven dry.
Basicity to treated Calucium Silicate powder is analyzed, and records its PH=9.7, wherein calcium carbonate: Calucium Silicate powder is 0.3:1, and the calcium ion solubility rate is 0.23%, and the end product particle diameter is 4.8 μ m.
Embodiment 2:
1) according to application number is: 200810112618.1, publication number is: the suspension of the moisture calcium silicate particle of the high basicity of CN101591023A " a kind of method of utilizing aluminous fly-ash to prepare calcium silicate micro power " preparation, and control that the mol ratio of milk of lime and Calucium Silicate powder is that 0.1:1 obtains Calucium Silicate powder suspension in this suspension;
2) mass concentration of adjusting Calucium Silicate powder suspension is 10% and crosses 500 eye mesh screens, removes the thick slag of macrobead;
3) get the dispersion agent PEO of Calucium Silicate powder suspension mesosilicic acid calcium oven-dry weight 0.5%, be mixed with mass concentration and be 0.05% dispersant solution, then dispersant solution is joined and be pumped to cracking flossing machine after mixing in the Calucium Silicate powder suspension after sieving, in cracking flossing machine, feed industrial carbon dioxide simultaneously, carry out solid-liquid separation after separating wadding and carbonization, wherein the pressure of carbonic acid gas is 0.5kg, and temperature is 60 ℃, separate wadding carbonization time 10min, namely get product after the oven dry.
Embodiment 3:
1) according to application number is: 200810112618.1, publication number is: the suspension of the moisture calcium silicate particle of the high basicity of CN101591023A " a kind of method of utilizing aluminous fly-ash to prepare calcium silicate micro power " preparation, and control that the mol ratio of milk of lime and Calucium Silicate powder is that 0.4:1 obtains Calucium Silicate powder suspension in this suspension;
2) mass concentration of adjusting Calucium Silicate powder suspension is 5% and crosses 400 eye mesh screens, removes the thick slag of macrobead;
3) get the dispersion agent polyoxyethylene PEO of Calucium Silicate powder suspension mesosilicic acid calcium oven-dry weight 0.8%, be mixed with mass concentration and be 0.01% dispersant solution, then dispersant solution is joined and be pumped to cracking flossing machine after mixing in the Calucium Silicate powder suspension after sieving, in cracking flossing machine, feed industrial carbon dioxide simultaneously, carry out solid-liquid separation after separating wadding and carbonization, wherein the pressure of carbonic acid gas is 3kg, and temperature is 40 ℃, separate wadding carbonization time 30min, namely get product after the oven dry.
Embodiment 4:
1) according to application number is: 200810112618.1, publication number is: the suspension of the moisture calcium silicate particle of the high basicity of CN101591023A " a kind of method of utilizing aluminous fly-ash to prepare calcium silicate micro power " preparation, and control that the mol ratio of milk of lime and Calucium Silicate powder is that 0.2:1 obtains Calucium Silicate powder suspension in this suspension;
2) mass concentration of adjusting Calucium Silicate powder suspension is 30% and crosses 700 eye mesh screens, removes the thick slag of macrobead;
3) get the dispersion agent PEO of Calucium Silicate powder suspension mesosilicic acid calcium oven-dry weight 1%, be mixed with mass concentration and be 0.08% dispersant solution, then dispersant solution is joined and be pumped to cracking flossing machine after mixing in the Calucium Silicate powder suspension after sieving, in cracking flossing machine, feed industrial carbon dioxide simultaneously, carry out solid-liquid separation after separating wadding and carbonization, wherein the pressure of carbonic acid gas is 1kg, and temperature is 55 ℃, separate wadding carbonization time 60min, namely get product after the oven dry.
Embodiment 5:
1) according to application number is: 200810112618.1, publication number is: the suspension of the moisture calcium silicate particle of the high basicity of CN101591023A " a kind of method of utilizing aluminous fly-ash to prepare calcium silicate micro power " preparation, and control that the mol ratio of milk of lime and Calucium Silicate powder is that 0.5:1 obtains Calucium Silicate powder suspension in this suspension;
2) mass concentration of adjusting Calucium Silicate powder suspension is 40% and crosses 600 eye mesh screens, removes the thick slag of macrobead;
3) get the dispersion agent polyoxyethylene PEO of Calucium Silicate powder suspension mesosilicic acid calcium oven-dry weight 0.3%, be mixed with mass concentration and be 0.1% dispersant solution, then dispersant solution is joined and be pumped to cracking flossing machine after mixing in the Calucium Silicate powder suspension after sieving, in cracking flossing machine, feed industrial carbon dioxide simultaneously, carry out solid-liquid separation after separating wadding and carbonization, wherein the pressure of carbonic acid gas is 4kg, and temperature is 30 ℃, separate wadding carbonization time 40min, namely get product after the oven dry.
Claims (3)
1. the preparation method of an improved paper grade (stock) flyash coproduction calcium silicate filling material is characterized in that may further comprise the steps:
1) suspension of moisture calcium silicate particle of the high basicity of preparation, and control that the mol ratio of milk of lime and Calucium Silicate powder is that 0.1～0.5:1 obtains Calucium Silicate powder suspension in this suspension;
2) mass concentration of adjusting Calucium Silicate powder suspension is 5%～40% and crosses 400 orders～800 eye mesh screens, removes the thick slag of macrobead;
3) add the dispersion agent polyoxyethylene PEO of relative Calucium Silicate powder oven-dry weight 0.1%～1% in the Calucium Silicate powder suspension after sieve, be pumped to cracking flossing machine after mixing, in cracking flossing machine, feed industrial carbon dioxide simultaneously, separate wadding and also carry out solid-liquid separation after the carbonization, namely get the finished product after the oven dry.
2. the preparation method of improved paper grade (stock) flyash coproduction calcium silicate filling material according to claim 1 is characterized in that: it is 0.01～0.1% dispersant solution that described dispersion agent is mixed with mass concentration earlier.
3. the preparation method of improved paper grade (stock) flyash coproduction calcium silicate filling material according to claim 1, it is characterized in that: the pressure of described carbonic acid gas is 0.5～4kg, temperature is 30～60 ℃, separates wadding carbonization time 5 ~ 60min, the calcium silicate filling material pH value 9 ~ 10.5 after the carbonization.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891838A (en) * | 2015-05-19 | 2015-09-09 | 河北工程大学 | Method for extracting silicon and calcium from fly ash for filler reinforcing |
| CN105753001A (en) * | 2016-03-31 | 2016-07-13 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Method for washing and dealkalizing fiber in-situ synthesized calcium silicate |
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| JP2006263651A (en) * | 2005-03-25 | 2006-10-05 | Osaka Gas Co Ltd | Carbonated carbide, production method therefor, method for collecting zinc from fly ash from incinerator, and method for treating acidic gas in exhaust gas in incinerator |
| CN101003383A (en) * | 2007-01-21 | 2007-07-25 | 岳阳纸业股份有限公司 | New technique for refining filler of calcium carbonate from lime mud |
| CN101591023A (en) * | 2008-05-26 | 2009-12-02 | 同方环境股份有限公司 | A kind of method of utilizing aluminous fly-ash to prepare calcium silicate micro power |
| CN102747439A (en) * | 2011-04-21 | 2012-10-24 | 中国科学院合肥物质科学研究院 | Disperse nanocomposite and preparation method thereof |
| KR101221033B1 (en) * | 2012-05-16 | 2013-01-10 | 한국지질자원연구원 | Method for production of calcium carbonate with fly ash and carbon dioxide micro-bubble |
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2013
- 2013-02-27 CN CN2013100620531A patent/CN103193239A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006263651A (en) * | 2005-03-25 | 2006-10-05 | Osaka Gas Co Ltd | Carbonated carbide, production method therefor, method for collecting zinc from fly ash from incinerator, and method for treating acidic gas in exhaust gas in incinerator |
| CN101003383A (en) * | 2007-01-21 | 2007-07-25 | 岳阳纸业股份有限公司 | New technique for refining filler of calcium carbonate from lime mud |
| CN101591023A (en) * | 2008-05-26 | 2009-12-02 | 同方环境股份有限公司 | A kind of method of utilizing aluminous fly-ash to prepare calcium silicate micro power |
| CN102747439A (en) * | 2011-04-21 | 2012-10-24 | 中国科学院合肥物质科学研究院 | Disperse nanocomposite and preparation method thereof |
| KR101221033B1 (en) * | 2012-05-16 | 2013-01-10 | 한국지질자원연구원 | Method for production of calcium carbonate with fly ash and carbon dioxide micro-bubble |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891838A (en) * | 2015-05-19 | 2015-09-09 | 河北工程大学 | Method for extracting silicon and calcium from fly ash for filler reinforcing |
| CN104891838B (en) * | 2015-05-19 | 2017-05-31 | 河北工程大学 | It is a kind of that the method that silicon, calcium are used to prepare reinforcing agent is extracted from flyash |
| CN105753001A (en) * | 2016-03-31 | 2016-07-13 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Method for washing and dealkalizing fiber in-situ synthesized calcium silicate |
| CN105753001B (en) * | 2016-03-31 | 2017-12-19 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | A kind of method for carrying out washing dealkalize to fiber fabricated in situ calcium silicates |
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Application publication date: 20130710 |