CN103979810A - Method for preparing sulphoaluminate cement clinker by comprehensively utilizing papermaking white mud, bauxite and flue gas desulfurization gypsum - Google Patents
Method for preparing sulphoaluminate cement clinker by comprehensively utilizing papermaking white mud, bauxite and flue gas desulfurization gypsum Download PDFInfo
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- CN103979810A CN103979810A CN201410216591.6A CN201410216591A CN103979810A CN 103979810 A CN103979810 A CN 103979810A CN 201410216591 A CN201410216591 A CN 201410216591A CN 103979810 A CN103979810 A CN 103979810A
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- desulfurated plaster
- paper white
- cement clinker
- bauxitic clay
- white sludge
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Abstract
The invention relates to a method for preparing sulphoaluminate cement clinker by comprehensively utilizing papermaking white mud, bauxite and flue gas desulfurization gypsum. The method comprises the following steps: by taking the papermaking white mud, the bauxite and the flue gas desulfurization gypsum as raw materials, increasing the temperature to the range of 1200-1300 DEG C at a temperature rise rate of 20-30 DEG C per minute in an electric furnace, and preserving heat for 1.5-2.5h, thereby obtaining the sulphoaluminate cement clinker. Compared with the prior art, the method is capable of reducing serious burden on the environment due to that the papermaking white mud and the flue gas desulfurization gypsum are not utilized, and the treatment cost, while guaranteeing the performance of the product.
Description
Technical field
The present invention adopts the white clay (paper white sludge) of separating in paper industry causticization process, and the desulfurated plaster that the sulfurous gas of low-grade bauxitic clay and coal-burning power plant's discharge adopts desulfurizing and purifying Technology to process gained is manufactured novel sulphoaluminate cement clinker.The invention belongs to new material technology, environmental technology field.
Background technology
Compared with traditional silicate cement, calcium sulphoaluminate-belite cement has early strong, high-strength, low basicity, lowly creeps, freeze-thaw-, the feature such as impervious, corrosion-resistant, be widely used on high-grade concrete Structural Engineering, winter construction engineering, cement products, GRC goods and various special engineering, be subject to the extensive attention of engineering circles, application prospect is good.Current commercially available sulplo-aluminate-belite cement is mainly taking Wingdale, bauxite, natural dihydrate gypsum as raw material, the raw materials used Nonrenewable energy resources that are, along with the effective utilization of people to energy resource and more concern and the attention of environmental problem, and the progressively enforcement of the strategy of sustainable development, the substitute of seeking natural resource becomes the inexorable trend of current building material industry development.
Now, the annual paper white sludge producing in the paper mill of a middle and small scale has 10～150,000 tons at least.Be accompanied by that the newly-built chemical recovery system quantity of China's enterprises in pulp and paper industry increases, popularization, the causticization white clay of generation will significantly increase and accumulate, and all outside factories, discharge can cause serious environmental pollution.Make a general survey of recent domestic from mud comprehensive utilizating research and development situation, also there are various technology barriers or be limited by economic benefit and be difficult to promote in pulping and paper-making, the many problems that face in the comprehensive utilization of causticization white clay are not effectively solved from the comprehensive utilization of mud.At present, most enterprises stack causticization white clay or landfill with selecting, have both taken a large amount of soils, again because of in landfill process due to reasons such as compacting, rainfall and microorganism decomposition, thereby the high density percolate of generation and the dissolving of residual alkali cause groundwater pollution.The main component of paper white sludge is CaCO
3, belong to CaO-SiO
2-Al
2o
3system, close with the component of conventional gelling material, so paper white sludge reality has certain resource availability at building materials field.
China's flue gas desulfurization technique mainly contain wet desulfurizing process, dry desulfurization and semi-dry desulphurization etc., wherein, the application percentage of wet desulfurizing process is up to 85%.But the consequence that this limestone-gypsum method wet desulfurizing process produces is exactly desulfurated plaster (CaSO
42H
2o) a large amount of stackings, decomposition cause secondary pollution, and weather, soil, plant and human health are brought to harm.In addition, the by-product gypsum long-standing abuse already in many Production in Chemical Plant processes is for suffering from.
The present invention has fully utilized paper white sludge and these two kinds of industrial solid castoffs of desulfurated plaster, a certain amount of low-grade bauxite of admixture is as main raw material in addition, produce a kind of novel with calcium sulphoaluminate and Baily specially for main grog, can substitute the grog of common aluminosulfate cement.First this invention has alleviated paper white sludge and desulfurated plaster etc. owing to not being utilized the serious burden that environment is caused, and processing costs; The firing temperature of described sulfur-bearing cement clinker is between 1200～1300 DEG C, and firing temperature is lower than the firing temperature (1450 DEG C of left and right) of ordinary portland cement clinker; In making full use of waste, can improve cement output, reduce production costs, and effectively alleviate the consumption of the energy and alleviated the tense situation of Nonrenewable resources, there is good economic benefit and social benefit.
Summary of the invention
The object of the present invention is to provide a kind of method that paper white sludge, bauxitic clay and desulfurated plaster are prepared sulphoaluminate cement clinker that fully utilizes.
Comprehensive utilization paper white sludge, bauxitic clay and the desulfurated plaster that the present invention proposes prepared the method for sulphoaluminate cement clinker, concrete steps are as follows: adopting paper white sludge, bauxitic clay and desulfurated plaster is raw material, in electric furnace with 20～30 DEG C/min heat-up rate to 1200-1300 DEG C, insulation 1.5-2.5h, takes out and is chilled to room temperature; By levigate chamotte powder to 400m
2/ kg, obtains desired product; The formula of described sulplo-aluminate raw material is: paper white sludge 40wt%-50wt%, bauxitic clay 35wt%-45wt%, all the other are desulfurated plaster, and its gross weight meets 100%.
In the present invention, paper white sludge, bauxitic clay and desulfurated plaster are that raw material carries out pre-treatment before use, dry at 105 DEG C by paper white sludge used, bauxitic clay and desulfurated plaster, and mixing also grinding to specific surface area is 400 kg/m
2, and the screen over-size that the screen over-size of controlling 0.08mm is less than 8%, 0.02mm is less than 1%, and ageing 24 h, add suitable quantity of water, and the circular pat that is pressed into φ 30 mm × 5 mm is made sample.
The detection of products obtained therefrom of the present invention and test method:
1. free calcium oxide is measured and is undertaken by GB 176 " Method for chemical analysis of cement ";
2. specific surface area is undertaken by GB/T 8074 " cement specific surface area assay method (Bo Shi method) ";
3. flow of cement mortar is measured by GB/T 2419 methods;
4. undertaken by GB/T 1346 " cement normal consistency water consumption, time of coagulation, the stability method of inspection " time of coagulation, but be supplemented as follows and specify: test specimen in moisture curing box maintenance to the mensuration for the first time (or shift to an earlier date 10min by the presetting period of consulting measure) of carrying out the presetting period after adding water when 15min, while closing on initial set, the timed interval of mensuration is not more than 5 min; While closing on final set, the timed interval of mensuration is not more than 15min;
5. intensity is undertaken by GB/T 17671-1999 " Test method for strength of hydraulic cement mortar ", but is modified as follows and supplements;
A. the water consumption while inspection is scaled 211.5mL by water cement ratio 0.47() and mortar fluidity reach 165-175mm and determine, in the time that the mortar fluidity of preparing by water cement ratio 0.47 exceeds the scope of regulation, should make degree of mobilization reach the scope of regulation by 0.01 integer increases diminishing gray scale.Mortar fluidity is measured and is undertaken by GB/T 2419, and wherein the preparation of standard sand, cement-sand ratio and glue sand is undertaken by GB/T 17671-1999;
B. try body formed after, band mould is placed in temperature and is greater than the demoulding after 90% maintaining box maintenance 6h for (20 ± 1) DEG C, relative humidity, if the demoulding is may cause damage to examination body time, can proper extension demould time, but will note down at any time.
Each age strength/MPa of the each strength grade cement of table 1
6. cement degree of free swelling is undertaken by JC/T 313-2009 " the expansive cement rate of expansion method of inspection ", and is modified as follows:
A. test glue sand composition: cement 1000g, 0.5-1.0mm in iso standard sand, medium sand 500g;
B. test specimen band mould is placed on the maintenance 6h demoulding in moisture curing box, and surveys initial length, then puts into water maintenance.Test piece maintenance length of time is 28d.Measuring Time is just to count when long value from measuring test specimen.
Compared with prior art, the present invention, in ensureing product performance, can alleviate paper white sludge, desulfurated plaster etc. owing to not being utilized serious burden and processing costs that environment is caused.
Embodiment
Further illustrate the present invention below by embodiment.
Embodiment 1:
Have paper white sludge, bauxitic clay and desulfurated plaster with main raw material(s), main chemical compositions is as shown in table 2.
Raw-material chemical composition/the % of table 2
| Raw material | SO 3 | CaO | SiO 2 | Al 2O 3 | Fe 2O 3 | MgO | Na 2O | K 2O | TiO 2 | MnO |
| Paper white sludge | 0.64 | 55.7 | 13.21 | 7.62 | 0.51 | 0.25 | 0.21 | 0.20 | 0.25 | 0.03 |
| Bauxitic clay | － | 1.05 | 1.65 | 74.23 | 5.91 | 0.39 | － | － | － | － |
| Desulfurated plaster | 41.80 | 31.24 | 1.82 | 0.39 | 0.20 | 0.64 | 0.05 | 0.13 | － | － |
By levigate the raw material that prepare to calcining at 1250 DEG C after the identical fineness of ordinary Portland cement raw material, cooling rear levigate to specific surface area be 400kg/m
2cement clinker.The performance of GB 20472-2006 42.5 strength grade aluminosulfate cement standards and novel sulphoaluminate cement clinker is as shown in table 3.
Choose three formulas (mass ratio) of firing calcium sulphoaluminate belite cement grog:
1. paper white sludge: 40; Bauxitic clay: 45; Desulfurated plaster: 20;
2. paper white sludge: 45; Bauxitic clay: 35; Desulfurated plaster: 15;
3. paper white sludge: 50; Bauxitic clay: 35; Desulfurated plaster: 15;
Formula 1. middle clinker mineral content is roughly: C
4a
3 : 62%-65%; C
2s:1%-5%; C
2aS:6%-9%;
Formula 2. middle clinker mineral content is roughly: C
4a
3 : 47%-50%; C
2s:8%-10%; C
2aS:8%-10%;
Formula 3. middle clinker mineral content is roughly: C
4a
3 : 45%-50%; C
2s:12%-14%; C
2aS:8%-12%;
Table 3 42.5 strength grade aluminosulfate cement standards and novel sulfoaluminate clinker service check result
Note: test conditions is: testing laboratory's temperature: (20 ± 5) DEG C, relative air humidity is (65 ± 10) %, test specimen specification: 40mm × 40 mm × 160mm.
Claims (3)
1. one kind fully utilizes the method that paper white sludge, bauxitic clay and desulfurated plaster are prepared sulphoaluminate cement clinker, it is characterized in that, adopting paper white sludge, bauxitic clay and desulfurated plaster is raw material, in electric furnace with 20～30 DEG C/min heat-up rate to 1200-1300 DEG C, insulation 1.5-2.5h and obtaining; Taking-up is chilled to room temperature; By levigate chamotte powder to 400m
2/ kg, obtains desired product; The formula of described sulplo-aluminate raw material is: paper white sludge 40wt%-50wt%, bauxitic clay 35wt%-45wt%, all the other are desulfurated plaster, and its gross weight meets 100%.
2. a kind of method that paper white sludge, bauxitic clay and desulfurated plaster are prepared sulphoaluminate cement clinker that fully utilizes according to claim 1, it is characterized in that, the quality of described sulfoaluminate clinker meets " aluminosulfate cement " (GB 20472-2006) standard, i.e. Al in grog
2o
3>=30.0%; SiO
2≤ 10.5%, ultimate compression strength>=55MPa of sulphoaluminate cement clinker 3d.
3. a kind of method that paper white sludge, bauxitic clay and desulfurated plaster are prepared sulphoaluminate cement clinker that fully utilizes according to claim 1, it is characterized in that, paper white sludge, bauxitic clay and desulfurated plaster are that raw material carries out pre-treatment before use, dry at 105 DEG C by paper white sludge used, bauxitic clay and desulfurated plaster, mixing also grinding to specific surface area is 400 kg/m
2, and the screen over-size that the screen over-size of controlling 0.08mm is less than 8%, 0.02mm is less than 1%, and ageing 24 h, add suitable quantity of water, and the circular pat that is pressed into φ 30 mm × 5 mm is made sample.
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| CN201410216591.6A CN103979810A (en) | 2014-05-22 | 2014-05-22 | Method for preparing sulphoaluminate cement clinker by comprehensively utilizing papermaking white mud, bauxite and flue gas desulfurization gypsum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110183123A (en) * | 2019-03-28 | 2019-08-30 | 福建鼎盛元环保科技有限公司 | A kind of production line and its technique preparing sulphate aluminium cement using white clay |
| WO2023015619A1 (en) * | 2021-08-10 | 2023-02-16 | 山东大学 | Solid waste-based white sulphoaluminate cement, and preparation method therefor and use thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87106767A (en) * | 1987-10-05 | 1988-10-26 | 武汉工业大学 | The production method of aluminosulfate colour cement |
| CN101302082A (en) * | 2008-04-30 | 2008-11-12 | 同济大学 | Low-alkali sulpho-aluminate cement calcined by using refuse incineration flyash and preparation thereof |
| CN101357827A (en) * | 2008-09-23 | 2009-02-04 | 缪建通 | Method for producing cement clinker from paper manufacture waste slag mud |
| CN101921548A (en) * | 2009-06-10 | 2010-12-22 | 同济大学 | Method for preparing quick-hardened cement-based adhesive by utilizing refuse-incinerated fly ash |
| WO2011096604A1 (en) * | 2010-02-05 | 2011-08-11 | 한국지질자원연구원 | Calcium aluminate clinker using waste material and manufacturing method thereof |
| CN102336532A (en) * | 2011-06-30 | 2012-02-01 | 唐维富 | High-activity micro powder or cement produced by using papermaking waste residue and preparation method thereof |
-
2014
- 2014-05-22 CN CN201410216591.6A patent/CN103979810A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87106767A (en) * | 1987-10-05 | 1988-10-26 | 武汉工业大学 | The production method of aluminosulfate colour cement |
| CN101302082A (en) * | 2008-04-30 | 2008-11-12 | 同济大学 | Low-alkali sulpho-aluminate cement calcined by using refuse incineration flyash and preparation thereof |
| CN101357827A (en) * | 2008-09-23 | 2009-02-04 | 缪建通 | Method for producing cement clinker from paper manufacture waste slag mud |
| CN101921548A (en) * | 2009-06-10 | 2010-12-22 | 同济大学 | Method for preparing quick-hardened cement-based adhesive by utilizing refuse-incinerated fly ash |
| WO2011096604A1 (en) * | 2010-02-05 | 2011-08-11 | 한국지질자원연구원 | Calcium aluminate clinker using waste material and manufacturing method thereof |
| CN102336532A (en) * | 2011-06-30 | 2012-02-01 | 唐维富 | High-activity micro powder or cement produced by using papermaking waste residue and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110183123A (en) * | 2019-03-28 | 2019-08-30 | 福建鼎盛元环保科技有限公司 | A kind of production line and its technique preparing sulphate aluminium cement using white clay |
| WO2023015619A1 (en) * | 2021-08-10 | 2023-02-16 | 山东大学 | Solid waste-based white sulphoaluminate cement, and preparation method therefor and use thereof |
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Application publication date: 20140813 |