CN104513037A - Cement prepared with sintered dry desulfurization ash as cement retarder and preparation method of the cement - Google Patents
Cement prepared with sintered dry desulfurization ash as cement retarder and preparation method of the cement Download PDFInfo
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- CN104513037A CN104513037A CN201310461029.5A CN201310461029A CN104513037A CN 104513037 A CN104513037 A CN 104513037A CN 201310461029 A CN201310461029 A CN 201310461029A CN 104513037 A CN104513037 A CN 104513037A
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Abstract
The invention relates to cement prepared with sintered dry desulfurization ash as a cement retarder and a preparation method of the cement. The raw materials of the cement comprise following components, by mass, 1-5% of the sintered dry desulfurization ash, 0-5% of desulfurization gypsum, 5-10% of water granulated slag, 0-5% of fly ash and 81-91% of a cement clinker. In the invention, the sintered dry desulfurization ash by 2-4% by weight or the sintered dry desulfurization ash being compounded with the desulfurization gypsum is employed as the cement retarder. The cement retarder is good in retarding effect. In addition, by means of full recovery and recycle of a desulfurization by-product containing sulfates in a production technology, each performance index of a prepared Portland cement and a prepared ordinary Portland cement conforms to requirements in GB/175 "General Portland cement".
Description
Technical field
The present invention relates to cement building material and solid waste field of comprehensive utilization, relate to a kind of cement sintering dry desulphurization ash being used as cement setting retarder and making specifically, and preparation method thereof.
Background technology
Steel industry is the second largest sulfur dioxide emissions industry being only second to power industry, and the sulfurous gas wherein produced in sintering circuit accounts for again 90% of whole industry sulfur dioxide emissions total amount.For completing the target of country " 12 " energy-saving and emission-reduction, steel industry will implement in full sintering flue gas desulfurization at " 12 " end.Along with the quickening of sintering flue gas desulfurization advances, the generating capacity of sintering desulfuration by product increases sharply, desulphurize fly ash by product-dry-process desulfurized ash that particularly dry desulfurization produces contains a large amount of calcium sulfite unstable phases and the iron dust containing of complicated component, utilizes technology to be faced with a difficult problem for treatment and use owing to lacking.
In American-European countries, the processing and utilizing for power-plant flue gas dry-process desulfurized ash carries out years of researches, has technology and the application experience of comparative maturity, but is mainly used in the aspects such as mine backfilling, land reclamation, road foundation construction.And for the rare report for the treatment of and use of sintering dry desulphurization ash.
At home, no matter be power-plant flue gas dry-process desulfurized ash or sintering dry desulphurization ash, its treatment and use research work then goes back ground zero, and sintering dry desulphurization ash takes landfill or stacked configuration process substantially.In order to avoid solving air SO
2cause new secondary pollution because desulfurizing byproduct can not get timely and effective treatment and use while polluting, utilize technological approaches in the urgent need to research and development sintering dry desulphurization ash.
Be applied in cement setting retarder at dry-process desulfurized ash, Chinese scholars is more mainly for the research of power plant's dry-process desulfurized ash, but because containing sulfur minerals main in desulphurize fly ash is calcium sulfite instead of calcium sulfate, result of study is not consistent, and can power plant's dry-process desulfurized ash be used for cement setting retarder and there is no final conclusion.And relate to sintering dry desulphurization ash for the research of cement setting retarder and Patents very few, company limited of Wuhan Safety and Environmental Protection Research Institute " a kind of method desulphurize fly ash modification being used as cement setting retarder " (201010509838.5) patent of invention and sintering dry desulphurization ash is only had to be used for cement setting retarder through retrieval relevant, but this method needs sintering dry desulphurization ash to be used for cement setting retarder after 450 ~ 700 DEG C of high temperature oxidation process, its processing cost is high, is difficult to carry out suitability for industrialized production.
The sintering dry desulphurization ash that the present invention utilizes dry sintering sulfur removal technology to produce is for cement retardative material, without the need to carrying out high-temperature calcination processing treatment, production technique is simple, production cost is low, retarding effect is good, and product performance meet the requirement of GB/175 " general purpose portland cement " mesosilicic acid salt cement and ordinary Portland cement.
Summary of the invention
For above shortcomings in prior art, technical problem to be solved by this invention is to provide a kind of by present cannot the sintering dry desulphurization ash cement that is applied to cement setting retarder to obtain that utilizes of industrial scale.By the comprehensive utilization adopting the technology of the present invention to realize sintering dry desulphurization ash resource utilization, industrialization, eliminate the pollution of solid waste, obtain good environmental benefit; Meanwhile, owing to decreasing the disposal amount of solid waste, solid waste is used as a kind of resources of production, also can obtains good economic benefit.The present invention seeks to be achieved through the following technical solutions:
Sintering dry desulphurization ash is used as the cement that cement setting retarder is made, its raw material is made up of the component of following mass percent: sintering dry desulphurization ash 1 ~ 5%, desulfurated plaster 0 ~ 5%, grain slag 5 ~ 10%, flyash 0 ~ 5%, cement clinker 81 ~ 91%.
Preferably, described cement sintering desulfuration ash being used as cement setting retarder and making, its raw material is made up of the component of following mass percent: sintering desulfuration ash 2-4%, desulfurated plaster 2 ~ 4%, grain slag 5 ~ 10%, flyash 3 ~ 5%, cement clinker 81 ~ 85%.
Specific surface area>=the 350m of described cement
2/ kg.
In the present invention,
Described sintering dry desulphurization ash is the desulfurizing byproduct of the containing sulfate material that steel enterprise sintering operation flue gas produces with the dry desulfurizing process that lime or slaked lime are sweetening agent, and wherein calcium sulfite content is 35%-65%, and calcium carbonate content is 25%-55%; Specific surface area is not less than 350m
2/ kg, water content is lower than 1%.
Described cement clinker is for meeting GB/T21372 " Portland clinker " requirement.
The solid waste that described grain slag produces for blast furnace ironmaking, its performance index meet GB/T203 " the granulated blast-furnace slag in cement " requirement, quality coefficient >=1.6.
Described flyash meets GB/T1596 " flyash in cement and concrete " requirement.
Described desulfurated plaster is the desulfurizing byproduct that power-plant flue gas wet desulfurizing process produces, and its main component is terra alba (CaSO
42H
2o), content is 85 ~ 95%.
Present invention also offers the preparation method of described cement, the steps include: to take the mixing of each raw material by proportioning, specific surface area 350m is made in oven dry, grinding
2the cement of/more than kg.
The present invention has following beneficial effect:
Mix with 2 ~ 4wt% dry sintering dry-process desulfurized ash list or be mixed for cement adjustable solidification agent again with desulfurated plaster, its retarding effect is good, and abundant recycling is carried out to the desulfurizing byproduct of the containing sulfate material produced in production technique, the silicate cement of preparation and ordinary Portland cement property indices all meet the requirement of GB/175 " general purpose portland cement ".
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
Sintering dry desulphurization ash 2wt%;
Desulfurated plaster 2wt%;
Grain slag 5wt%;
Cement clinker 91wt%.
Take each raw material by proportioning, normal temperature mixes, and 80-120 DEG C of oven dry, grinding make specific surface area>=350m
2the silicate cement of/kg, carry out consumptive use of water normal consistence, time of coagulation, stability, 3d, 28d strength trial according to GB/T1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) " respectively, test result is in table 1.
Embodiment 2
Sintering dry desulphurization ash 4wt%;
Grain slag 5wt%;
Cement clinker 91wt%.
Specific surface area>=350m is made by the preparation method of embodiment 1
2the silicate cement of/kg, carry out consumptive use of water normal consistence, time of coagulation, stability, 3d, 28d strength trial according to GB/T1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) " respectively, test result is in table 1.
Embodiment 3
Sintering dry desulphurization ash 2wt%;
Desulfurated plaster 2wt%;
Grain slag 10wt%;
Flyash 5wt%;
Cement clinker 81wt%.
Specific surface area>=350m is made by the preparation method of embodiment 1
2the ordinary Portland cement of/kg, carry out consumptive use of water normal consistence, time of coagulation, stability, 3d, 28d strength trial according to GB/T1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) " respectively, test result is in table 1.
Embodiment 4
Sintering dry desulphurization ash 4wt%;
Grain slag 10wt%;
Flyash 5wt%;
Cement clinker 81wt%.
Specific surface area>=350m is made by the preparation method of embodiment 1
2the ordinary Portland cement of/kg, carry out consumptive use of water normal consistence, time of coagulation, stability, 3d, 28d strength trial according to GB/T1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) " respectively, test result is in table 1.
Comparative example 1
Cement clinker 91wt%;
Grain slag 5%;
Desulfurated plaster 4%.
Specific surface area>=350m is made by the preparation method of embodiment 1
2the silicate cement of/kg, carry out consumptive use of water normal consistence, time of coagulation, stability, 3d, 28d strength trial according to GB/T1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) " respectively, test result is in table 1.
Comparative example 2
Desulfurated plaster 4wt%;
Grain slag 10wt%;
Flyash 5%
Cement clinker 81wt%.
Specific surface area>=350m is made by the preparation method of embodiment 1
2the ordinary Portland cement of/kg, carry out consumptive use of water normal consistence, time of coagulation, stability, 3d, 28d strength trial according to GB/T1346-2001 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) " respectively, test result is in table 1.
The test result of the cement that table 1 embodiment 1-4 and comparative example 1-2 makes
From the test result of embodiment and comparative example, compared with the silicate cement that the silicate cement that embodiment 1-2 makes and comparative example 1 are made, there is higher ultimate compression strength, and longer initial set and slow setting time; Compared with the ordinary Portland cement that the ordinary Portland cement that embodiment 3-4 makes and comparative example 2 are made, there is higher ultimate compression strength, and longer initial set and slow setting time.Therefore, sintering dry sent out desulphurize fly ash according to the present invention and be used as the cement that cement setting retarder makes, there is higher strength of cement and good retarding effect.
Above-described embodiment is interpreted as only being not used in for illustration of the present invention limiting the scope of the invention.After the content of having read the present invention's record, those skilled in the art can make various changes or modifications the present invention, and these equivalence changes and modification fall into the scope of the claims in the present invention equally.
Claims (4)
1. the cement that sintering dry desulphurization ash is made as cement setting retarder, it is characterized in that: its raw material is made up of the component of following mass percent: sintering dry desulphurization ash 1 ~ 5%, desulfurated plaster 0 ~ 5%, grain slag 5 ~ 10%, flyash 0 ~ 5%, cement clinker 81 ~ 91%.
2. cement as claimed in claim 1, is characterized in that: the specific surface area>=350m of described cement
2/ kg.
3. cement as claimed in claim 1, is characterized in that: described sintering dry desulphurization ash sulfite calcium contents is 35%-65%, and calcium carbonate content is 25%-55%; Specific surface area is not less than 350m
2/ kg, water content is lower than 1%.
4. the preparation method of cement according to any one of claim 1-3, the steps include: to take the mixing of each raw material by proportioning, specific surface area 350m is made in oven dry, grinding
2the cement of/more than kg.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016692A (en) * | 2015-07-07 | 2015-11-04 | 重庆大学 | Solid waste recycling process for preparing steam-cured bricks by using high calcium sulfite desulfurization ash |
| CN105541150A (en) * | 2015-12-23 | 2016-05-04 | 文登蓝岛建筑工程有限公司 | An active admixture prepared by utilizing semi-dry process desulfurized fly ash |
| CN106316443A (en) * | 2015-06-30 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Fly ash aerated concrete blocks with sinter-dried desulfurization ash and preparation method thereof |
| CN110526628A (en) * | 2018-05-23 | 2019-12-03 | 湖北工业大学 | A kind of preparation method of large dosage wet-milling phosphorus solid waste extra retarded set cementitious material |
| CN116553852A (en) * | 2023-04-10 | 2023-08-08 | 上海复洁环保科技股份有限公司 | Retarder and reinforcing agent, retarder cement for roads and preparation method of retarder and reinforcing agent |
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| CN1088896A (en) * | 1992-12-30 | 1994-07-06 | 山东矿业学院 | Building mortar |
| CN101559618A (en) * | 2009-06-02 | 2009-10-21 | 河北科技大学 | Process for producing fly ash steamed brick by using sintering machine desulfuration ash |
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2013
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Patent Citations (2)
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|---|---|---|---|---|
| CN1088896A (en) * | 1992-12-30 | 1994-07-06 | 山东矿业学院 | Building mortar |
| CN101559618A (en) * | 2009-06-02 | 2009-10-21 | 河北科技大学 | Process for producing fly ash steamed brick by using sintering machine desulfuration ash |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106316443A (en) * | 2015-06-30 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Fly ash aerated concrete blocks with sinter-dried desulfurization ash and preparation method thereof |
| CN105016692A (en) * | 2015-07-07 | 2015-11-04 | 重庆大学 | Solid waste recycling process for preparing steam-cured bricks by using high calcium sulfite desulfurization ash |
| CN105541150A (en) * | 2015-12-23 | 2016-05-04 | 文登蓝岛建筑工程有限公司 | An active admixture prepared by utilizing semi-dry process desulfurized fly ash |
| CN110526628A (en) * | 2018-05-23 | 2019-12-03 | 湖北工业大学 | A kind of preparation method of large dosage wet-milling phosphorus solid waste extra retarded set cementitious material |
| CN110526628B (en) * | 2018-05-23 | 2021-08-17 | 湖北工业大学 | Preparation method of high-doping-amount wet-grinding phosphorus-solid waste super-retarding cementing material |
| CN116553852A (en) * | 2023-04-10 | 2023-08-08 | 上海复洁环保科技股份有限公司 | Retarder and reinforcing agent, retarder cement for roads and preparation method of retarder and reinforcing agent |
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Application publication date: 20150415 |