CN101792278A - Method for producing cement retarder through phosphogypsum - Google Patents
Method for producing cement retarder through phosphogypsum Download PDFInfo
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- CN101792278A CN101792278A CN 201010143052 CN201010143052A CN101792278A CN 101792278 A CN101792278 A CN 101792278A CN 201010143052 CN201010143052 CN 201010143052 CN 201010143052 A CN201010143052 A CN 201010143052A CN 101792278 A CN101792278 A CN 101792278A
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Abstract
The invention relates to a method for producing a cement retarder through scrap phosphogypsum, which comprises the following steps: 1. adding a modifying agent and a quality improver into phosphogypsum and mixing; 2. pulverizing the mixture through a pulverizer; 3. stacking and aging the pulverized mixture; 4. drying the aged mixture; 5. kneading and compacting the dried mixture through a kneading machine; and 6. granulating through a granulator. The invention has the advantages of short process flow, high production efficiency, low content of product impurities, stable quality, particularly low consumption and remarkable economic benefit.
Description
Technical field
The present invention relates to the production method of cement setting retarder, relate in particular to the method for the discarded producing cement retarder through phosphogypsum of a kind of usefulness.
Background technology
Phosphogypsum making cement retardant all has application in various degree in countries in the world, wherein utilizes to be preferably Japan, and secondly be Britain and Germany.The cement setting retarder 75% of Japan derives from phosphogypsum at present, and 25% adopts other chemical gypsum.Japanese, German ardealite setting retarder for cement all adopts half water technological line, promptly adds in the properties-correcting agent etc. and detrimental impurity, makes it be converted into inert substance, and the proper temperature calcining obtains the anhydride and the half water thing of solubility again, adds the water balling-up at last.Half water technological line technical process is long, and utility appliance and personnel dispose many, and the energy consumption height has discharge of wastewater, contaminate environment.
China's phosphogypsum utilization is started late, and particularly utilizes the research work of phosphogypsum making cement retardant to make slow progress.At present, there is a cover cement setting retarder production line in Tongling, Anhui chemical industry group, and the state of the art of this production line has been represented China's advanced degree of this technology at present.Its basic procedure is
This technology consumes substantially and is:
| Title | Phosphogypsum/butt | Lime | Water | Electricity | Reduced fuel oil |
| The norm quota of consumption | ??900kg | ??30kg | ??300kg | ??25kwh | ??60kg |
Annotate: the norm quota of consumption is a cement setting retarder per ton.
The requirement that 42.5 ordinary Portland cements are produced in its product basic symbols symphysis, initial set, final set, anti-folding, resistance to compression are also up to standard.But the shortcoming of this technology is: 1. the phosphogypsum quality is stable inadequately, does not particularly reach requirement time of coagulation sometimes.2. β-phosphogypsum need be calcined, and also need dry after the product granulation, and energy consumption is big.3. the smoke pollution environment that produces of calcination of beta-phosphogypsum.
Summary of the invention
Purpose of the present invention provides a kind of processing method with phosphogypsum dry production cement setting retarder, and with this explained hereafter cement setting retarder, steady quality, energy consumption is low, and is pollution-free, and flow process is short, efficient is high, and economy, environmental benefit are remarkable.
Technical scheme of the present invention is:
A kind of method with producing cement retarder through phosphogypsum comprises step:
1.. in phosphogypsum, add properties-correcting agent and upgrader, mix;
2.. compound is pulverized with pulverizer;
3.. the compound after will pulverizing is stacked ageing;
4.. with the compound drying after the ageing;
5.. the compound behind the drying is closely knit with rubbing the kneading of material machine;
6.. use the tablets press granulation.
Described phosphogypsum is moisture about 15% discarded phosphogypsum; Described properties-correcting agent is carbide slag, and add-on is the 3-5% of phosphogypsum weight; Described upgrader is the polysilicon waste residue, and add-on is 1% of a phosphogypsum weight.
Described compound is crushed to particle diameter less than 5mm.
Described compound is stacked the aged time greater than 24h.
Described compound exsiccant step is, dries by the fire to water content approximately 12% earlier under 300 ℃ ± 10 ℃ environment of temperature with dryer, with the pneumatic conveyor conveying, dries up surface water again, makes mixture moisture content about 10%.
Described dryer adopts electromagnetism heating, drying machine.
Described tablets press is the roller press type tablets press.
Beneficial effect of the present invention:
Above-mentioned technical process is short, the production efficiency height, the product foreign matter content is low, steady quality, especially consume low, remarkable in economical benefits.
The retardant norm quota of consumption per ton sees Table 1
Table 1
| Title | Phosphogypsum/butt | Properties-correcting agent | Electricity | Coal-fired |
| The norm quota of consumption | ??950-970kg | ??30-50kg | ??10kwh | ??--- |
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Embodiment
Technical process of the present invention is referring to Fig. 1: from the phosphogypsum water content of phosphatization factory generally about 15%, deliver to the production scene with rotary conveyor, add carbide slag as properties-correcting agent, add-on is the 3-5% of phosphogypsum weight, add the polysilicon waste residue as upgrader, add-on is 1% of a phosphogypsum weight; Send into the double-rotor mill mixing and be crushed to particle diameter less than 5mm, restore more than the heap canopy ageing 24h, use electromagnetism heating, drying machine heat drying then, heating and temperature control to water content 12%, is transported into the material machine of rubbing with rotary conveyor at 290～310 ℃ again, during haul, aim at rotary conveyor with blower fan and blow, slough the surface water of compound, make its water content reduce to 10%; With rubbing the material machine that the compound kneading is closely knit again, eliminate air gap; Send into the granulation of pair roller ball press then, promptly get the cement setting retarder particle.
Wherein electromagnetism heating, drying machine and non-slurry pelletizing are present latest model equipment, and dependable performance has a lot of advanced persons' technical characterstic.By electromagnetism heating, drying machine, material moisture content is controlled in 12%, and the oven dry energy consumption is reduced greatly, and useless on a small quantity flue gas is also accomplished the discharging of sack cleaner.No waste water produces, and can not produce secondary pollution.
The dry method rolling granulation is in the emerging technology that grew up in recent years, and along with the raising of environmental protection demand and Automation of Manufacturing Process degree, its importance shows day by day." powder-like product granulating " become the inexorable trend of world's powder post-processing technology.
Its principle of work is: dry material slave unit top adds, enter pair roller through the degassing, preloaded helical compression, under the great squeeze effect of pair roller, make material generation viscous deformation and be compressed into definite shape (phosphogypsum is generally made the flat particle shape of 25mmX10mm).
Products characteristics:
(1) material does not add any wetting agent through the moulding of mechanical pressure enforce compression, and product purity is guaranteed.
(2) technological process is brief, and energy consumption is low, and auxiliary equipment and personnel dispose few.
(3) the direct granulation of dry powder need not follow-up dry run.
(4) granule strength is high, and the raising of bulk density is all more remarkable than other granulation modes.
(5) operating flexibility is large, wide accommodation, and the large I of granule strength is regulated by hydraulic pressure power.
(6) system's sealing and circulating operation can realize continuous, automated production.
This ardealite dry method is exempted from calcining cement set retarder production technology and is with respect to the most basic difference of existing phosphogypsum retardation setting agent producing process: at present application of ardealite as cement retardant all adopts half water technology path basically, yields poorly, energy consumption is high.
The ardealite dry method is exempted from calcining cement set retarder production technology modification characteristic:
The modified technique link takes full advantage of local waste residue, without the calcining link, needs oven dry moisture low in the technique, and production process is without waste water, toxic emission, has really realized low energy consumption, has discharged security civilization production less; Thoroughly abandoned semidry method (or) wet granulation process, adopt most advanced non-slurry pelletizing technology, both saved water resource, greatly improved again the serviceability of pellet; Whole technological process is simple, smooth and easy, is convenient to realize automation, large-scale production, for ardealite provides the technology guarantee as the cement retardative agent in a large number.
Claims (8)
1. method with producing cement retarder through phosphogypsum comprises step:
1.. in phosphogypsum, add properties-correcting agent and upgrader, mix;
2.. compound is pulverized with pulverizer;
3.. the compound after will pulverizing is stacked ageing;
4.. with the compound drying after the ageing;
5.. the compound behind the drying is closely knit with rubbing the kneading of material machine;
6.. use the tablets press granulation.
2. method according to claim 1 is characterized in that: described phosphogypsum is moisture about 15% discarded phosphogypsum;
3. method according to claim 1 is characterized in that: described properties-correcting agent is carbide slag, and add-on is the 3-5% of phosphogypsum weight; Described upgrader is the polysilicon waste residue, and add-on is 1% of a phosphogypsum weight.
4. method according to claim 1 is characterized in that: described compound is crushed to particle diameter less than 5mm.
5. method according to claim 1 is characterized in that: described compound is stacked the aged time greater than 24h.
6. method according to claim 1, it is characterized in that: described compound exsiccant step is, dries by the fire to water content approximately 12% earlier under 300 ℃ ± 10 ℃ environment of temperature with dryer, carries with pneumatic conveyor again, dry up surface water, make mixture moisture content about 10%.
7. method according to claim 6 is characterized in that: described dryer is an electromagnetism heating, drying machine.
8. method according to claim 1 is characterized in that: described tablets press is the roller press type tablets press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010143052 CN101792278B (en) | 2010-04-06 | 2010-04-06 | Method for producing cement retarder through phosphogypsum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010143052 CN101792278B (en) | 2010-04-06 | 2010-04-06 | Method for producing cement retarder through phosphogypsum |
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| CN101792278A true CN101792278A (en) | 2010-08-04 |
| CN101792278B CN101792278B (en) | 2013-01-23 |
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| CN 201010143052 Expired - Fee Related CN101792278B (en) | 2010-04-06 | 2010-04-06 | Method for producing cement retarder through phosphogypsum |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531441A (en) * | 2012-02-28 | 2012-07-04 | 云南新龙矿物质饲料有限公司 | Production method and product of cement retarder from ardealite |
| CN105314911A (en) * | 2015-11-25 | 2016-02-10 | 四川什邡市星天丰科技有限公司 | Purification ardealite cement retarder and preparation process and device thereof |
| CN107140861A (en) * | 2017-06-21 | 2017-09-08 | 湖北宜化集团有限责任公司 | A kind of method using fresh producing cement retarder through phosphogypsum |
| CN111732361A (en) * | 2020-04-24 | 2020-10-02 | 四川省星船城水泥股份有限公司 | Production method for using multisource industrial by-product gypsum as cement retarder |
| CN111960710A (en) * | 2020-08-24 | 2020-11-20 | 荆门新洋丰中磷肥业有限公司 | Method for reducing water content of finished phosphogypsum retarder |
| CN112851175A (en) * | 2021-02-20 | 2021-05-28 | 四川省生态环境科学研究院 | Device and method for preparing cement retarder by adopting industrial waste residues |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376574A (en) * | 2008-09-23 | 2009-03-04 | 德阳利森水泥有限公司 | Process and apparatus for producing cement retarder using ardealite waste liquor |
-
2010
- 2010-04-06 CN CN 201010143052 patent/CN101792278B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376574A (en) * | 2008-09-23 | 2009-03-04 | 德阳利森水泥有限公司 | Process and apparatus for producing cement retarder using ardealite waste liquor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531441A (en) * | 2012-02-28 | 2012-07-04 | 云南新龙矿物质饲料有限公司 | Production method and product of cement retarder from ardealite |
| CN105314911A (en) * | 2015-11-25 | 2016-02-10 | 四川什邡市星天丰科技有限公司 | Purification ardealite cement retarder and preparation process and device thereof |
| CN105314911B (en) * | 2015-11-25 | 2018-05-04 | 四川什邡市星天丰科技有限公司 | A kind of preparation process and device of purification type ardealite setting retarder for cement |
| CN107140861A (en) * | 2017-06-21 | 2017-09-08 | 湖北宜化集团有限责任公司 | A kind of method using fresh producing cement retarder through phosphogypsum |
| CN111732361A (en) * | 2020-04-24 | 2020-10-02 | 四川省星船城水泥股份有限公司 | Production method for using multisource industrial by-product gypsum as cement retarder |
| CN111960710A (en) * | 2020-08-24 | 2020-11-20 | 荆门新洋丰中磷肥业有限公司 | Method for reducing water content of finished phosphogypsum retarder |
| CN112851175A (en) * | 2021-02-20 | 2021-05-28 | 四川省生态环境科学研究院 | Device and method for preparing cement retarder by adopting industrial waste residues |
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| CN101792278B (en) | 2013-01-23 |
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