CN104446067A - Method for producing belite-gypsum material by using sludge and waste gypsum through dry-process rotary kiln - Google Patents
Method for producing belite-gypsum material by using sludge and waste gypsum through dry-process rotary kiln Download PDFInfo
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- CN104446067A CN104446067A CN201410626634.8A CN201410626634A CN104446067A CN 104446067 A CN104446067 A CN 104446067A CN 201410626634 A CN201410626634 A CN 201410626634A CN 104446067 A CN104446067 A CN 104446067A
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- 239000010440 gypsum Substances 0.000 title claims abstract description 72
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 72
- 239000000463 material Substances 0.000 title claims abstract description 57
- 238000001035 drying Methods 0.000 title claims abstract description 50
- 239000010802 sludge Substances 0.000 title claims abstract description 48
- 239000002699 waste material Substances 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000000227 grinding Methods 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 49
- 239000000843 powder Substances 0.000 claims abstract description 42
- 239000013078 crystal Substances 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 238000001354 calcination Methods 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims description 44
- 235000012054 meals Nutrition 0.000 claims description 40
- 239000002893 slag Substances 0.000 claims description 37
- 239000010801 sewage sludge Substances 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 235000013339 cereals Nutrition 0.000 claims description 21
- 238000010899 nucleation Methods 0.000 claims description 18
- 230000004048 modification Effects 0.000 claims description 14
- 238000012986 modification Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 235000013312 flour Nutrition 0.000 claims description 13
- 235000019738 Limestone Nutrition 0.000 claims description 12
- 239000006028 limestone Substances 0.000 claims description 12
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 9
- 230000004927 fusion Effects 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000007711 solidification Methods 0.000 claims description 7
- 230000008023 solidification Effects 0.000 claims description 7
- 229910052925 anhydrite Inorganic materials 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 230000036571 hydration Effects 0.000 claims description 5
- 238000006703 hydration reaction Methods 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 238000007605 air drying Methods 0.000 claims description 4
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 4
- 239000004567 concrete Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 239000002989 correction material Substances 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- -1 fluorgypsum Substances 0.000 claims description 2
- 239000011505 plaster Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 31
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 19
- 238000007906 compression Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 16
- 239000003245 coal Substances 0.000 description 12
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 description 11
- 239000011707 mineral Substances 0.000 description 11
- 235000010755 mineral Nutrition 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 239000011398 Portland cement Substances 0.000 description 10
- 238000012937 correction Methods 0.000 description 10
- 239000011507 gypsum plaster Substances 0.000 description 10
- 239000010865 sewage Substances 0.000 description 10
- 230000008961 swelling Effects 0.000 description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 9
- 229910052698 phosphorus Inorganic materials 0.000 description 9
- 239000011574 phosphorus Substances 0.000 description 9
- 235000011114 ammonium hydroxide Nutrition 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000010304 firing Methods 0.000 description 8
- 239000002956 ash Substances 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 239000005864 Sulphur Substances 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 6
- 230000004913 activation Effects 0.000 description 5
- 229910001570 bauxite Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 5
- 238000006297 dehydration reaction Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 239000002440 industrial waste Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 230000002742 anti-folding effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- 235000012241 calcium silicate Nutrition 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241000707825 Argyrosomus regius Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 206010016654 Fibrosis Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- PFRUBEOIWWEFOL-UHFFFAOYSA-N [N].[S] Chemical compound [N].[S] PFRUBEOIWWEFOL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 210000003555 cloaca Anatomy 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
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- 239000006071 cream Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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- 239000003546 flue gas Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
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- 229910052604 silicate mineral Inorganic materials 0.000 description 1
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- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for producing a belite-gypsum material by using sludge and waste gypsum through a dry-process rotary kiln. The method comprises the following steps of (1) melting a sludge ridge grain seed crystal with high water content into modified sludge residues; (2) proportioning raw materials of the modified sludge residues, the waste gypsum and a correcting material according to a certain ratio, and grinding the raw materials by using a vertical mill to form raw material powder; (3) delivering the raw material powder obtained in the step (2) into a dry-process rotary kiln system, and calcining the raw material powder to form clinker; and (4) grinding the obtained clinker to obtain powder with the fineness of 0.08mm and the screen residue content of less than 20%. The method disclosed by the invention is simple, low in investment and cost, free of other secondary pollution and capable of absorbing the sludge and the waste gypsum on a large scale and in a recycling way, greatly reducing the energy consumption and relieving the environment pollution.
Description
Technical field
The present invention relates to a kind of method of mud, waste gypsum production belite-gypsum material, especially relate to a kind of method of dry-process rotary kiln mud, waste gypsum production belite-gypsum material.
Background technology
Current, built 3000 Duo Zuo sewage works of China, the primary mud (water ratio about 99%) that Mei Jian sewage work every day produces more than 3,000 ten thousand tons, so China's quantity of wastewater effluent is in fact more than 5 × 10
10m
3/ d.Primary mud water ratio after further conventional mechanicals processed only can be down to about 80%.If all sewage disposals, be the wet mud estimation of 80% containing 5 tons of water ratio by each ten thousand stere sewage, sludge quantity can be produced day more than 2,500,000 tons, sludge quantity can be produced year more than 900,000,000 tons.But, due to the reason of economy and technology, sludge treatment there is no to be stablized and rational outlet, total situation still based on landfill, stack, topple over---at present, the main method of disposal of mud has that ocean and culvert underdrain are toppled over, sanitary landfill, sludge composting, mud are dried and burned, but, topple over, sludge treatment mode that landfill, compost, burning etc. are traditional based on himself deficiency and defect, impelled sewage plant sludge to be treated as to solve the focus of Urban Environmental Problem.Therefore, the resource utilization realizing mud in sludge handling process becomes the important topic explored sludge pollution and thoroughly effect a radical cure.
At present, utilize mud as part material in cement production process or utilize the mud part coal substituted in manufacture of cement inside and outside Country, become the research topic of numerous scholar and a line scientific worker.
With regard to external, because sewage plant sludge process mainly carries out dewatered drying, burning, the research that its mud is used for cement concentrates on the lime-ash after mixing sludge incineration to produce so-called eco-cement.
Just domestic, mud carries out drying, it is very difficult at present to burn, because the flocculation colloidal moisture structure water-retentivity of mud itself is fabulous, itself composition is also very complicated, and dehydration, oven dry running cost are high; Further, the objectionable constituent such as chlor-alkali sulphur are also higher or higher, have impact on cement performance; By mud Substitute For Partial, coal-fired or raw material, not only increases enterprise's coal, power consumption, holds in the palm height enterprise operation cost, also can affect kiln condition in production and run.
On the other hand, industrial waste gypsum such as phosphogypsum is stored up or landfill or be poured into cloaca culvert, severe contamination groundwater resource in a large number.But, but still adopting the plaster of paris of resource-constrained at present when producing calcium sulphoaluminate cement, also result in the serious waste to gypsum resource.
Manufacture of cement is high energy-consuming enterprises, improves the burn-ability of grog to reduce sinter leaching energy consumption, promote environmental protection, make sulfurous gas and oxynitride discharge up to standard, be the important research direction of cement industry energy-saving and emission-reduction always.Traditional dry-process rotary kilns are produced, and because raw materials and fuel nitrogen sulphur content is higher, can not meet environmental emission standard.For addressing this problem, prior art is in raw material, allocate slaked lime or carbide slag into, or sprays into liming or soda ash in flue or Vertical Mill.In denitration to adopt ammoniacal liquor, urea element sprays in decomposing furnace, captured the oxygen in oxynitrides by the hydrogen in ammoniacal liquor urea, make the emission compliance of oxynitrides, but also have compressed the originally meagre profit margin of enterprise like this.In the energy-saving technical scheme of traditional shaft kiln cement and wet process rotary kiln manufacture of cement, for improving the burn-ability of grog and burning till quality, reduce and burn till energy consumption, extensively adopt grog seed technology, in raw material, namely add the mineral crystal seed of grog as clinker burning.
On this basis, we are through repeatedly verifying: one, hydrosilicate mineral after hydrated cementitious solidification are allocated in raw material also to have and are allocated the same grog crystal seed effect of grog into, namely product---hydrosilicate mineral can as grog crystal seed presoma in aquation generation, grog crystal seed presoma decomposes and dehydration become anhydrous silicate mineral, calcine together with raw material and namely become effective grog crystal seed mineral, they are two years old, grog crystal seed is allocated into or grog crystal seed presoma can improve grog burn-ability equally significantly in dry-process rotary kiln raw material, reduce and burn till energy consumption, key to have the inexpensive grog crystal seed mineral or grog crystal seed presoma that can mix---because enterprise thinks that in psychological value dry-process rotary kiln portland cement clinker cost is high, and the quantity of the grog crystal seed of the grog size of capacity very greatly needed for it is large.
Chinese patent application 200910102069.4 discloses a kind of method utilizing cement mill smoke residual heat to dry sludge and firing sludge cement, cement mill fume afterheat is utilized to carry out two-section type sludge drying, first by the mud ageing 3 ~ 5 days of water content after mechanical dehydration 75 ~ 85% and with after turning over mixed machine pre-treatment, then Bian the first sludge drying granulating apparatus is tentatively dried, sludge water content is down to 56 ~ 63%, send into the second sludge drying granulating apparatus again to dry further, rely on the hot gas flow in drying unit and chain, hammering device by sludge drying to the mud granule of water ratio 40.45% particle diameter 1 ~ 8mm, again this mud granule is cooled, further dehydration is to the Wu Ni Teeth grain of water ratio 15 ~ 30%, then mud granule 30 ~ 50% is mixed with clayey raw material, form mud-clayey compound, again using this compound as ordinary Portland cement raw meal proportioning.This utilizes the furnace drying method complex process of dehydrated sludge, facility investment large, runs power consumption high, and there is obvious secondary pollution hidden danger.Although, by reducing the ratio impact of kiln condition and yield and quality being defined to dewatered sludge, burning till still without active indemnifying measure grog.
Chinese patent application 200710045299.2 discloses the obtained cement clinker of a kind of Bian dewatered sludge ingredient and production method thereof, utilize a small amount of (2.3%) dewatered drying mud (moisture content 30 ~ 40%), and particular types raw material---slag, flyash, sandstone and calcareous raw material raw meal prepared from lime, produce grog.This method can only dry mud on a small quantity, and needs to adopt specific slag raw material (containing Calucium Silicate powder mineral in slag) etc., cannot realize economy, dissolve mud to mass-producing.
Chinese patent application 201410279157.2 discloses a kind of method that industrial residue mud produces cement cementitious material, directly mud and the chloride industrial caustic of height are added water mixing, add water balling-up, grinds the method for cement cementitious material after 300 DEG C ~ 500 DEG C oven dry roastings.The method is not suitable for existing normal dry-process rotary kiln technique, and its cement can not be used for reinforced concrete work.
Chinese patent application 201410278336.4 discloses a kind of method that mud makes cement clinker, with the mud after dehydrating mix with silicon lime-ash and zeolite cream, add water balling-up, through 300 ~ 500 DEG C dry roastings be the method for cement clinker.The method is not suitable for existing normal dry-process rotary kiln technique, and silicon lime-ash limited source---silicon ash according to the different price of quality be 600 ~ 2800 yuan/t not etc., far above cement.
Obviously, existing technology do not provide effectively, the method for economic, easy extensive mud of dissolving.Prior art does not provide a kind of yet and can synchronous mass-producing to dissolve large waste residue such as mud, industrial waste gypsum, and the method for effective production belite economically-gypsum novel material.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiencies in the prior art, for a kind of low grinding energy, lowly burns till energy consumption, the dry-process rotary kiln mud of low cost, the method for waste gypsum production belite-gypsum material.
The technical scheme that the present invention solves the employing of its technical problem is that a kind of method of dry-process rotary kiln mud, waste gypsum production belite-gypsum material, comprises the following steps:
(1) high-moisture-contensludge sludge ridge grain crystal seed is turned to modified sewage sludge slag;
High-moisture-contensludge sludge is pumped in ridge tank, with continuous stirring hydrophilic low hydratability can be excited and promotor that interfacial effect affects adds in mud, with 10 revs/min ~ 300 revs/min (preferably 50 revs/min ~ 200 revs/min with having to activate in the ridge crystal seed agent of hydration and hardening; More preferably 80 revs/min ~ 150 revs/min) rotating speed continuously stirring 0.6 ~ 6.0 hour (preferred 1-4 hour, more preferably 1.5-2.5 hour) carry out ridge grain seeding, refilter and carry out solid-liquid separation, obtain modified sewage sludge slag and filtrate;
(2) by step (1) gained modified sewage sludge slag and waste gypsum, barren rock slag and correct material and carry out raw meal proportioning, make raw meal powder with raw material vertical-grinding grinding, raw meal powder fineness controls to tail over 10 ~ 40% at 0.08mm;
The mass percent of described raw meal proportioning is: modified sewage sludge slag 15 ~ 50%, waste gypsum 15 ~ 50%, Wingdale 20 ~ 50%, correction material 0 ~ 15%;
(3) by step (2) gained raw meal powder, send into dry-process rotary kiln system, control coefficient of excess air > 15%, the Bian dry-process rotary kiln calcining process of kiln internal oxidition atmosphere, in 1250 DEG C ~ 1400 DEG C calcinings 15 ~ 60 minutes, be grog by described raw meal powder calcining;
(4) allocate step (3) gained grog into 0 ~ 100% fusion material, or allocate 0 ~ 40% anhydrite and 0 ~ 60% fusion material into, grinding makes the powder that fineness 0.08mm tails over < 20%.
Further, in step (1), described hydrophilic low hydratability and can the ridge crystal seed agent of hydration and hardening be cement flour and/or chamotte powder.
Further, step (1) can be omitted, and directly uses the outer modified sewage sludge slag sent here.
Further, in step (2), described waste gypsum is at least one in phosphogypsum, desulfurated plaster, fluorgypsum, gypsum mine waste residue, gypsum mold.
Further, in step (2), described barren rock slag is limestone mine barren rock slag or lime mud or waste limestone aggregate concrete.Can part or all of Wingdale or carbide slag substitute.
Further, in step (2), described correction material is alumina or high-alumina clay or high aluminium waste slag.One or several of described high waste slag of aluminum is high alumina spoil, high alumina coal ash, high alumina give up brick etc.
Further, step (4), or separate compiling remix is even;
Further, in step (1), the add-on of described ridge crystal seed agent is 0.3 ~ 5.5% of high-moisture-contensludge sludge quality, and the add-on of described promotor is 1/2 of ridge crystal seed agent add-on.
Described high-moisture-contensludge sludge is the primary mud of municipal water treatment or pond, lake, river course settled sludge.
Described modified sewage sludge slag can substitute with the mud of ageing solidification, and the mud of described ageing solidification preferably stores up the ageing solidification sludge of more than 3 months.Substitute modified sewage sludge slag with the mud of ageing solidification, owing to there is not ridge modification problem, therefore, save step (1), all the other steps, the two is identical.
Belite-gypsum plaster that the present invention is obtained, the novel gelled material of to be a kind of main component be beta-dicalcium silicate-calcium sulphoaluminate-calcium sulfate, have that early strength is high, sclerosis is fast, basicity is low, swell value from microdilatancy to the adjustable controlled feature of expansion, and cost is low.By suitably adjusting feed composition proportioning, can direct production belite-gypsum special cement, micro expansion compensation shrinkage cement, GRC goods low alkali cement, sulphate-resistant cement, also can adapted fusion material and anhydrite and Additive Production swelling agent, ground self-leveling gypsum and build ash, mortar and production building material product etc. by laying bricks or stones, also can sell directly outer for grog general purpose portland cement manufacturing concern and be used for the alternative plaster of paris and part portland cement clinker.
Know-why of the present invention:
1) dry-process rotary kiln process characteristic and resources advantage is utilized, be used for dry-process rotary kiln with mud and industrial waste gypsum and produce broad-spectrum belite-gypsum material for target, it is the ridge particulate matter containing a large amount of grog crystal seed presoma mineral by sludge modification, raw meal proportioning is carried out together with waste gypsum etc., both the stable conditions of Vertical Mill and efficient grinding problem had been solved, can significantly reduce raw grinding energy consumption, burn-ability concrete in dry-process rotary kilns production can be solved again, firer's condition, high yield and low heat dissipation and desulfurization, the practical problemss such as denitration, and the grindability of the porous clinker of speed burning is fabulous, can significantly reduce cement grinding energy consumption, reach and to dissolve mud and industrial waste gypsum with the environmental protection mode mass-producing of energy-saving and emission-reduction.
2) for the hyperhydrated ability of the solid formation flocculation colloidizing of the clay class in mud, vegetable fibre class, thing and the organic compound etc. of supporting one's family formation, can the ridge crystal seed agent of hydration and hardening to excite and the synergy of promotor that interfacial effect affects with having to activate with hydrophilic low hydratability, destroy the strong water-retentivity micelle of mud, and interact and sandization and the solid formation in fibrosis mud, make it to be converted into the particulate matter producing and have a large amount of hydrosilicate mineral, and be easy to realize dehydration separation, and the filter residue be separated is easy to natural air drying.
3) modification ridge is utilized to turn to the method for mud fine particle, change composition and the characteristic of mud on the one hand, make it to be convenient to batching to use, and the siliceous raw material very easily generating belite mineral is provided, on the other hand, utilize the hydrosilicate mineral of modified sewage sludge as grog crystal seed presoma, both improve the burn-ability of grog, and made it to match with the generation of calcium sulphoaluminate and crystal growth, stablize firer's condition, be beneficial to high temperature speed firing technique, significantly reduce sinter leaching energy consumption.
4) a large amount of alkaline water compounds of the low hydrauture utilizing the ridge grain seeding effect of mud to produce remove the acid SO in raw material vertical-grinding and dry-process rotary kiln pre-heating system in flue gas
2.
5) utilize the agent of wetting ability low hydrauture ridge crystal seed for the inorganics in principal phase mutual effect sclerosis recovery mud and combustable organic thing, inorganics in mud is all utilized and forms grog crystal seed presoma as the main siliceous raw material generating belite mineral, simultaneously, combustable organic thing in mud is also in company with entering raw material, entering in the process of decomposing furnace internal oxidition after-flame with raw material through preheater, organic moiety substitutes ammoniacal liquor or the urea element of denitration, both make use of combustable organic thing in mud, denitration expense can have been reduced again.
Beneficial effect of the present invention:
1) processing method is simple, and it is low that Charge Mixture Control requires relative dry-process rotary kiln to produce portland cement clinker, utilizes dry-process rotary kiln investment in technological upgrading little, mud and industrial waste gypsum treatment capacity large.
2) dry-process rotary kiln enterprise utilizes mud, waste gypsum produces broad-spectrum belite-gypsum material, the cost of material is low for it, grinding pow consumption is low, it is low to burn till energy consumption, and fast firing technique production capacity is high, also can save desulfurization and denitration cost, be easily the acceptance of dry-process rotary kiln enterprise, the recycling for mud and waste gypsum provides the outlet of practicable.
3) both mass-producing, resource utilization can to dissolve mud and waste gypsum, again without other secondary pollution, also can save a large amount of energy consumption, alleviate environmental pollution, be beneficial to environmental protection.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
The following stated embodiment is all being carried out on φ 3 × 46m dry-process rotary kiln production line.
Embodiment 1
(1) primary for sewage work mud is carried out the modification of ridge grain seeding, detect moisture percentage in sewage sludge 99%, butt solid formation content 1%; Ridge crystal seed agent cement flour, cement flour consumption is mud 4Kg per ton, the ZC-D1 type pulvis activation modification promotor that promotor selects Changsha Zi Chen Science and Technology Development Co., Ltd. to develop, and consumption is 50% of ridge crystal seed agent quality, i.e. mud 2Kg per ton.
Mud is pumped in ridge tank, according to the above ratio cement and promotor powder are directly added in mud with continuous stirring, with 120 revs/min of continuously stirring 2 hours, carry out the process of ridge grain seeding, then the mud mixture put up with through the process of ridge grain seeding pumps into chamber-type press filter press filtration, carries out solid-liquid separation, obtains modified sewage sludge slag, filtrate is clear water, detects filter residue water ratio 34.6%.
(2) the modified sludge residue in feed ingredients with phosphorus gypsum, limestone, correction, the correction choose aluminous material, proportion is: sludge residue in 41.7% 30.3%, 30.3% 30.3% phosphorus gypsum, limestone, bauxite, into vertical mill grinding materials, stable working condition of grinding, grinding raw meal fineness control 18 ~ 22% more than 0.08 mm sieve, mill capacity compared with grinding Portland cement raw meal with 72 tons to 103 tons, raw meal grinding capacity increased by 43% on average, namely tons of a 43% drop in consumption of raw material grinding.
(3) above-mentioned raw meal powder is sent into dry-process rotary kiln system through 1 ~ 4 grade of preheater, decomposing furnace, 5 grades of preheater preheats, decomposition, reenter calcined by rotary kiln, calcining temperature 1250 DEG C ~ 1350 DEG C, in kiln, high temperature section about 20 minutes, calcines as grog; The 43t/h that kiln system production capacity comparatively fires normal silicate grog is increased to 60.94t/h, kiln system production capacity on average improves 41.7%, 86.7kg is down in the coal consumption of ton grog mark, and comparatively firing silicate grog 121Kg marks coal consumption reduction by 28.3%, and sulphur emissions on-line checkingi is by original 510ug/Nm
3left and right is reduced to 170ug/Nm
3left and right is up to standard, and denitration ammoniacal liquor stops detecting still up to standard for seasonable online oxynitrides.
(4) the direct grinding of above-mentioned skillful material is made the powder that fineness 0.08mm tails over 3 ~ 5%, namely make belite-gypsum plaster.Detect this gelling material consumptive use of water normal consistence 21.2%, 51 minutes presetting periods, final setting time 62 minutes, 3 days folding strength 4.1MPa, ultimate compression strength 26.7MPa, 7 days folding strength 4.6MPa, ultimate compression strength 36.2MPa, 28 days folding strength 5.4MPa, ultimate compression strength 46.3MPa, pH value 10.4, degree of free swelling 0.08%.
Embodiment 2
(1) primary for sewage work mud is carried out the modification of ridge grain seeding, detect moisture percentage in sewage sludge 98.2%, butt solid formation content 1.8%.Ridge crystal seed agent cement flour, cement flour consumption is mud 9Kg per ton, the ZC-D2 type pulvis activation modification promotor that promotor selects Changsha Zi Chen Science and Technology Development Co., Ltd. to develop, and consumption is 50% of ridge crystal seed agent mass ratio, i.e. mud 4.5Kg per ton.
Mud is pumped in ridge tank, according to the above ratio cement and promotor powder are directly added in mud with continuous stirring, ridge grain seeding within 2 hours, is carried out with 90 revs/min of continuously stirring mud mixtures, mud mixture through the process of ridge grain seeding is pumped into chamber-type press filter press filtration, carry out solid-liquid separation, obtain modified sewage sludge slag, filtrate is clear water, detect filter residue water ratio 31.9%, filter residue natural air drying 2 days detection water ratio are down to 13% and are delivered to sandstone raw material place batching.
(2) the modified sludge slag and phosphogypsum, stone ash, correction of material ingredient, correction choose aluminous material, the ratio of mass percent: 16%, 32% phosphorus gypsum, sludge slag stone ash 47%, alumina 5%, into vertical mill grinding materials, stable working condition of grinding, grinding raw meal fineness control 18 ~ 22% more than 0.08 mm sieve, mill capacity compared with grinding Portland cement raw meal with 72 tons to 87 tons, raw meal grinding capacity increased by 20.8% on average, namely tons of a 20.8% drop in consumption of raw material grinding.
(3) above-mentioned raw meal powder is sent into dry-process rotary kiln system and enter calcined by rotary kiln through 1 ~ 4 grade of preheater, decomposing furnace, 5 grades of preheaters, calcining temperature 1300 DEG C ~ 1400 DEG C, in kiln, high temperature section about 20 minutes, calcines as grog.Kiln system production capacity is comparatively fired normal silicate grog and is on average improved 29.7%, and 91.3kg is down in the coal consumption of ton grog mark, and comparatively firing silicate grog 121Kg marks coal consumption reduction by 24.5%, and sulphur emissions on-line checkingi is by original 510ug/Nm
3left and right is reduced to 180ug/Nm
3left and right is up to standard, and denitration ammoniacal liquor stops detecting still up to standard for seasonable online oxynitrides.
(4) the direct grinding of above-mentioned skillful material is made the powder that fineness 0.08mm tails over 2 ~ 3%, namely make belite-gypsum plaster.Detect this gelling material consumptive use of water normal consistence 21.9%, 41 minutes presetting periods, final setting time 53 minutes, 3 days anti-folding 4.1MPa, resistance to compression 29.6MPa, 7 days anti-folding 4.9MPa, resistance to compression 37.5MPa, 28 days anti-folding 6.1MPa, resistance to compression 54.9MPa, pH value 10.2, degree of free swelling 0.1%.
Allocate into described grog and be equivalent to the fluorgypsum of clinker quality 30% and the slag of 20%, grinding makes the powder that fineness 0.08mm tails over 3 ~ 5%, namely makes belite-gypsum plaster.Detect this gelling material, consumptive use of water normal consistence 20.7%, 58 minutes presetting periods, final setting time 71 minutes, 3 days folding strength 3.9MPa, ultimate compression strength 24.7MPa, 7 days folding strength 4.3MPa, ultimate compression strength 34.9MPa, 28 days folding strength 4.5MPa, ultimate compression strength 43.5MPa, pH value 10.1, degree of free swelling 0.18%.Under substituting the equal volume of commercially available swelling agent (9 ~ 12% of cement consumption) condition with this belite-gypsum plaster as swelling agent, swell value is suitable, and the concrete that mechanical property ultimate compression strength comparatively mixes commercially available swelling agent improves 7%.
Embodiment 3
(1) county town ditch cleaning mud is carried out the modification of ridge grain seeding, detect moisture percentage in sewage sludge 78.3%, butt solid formation content 21.7%.Ridge crystal seed agent cement flour, cement flour consumption is mud 50Kg per ton, the ZC-D3 type pulvis activation modification promotor that promotor selects Changsha Zi Chen Science and Technology Development Co., Ltd. to develop, consumption is 50% of ridge crystal seed agent cement flour add-on, i.e. mud 25Kg per ton.
Mud ram pump is pumped in ridge tank, with continuous stirring, according to the above ratio cement and promotor powder are directly added in mud, with 90 revs/min of continuously stirring 3 hours, carry out the process of ridge grain seeding, then the mud mixture through the process of ridge grain seeding is pumped into chamber-type press filter press filtration, carry out solid-liquid separation, obtain modified sewage sludge slag, filtrate is clear water, detects, modified sewage sludge slag water ratio 31.4%, natural air drying 2 days, detects water ratio and is down to 12%, delivers to sandstone raw material place batching.
(2) the modified sludge residue feed ingredients with phosphorus gypsum, limestone, correction, the correction for bauxite, ratio is: the modified sludge residue 28% 40%, 40% 40% phosphorus gypsum, limestone, bauxite, the raw into vertical mill grinding, stable working condition of grinding, grinding raw meal fineness control 18 ~ 22% more than 0.08 mm sieve, mill capacity compared with grinding Portland cement raw meal with 72 tons to 88 tons, raw meal grinding capacity increased by 22.2% on average, namely tons of a 22.2% drop in consumption of raw material grinding.
(3) above-mentioned raw meal powder is sent into dry-process rotary kiln system and enter calcined by rotary kiln through 1 ~ 4 grade of preheater, decomposing furnace, 5 grades of preheaters, calcining temperature 1300 DEG C ~ 1400 DEG C, in kiln, high temperature section about 20 minutes, calcines as grog.Kiln system production capacity is comparatively fired normal silicate grog and is on average improved 31.7%, and 90.1kg is down in the coal consumption of ton grog mark, and comparatively firing silicate grog 121Kg marks coal consumption reduction by 25.4%, and sulphur emissions on-line checkingi is by original 510ug/Nm
3left and right is reduced to 190ug/Nm
3left and right is up to standard, and denitration ammoniacal liquor stops detecting still up to standard for seasonable online oxynitrides.
(4) the direct grinding of above-mentioned skillful material is made the powder that fineness 0.08mm tails over 2 ~ 3%, namely make belite-gypsum plaster.Detect this gelling material consumptive use of water normal consistence 21.6%, 63 minutes presetting periods, final setting time 73 minutes, 3 days folding strength 3.7MPa, ultimate compression strength 23.8MPa, 7 days folding strength 4.0MPa, ultimate compression strength 37.1MPa, 28 days folding strength 4.8MPa, ultimate compression strength 44.9MPa, pH value 10.2, degree of free swelling 0.09%.
Embodiment 4
(1) sewage work's dewatered sludge is carried out the modification of ridge grain seeding, detect moisture percentage in sewage sludge 83%, butt solid formation content 17%.Ridge crystal seed agent cement flour, cement flour consumption is mud 35Kg per ton, the ZC-D3 type pulvis activation modification promotor that promotor selects Changsha Zi Chen Science and Technology Development Co., Ltd. to develop, consumption is 50% of ridge crystal seed agent mass ratio, i.e. mud 17.5Kg per ton.
Mud is pumped in ridge tank, according to the above ratio cement and promotor powder are directly added in mud with continuous stirring, with 120 revs/min of continuously stirring 3 hours, carry out the process of ridge grain seeding, then the mud mixture through the process of ridge grain seeding is pumped into chamber-type press filter press filtration and carry out solid-liquid separation, obtain modified sewage sludge slag, filtrate is clear water, detects filter residue water ratio 32.1%.
(2) the modified sludge residue in feed ingredients with phosphorus gypsum, limestone, correction, the correction choose aluminous material, proportion is: sludge residue in 20% 20%, 20% 20% phosphorus gypsum, limestone, bauxite, into vertical mill grinding materials, stable working condition of grinding, grinding raw meal fineness control 18 ~ 22% more than 0.08 mm sieve, mill capacity compared with grinding Portland cement raw meal with 72 tons to 91 tons, raw meal grinding capacity increased by 26.4% on average, namely tons of a 26.4% drop in consumption of raw material grinding.
(3) above-mentioned raw meal powder is sent into dry-process rotary kiln system and enter calcined by rotary kiln through 1 ~ 4 grade of preheater, decomposing furnace, 5 grades of preheaters, calcining temperature 1350 DEG C ~ 1400 DEG C, in kiln, high temperature section about 20 minutes, calcines as grog.The 43t/h that kiln system production capacity comparatively fires normal silicate grog is increased to 56t/h, kiln system production capacity on average improves 30.2%, 94.7kg is down in the coal consumption of ton grog mark, and comparatively firing silicate grog 121Kg marks coal consumption reduction by 21.7%, and sulphur emissions on-line checkingi is by original 510ug/Nm
3left and right is reduced to 190ug/Nm
3left and right is up to standard, and denitration ammoniacal liquor stops detecting still up to standard for seasonable online oxynitrides.
(4) the direct grinding of above-mentioned skillful material is made the powder that fineness 0.08mm tails over 3 ~ 5%, namely make belite-gypsum plaster.Detect this gelling material consumptive use of water normal consistence 22%, 38 minutes presetting periods, final setting time 49 minutes, 3 days folding strength 4.1MPa, ultimate compression strength 30.7MPa, 7 days folding strength 4.9MPa, ultimate compression strength 39.2MPa, 28 days folding strength 6.4MPa, ultimate compression strength 56.4MPa, pH value 10.3, degree of free swelling 0.09%.
Embodiment 5
(1) primary for sewage work mud is carried out the modification of ridge grain seeding, detect moisture percentage in sewage sludge 98.4%, butt solid formation content 1.6%.Ridge crystal seed agent cement flour, cement flour consumption is mud 8Kg per ton, the ZC-D1 type pulvis activation modification promotor that promotor selects Changsha Zi Chen Science and Technology Development Co., Ltd. to develop, and consumption is 50% of ridge crystal seed agent mass ratio, i.e. mud 4Kg per ton.
Mud is pumped in ridge tank, according to the above ratio cement and promotor powder are directly added in mud with continuous stirring, with 120 revs/min of continuously stirring 2 hours, carry out the process of ridge grain seeding, then the mud mixture through the process of ridge grain seeding is pumped into chamber-type press filter press filtration, carry out solid-liquid separation, obtain modified sewage sludge slag, filtrate is clear water, detects filter residue water ratio 28.9%.
(2) the modified sludge residue feed ingredients with phosphorus gypsum, limestone, correction, the correction choose aluminous material, ratio is: the modified sludge residue 40% 30%, 30% 30% phosphorus gypsum, limestone, bauxite, the raw into vertical mill grinding, stable working condition of grinding, grinding raw meal fineness control 18 ~ 22% more than 0.08 mm sieve, mill capacity compared with grinding Portland cement raw meal with 72 tons to 101 tons, raw meal grinding capacity increased by 40.3% on average, namely tons of a 40.3% drop in consumption of raw material grinding.
(3) above-mentioned raw meal powder is sent into dry-process rotary kiln system and enter calcined by rotary kiln through 1 ~ 4 grade of preheater, decomposing furnace, 5 grades of preheaters, calcining temperature 1350 DEG C ~ 1400 DEG C, in kiln, high temperature section about 20 minutes, calcines as grog.The 43t/h that kiln system production capacity comparatively fires normal silicate grog is increased to 59t/h, kiln system production capacity on average improves 37.2%, 86kg is down in the coal consumption of ton grog mark, and comparatively firing silicate grog 121Kg marks coal consumption reduction by 28.9%, and sulphur emissions on-line checkingi is by original 510ug/Nm
3left and right is reduced to 170ug/Nm
3left and right is up to standard, and denitration ammoniacal liquor stops detecting still up to standard for seasonable online oxynitrides.
(4) the direct grinding of above-mentioned skillful material is made the powder that fineness 0.08mm tails over 3 ~ 5%, namely make belite-gypsum plaster.Detect this gelling material consumptive use of water normal consistence 21.9%, 48 minutes presetting periods, final setting time 59 minutes, 3 days folding strength 4.1MPa, ultimate compression strength 28.7MPa, 7 days folding strength 4.6MPa, ultimate compression strength 38.2MPa, 28 days folding strength 5.2MPa, ultimate compression strength 49.3MPa, pH value 10.4, degree of free swelling 0.1%.
Claims (10)
1. a method for dry-process rotary kiln mud, waste gypsum production belite-gypsum material, is characterized in that, comprise the following steps:
(1) high-moisture-contensludge sludge ridge grain crystal seed is turned to modified sewage sludge slag:
High-moisture-contensludge sludge is pumped in ridge tank, with continuous stirring hydrophilic low hydratability can be excited and promotor that interfacial effect affects adds in described mud with having to activate in the ridge crystal seed agent of hydration and hardening, ridge grain seeding within 0.5 ~ 6.0 hour, is carried out with the rotating speed continuously stirring of 10 ~ 300 revs/min, solid-liquid separation is carried out in filtration, obtains solid state modification sludge silt and filtrate;
(2) step (1) gained modified sewage sludge slag and waste gypsum, barren rock slag and correcting is expected, by percent mass proportioning be modified sewage sludge slag 15 ~ 50%, waste gypsum 15 ~ 50%, barren rock slag 20 ~ 50%, correct material 0 ~ 15% carry out raw meal proportioning, make raw meal powder with raw material vertical-grinding grinding, raw meal powder fineness controls to tail over 10 ~ 40% at 0.08mm;
(3) step (2) gained raw meal powder being sent into dry-process rotary kiln system, control the coefficient of excess air > 15% of kiln internal oxidition atmosphere, in 1250 DEG C ~ 1400 DEG C calcinings 15 ~ 60 minutes, is grog by raw meal powder calcining;
(4) step (3) gained grog is allocated into the fusion material being equivalent to clinker weight 0 ~ 100%, or allocate the fusion material of anhydrite and 0 ~ 60% being equivalent to chamotte powder weight 0 ~ 40% into, grinding makes the powder that fineness 0.08mm tails over < 20%.
2. the method for dry-process rotary kiln mud as claimed in claim 1, waste gypsum production belite-gypsum material, is characterized in that, in step (1), and described hydrophilic low hydratability and can the ridge crystal seed agent of hydration and hardening be cement flour.
3. the method for dry-process rotary kiln mud as claimed in claim 1, waste gypsum production belite-gypsum material, is characterized in that, in step (1), for step (2) after gained modified sewage sludge filter residue natural air drying.
4. as the method for the dry-process rotary kiln mud in claims 1 to 3 as described in any one, waste gypsum production belite-gypsum material, it is characterized in that, described correction material is alumina, high-alumina clay or high waste slag of aluminum.
5. as the method for the dry-process rotary kiln mud in claims 1 to 3 as described in any one, waste gypsum production belite-gypsum material, it is characterized in that, described barren rock slag is the waste lime mud of considering to be worth doing containing mudstone of exploitation limestone mine or calcined lime or discarded limestone aggregate concrete.
6. as the method for the dry-process rotary kiln mud in claims 1 to 3 as described in any one, waste gypsum production belite-gypsum material, it is characterized in that, described waste gypsum is at least one in phosphogypsum, desulfurated plaster, fluorgypsum, gypsum mine waste, waste gypsum mould.
7. as the method for the dry-process rotary kiln mud in claims 1 to 3 as described in any one, waste gypsum production belite-gypsum material, it is characterized in that, described raw meal powder sends into dry-process rotary kiln system through 1 ~ 4 grade of preheater, decomposing furnace, 5 grades of preheater preheats Sum decomposition, reenters calcined by rotary kiln.
8. the method for dry-process rotary kiln mud as claimed in claim 1, waste gypsum production belite-gypsum material, it is characterized in that: step (4), grog, anhydrite and fusion material are mixed together and carry out grinding, make the powder that fineness 0.08mm tails over < 20%; Or grog, anhydrite, fusion material are carried out grinding respectively, make the powder that fineness 0.08mm tails over < 20%, remix is finished product.
9. the method for dry-process rotary kiln mud as claimed in claim 1, waste gypsum production belite-gypsum material, is characterized in that: described barren rock slag, partly or entirely substitutes with Wingdale or carbide slag.
10. a method for dry-process rotary kiln mud, waste gypsum production belite-gypsum material, is characterized in that, comprise the following steps:
(1) mud of the solidification of ageing and waste gypsum, barren rock slag and correcting is expected, by the solidification sludge 15 ~ 50% that percent mass proportioning is ageing, waste gypsum 150 ~ 50%, barren rock slag 20 ~ 50%, correct material 0 ~ 15% and carry out raw meal proportioning, make raw meal powder with raw material vertical-grinding grinding, raw meal powder fineness controls to tail over 10 ~ 40% at 0.08mm;
(2) step (1) gained raw meal powder being sent into dry-process rotary kiln system, control the coefficient of excess air > 15% of kiln internal oxidition atmosphere, in 1250 DEG C ~ 1400 DEG C calcinings 15 ~ 60 minutes, is grog by raw meal powder calcining;
(3) step (2) gained grog is allocated into the fusion material being equivalent to clinker weight 0 ~ 100%, or allocate the fusion material of anhydrite and 0 ~ 60% being equivalent to chamotte powder weight 0 ~ 40% into, grinding makes the powder that fineness 0.08mm tails over < 20%.
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Effective date of registration: 20161214 Address after: 410205 Hunan city high tech Development Zone Changsha Changsha Wenxuan Road No. 27 Lu Valley Yuyuan D3-101 building two floor Patentee after: CHANGSHA ZICHEN TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 410013 Hunan province high tech Development Zone C2 group Binjiang fortune Silicon Valley building, room 5, building 510, room Patentee before: Yin Xiaolin |