CN102351444B - Method for producing high grade cement clinker from full waste residues through rapidly calcining at low temperature - Google Patents
Method for producing high grade cement clinker from full waste residues through rapidly calcining at low temperature Download PDFInfo
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- 239000002699 waste material Substances 0.000 title claims abstract description 39
- 238000001354 calcination Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 42
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- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims abstract description 16
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- 239000007789 gas Substances 0.000 claims description 8
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- 239000004566 building material Substances 0.000 abstract description 2
- 238000000227 grinding Methods 0.000 abstract description 2
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- 239000010703 silicon Substances 0.000 abstract description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
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- 238000002156 mixing Methods 0.000 abstract 1
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- 239000000126 substance Substances 0.000 description 8
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 6
- 239000004800 polyvinyl chloride Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 210000004884 grey matter Anatomy 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
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- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
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- 238000010671 solid-state reaction Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
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- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 239000002989 correction material Substances 0.000 description 1
- 229910002026 crystalline silica Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007592 spray painting technique Methods 0.000 description 1
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Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention which relates to a method for producing high grade cement clinker from full waste residues through rapidly calcining at a low temperature belongs to the building material field. The method comprises the following steps: mixing gangue, slag, sulfuric acid slag, calcium carbide condensed ash, limestone slag and lime slag according to a weigh ratio, sending them to a drying and medium-discharging mill, grinding into fine powder, sending the fine powder together with coal ash to a powder concentrator, allowing the fine powder and the coal ash to enter a drying tube for being mixed with calcium carbide slag, drying above waste residues in the drying tube, allowing the waste residues to enter a raw material homogenizing storage, sending the waste residues to an uptake flue of a second-stage preheater, allowing raw materials (the waste residues) to enter a first-stage cyclone after preheating, allowing the collected raw materials to fall into an uptake flue of a third-stage cyclone from a first-stage cyclone and enter a second-stage cyclone after heat exchange, and sending a separated solid phase to a decomposing furnace, sending the solid phase to the third-stage cyclone after decomposition, carrying out gas-solid separation, calcining the solid phase which falls into a smoke chamber, and sending the solid phase to a rotary kiln, and further calcining the solid phase to generate raw cement. The method which adopts the waste residues as ingredients and allows the limestone slag with the heat absorption function to be added and a silicon raw material to be removed has the advantages of full reduction of the reaction temperature, solution of a problem of exhaust-heat boiler crust, and calcining time shortening.
Description
Technical field:
The invention belongs to building materials field, relate to a kind of cement clinker production, relate in particular to a kind of full waste residue low temperature and sharply calcine cement of high index grog method.
Background technology
generated by polyvinyl chloride by calcium carbide technique is mainly by water and calcium carbide reaction, produce acetylene gas, acetylene have " organic chemical industry's mother " laudatory title, it is one of most basic raw material of Organic chemical products in the world at present, but generated by polyvinyl chloride by calcium carbide production process, one ton of PVC of every production will produce 1.6 tons of carbide slags, produce simultaneously 25 tons of carbide slag slurries, expect the end of the year in 2011, China's generated by polyvinyl chloride by calcium carbide output will break through 1,000 ten thousand tons, to produce calcium carbide waste slag more than 1,600 ten thousand tons every year, produce simultaneously 2.5 hundred million tons of carbide slag slurries, process by traditional landfill method, not only need increase the huge investment that the carbide slag transportation is buried, the more important thing is to cause environment and seriously influence.
In outdoor stacking, the wastewater from acetylene slag of formation is strong basicity, high suspended matter waste water to carbide slag, also contains simultaneously the hazardous and noxious substances such as sulfide as for a long time, and many index is violated discharging standards.After direct discharging of waste water, wherein suspended substance produces precipitation in course of conveying, can cause line clogging, directly causes the riverbed to silt up.
Acetylene sludge wastewater PH is 12-14, and sulfides from wastewater exceeds standard, and changes but work as environment water PH, when being neutrality or subacidity, will cause a large amount of hydrogen sulfide to escape.Sulfide enters behind the river course dissolved oxygen reacting generating salt under bacterium participates in and in river in addition, exhausts dissolved oxygens a large amount of in water, causes the hydrocoles mortality, and the water body blackout is smelly.Carbide slag is stacked and to be taken a large amount of soils in addition, piles up seriously to land invasion for a long time, and the carbide slag water ratio surpasses more than 50%, is starchiness, and easy to leak pollutes the road surface in transit.
So generated by polyvinyl chloride by calcium carbide will develop, must solve this difficult problem around the industry development sound development of a large amount of waste residues that produces in production process, this is the key of generated by polyvinyl chloride by calcium carbide industry Sustainable development.The drying acetylene technology is the Novel ethyne generation technique that progressively develops in recent years, and its reaction water loss is only 20% left and right of wet method acetylene, the carbide slag of generation moisture 5% left and right, and the generation of having stopped carbide slag slurries, water-saving result is remarkable.Simultaneously, because the carbide slag water ratio that produces is low, for development carbide slag new type nonaqueous cement technology provides condition, many research and development institutions and enterprise have carried out concentrated research and development and have captured its gordian technique in succession.
A kind of dry discharging carbide slag slag 100% that discloses of Chinese patent 200810072854.5 substitutes natural stone grey matter raw material for producing cement chamotte processing method, take carbide slag as main raw material, adopt precalcining to produce the method for cement clinker, its proportioning raw materials is that carbide slag 71.8-77.8%, sandstone are 8%-12%, sulfate slag 1.5-2.5%, flyash 11.2-15.2%, the method substitutes natural stone grey matter raw material for producing cement chamotte with carbide slag 100% and has solved the few problem of carbide slag consumption, and a large amount of pollution waste residues is turned waste into wealth.But in the method, carbide slag is the elaboration calcareous raw material of producing cement clinker, can produce a series of calcareous waste residues such as lime rock ballast, lime mud, calcium carbide collected ash in the carbide slag generative process, and collocation is not disposed, and also can cause certain environment to pollute; Secondly, be high silicon ingredient during sandstone 8%-12%, due to sandstone crystallization SiO
2Difficult tribulation is burnt, and the power consumption coal consumption is high, and Yield and quality will reduce, and causes chemical matching problem to calcining process; Three, the method formula can cause preheater outlet spent air temperture high in process of production, causes system's skinning, and fault is many.
As everyone knows, carbide slag 100% substitutes natural stone grey matter raw material for producing cement chamotte and produces solid state reaction at preheater, 850 ℃ of decomposing furnace temperature of lower, 960 ℃ of upper temps, going out 930 ℃ of materials of three grades of preheaters, to rise Warm fast, liquid phase occurs early, there has been grog to burn till three grades of ingress, frequent jams tremie pipe and preheater, 750 ℃ of secondary temperature outs, one-level heater outlet temperature cause calcium hydroxide to decompose fast at 680 ℃, make the one-level preheater produce 22% calcium carbonate reversed reaction, 1.5%CaCO is arranged
3Reversed reaction enters high-temperature blower and adheres to blade, causes the blower fan vibrations large, and bearing heats up high, can't run well.Secondly, the siliceous raw material sandstone is crystalline silica, goes out just can transfer chemical combination SiO to after decomposing furnace enters kiln
2A large amount of calcium oxide do not have corresponding many active SiO
2The reaction, can only with waste gas in CO
2Form reversed reaction, add the water vapour of chlorine, sulphur, potassium, sodium and 18%, cause the preheater Coating clogging, kiln ventilation is not smooth, and the flame retraction burns out kliner coating, kiln brick, and operation factor is low, the phenomenons such as the frequent generation of equipment failure.
The installation method of a kind of calcining cement by carbide slag replacing whole limestone that Chinese patent 200720098247.7 is announced, the feeding mouth that the import that it is characterized in that being first and second grades of cyclone preheaters connects airduct connects material distributing valve by emission of baiting chute respectively, raw material advance respectively secondary, " high-temperature calcination, middle temperature are decomposed " carried out in three grades of cyclone preheater outlets, and the method has solved the higher problem of first class outlet temperature.But have the following disadvantages, one, first class outlet temperature if adopt oven dry wet slag efficient better, adopt dried slag temperature out or high at 550 ℃, and the hear rate waste is large; Its two, carbide slag all replace the Main Function of decomposition of limestone stove be the calcining sandstone, due to the crystallization SiO in sandstone
2Be converted into chemical combination SiO
2The calcium oxide active passivation slower, that carbide slag is decomposited has to lengthen the kiln body, increases process complexity, causes equipment failure many.
Also announced a kind of method in document, Jin Yanyu etc. write utilizes waste residue low temperature calcination high grade variation grog [J] " Chinese cement " in April, 2011.It is poor that this technology has solved clinker strength, the problems such as burn-ability is bad, 680 ℃ of one-level cyclone preheater temperature outs are reduced to 600 ℃, reversed reaction reduces drying pipe suspension raw material again and absorbs, and the high-temperature blower impeller has been eliminated skinning, and clinker strength improves the 10MPa left and right, Reducing Coal Consumption, but, still to adopt 5% efflorescence sandstone batching in one, the method, cause each oxide compound to decompose, dewater, can not overlap with solid state reaction; Two, do not consider the lime rock ballast can decrease one-level cyclone temperature, it decomposes slow than carbide slag, this part calcium oxide passivation time is short in kiln and C relatively
2S is swift in response and easily forms C
3S, this part lime mud is the volume increase part, more can reduces coal consumption on the contrary; Three, also have 300 ℃ of waste heats to wet to reduce by increasing spray painting, be roughly equal to the 650kJ/kg calorific value, accounting for 24% No that burns till hear rate has utilization; Four, waste heat boiler reaches 600 ℃ and locates easy skinning.Its five, what rely in method is thermal activation and chemical activation principle, wild effect easily occurs in operation; Six, with the siliceous raw material drift-sand by weight 11% proportioning change 5% efflorescence sandstone into, rest part is replenished by slag and flyash, the decomposing furnace coal consumption significantly descends, calciner temperature is controlled and is dropped to 800 ℃-850 ℃ by 850 ℃-900 ℃, advancing three grades of preheater temperature is 870 ℃, and going out three grades of pre-actuator temperatures is 860 ℃, goes out 730 ℃ of the pre-actuator temperatures of secondary, go out 600 ℃ of the pre-actuator temperatures of one-level, wherein waste gas is by 300 ℃ of spray humidification coolings.But, not do not eradicate and spray water is mixed sticking wall often due to the high reversed reaction of temperature, reach certain thickness and smash the cone end from high falling, produce the normal production of the impact of leaking out.
In sum, solved this problem of carbide slag in existing technology, fail to solve but be used for the above-mentioned shortcoming that cement production process exists, provide a kind of stable continuously, cost is low, utilization rate of waste heat is high cement clinker production is that the sector is thirsted for the problem that solves.
Summary of the invention:
Order of the present invention is to solve waste residue in prior art and fails all to utilize, add sandstone and cause that the high impact of preheater temperature is produced, the problems of waste heat boiler skinning, and then provide a kind of low cost of manufacture, energy utilization rate is high, equipment failure is few, and the full waste residue low temperature that cement clinker strength is high is sharply calcined cement of high index grog method.
The present invention seeks to be achieved through the following technical solutions:
(1) raw material and the parts by weight of full producing cement from fag end grog are:
Carbide slag 55-75 part, calcium carbide collected ash 2-7 part, lime mud 1-10 part, lime rock ballast 5-15 part, flyash 6-10 part, slag 3-6 part, coal gangue 3-6 part, sulfate slag 2-3 part;
(2) producing and manufacturing technique is:
a kind of full waste residue low temperature is sharply calcined cement of high index grog method, comprise the steps: at first with coal gangue, slag, sulfate slag, the calcium carbide collected ash, the lime rock ballast, six kinds of waste residues of lime mud by weight reprovision than after send into and unload abrasive dust in oven dry and wear into fine powder and flyash and send into together powder separating machine and mix the qualified fine powder of screening, then entering drying tube mixes by weight with carbide slag, screening underproof meal unloads mill in returning and grinds, enter raw material homogenizing silo after waste residue drying pipe drying, when being 80 ℃-100 ℃, temperature sends into temperature and is the secondary preheater funnel uptake of 600 ℃-750 ℃, entering the one-level cyclone after raw material are preheated collects, waste gas is discharged from the outlet of one-level cyclone, it is three grades of cyclone funnel uptakes of 700 ℃-900 ℃ that the raw material of collecting fall into temperature from the one-level cyclone, enter secondary rotary wind device after heat exchange and carry out gas solid separation, waste gas is discharged from the outlet of secondary cyclone, the solid phase of separating is sent into and is sent into three grades of cyclones after decomposing furnace decomposes and carry out gas solid separation, solid phase falls into smoke-box and calcines, then send into rotary kiln and further generate cement slurry after calcining, discharged by the rotary kiln outlet.
Above-mentioned a kind of full waste residue low temperature is sharply calcined cement of high index grog method, and its drying tube and rotary kiln are interconnected, and recycling residual heat reduces costs.
Above-mentioned a kind of full waste residue low temperature is sharply calcined cement of high index grog method, and its one-level cyclone temperature out solves waste heat boiler skinning problem in 450 ℃.
Above-mentioned a kind of full waste residue low temperature is sharply calcined cement of high index grog method, and its solid phase is 600 ℃-650 ℃ in secondary cyclone blanking temperature out, and waste gas is 650 ℃-700 ℃ in the outlet of secondary cyclone.
Above-mentioned a kind of full waste residue low temperature is sharply calcined cement of high index grog method, and its rotary kiln temperature is at 1250 ℃-1350 ℃.
Above-mentioned a kind of full waste residue low temperature is sharply calcined cement of high index grog method, and its secondary preheater funnel uptake temperature is between 650 ℃-700 ℃.
Above-mentioned a kind of full waste residue low temperature is sharply calcined cement of high index grog method, and its three grades of cyclone funnel uptake temperature are between 750 ℃-850 ℃.
The invention has the advantages that: added lime mud in one, formula, need not siliceous correction material sandstone, silica, make material enter at short notice rotary kiln and calcine, system stability simple to operate, operation rate is high; Secondly, the one-level heater outlet temperature is reduced in 450 ℃ by 600 ℃, makes calcium hydroxide not produce decomposition condition, do not form the reversed reaction of calcium oxide and carbonic acid gas, makes not skinning of waste heat boiler; Three, this programme utilizes the collocation of low grade calcareous lime rock ballast and higher-grade carbide slag to use, and it is high that a heat absorption, heat release have solved temperature out, reaches again the purpose of resource reutilization and cleaner production.
Therefore, this programme takes flash fire theoretical, proportion scheme is added a certain amount of poor line rock ballast heat absorption, make the cooling of secondary funnel uptake become preheating, three grades of funnel uptakes decompose, entering secondary preheater funnel uptake from raw material only needed complete within kind in short several seconds to decomposing furnace, and material is warming up to rapidly 800-850 ℃, the active substance CaO after decomposition
2, SiO
2, AlO
3, Fe
2O
3Generate rapidly Cl at decomposing furnace
2A
7, C
2S and wustite mineral have alleviated the operating load of rotary kiln, have improved quality and the output of product.
Description of drawings
Fig. 1 is the process flow sheet of the embodiment of the present invention 1
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing 1, but scope of the present invention also not only is confined to example, its claimed scope is recorded in the claim of claim.
Embodiment 1
(1) raw material and the parts by weight of full producing cement from fag end grog are:
Carbide slag 55-75 part, calcium carbide collected ash 2-7 part, lime mud 1-10 part, lime rock ballast 5-15 part, flyash 6-10 part, slag 3-6 part, coal gangue 3-6 part, sulfate slag 2-3 part;
(2) producing and manufacturing technique is:
a kind of full waste residue low temperature is sharply calcined cement of high index grog method, comprise the steps: at first 4 part 1 of coal gangue, 4 part 2, slag, 2.5 part 3 of sulfate slag, 5 part 4 of calcium carbide collected ash, 10 part 5 of lime rock ballast, 6 part 6 of lime mud by weight reprovision than after send into and unload mill 11 grindings in oven dry and become fine powder and flyash 12 to send into together powder separating machine 10 to mix the qualified fine powders of screening, then entering drying tube 8 mixes for 62.5 part 7 with the carbide slag of water content 7%, screening underproof meal unloads mill 11 in returning and grinds, waste residue enters raw material homogenizing silo 9 through the temperature of 250 ℃ that rotary kiln 20 kiln tail gas provide after drying tube 8 dryings, when being 90 ℃, temperature sends into temperature and is the secondary preheater funnel uptake 13 of 680 ℃, raw material are preheating to 430 ℃, entering one-level cyclone 14 collects, waste gas is discharged from 14 outlets of one-level cyclone, it is three grades of cyclone funnel uptakes 15 of 860 ℃ that the raw material of collecting fall into temperature from one-level cyclone 14, enter secondary rotary wind device 16 after heat exchange and carry out gas solid separation, waste gas is discharged from 16 outlets of secondary cyclone, the solid phase of separating is sent into and is sent into three grades of cyclones 18 after decomposing furnace 17 decomposes and carry out gas solid separation, solid phase falls into smoke-box 19 and calcines, then send into rotary kiln 20 and further generate cement slurry after calcining at the temperature of 1300 ℃, discharged by rotary kiln 20 outlets.
Embodiment 2 is with the difference of embodiment 1: secondary cyclone temperature out is 600 ℃, and waste gas is 650 ℃ in the outlet of secondary cyclone, and kiln temperature is 1250 ℃.
Embodiment 2 is with the difference of embodiment 1 or 2: secondary cyclone temperature out is 650 ℃, and waste gas is 700 ℃ in the outlet of secondary cyclone, and kiln temperature is 1350 ℃.
Claims (7)
1. a full waste residue low temperature is sharply calcined cement of high index grog method, comprises that the raw material of full producing cement from fag end grog and parts by weight are:
carbide slag 55-75 part, calcium carbide collected ash 2-7 part, lime mud 1-10 part, lime rock ballast 5-15 part, flyash 6-10 part, slag 3-6 part, coal gangue 3-6 part, sulfate slag 2-3 part, it is characterized in that: at first with coal gangue, slag, sulfate slag, the calcium carbide collected ash, the lime rock ballast, six kinds of waste residues of lime mud by weight reprovision than after send into and unload abrasive dust in oven dry and wear into fine powder and flyash and send into together powder separating machine and mix the qualified fine powder of screening, then entering drying tube mixes by weight with carbide slag, screening underproof meal unloads mill in returning and grinds, enter raw material homogenizing silo after waste residue drying pipe drying, when being 80 ℃-100 ℃, temperature sends into temperature and is the secondary preheater funnel uptake of 600 ℃-750 ℃, entering the one-level cyclone after raw material are preheated collects, waste gas is discharged from the outlet of one-level cyclone, it is three grades of cyclone funnel uptakes of 700 ℃-900 ℃ that the raw material of collecting fall into temperature from the one-level cyclone, enter secondary rotary wind device after heat exchange and carry out gas solid separation, waste gas is discharged from the outlet of secondary cyclone, the solid phase of separating is sent into and is sent into three grades of cyclones after decomposing furnace decomposes and carry out gas solid separation, solid phase falls into smoke-box and calcines, then send into rotary kiln and further generate cement slurry after calcining, discharged by the rotary kiln outlet.
2. a kind of full waste residue low temperature as claimed in claim 1 is sharply calcined cement of high index grog method, it is characterized in that drying tube and rotary kiln are interconnected.
3. a kind of full waste residue low temperature as claimed in claim 1 is sharply calcined cement of high index grog method, it is characterized in that one-level cyclone temperature out is in 450 ℃.
4. a kind of full waste residue low temperature as claimed in claim 1 is sharply calcined cement of high index grog method, it is characterized in that solid phase is 600 ℃-650 ℃ in secondary cyclone temperature out, and waste gas is between 650 ℃-700 ℃ in secondary cyclone temperature out.
5. a kind of full waste residue low temperature as claimed in claim 1 is sharply calcined cement of high index grog method, it is characterized in that rotary kiln temperature is between 1250 ℃-1350 ℃.
6. a kind of full waste residue low temperature as claimed in claim 1 is sharply calcined cement of high index grog method, it is characterized in that secondary preheater funnel uptake temperature is between 650 ℃-700 ℃.
7. a kind of full waste residue low temperature as claimed in claim 1 is sharply calcined cement of high index grog method, it is characterized in that three grades of cyclone funnel uptake temperature are between 750 ℃-850 ℃.
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| EP2676943B2 (en) * | 2012-06-20 | 2021-01-20 | HeidelbergCement AG | Method for producing a Belite cement with high reactivity and low calcium/silicate ratio |
| CN104944814A (en) * | 2015-07-01 | 2015-09-30 | 嘉华特种水泥股份有限公司 | Low-temperature calcining technology for cement clinker |
| CN104944813A (en) * | 2015-07-01 | 2015-09-30 | 嘉华特种水泥股份有限公司 | Particulate Portland cement clinker and preparation method thereof |
| WO2018166221A1 (en) * | 2017-03-17 | 2018-09-20 | 山东大学 | System and method for co-treating organic wastewater and industrial solid waste |
| CN107857526B (en) * | 2017-10-25 | 2020-02-07 | 中国科学院武汉岩土力学研究所 | Clay gelling consolidation seepage-proofing agent for refuse landfill bottom seepage-proofing system |
| CN110550874A (en) * | 2019-07-09 | 2019-12-10 | 天辰水泥有限责任公司 | Batching method for preparing portland cement clinker by low-emission full-industrial waste residues |
| CN113105131B (en) * | 2021-03-22 | 2023-06-06 | 新疆至臻化工工程研究中心有限公司 | Method for purifying ash by comprehensively utilizing calcium carbide |
| CN114477803A (en) * | 2022-01-26 | 2022-05-13 | 宁夏金昱元资源循环有限公司 | Production method of carbide slag cement |
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