CN117209178A - Energy-saving additive for non-clinker composite seed crystal of rotary kiln calcined cement and use method thereof - Google Patents
Energy-saving additive for non-clinker composite seed crystal of rotary kiln calcined cement and use method thereof Download PDFInfo
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- CN117209178A CN117209178A CN202310971613.9A CN202310971613A CN117209178A CN 117209178 A CN117209178 A CN 117209178A CN 202310971613 A CN202310971613 A CN 202310971613A CN 117209178 A CN117209178 A CN 117209178A
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- 239000004568 cement Substances 0.000 title claims abstract description 85
- 239000000654 additive Substances 0.000 title claims abstract description 65
- 230000000996 additive effect Effects 0.000 title claims abstract description 65
- 239000013078 crystal Substances 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000002893 slag Substances 0.000 claims abstract description 57
- 238000001354 calcination Methods 0.000 claims abstract description 42
- 239000007791 liquid phase Substances 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 20
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 19
- 239000010436 fluorite Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 16
- 238000005265 energy consumption Methods 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 239000011574 phosphorus Substances 0.000 claims abstract description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000009792 diffusion process Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 10
- 239000002367 phosphate rock Substances 0.000 claims 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims 2
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 11
- 239000000292 calcium oxide Substances 0.000 description 10
- 239000003245 coal Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 230000005611 electricity Effects 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 230000001737 promoting effect Effects 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 5
- 150000002910 rare earth metals Chemical class 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 3
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000000126 substance 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
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000013081 microcrystal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application discloses a non-clinker composite seed crystal energy-saving additive for rotary kiln calcined cement and a use method thereof, and relates to the technical field of cement preparation, wherein the additive is prepared by fully mixing and grinding steel slag, bauxite, phosphorus slag, fluorite and granulated blast furnace slag; the application fully mixes and grinds the additive, adds the additive into the cement raw material according to the mass percent of 3-8%, mixes the additive, and then sends the mixture into a rotary kiln for clinker calcination; the method can effectively reduce the liquid phase generation temperature and liquid phase viscosity in the clinker calcination process, improve the diffusion speed of C2S and CaO in the liquid phase, and promote the development and growth of C3S crystals, thereby greatly reducing the cement calcination energy consumption and reducing the carbon emission.
Description
Technical Field
The application relates to the technical field of cement preparation, in particular to a non-clinker composite seed crystal energy-saving additive for rotary kiln calcined cement and a use method thereof.
Background
The cost of cement production processes is mainly electricity and coal, which account for two thirds of the cost of cement production. Along with the implementation of the national energy-saving policy, cement manufacturers in China generally implement process energy-saving technology transformation, and energy-saving measures such as a cement feeding system frequency conversion energy-saving technology, a pre-grinding technology, an exhaust system heat pipe technology, a pulverized coal spraying combustion technology and the like are adopted, so that the energy consumption of cement production is greatly reduced. The data show that 28 energy efficiency leaders in the cement industry in China issued by the industrial information department are available in total, the enterprises are subjected to technical innovation under the guidance of energy conservation and environmental protection policies, various energy conservation and consumption reduction processes and measures are adopted, the comprehensive energy consumption of cement clinker unit products is reduced to 100kg of standard coal per ton of cement, and the corresponding optimization standard reaches 9% -20%. Compared with the average energy consumption of the cement industry in the same period, the method reduces 8kg of standard coal.
In the process of researching how to reduce the energy consumption of cement clinker production, expert students propose to add clinker seed crystals or non-clinker seed crystals in the process of proportioning cement production, and the purposes of saving energy and reducing consumption are achieved by improving the easy burning property of cement raw materials, reducing the eutectic temperature of cement and promoting chemical reaction, so that carbon emission is reduced, and a good energy-saving economic effect is achieved.
Patent number CN109776004a discloses an energy-saving additive for calcining cement in a vertical kiln, which comprises the following components:
20-35% of fluorite, 10-20% of perlite and frog stone, 5-10% of rare earth, 15-30% of serpentine and 10-20% of diatomite. The method has the main effects of promoting the breakage of Si-O bonds of the silicon oxide, providing crystal water, promoting the volume expansion and loosening of the burned pellets, promoting the formation of microcrystals of minerals in the chemical reaction of raw materials and promoting the progress of the chemical reaction, so as to achieve the aims of preventing a series of adverse effects caused by the shrinkage of the burned pellets, reducing energy consumption and improving the strength of cement products.
With respect to the search of the above data, it can be seen that the energy-saving additive for calcining the vertical kiln cement disclosed in patent number CN109776004A adopts natural mineral materials such as fluorite, perlite, frog stone, rare earth, serpentine, diatomite and the like in the formula, so that the energy-saving additive is high in price, and the use cost of the energy-saving additive is greatly increased. Secondly, rare earth is a rare strategic resource in China, and the rare earth is used as an energy-saving additive for producing cement, so that the resource is excessively wasted and the practical application significance is lacked. The technical effects are that 10% of coal is saved for ton of cement raw materials, 5kwh of electricity is saved for ton of cement, 15% of the production per kiln is improved, and 2-5MPa of clinker strength is improved; the data do not fit the actual industrial production of the cement industry. Although the energy consumption of the cement calcination of the vertical kiln is reduced to a certain extent, the use amount of coal is reduced, and the output per time and the clinker strength of the vertical kiln are improved, the additive is high in price and use cost, and rare earth is a national scarce strategic resource, so that the industrial popularization and application value is lacked.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides the energy-saving additive for the non-clinker composite seed crystal of the rotary kiln calcined cement, which provides the energy-saving additive for the non-clinker composite seed crystal of the rotary kiln calcined cement for the cement manufacturing industry, greatly reduces the energy consumption of cement clinker calcination, saves the cement production cost and reduces the carbon emission.
In order to achieve the above purpose, the present application provides the following technical solutions:
the energy-saving additive for the non-clinker composite seed crystal of the rotary kiln calcined cement is characterized in that: the additive is prepared by fully mixing and grinding steel slag, bauxite, phosphorus slag, fluorite and granulated blast furnace slag.
Wherein the mass percentage of the steel slag in the steel slag is 30-50%.
Wherein the bauxite accounts for 10-30% of the total mass of the bauxite.
Wherein the mass percentage of the phosphorus slag in the slag is 5-20%.
Wherein the fluorite accounts for 5-20% of the total mass of the material.
Wherein the mass percentage of the granulated blast furnace slag is 10-30%.
Preferably, the additive is prepared by fully mixing and grinding 40% of steel slag, 20% of bauxite, 10% of phosphorus slag, 10% of fluorite and 20% of granulated blast furnace slag according to mass percent.
The method for using the energy-saving additive for calcining cement non-clinker composite seed crystals in a rotary kiln comprises the steps of fully mixing and grinding the additive, adding the additive into cement raw materials according to the mass percent of 3-8%, mixing, and then sending the mixture into the rotary kiln for clinker calcination; can effectively reduce the liquid phase generation temperature and liquid phase viscosity in the clinker calcination process and improve C 2 Diffusion rate of S and CaO in liquid phase, promote C 3 The S crystal grows up, thereby greatly reducing the energy consumption of cement calcination and reducing carbon emission.
Preferably, the mass ratio of the additive to the cement raw material is 5%:1.
the application has the following beneficial effects:
(1) The composite seed crystal energy-saving additive can effectively reduce clinker liquidPhase formation temperature and liquid phase viscosity, increase C 2 Diffusion speed of S and CaO in liquid phase, promote C 3 S crystal grows up, so that the energy consumption of cement calcination in the rotary kiln is greatly reduced, the energy-saving additive after calcination is converted into clinker, and the yield and strength of the clinker are improved. Meanwhile, the standard consistency of the cement clinker is reduced, and the cement performance is improved.
(2) The composite seed crystal energy-saving additive takes steel slag, bauxite, phosphorus slag, fluorite and granulated blast furnace slag as raw materials, and other raw materials except the fluorite are industrial waste residues, so that the composite seed crystal energy-saving additive is easy to obtain and low in cost; the composite seed crystal energy-saving additive formula material has low use cost, is lower than the cement clinker production cost, has high cost performance and is easy to industrially popularize and apply.
(3) The composite seed crystal energy-saving additive of the application has simple use method, no special operation, only mixing in kiln cement raw materials according to proportion, and easy control of the technological process.
(4) The composite seed crystal energy-saving additive of the application reduces the comprehensive energy consumption of cement clinker unit products to 96.31kgce per ton of cement, and the energy-saving technical index reaches the leading level of the same industry in China.
Detailed Description
In order that those skilled in the art will better understand the present application, the following description will provide further details in connection with specific embodiments, but it should be understood that the scope of the application is not limited by the specific embodiments.
The embodiment of the application provides a rotary kiln calcined cement non-clinker composite seed crystal energy-saving additive and a use method thereof, which provide the rotary kiln calcined cement non-clinker composite seed crystal energy-saving additive for cement manufacturing industry, greatly reduce the energy consumption of cement clinker calcination, save the cement production cost and reduce the carbon emission.
The following describes the technical scheme of the application in detail through specific embodiments:
unless otherwise indicated, the technical means used in the present application are conventional means well known to those skilled in the art, and various raw materials, reagents, instruments, equipment, etc. used in the present application are commercially available or can be prepared by existing methods.
In the present application, the parts by mass may be the weight unit known in the art such as mu g, mg, g, kg, or may be a multiple thereof such as 1/10, 1/100, 10 times, 100 times, etc.
Example 1
The energy-saving additive for non-clinker composite crystal seed of rotary kiln calcined cement is prepared by fully mixing and grinding 40% of steel slag, 20% of bauxite, 10% of phosphorus slag, 10% of fluorite and 20% of granulated blast furnace slag according to mass percent.
The method for using the energy-saving additive for calcining cement non-clinker composite seed crystals in a rotary kiln comprises the steps of fully mixing and grinding the additive, adding the additive into cement raw materials according to the mass percent of 5%, mixing, and then sending the mixture into the rotary kiln for clinker calcination; can effectively reduce the liquid phase generation temperature and liquid phase viscosity in the clinker calcination process and improve C 2 Diffusion rate of S and CaO in liquid phase, promote C 3 The S crystal grows up, thereby greatly reducing the energy consumption of cement calcination and reducing carbon emission.
Example 2
The energy-saving additive for the non-clinker composite seed crystal of the rotary kiln calcined cement is prepared by fully mixing and grinding 30% of steel slag, 30% of bauxite, 10% of phosphorus slag, 10% of fluorite and 20% of granulated blast furnace slag according to mass percent.
The method for using the energy-saving additive for calcining cement non-clinker composite seed crystals in a rotary kiln comprises the steps of fully mixing and grinding the additive, adding the additive into cement raw materials according to the mass percent of 3%, mixing, and then sending the mixture into the rotary kiln for clinker calcination;
example 3
The energy-saving additive for non-clinker composite crystal seed of rotary kiln calcined cement is prepared by fully mixing and grinding 50% of steel slag, 10% of bauxite, 15% of phosphorus slag, 15% of fluorite and 10% of granulated blast furnace slag according to mass percent.
The method for using the energy-saving additive for calcining cement non-clinker composite seed crystal in the rotary kiln comprises the steps of fully mixing and grinding the additive, adding the additive into cement raw material according to the mass percent of 8%, mixing, and then sending the mixture into the rotary kiln for clinker calcination.
The results of the examples show that the non-clinker composite seed energy-saving additive is beneficial to promoting the chemical reaction of clinker, and when the addition of the additive is the following numerical values, the clinker calcination energy-saving technical indexes are as follows:
(1) The energy-saving additive of the composite seed crystal is added in an amount of 3 percent: the clinker calcination temperature is reduced to 1400 ℃ (1400-1450 ℃ in normal condition), the content of free calcium oxide (f-CaO) of the kiln-leaving clinker is reduced, the unit clinker is saved by 3.26kg/t, the unit clinker calcination rotary kiln saves electricity by 1.8kwh/t, the kiln-time yield of the calcination rotary kiln is improved by 1.9%, and the cement clinker strength is improved by 1.02MPa.
(2) The energy-saving additive of the composite seed crystal is added in an amount of 5 percent: the clinker calcination temperature is reduced to 1350 ℃ (1400-1450 ℃ in normal condition), the content of free calcium oxide (f-CaO) of the kiln-outlet clinker is reduced, the unit clinker is saved by 3.51kg/t, the unit clinker calcination rotary kiln saves electricity by 2.2kwh/t, the kiln-time yield of the calcination rotary kiln is improved by 2.4%, and the cement clinker strength is improved by 1.12MPa.
(3) Composite seed energy-saving additive with the addition of 8 percent: the clinker calcination temperature is reduced to 1300 ℃ (1400-1450 ℃ in normal condition), the content of free calcium oxide (f-CaO) of the kiln-outlet clinker is reduced, the unit clinker is saved by 3.69kg/t, the unit clinker calcination rotary kiln saves electricity by 2.5kwh/t, the kiln-time yield of the calcination rotary kiln is improved by 3.0%, and the cement clinker strength is improved by 1.2MPa.
The working principle of the application is as follows:
the energy-saving additive for the non-clinker composite seed crystal of the rotary kiln calcined cement consists of materials such as steel slag, bauxite, phosphorous slag, fluorite, granulated blast furnace slag and the like, wherein in the formula materials, most of the materials are industrial waste residues, only the fluorite is primary mineral, and the material formula cost is low; when in use, the materials are fully mixed and ground, added into cement raw materials in an amount of 3-8%, and then sent into a rotary kiln for clinker calcination; during calcination:
action of steel slag: the chemical main components of the steel slag are calcium oxide, silicon dioxide, aluminum oxide, ferric oxide, magnesium oxide and the like, and the components are very stable, and the mineral composition of the steel slag is similar to that of clinker, thus finishingThe fully-replaceable clinker can be used as seed crystal to accelerate C 3 S is formed, the generation temperature is reduced, the coal consumption is obviously reduced, the clinker strength is obviously improved, and the clinker f-Ca0 is obviously reduced. The steel slag contains higher iron (24.11%), part of iron stone can be saved by using the steel slag as seed crystal, and calcium oxide (36.19%) in the steel slag can replace calcium carbonate in limestone, so CaCO (CaCO) is reduced 3 Is a decomposition heat loss of the (c). In addition, after the steel slag is added, the kiln fire is obviously accelerated, the production of the rotary kiln in the machine hour can be improved, the raw meal combustibility is improved, and the calcination operation of the rotary kiln is improved.
Bauxite action: the bauxite is added into the calcined raw material to improve the aluminum content, reduce the liquid phase generation temperature, ensure the formation of a large amount of tricalcium aluminate in the clinker, and play a positive role in improving the early strength of the clinker.
Action of phosphorous slag: the phosphorus slag is waste slag discharged from industrial production of yellow phosphorus, is granulated electric furnace phosphorus slag which is quenched into granules, belongs to high-energy glass body and is formed from a plurality of CaO.SiO with stronger activity 2 Micro-crystals. The cement raw material is added with a proper amount of phosphorous slag, the calcination process can improve the activation process of clinker, has good crystal nucleus induction effect on clinker mineral formation, and can reduce C 3 S formation energy consumption, promote CS 3 Form and simultaneously reduce CaCO of raw materials 3 Is not limited, and the decomposing heat consumption and the dehydration heat consumption of the kaolinite are not limited. The phosphorous slag vitreous body has a crystal Hua Fangre peak at about 950 ℃ to replace seed crystal ingredients to calcine cement clinker, and has obvious effect on reducing the heat consumption of the clinker.
Role of fluorite: c in the solid phase reaction stage of cement clinker 2 S is formed in large quantity at 1100-1200 ℃, C 2 The amount of S reaches a peak value and a liquid phase is generated as the temperature continues to rise. Under the action of liquid phase, C 2 S and f-CaO are gradually dissolved in liquid phase, ca 2+ Ion diffusion and C 2 S reacts to form C 3 S, sintering of clinker is liquid phase sintering, and the liquid phase quantity and the liquid phase viscosity have an important influence on the absorption of f-CaO. Along with the addition of fluorite as mineralizer into cement raw material, the liquid phase quantity is obviously increased, the liquid phase viscosity is reduced, and the effect of saving energy and reducing consumption is particularly remarkable when the fluorite is used as seed crystal.
Granulating blast furnace oreSlag action: the clinker seed is replaced by non-clinker seed slag. The slag is molten water quenched slag discharged from steel-making blast furnace, and the main chemical components are CaO and SiO 2 The main ingredients of the minerals are S 2 S exists in a form, crystals are formed, the development is good, the chemical potential and the activity are high, the equivalent crystallization induction effect with high-quality clinker can be fully exerted in the sintering process of the cement clinker, potential heat energy can be released by slag in a high-temperature melting state, the liquid phase generation temperature is reduced, the sintering temperature range is enlarged, and the heat consumption of the clinker is reduced.
The energy-saving additive for the cement non-clinker seed crystal of the calcining kiln can be applied to the industrial production line of the calcining kiln to achieve the following energy-saving technical indexes:
(1) The carbon emission is reduced by 2.66-2.72 tons per ton of standard coal for 1 year. The energy-saving additive of the application saves 3.69kgce/t coal for each ton of clinker, and the coal consumption of the folded material is 5.17kg, thereby reducing carbon emission (namely CO 2 ) 9.82-10.04kg, and the annual production of 150 ten thousand tons of clinker is calculated, and the annual carbon emission is reduced by 1.47-1.51 ten thousand tons.
(2) Electricity is saved by 2.5kwh/t for each ton of clinker calcination rotary kiln;
(3) The output of the rotary kiln calcination station is improved by 3.0 percent;
(4) The strength of the cement clinker is improved by 1.2MPa.
The foregoing descriptions of specific exemplary embodiments of the present application are presented for purposes of illustration and description. It is not intended to limit the application to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the application and its practical application to thereby enable one skilled in the art to make and utilize the application in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the application be defined by the claims and their equivalents.
Claims (9)
1. The energy-saving additive for the non-clinker composite seed crystal of the rotary kiln calcined cement is characterized in that: the additive is prepared by fully mixing and grinding steel slag, bauxite, phosphorus slag, fluorite and granulated blast furnace slag.
2. The energy-saving additive for cement non-clinker composite seed crystals calcined in a rotary kiln according to claim 1, which is characterized in that: the mass percentage of the steel slag in the steel slag is 30-50%.
3. The energy-saving additive for cement non-clinker composite seed crystals calcined in a rotary kiln according to claim 1, which is characterized in that: the bauxite accounts for 10-30% of the total mass of the bauxite.
4. The energy-saving additive for cement non-clinker composite seed crystals calcined in a rotary kiln according to claim 1, which is characterized in that: the mass percentage of the phosphorite slag in the phosphorite slag is 5-20%.
5. The energy-saving additive for cement non-clinker composite seed crystals calcined in a rotary kiln according to claim 1, which is characterized in that: the fluorite accounts for 5-20% of the total mass of the material.
6. The energy-saving additive for cement non-clinker composite seed crystals calcined in a rotary kiln according to claim 1, which is characterized in that: the mass percentage of the granulated blast furnace slag is 10-30%.
7. The energy-saving additive for cement non-clinker composite seed crystals calcined in a rotary kiln according to claim 1, which is characterized in that: the additive is prepared by fully mixing and grinding 40% of steel slag, 20% of bauxite, 10% of phosphorus slag, 10% of fluorite and 20% of granulated blast furnace slag according to mass percentage.
8. A method of using a rotary kiln calcined cement non-clinker composite seed energy saving additive according to any one of claims 1 to 7, characterized in that: adding the additive into cement raw materials according to the mass percentage of 3-8%, mixing, and then sending into a rotary kiln for clinker calcination; can effectively reduce clinker calcinationThe liquid phase generation temperature and the liquid phase viscosity of the process are improved to improve C 2 Diffusion rate of S and CaO in liquid phase, promote C 3 The S crystal grows up, thereby greatly reducing the energy consumption of cement calcination and reducing carbon emission.
9. The method for using the rotary kiln calcined cement non-clinker composite seed energy-saving additive according to claim 8, which is characterized in that: the mass ratio of the additive to the cement raw material is 5 percent: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060643A (en) * | 1990-10-13 | 1992-04-29 | 中国建筑材料科学研究院 | Add the technology of crystal seed raising cement kiln calcining efficacy |
| CN1603269A (en) * | 2004-09-27 | 2005-04-06 | 武汉理工大学 | Highly active cement mineral forming promoter |
| CN1693252A (en) * | 2005-05-24 | 2005-11-09 | 武汉理工大学 | Process for fast baking early strength silicate cement clinker |
| CN107056104A (en) * | 2017-05-28 | 2017-08-18 | 翟永生 | Prevention and the additive for eliminating skinning balling ring formation in rotary kiln |
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2023
- 2023-08-03 CN CN202310971613.9A patent/CN117209178B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060643A (en) * | 1990-10-13 | 1992-04-29 | 中国建筑材料科学研究院 | Add the technology of crystal seed raising cement kiln calcining efficacy |
| CN1603269A (en) * | 2004-09-27 | 2005-04-06 | 武汉理工大学 | Highly active cement mineral forming promoter |
| CN1693252A (en) * | 2005-05-24 | 2005-11-09 | 武汉理工大学 | Process for fast baking early strength silicate cement clinker |
| CN107056104A (en) * | 2017-05-28 | 2017-08-18 | 翟永生 | Prevention and the additive for eliminating skinning balling ring formation in rotary kiln |
Non-Patent Citations (2)
| Title |
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| 刘鹏飞等: ""细度和矿化剂对水泥生料易烧性影响研究"", 《混凝土世界》, no. 6, 20 June 2020 (2020-06-20), pages 68 - 71 * |
| 马保国等: ""磷-氟-钢渣复合添加剂对水泥熟料烧成的影响"", 《硅酸盐学报》, vol. 35, no. 3, 26 March 2007 (2007-03-26), pages 275 - 280 * |
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