CN113998910A - Calcining clinker for replacing partial clay with municipal solid waste incineration bottom slag and preparation method thereof - Google Patents
Calcining clinker for replacing partial clay with municipal solid waste incineration bottom slag and preparation method thereof Download PDFInfo
- Publication number
- CN113998910A CN113998910A CN202111413126.8A CN202111413126A CN113998910A CN 113998910 A CN113998910 A CN 113998910A CN 202111413126 A CN202111413126 A CN 202111413126A CN 113998910 A CN113998910 A CN 113998910A
- Authority
- CN
- China
- Prior art keywords
- clinker
- solid waste
- clay
- waste incineration
- municipal solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 71
- 238000004056 waste incineration Methods 0.000 title claims abstract description 71
- 239000004927 clay Substances 0.000 title claims abstract description 69
- 239000002893 slag Substances 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000001354 calcination Methods 0.000 title claims description 29
- 239000002994 raw material Substances 0.000 claims abstract description 79
- 239000004568 cement Substances 0.000 claims abstract description 48
- 235000019738 Limestone Nutrition 0.000 claims abstract description 27
- 239000006028 limestone Substances 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 22
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003245 coal Substances 0.000 claims description 38
- 239000000203 mixture Substances 0.000 claims description 34
- 239000000843 powder Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 9
- 239000002802 bituminous coal Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- 238000000265 homogenisation Methods 0.000 claims description 8
- 235000012054 meals Nutrition 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 239000004615 ingredient Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 30
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 15
- 229910052681 coesite Inorganic materials 0.000 description 15
- 229910052593 corundum Inorganic materials 0.000 description 15
- 229910052906 cristobalite Inorganic materials 0.000 description 15
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 15
- 239000000377 silicon dioxide Substances 0.000 description 15
- 229910052682 stishovite Inorganic materials 0.000 description 15
- 229910052905 tridymite Inorganic materials 0.000 description 15
- 229910001845 yogo sapphire Inorganic materials 0.000 description 15
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000007605 air drying Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000003039 volatile agent Substances 0.000 description 2
- 206010057175 Mass conditions Diseases 0.000 description 1
- 241000282376 Panthera tigris Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the field of cement, and particularly relates to a calcined cement clinker prepared by replacing part of clay with municipal solid waste incineration bottom slag and a preparation method thereof. The raw material of the cement clinker is prepared by replacing part of clay with municipal solid waste incineration bottom slag, and comprises the following components in parts by mass: limestone: 87.0-92.0%, clay: 3.0-6.5%, municipal solid waste incineration bottom slag: 1.0-4.0%, non-ferrous metal ash: 2.0 to 5.0 percent. The clinker ingredient disclosed by the invention effectively reduces the production cost of clinker, can reduce the use of clay resources, opens up a new path for comprehensive utilization of municipal solid waste incineration bottom slag resources, and simultaneously keeps the quality of cement clinker unchanged and meets the production requirements.
Description
Technical Field
The invention belongs to the field of cement, and particularly relates to a calcined cement clinker prepared by replacing part of clay with municipal solid waste incineration bottom slag and a preparation method thereof.
Background
As the cement industry is a resource enterprise, along with the increasing shortage of resources, the requirement of the production and use of high-quality raw materials is relatively tight, and the raw material cost is continuously increased.
At present, siliceous raw material clay for cement clinker is influenced by factors such as land, environmental protection and the like, and less clay resources can be exploited and utilized. The municipal solid waste incineration bottom slag is waste slag generated in the process of treating waste incineration in a waste power plant, and according to statistics, 12 ten thousand tons of municipal solid waste incineration bottom slag can be generated every year in China, so that a large amount of incineration bottom slag needs to be treated, and the main component of the incineration bottom slag is SiO2、Al2O3、CaO、Fe2O3MgO, NaO and the like, and the incineration bottom slag of municipal solid waste in China belongs to common waste and is usually subjected to landfill treatment. The invention provides a method for calcining cement clinker by replacing part of clay with municipal solid waste incineration bottom slag, which can improve the combustibility of raw materials, reduce the clinker calcination coal consumption and the production cost, and open up a new path for the comprehensive utilization of municipal solid waste incineration bottom slag resources.
Disclosure of Invention
The invention aims to solve the problems of the prior art and provides a calcined clinker which uses municipal solid waste incineration bottom slag to replace part of clay and a preparation method thereof. The method of the invention effectively reduces the production cost of the clinker, opens up a new way for the comprehensive utilization of the municipal solid waste incineration bottom slag resources, simultaneously keeps the quality of the cement clinker unchanged, and meets the production requirements.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the cement clinker is calcined by replacing part of clay with municipal solid waste incineration bottom slag, raw materials of the cement clinker are prepared by replacing part of clay with municipal solid waste incineration bottom slag, and the raw materials of the raw materials comprise the following components in parts by mass:
limestone: 87.0 to 92.0 percent,
clay: 3.0 to 6.5 percent of the total weight of the mixture,
municipal solid waste incineration bottom slag: 1.0 to 4.0 percent of the total weight of the mixture,
non-ferrous metal ash: 2.0 to 5.0 percent.
More preferably, the raw materials of the raw meal comprise the following components in parts by mass:
limestone: 88.0 to 91.0 percent,
clay: 3.0 to 6.0 percent of the total weight of the mixture,
municipal solid waste incineration bottom slag: 1.0 to 3.5 percent of the total weight of the mixture,
non-ferrous metal ash: 3.0 to 4.5 percent.
Preferably, the municipal solid waste incineration bottom slag comprises the following components in percentage by mass:
Loss： 1.0-6.0％，
SiO2： 55.0-70.0％，
Al2O3： 10.0-20.0％，
Fe2O3： 2.0-5.0％，
CaO： 8.0-15.0％，
MgO： 0.5-3.0％。
preferably, the limestone comprises the following components in percentage by mass:
Loss： 37.0-42.0％，
SiO2： 8.0-11.0％，
Al2O3： 0.8-1.8％，
Fe2O3： 0.3-1.3％，
CaO： 46.0-50.0％，
MgO： 0.3-1.5％。
preferably, the clay comprises the following components in percentage by mass:
Loss： 4.0-10.5％，
SiO2： 65.0-75.0％，
Al2O3： 12.0-20.0％，
Fe2O3： 2.0-5.0％，
CaO： 1.0-7.0％，
MgO： 1.0-4.0％。
preferably, the non-ferrous metal comprises the following components in percentage by mass:
Loss： -3.5-0.5％，
SiO2： 27.0-38.0％，
Al2O3： 2.5-7.0％，
Fe2O3： 53.0-57.0％，
CaO： 2.5-6.0％，
MgO： 0.5-4.0％。
preferably, the mixed raw material obtained by mixing the raw materials of the raw material comprises the following components in percentage by mass:
Loss： 31.0-37.0％，
SiO2： 10.0-16.0％，
Al2O3： 2.0-4.0％，
Fe2O3： 2.0-3.0％，
CaO： 42.0-46.0％，
MgO： 0.4-1.5％。
preferably, the clinker comprises the following components in percentage by mass:
SiO2： 21.0-24.0％，
Al2O3： 4.0-5.5％，
Fe2O3： 3.0-5.0％，
CaO： 63.5-67.5％，
MgO： 1.0-2.5％。
preferably, the mineral composition of the clinker and the corresponding clinker values comprise the following components:
KH： 0.90-0.93％，
SM： 2.5-2.8％，
IM： 1.1-1.6％，
C3S： 57.0-64.0％，
C2S： 17.0-22.0％，
C3A： 7.0-8.5％，
C4AF： 9.0-14.0％。
according to the invention, by adjusting the new formula and replacing part of clay with the municipal solid waste incineration bottom slag, the use proportion of the clay required in the raw materials can be reduced, and the mineral composition content in the clinker is kept unchanged.
The invention also aims to provide a preparation method for calcining cement clinker by replacing part of clay with the municipal solid waste incineration bottom slag, which comprises the following steps:
(1) crushing raw materials: respectively crushing large limestone and clay, wherein the granularity of the materials is required to be less than 30mm and is not less than 85%, and respectively conveying the crushed limestone and clay, municipal solid waste incineration bottom slag, non-ferrous metal ash and the like to respective homogenizing warehouses for storage and homogenization;
(2) raw material proportioning: mixing limestone, clay, municipal solid waste incineration bottom slag and non-ferrous metal ash according to the mass fraction (namely mass percentage) of the raw materials;
(3) preparation of raw materials: grinding the mixed material prepared in the step (2) until the sifting residue of a square-hole sieve with the diameter of 0.08mm is less than 18.0 percent to obtain raw material powder, and sending the raw material powder into a raw material warehouse for storage and homogenization;
(4) preparing coal powder: grinding bituminous coal to powder with the screen residue of a square-hole sieve of 0.08mm being less than 12.0 percent to obtain coal powder, and feeding the coal powder into a corresponding coal powder bin for calcining in a rotary kiln and burning in a decomposing furnace;
(5) calcining clinker: and conveying the raw materials in the raw material warehouse to a preheater, a decomposing furnace and a rotary kiln for calcination, simultaneously spraying coal powder into the decomposing furnace and the rotary kiln respectively to participate in calcination, and obtaining cement clinker after calcination.
Preferably, the decomposition temperature in the decomposition furnace in the step (5) is 870-.
Preferably, the total amount of the pulverized coal fed in the step (5) is 8.0-13.0% by mass of the raw meal, and more preferably, the total amount of the pulverized coal fed in the step (5) is 9.0-11.0% by mass of the raw meal.
Preferably, the pulverized coal in the step (5) comprises the following components in percentage by mass:
SiO2：42.0-55.0％，
Al2O3：30.0-42.3％，
Fe2O3：3.6-6.8％，
CaO：4.0-8.0％，
MgO：0.5-3.0％。
preferably, the quality requirements of the bituminous coal in the step (4) are as follows:
air drying base moisture Mad: 1.0 to 2.5 percent of the total weight of the mixture,
air-dried base ash Aad: 18.0 to 34.5 percent of the total weight of the mixture,
air drying base volatiles Vad: 22.0 to 31.0 percent of the total weight of the mixture,
ad, air-dried coal low calorific value Qnet: 21000-25000 kJ/kg.
Preferably, the method also comprises the step (6) of cooling the clinker: and (5) cooling the clinker in the rotary kiln after the clinker is discharged from the rotary kiln, wherein the temperature of the cooled clinker is 50-120 ℃, and the cooled clinker is crushed and then conveyed to a clinker storage.
Compared with the prior art, the invention has the beneficial effects that:
(1) the clinker is produced by using the municipal solid waste incineration bottom slag, so that the use of clay resources can be reduced, and the production cost is reduced;
(2) the utilization way of the municipal solid waste incineration bottom slag is widened, the stacking and the external discharge of waste production enterprises are reduced, the resource recycling is realized, and the requirement of environmental protection is met.
Detailed Description
The technical solution of the present invention is further described in detail by the following specific examples, and it should be understood that the examples described in the present invention are only some examples, and the content of each component has a certain possibility of floating, and when the floating is within a common floating range, the technical solution of the present invention can be implemented and the technical effects of the present invention can be obtained.
The invention provides a cement clinker calcined by replacing partial clay with municipal solid waste incineration bottom slag, wherein a raw material of the cement clinker is prepared by replacing partial clay with municipal solid waste incineration bottom slag, and the raw material of the raw material comprises the following components in parts by mass:
limestone: 87.0 to 92.0 percent,
clay: 3.0 to 6.5 percent of the total weight of the mixture,
municipal solid waste incineration bottom slag: 1.0 to 4.0 percent of the total weight of the mixture,
non-ferrous metal ash: 2.0 to 5.0 percent.
In the invention, the raw materials of the raw material comprise the following components in parts by mass:
limestone: 88.0 to 91.0 percent,
clay: 3.0 to 6.0 percent of the total weight of the mixture,
municipal solid waste incineration bottom slag: 1.0 to 3.5 percent of the total weight of the mixture,
non-ferrous metal ash: 3.0 to 4.5 percent.
In the invention, the municipal solid waste incineration bottom slag comprises the following components in percentage by mass:
Loss： 1.0-6.0％，
SiO2： 55.0-70.0％，
Al2O3： 10.0-20.0％，
Fe2O3： 2.0-5.0％，
CaO： 8.0-15.0％，
MgO： 0.5-3.0％。
in the invention, the limestone comprises the following components in percentage by mass:
Loss： 37.0-42.0％，
SiO2： 8.0-11.0％，
Al2O3： 0.8-1.8％，
Fe2O3： 0.3-1.3％，
CaO： 46.0-50.0％，
MgO： 0.3-1.5％。
in the invention, the clay comprises the following components in percentage by mass:
Loss： 4.0-10.5％，
SiO2： 65.0-75.0％，
Al2O3： 12.0-20.0％，
Fe2O3： 2.0-5.0％，
CaO： 1.0-7.0％，
MgO： 1.0-4.0％。
in the invention, the nonferrous metal comprises the following components in percentage by mass:
Loss： -3.5-0.5％，
SiO2： 27.0-38.0％，
Al2O3： 2.5-7.0％，
Fe2O3： 53.0-57.0％，
CaO： 2.5-6.0％，
MgO： 0.5-4.0％。
in the invention, the mixed raw material obtained by mixing the raw materials of the raw material comprises the following components in percentage by mass:
Loss： 31.0-37.0％，
SiO2： 10.0-16.0％，
Al2O3： 2.0-4.0％，
Fe2O3： 2.0-3.0％，
CaO： 42.0-46.0％，
MgO： 0.4-1.5％。
in the invention, the clinker comprises the following components in percentage by mass:
SiO2： 21.0-24.0％，
Al2O3： 4.0-5.5％，
Fe2O3： 3.0-5.0％，
CaO： 63.5-67.5％，
MgO： 1.0-2.5％，
in the invention, the mineral composition of the clinker and the corresponding clinker rate value comprise the following components:
KH： 0.90-0.93％，
SM： 2.5-2.8％，
IM： 1.1-1.6％，
C3S： 57.0-64.0％，
C2S： 17.0-22.0％，
C3A： 7.0-8.5％，
C4AF： 9.0-14.0％。
according to the invention, by adjusting the new formula and replacing part of clay with the municipal solid waste incineration bottom slag, the use proportion of the clay required in the raw materials can be reduced, and the mineral composition content in the clinker is kept unchanged.
The invention also provides a preparation method for calcining cement clinker by replacing part of clay with the municipal solid waste incineration bottom slag, which comprises the following steps:
(1) crushing raw materials: respectively crushing large limestone and clay, wherein the granularity of the materials is required to be less than 30mm and is not less than 85%, and respectively conveying the crushed limestone and clay, the municipal solid waste incineration bottom slag, non-ferrous metal ash and the like to respective homogenizing storehouses for storage and homogenization through conveying equipment; further, the conveying apparatus is a conventional apparatus, such as a belt conveyor;
(2) raw material proportioning: mixing limestone, clay, municipal solid waste incineration bottom slag and non-ferrous metal ash by metering equipment according to the mass fraction (namely mass percentage) of the raw materials; further, limestone: 87.0-92.0%, clay: 3.0-6.5%, municipal solid waste incineration bottom slag 1.0-4.0%, non-ferrous metal ash: 2.0 to 5.0 percent; further, the limestone: 88.0-91.0%, clay: 3.0-6.0%, municipal solid waste incineration bottom slag 1.0-3.5%, non-ferrous metal ash: 3.0 to 4.5 percent; the metering equipment is conventional equipment, such as an electronic belt scale;
(3) preparation of raw materials: sending the mixture prepared in the step (2) into a raw material mill through a conveying device for grinding until the sieved residue of a square-hole sieve with the diameter of 0.08mm is less than 18.0 percent to obtain raw material powder, and sending the raw material powder into a raw material warehouse for storage and homogenization; further, the conveying device is a conventional conveying device, such as a belt conveyor, and the raw material mill is a conventional raw material mill, such as a tube mill, a vertical mill or a roller press;
(4) preparing coal powder: the bituminous coal is sent into a coal mill for grinding through a conveying device until the sieved residue of a square-hole sieve with the diameter of 0.08mm is less than 12.0 percent to obtain coal powder, and the coal powder is sent into two coal powder bins for burning in a rotary kiln and a decomposing furnace; further, the conveying equipment is conventional conveying equipment, such as a Roots blower, and the coal mill is a conventional coal mill, such as a tube mill, a vertical mill and the like;
further, the quality requirements of the bituminous coal in the step (4) are as follows:
air drying base moisture Mad: 1.0 to 2.5 percent of the total weight of the mixture,
air-dried base ash Aad: 18.0 to 34.5 percent of the total weight of the mixture,
air drying base volatiles Vad: 22.0 to 31.0 percent of the total weight of the mixture,
ad, air-dried coal low calorific value Qnet: 21000-25000 kJ/kg;
(5) calcining clinker: conveying the raw materials in a raw material warehouse to a preheater, a decomposing furnace and a rotary kiln through a metering and conveying device to carry out a calcining process, and simultaneously respectively spraying pulverized coal obtained by pulverizing bituminous coal into powder into the head of the decomposing furnace and the head of the rotary kiln to participate in calcining, wherein the decomposition temperature in the decomposing furnace is 870-; further, the metering is called a conventional metering scale, such as a punching plate flow scale, a rotor scale and the like;
further, the total feeding amount of the coal dust in the step (5) is 8.0-13.0% by mass of the raw materials, and further the total feeding amount of the coal dust is 9.0-11.0% by mass of the clinker;
further, the coal powder in the step (5) comprises the following components in percentage by mass:
SiO2： 42.0-55.0％，
Al2O3： 30.0-42.3％，
Fe2O3： 3.6-6.8％，
CaO： 4.0-8.0％，
MgO： 0.5-3.0％；
(6) cooling clinker: the clinker in the rotary kiln is discharged from the rotary kiln and then enters a grate cooler for cooling, the temperature of the cooled clinker is 50-120 ℃, and the cooled clinker is discharged from the grate cooler and then is crushed and then is conveyed to a clinker storage room.
The invention can effectively reduce the proportion of siliceous raw material clay, increase the use of municipal solid waste incineration bottom slag, is suitable for cement clinker production, and has unchanged performance.
Example 1
The cement clinker is prepared by calcining raw materials prepared by replacing part of clay with municipal solid waste incineration bottom slag, wherein the raw materials corresponding to the clinker comprise the following components in percentage by mass:
limestone: 89.0 percent of the total weight of the mixture,
clay: 6.2 percent of the total weight of the mixture,
municipal solid waste incineration bottom slag: 1.5 percent of the total weight of the mixture,
non-ferrous metal ash: 3.3 percent of the total weight of the mixture,
the specific mass of each component is as follows (in mass percent), and part of trace components are not listed:
the specific mass conditions of the clinker are as follows (in mass percentage), and part of trace components are not listed, wherein the adding amount of the coal dust is 9.54% of the mass of the raw materials:
the clinker quality control index value is as follows: KH of 1.040 plus or minus 0.02, SM of 2.90 plus or minus 0.1 and IM of 1.05 plus or minus 0.1, thereby ensuring that the clinker quality meets the requirement of cement production. The physical property and quality conditions of the clinker for cement are as follows:
compared with the conventional clinker for ordinary cement in the current market (manufacturer: Zhejiang tiger eagle cement Co., Ltd.), the cement product obtained in the embodiment has the following results according to GB/T176-2017 (method for analyzing cement chemistry), GB/T17671-1999 (method for testing cement mortar strength), GB/T1346-2011 (method for testing water consumption, setting time and stability for standard consistency of cement):
the compressive strength of the cement clinker in the embodiment is 30.2MPa and 59.1MPa in 3 days and 28 days respectively. Compared with the conventional normal production of cement clinker, the method is basically consistent; this example demonstrates that it can be used in cement clinker production applications.
The preparation method of the calcined cement clinker by replacing part of clay with the municipal solid waste incineration bottom slag comprises the following steps:
(1) crushing raw materials: respectively crushing large limestone and clay by using a crusher, wherein the granularity of the materials is required to be less than 30mm and is not less than 85%, and after the limestone and the clay are crushed, the crushed limestone and clay, municipal solid waste incineration bottom slag, non-ferrous metal ash and the like are respectively conveyed to respective homogenizing storehouses through conveying equipment for storage and homogenization; the conveying equipment is conventional equipment, such as a belt conveyor;
(2) raw material proportioning: mixing limestone, clay, municipal solid waste incineration bottom slag and non-ferrous metal ash slag according to the mass percentage by metering equipment; the metering equipment is conventional equipment, such as an electronic belt scale;
(3) preparation of raw materials: sending the mixture prepared in the second step into a raw material mill through a conveying device for grinding until the sieved residue of a square-hole sieve with the diameter of 0.08mm is less than 18.0 percent to obtain raw material powder, and sending the raw material powder into a raw material warehouse for storage and homogenization; the conveying equipment is conventional conveying equipment such as a belt conveyor, and the raw material mill is a conventional raw material mill such as a tube mill, a vertical mill or a roller press;
(4) preparing coal powder: the bituminous coal is sent into a coal mill for grinding through a conveying device, the bituminous coal is ground until the sifting residue of a square-hole sieve with the diameter of 0.08mm is less than 12.0 percent to obtain coal powder, the coal powder is sent into two coal powder bins for burning of a calcining and decomposing furnace in a rotary kiln, the conveying device is a conventional conveying device such as a Roots blower, and the coal mill is a conventional coal mill such as a tube mill, a vertical mill and the like;
(5) calcining clinker: conveying the raw materials in a raw material warehouse to a preheater, a decomposing furnace and a rotary kiln through a weighing and conveying device to carry out a calcining process, and simultaneously respectively spraying coal powder into kiln heads of the decomposing furnace and the rotary kiln to participate in calcining, wherein the adding amount of the coal powder is 4.2 percent of the mass of clinker, namely the adding amount of the coal powder is 9.54 percent of the mass of the raw materials, the decomposing temperature in the decomposing furnace is 880 ℃, and the firing temperature in the rotary kiln is 1450 ℃; the metering is called a conventional metering scale, such as a punching plate flow scale, a rotor scale and the like;
(6) cooling clinker: and (3) cooling the clinker in the kiln in the grate cooler after the clinker exits the rotary kiln, wherein the temperature of the cooled clinker is less than 120 ℃, and the cooled clinker exits the grate cooler and is crushed and then conveyed to a clinker storage room.
Example 2
The cement clinker calcined by replacing partial clay with municipal solid waste incineration bottom slag adopts the method that the municipal solid waste incineration bottom slag replaces partial clay, wherein the corresponding raw materials of the clinker comprise the following components in percentage by mass:
limestone: 88.8 percent of the total weight of the mixture,
clay: 5.7 percent of the total weight of the mixture,
municipal solid waste incineration bottom slag: 2.0 percent of the total weight of the mixture,
non-ferrous metal ash: 3.5 percent of the total weight of the mixture,
the specific mass of each component is as follows (in mass percent), and part of trace components are not listed:
the specific quality of the clinker is as follows (in percentage by mass), and part of trace components are not listed, wherein the adding amount of coal is 9.54% of the mass of the raw meal:
the clinker quality control index value is as follows: KH:1.040 +/-0.02, SM:2.90 +/-0.1, IM: 1.07 +/-0.1, and ensures that the quality of the clinker meets the requirement of cement production. The physical property and quality conditions of the clinker for cement are as follows:
the preparation method of the municipal solid waste incineration bottom slag for replacing part of clay to calcine the cement clinker is based on the embodiment 1 and carries out part of condition modification, and the modification content is as follows: the clinker components are basically similar, the municipal solid waste incineration bottom slag rises by 0.5 percent, the clay falls by 0.5 percent, the limestone falls by 0.2 percent, the nonferrous metal ash increases by 0.2 percent, and the compressive strength of the clinker on the 3 rd day and the 28 th day is basically consistent with that of the clinker in the example 1.
Example 3
The cement clinker calcined by replacing partial clay with municipal solid waste incineration bottom slag adopts the method that the municipal solid waste incineration bottom slag replaces partial clay, wherein the corresponding raw materials of the clinker comprise the following components in percentage by mass:
limestone: 89.1 percent of the total weight of the mixture,
clay: 5.2 percent of the total weight of the mixture,
municipal solid waste incineration bottom slag: 2.5 percent of the total weight of the mixture,
non-ferrous metal ash: 3.2 percent of the total weight of the mixture,
the specific mass of each component is as follows (in mass percent), and part of trace components are not listed:
the specific quality of the clinker is as follows (in percentage by mass), and part of trace components are not listed, wherein the adding amount of coal is 9.53% of the mass of the raw meal:
the clinker quality control index value is as follows: KH:1.00 + -0.02, SM:2.90 + -0.1, IM: 1.07 +/-0.1, and ensures that the quality of the clinker meets the requirement of cement production. The physical property and quality conditions of the clinker for cement are as follows:
the preparation method of the municipal solid waste incineration bottom slag for replacing part of clay to calcine the cement clinker is based on the embodiment 1 and carries out part of condition modification, and the modification content is as follows: the clinker components are basically similar, the municipal solid waste incineration bottom slag is increased by 1.0 percent, the clay is reduced by 1.0 percent, the limestone is increased by 0.1 percent, the non-ferrous metal ash is reduced by 0.1 percent, and the compressive strength of the clinker is basically consistent with that of the clinker in the example 1 in 3 days and 28 days.
When the method is used, attention needs to be paid, the adding proportion of the municipal solid waste incineration bottom slag needs to be controlled and tracked, the adding proportion is less than 4.0 percent, and if the adding amount exceeds 4 percent, the bad phenomena of preheater skinning, ring formation in a kiln and the like can be generated.
The relative quality of the conventional clinker and the clinker of the different municipal solid waste incineration bottom slag blending ratios of the examples 1 to 3 are summarized to obtain the data shown in the following table:
from the data in the table, it is known that the quality of the clinker produced by increasing the proportion of the municipal solid waste incineration bottom slag and decreasing the proportion of the clay has no obvious difference from the quality of the clinker produced by using clay without adding the municipal solid waste incineration bottom slag in all the examples 1, 2 and 3. Therefore, the invention applies the bottom slag of the municipal solid waste incineration to produce the clinker, so that the use of clay resources can be reduced, and the production cost is reduced; meanwhile, the utilization way of the municipal solid waste incineration bottom slag is widened, the stacking and the external discharge of waste production enterprises are reduced, the resource recycling is realized, and the requirements of environmental protection are met.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (10)
1. The cement clinker calcined by replacing part of clay with municipal solid waste incineration bottom slag is characterized in that raw materials of the cement clinker are prepared by replacing part of clay with municipal solid waste incineration bottom slag, and the raw materials of the raw materials comprise the following components in parts by mass:
2. the method for calcining the cement clinker by replacing part of clay with the municipal solid waste incineration residue as claimed in claim 1, wherein the raw materials of the raw materials comprise the following components in parts by mass:
3. the method for calcining cement clinker by replacing part of clay with municipal solid waste incineration residue as claimed in claim 1, wherein the municipal solid waste incineration residue comprises the following components in parts by mass:
4. the method for calcining the cement clinker by replacing part of the clay with the municipal solid waste incineration residue as claimed in claim 1, wherein the mixed raw material obtained by mixing the raw materials of the raw material comprises the following components in percentage by mass:
5. the cement clinker calcined by replacing part of clay with municipal solid waste incineration residue according to claim 1, characterized in that the clinker comprises the following components in mass fraction:
6. the cement clinker calcined by replacing part of clay with municipal solid waste incineration residue according to claim 1, characterized in that the mineral composition of the clinker and the corresponding clinker values comprise the following components:
7. the method for preparing the cement clinker by calcining the municipal solid waste incineration residue instead of part of clay according to any one of claims 1 to 6, is characterized by comprising the following steps:
(1) crushing raw materials: respectively crushing limestone and clay, and respectively conveying the crushed limestone, the municipal solid waste incineration bottom slag and non-ferrous metal ash to respective homogenizing storehouses for storage and homogenization;
(2) raw material proportioning: mixing limestone, clay, municipal solid waste incineration bottom slag and non-ferrous metal ash according to the mixing ratio of raw material mass fraction;
(3) preparation of raw materials: grinding the mixture prepared in the step (2) to obtain raw material powder, and sending the raw material powder into a raw material warehouse for storage and homogenization;
(4) preparing coal powder: grinding bituminous coal to obtain coal powder, and feeding the coal powder into a corresponding coal powder bin;
(5) calcining clinker: and conveying the raw materials in the raw material warehouse to a preheater, a decomposing furnace and a rotary kiln for calcination, simultaneously spraying coal powder into the decomposing furnace and the rotary kiln respectively to participate in calcination, and obtaining cement clinker after calcination.
8. The method for preparing cement clinker by calcining municipal solid waste incineration bottom slag instead of part of clay according to claim 7, wherein the total input of the pulverized coal in the step (5) is 8.0-13.0% by mass of the raw meal.
9. The method as claimed in claim 7, wherein in the step (5), the decomposition temperature in the decomposition furnace is 870-900 ℃ and the burning temperature in the rotary kiln is 1250-1450 ℃.
10. The method for preparing cement clinker by calcining municipal solid waste incineration bottom slag instead of part of clay according to claim 7, further comprising the step (6) of cooling the clinker: and (5) cooling the clinker in the rotary kiln to the clinker temperature of 50-120 ℃ after the clinker is discharged from the rotary kiln, and conveying the cooled clinker to a clinker storage bin after the cooled clinker is crushed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111413126.8A CN113998910A (en) | 2021-11-25 | 2021-11-25 | Calcining clinker for replacing partial clay with municipal solid waste incineration bottom slag and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111413126.8A CN113998910A (en) | 2021-11-25 | 2021-11-25 | Calcining clinker for replacing partial clay with municipal solid waste incineration bottom slag and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113998910A true CN113998910A (en) | 2022-02-01 |
Family
ID=79930356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111413126.8A Pending CN113998910A (en) | 2021-11-25 | 2021-11-25 | Calcining clinker for replacing partial clay with municipal solid waste incineration bottom slag and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113998910A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624639A (en) * | 2020-12-22 | 2021-04-09 | 临沂中联水泥有限公司 | Method for producing cement by treating dangerous waste through kiln head burner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337776A (en) * | 2007-07-06 | 2009-01-07 | 郑州大学 | Process directly for producing concrete with residual ash slag after separating domestic garbage |
| CN101386480A (en) * | 2008-10-15 | 2009-03-18 | 华南理工大学 | Method for producing portland cement clinker using domestic waste incineration residue |
| JP2010195601A (en) * | 2009-02-23 | 2010-09-09 | Taiheiyo Cement Corp | Cement composition |
| JP2013241304A (en) * | 2012-05-21 | 2013-12-05 | Tokuyama Corp | Cement composition and method for producing the same |
| CN105800973A (en) * | 2016-03-30 | 2016-07-27 | 北京建筑材料科学研究总院有限公司 | Method for preparing cement from municipal solid waste incineration furnace slag |
| CN112250330A (en) * | 2020-09-11 | 2021-01-22 | 邓州中联水泥有限公司 | Green environment-friendly cement and preparation method thereof |
| CN112341014A (en) * | 2020-11-06 | 2021-02-09 | 浙江虎鹰水泥有限公司 | Retarding clinker and preparation method thereof |
-
2021
- 2021-11-25 CN CN202111413126.8A patent/CN113998910A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337776A (en) * | 2007-07-06 | 2009-01-07 | 郑州大学 | Process directly for producing concrete with residual ash slag after separating domestic garbage |
| CN101386480A (en) * | 2008-10-15 | 2009-03-18 | 华南理工大学 | Method for producing portland cement clinker using domestic waste incineration residue |
| JP2010195601A (en) * | 2009-02-23 | 2010-09-09 | Taiheiyo Cement Corp | Cement composition |
| JP2013241304A (en) * | 2012-05-21 | 2013-12-05 | Tokuyama Corp | Cement composition and method for producing the same |
| CN105800973A (en) * | 2016-03-30 | 2016-07-27 | 北京建筑材料科学研究总院有限公司 | Method for preparing cement from municipal solid waste incineration furnace slag |
| CN112250330A (en) * | 2020-09-11 | 2021-01-22 | 邓州中联水泥有限公司 | Green environment-friendly cement and preparation method thereof |
| CN112341014A (en) * | 2020-11-06 | 2021-02-09 | 浙江虎鹰水泥有限公司 | Retarding clinker and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陈蕾等: "城市生活垃圾成分及其波动对水泥窑的影响分析", 《水泥》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624639A (en) * | 2020-12-22 | 2021-04-09 | 临沂中联水泥有限公司 | Method for producing cement by treating dangerous waste through kiln head burner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103159483B (en) | Industrial waste residue ceramsite and preparation method thereof | |
| CN101928824B (en) | Sintered ore production method capable of reducing sintered solid fuel consumption and improving strength | |
| CN104926163A (en) | Portland cement clinker and preparation method thereof | |
| CN102757211A (en) | Aerated concrete block produced through using specially-made mineral waste residue and tailings steel slag and production method of aerated concrete block | |
| CN103435281A (en) | Cement clinker and preparation process thereof | |
| CN103553377B (en) | Method for producing silicate clinker by using yellow phosphorus slag to replace part of clay | |
| CN112851152B (en) | Cement clinker and cement prepared from lead-zinc smelting furnace slag and preparation method thereof | |
| CN102249575A (en) | Application of waste tailing silicon powder from beneficiation as raw material for preparing portland cement | |
| CN101462838A (en) | Method for producing cement clinker from coal gangue and metal tailing substituting clay ingredient | |
| CN102649628B (en) | Method for producing super-low-alkali silicate cement clinker by using industrial waste residue on 5KT/D dry-process kiln | |
| CN112341014B (en) | Retarding clinker and preparation method thereof | |
| CN113121131A (en) | Cement clinker produced by using low-grade marble limestone and preparation method thereof | |
| CN101870565B (en) | Concrete compounded mineral admixture and preparation method thereof | |
| CN113998910A (en) | Calcining clinker for replacing partial clay with municipal solid waste incineration bottom slag and preparation method thereof | |
| CN110104971A (en) | A kind of clinker processing technology and clinker | |
| CN111187012A (en) | Process for producing cement by using lithium slag as cement admixture instead of partial water slag | |
| CN106277872A (en) | The application in producing clinker of the iron cement containing caloric value | |
| CN104108892A (en) | Method for producing lightweight partition batten by recycling industrial slag and building garbage | |
| CN115231837B (en) | 32.5 low-alkali masonry cement with large mixing amount of low-grade limestone and preparation method thereof | |
| CN112358207A (en) | Cement clinker doped with tailing slag and ash slag and preparation method thereof | |
| CN102627435B (en) | Paper pulp waste residue steam-pressing brick and preparation method thereof | |
| CN108525608A (en) | A method of producing calcium carbide coke powder mix and convert calcium lime powder pressure ball molding | |
| CN114990329A (en) | Method for preparing high-strength lightweight aggregate by pellet roasting method | |
| CN114538809A (en) | Application of pulverized fuel ash with calorific value | |
| CN107540250A (en) | A kind of Pre-sorting slag split-phase clinker cement production technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220201 |
|
| RJ01 | Rejection of invention patent application after publication |