CN104003633A - Preparation method of silicate clinker and cement and rotary kiln for preparing silicate clinker - Google Patents
Preparation method of silicate clinker and cement and rotary kiln for preparing silicate clinker Download PDFInfo
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- CN104003633A CN104003633A CN201410238128.1A CN201410238128A CN104003633A CN 104003633 A CN104003633 A CN 104003633A CN 201410238128 A CN201410238128 A CN 201410238128A CN 104003633 A CN104003633 A CN 104003633A
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- raw material
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- portland cement
- cement clinker
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- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 title abstract description 8
- 239000004568 cement Substances 0.000 title description 6
- 239000002994 raw material Substances 0.000 claims abstract description 110
- 238000001354 calcination Methods 0.000 claims abstract description 72
- 239000002893 slag Substances 0.000 claims abstract description 27
- 239000003469 silicate cement Substances 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000227 grinding Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 9
- 239000010440 gypsum Substances 0.000 claims abstract description 9
- 239000011398 Portland cement Substances 0.000 claims description 62
- 239000011499 joint compound Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 238000000354 decomposition reaction Methods 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- 239000000446 fuel Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 238000003837 high-temperature calcination Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 239000010703 silicon Substances 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 2
- 235000019738 Limestone Nutrition 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 18
- 239000000378 calcium silicate Substances 0.000 description 17
- 229910052918 calcium silicate Inorganic materials 0.000 description 17
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 17
- 230000006835 compression Effects 0.000 description 13
- 238000007906 compression Methods 0.000 description 13
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000001506 calcium phosphate Substances 0.000 description 3
- 229940038472 dicalcium phosphate Drugs 0.000 description 3
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 235000021321 essential mineral Nutrition 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- Treatment Of Sludge (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to the technical field of building materials and particularly relates to a preparation method of a silicate clinker. The preparation method comprises the following steps: mixing a raw material red mud, limestones, an irony raw material, a silicon raw material and an aluminum raw material, and grinding to prepare a raw material; conveying the raw material to a preheater of the rotary kiln to be pre-heated so as to enter into a decomposing furnace to be primarily decomposed, and combusting the primarily decomposed raw material in the rotary kiln; calcining and cooling to form the silicate clinker. The invention further relates to a preparation method of silicate cement. The preparation method comprises the following steps: mixing 45-85% of silicate clinker, 0-40% of red mud, 2-10% of gypsum and 4-13% of slags in percentage by weight and grinding to prepare the silicate cement. The preparation method provided by the invention better utilizes industrial solid waste red mud, realizes resource reuse and meanwhile, improves the combusting burnability of the silicate clinker, reduces the energy consumption of the silicate clinker and improves the compressive property of the silicate cement.
Description
Technical field
The present invention relates to building materials technology field, relate in particular to the preparation method of a kind of portland cement clinker and cement and prepare the rotary kiln of portland cement clinker.
Background technology
At present, along with the revision of China < < total utilization of PCA management method > > and the enforcement of encouragement support policy, total utilization of PCA industry is rapidly developed, and flyash extracts alumina producing technology and obtained wideling popularize.Utilizing flyash to extract in aluminum oxide production process, the solid waste red mud that flyash grog produces after stripping aluminum oxide (calcium silicate slag), its output is larger, 1 ton of aluminum oxide of every production, 8～10 tons of red muds of about output (calcium silicate slag).This material essential mineral consists of Y-Dicalcium Phosphate (Feed Grade), can be used as portland cement clinker calcining raw material, replaces part Wingdale and siliceous, aluminum raw material.China's portland cement clinker is produced and be take Wingdale as main raw material(s), account for proportion scale more than 70%, along with the development of building materials industry, resource is nervous, the problem of cost up also will become increasingly conspicuous, and substitute or the part substitute of actively finding Wingdale have become trend.
Red mud (calcium silicate slag) is by Y-Dicalcium Phosphate (Feed Grade), from efflorescence, to be formed in alumina clinker calcination process, its mineral composition and portland cement clinker are close, except Y-Dicalcium Phosphate (Feed Grade), also have the mineral substance such as the free calcium oxide of part and a small amount of calcite, mullite, have that calcium oxide content is high, alkali content is low, active good characteristic, contain 15%～20% silicon oxide composition and 3%～6% aluminum oxide composition simultaneously.Wingdale in alternative portland cement clinker calcining and part siliceous raw material, aluminum raw material.How effective and reasonable processing, development and utilization, realization is turned waste into wealth, and has realistic meaning, to advancing the enforcement of China's total utilization of PCA, plays a positive role.
Summary of the invention
For above-mentioned technical problem, the present invention has designed and developed the preparation method of portland cement clinker and cement and has prepared the rotary kiln of portland cement clinker, object is better utilised industrial solid castoff red mud (calcium silicate slag), realize resource reutilization, improve the burn-ability of portland cement clinker calcining simultaneously, reduce the energy consumption of portland cement clinker; Improve the heating efficiency of rotary kiln and the compressive property of silicate cement.
Technical scheme provided by the invention is:
A preparation method for portland cement clinker, comprising:
Step 1, raw material red mud (calcium silicate slag), Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are respectively to 30%～83%, 10%～75%, 0～5%, 0～10% and 0～5% with mass percent mix, after grinding, make raw material;
Step 2, by above-mentioned raw material conveyor to preheating in the preheater of rotary kiln, then enter predecomposition furnace and decompose for the first time, the raw material after first decomposition enter calcining in rotary kiln, 1200 ℃～1400 ℃ of calcining temperatures, calcination time 5～45min;
Step 3, calcining finish cooling rear formation portland cement clinker.
Preferably, in the preparation method of described portland cement clinker, in described step 1, described red mud (calcium silicate slag), Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are respectively 40%～65%, 33%～50%, 2～3%, 3～5% and 0～2% with mass percent to be mixed.
A kind of preparation method of silicate cement, comprise: portland cement clinker, red mud (calcium silicate slag), gypsum and slag are respectively to 45%～85%, 0%～40%, 2～10% and 4～13% with mass percent and mix, after grinding, make silicate cement.
Preferably, in the preparation method of described silicate cement, the mass percent of described portland cement clinker, red mud (calcium silicate slag), gypsum and slag is respectively 55%～75%, 10%～30%, 5% and 10%.
A rotary kiln of preparing portland cement clinker, comprising:
Preheater, it comprises n cyclone cylinder, n-1 airduct, a tremie pipe, a decomposing furnace and a kiln tail smoke-box, each cyclone cylinder connects successively by described airduct, last cyclone cylinder is communicated with described decomposing furnace by tremie pipe, described decomposing furnace connects described kiln tail smoke-box, raw material red mud, Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are formulated as raw material, with the fuel mix that enters decomposing furnace, preheating, raw material are carried by high velocity air, be suspended in decomposing furnace, fuel is with the upwards running of eddy flow of air-flow, one side is burnt, decompose, the burning exothermic process of fuel and the thermal endothermic decomposition process of raw material are carried out rapidly simultaneously under suspended state, raw material complete material and tentatively decompose before entering calcining furnace,
Calcining furnace, it is communicated with decomposing furnace, and the material after preliminary decomposition carries out high-temperature calcination in described calcining furnace, and high-temperature calcination divides two stages to carry out, first stage is at 1200～1300 ℃ of calcining 5～15min, and subordinate phase is at 1300～1400 ℃ of calcining 10～30min;
Cooler, obtains portland cement clinker after the material after calcining is cooling in cooler;
Wherein, described cyclone cylinder is all inverted taper shape, and n cyclone cylinder from top to bottom cone angle is decreased to 50 ° successively from 80 °, the discharge port of adjacent two cyclone cylinders is communicated with opening for feed sealing, on the opening for feed of the cyclone cylinder below being positioned at, be provided with a baffle plate, on described baffle plate, offer opening for feed, described opening for feed is equipped with the discharge port that is positioned at the adjacent cyclone cylinder of top.
Preferably, in the described rotary kiln of preparing portland cement clinker, be provided with the upwards high-temperature flue gas heat exchange pipeline of operation in described cyclone cylinder, described high-temperature flue gas heat exchange pipeline is set to volution,
Wherein, through the discharge port of adjacent two cyclone cylinders and the high-temperature flue gas heat exchange pipeline at opening for feed place, be set to cylindrical.
Preferably, in the described rotary kiln of preparing portland cement clinker, n value is arranged between 2～6.
The preparation method of portland cement clinker of the present invention and cement and preparing in the rotary kiln of portland cement clinker, adopt new dry process precalciner kiln burning silicate raw material, by controlling the conditions such as the proportioning of red mud (calcium silicate slag) and Wingdale and the calcining temperature in calcination process, calcination time, realize the phase control to portland cement clinker.Due to adding of red mud (calcium silicate slag), material burn-ability is good, and material calcining temperature is low compared with traditional proportioning calcining temperature, calcination time is short, thereby reduces calcination of chamotte energy consumption.Through test, grog Energy Intensity Reduction 30%, unit-hour output can improve 10%.The cyclone cylinder of rotary kiln is set to a plurality of inverted conical structures that cone angle reduces from top to bottom gradually simultaneously, more be conducive to the conveying of material, and high-temperature flue gas heat exchange pipeline is set to volution, increased the heat interchanging area of material and high-temperature flue gas, the burning exothermic process of fuel and the thermal endothermic decomposition process of raw material are carried out rapidly simultaneously under suspended state, be conducive to the decomposition of material, take full advantage of the heat of fuel combustion.
Accompanying drawing explanation
Fig. 1 is the preparation method's of portland cement clinker of the present invention schematic flow sheet.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to specification sheets word.
Comparative example
A preparation method for portland cement clinker, comprising:
Press lime saturation factor 0.667, silicon rate 3.5, the aluminium rate 2.2 preparation raw material of grog, at 1230 ℃, calcine 1 hour, be cooled to room temperature, make portland cement clinker.
A preparation method for silicate cement, comprising:
Slag, natural anhydrite and portland cement clinker are respectively to 86%, 13% and 1% mixing, grinding with mass percent, make silicate cement.The ultimate compression strength of 3 days, 7 days, 28 days according to GB17671-1999 < < cement gel yarn intensity method of inspection > > determination test is respectively 16.4MPa, 18.1MPa, 22.6MPa.
Embodiment 1
The preparation method who the invention provides a kind of portland cement clinker, comprising:
Step 1, raw material red mud (calcium silicate slag), Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are respectively to 30%, 63%, 3%, 5% and 2% with mass percent mix, after grinding, make raw material;
Step 2, by above-mentioned raw material conveyor to preheating in the preheater of rotary kiln, then enter predecomposition furnace and decompose for the first time, the raw material after first decomposition enter calcining in rotary kiln, 1200 ℃～1400 ℃ of calcining temperatures, calcination time 5～45min;
Step 3, calcining finish cooling rear formation portland cement clinker.
A kind of preparation method of silicate cement, comprise: portland cement clinker, gypsum and slag are respectively to 85%, 2% and 4% with mass percent and mix, after grinding, make silicate cement, recording ultimate compression strength after 3 days is 27.5MPa, after 7 days, ultimate compression strength is 38.5MPa, and after 28 days, ultimate compression strength is 59.1MPa.
A rotary kiln of preparing portland cement clinker, comprising:
Preheater, it comprises 2 cyclone cylinders, 1 airduct, a tremie pipe, a decomposing furnace and a kiln tail smoke-box, each cyclone cylinder connects successively by described airduct, last cyclone cylinder is communicated with described decomposing furnace by tremie pipe, described decomposing furnace connects described kiln tail smoke-box, raw material red mud, Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are formulated as raw material, with the fuel mix that enters decomposing furnace, preheating, raw material are carried by high velocity air, be suspended in decomposing furnace, fuel is with the upwards running of eddy flow of air-flow, one side is burnt, decompose, the burning exothermic process of fuel and the thermal endothermic decomposition process of raw material are carried out rapidly simultaneously under suspended state, raw material complete material and tentatively decompose before entering calcining furnace,
Calcining furnace, it is communicated with decomposing furnace, and the material after preliminary decomposition carries out high-temperature calcination in described calcining furnace, and high-temperature calcination divides two stages to carry out, and the first stage is at 1200 ℃ of calcining 5min, subordinate phase is at 1300 ℃ of calcining 10min
Cooler, obtains portland cement clinker after the material after calcining is cooling in cooler;
Wherein, described cyclone cylinder is all inverted taper shape, and 2 cyclone cylinders from top to bottom cone angle are decreased to 70 ° from 80 °, the discharge port of adjacent two cyclone cylinders is communicated with opening for feed sealing, on the opening for feed of the cyclone cylinder below being positioned at, be provided with a baffle plate, on described baffle plate, offer opening for feed, described opening for feed is equipped with the discharge port that is positioned at the adjacent cyclone cylinder of top.
In the described rotary kiln of preparing portland cement clinker, be provided with the upwards high-temperature flue gas heat exchange pipeline of operation in described cyclone cylinder, described high-temperature flue gas heat exchange pipeline is set to volution,
Wherein, through the discharge port of adjacent two cyclone cylinders and the high-temperature flue gas heat exchange pipeline at opening for feed place, be set to cylindrical.
Embodiment 2
The preparation method who the invention provides a kind of portland cement clinker, comprising:
Step 1, raw material red mud (calcium silicate slag), Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are respectively to 40%, 50%, 3%, 5% and 2% with mass percent mix, after grinding, make raw material;
Step 2, by above-mentioned raw material conveyor to preheating in the preheater of rotary kiln, then enter predecomposition furnace and decompose for the first time, the raw material after first decomposition enter calcining in rotary kiln, 1200 ℃～1400 ℃ of calcining temperatures, calcination time 5～45min;
Step 3, calcining finish cooling rear formation portland cement clinker.
A kind of preparation method of silicate cement, comprise: portland cement clinker, red mud (calcium silicate slag), gypsum and slag are respectively to 75%, 10%, 5% and 7% with mass percent and mix, after grinding, make silicate cement, recording ultimate compression strength after 3 days is 30.8MPa, after 7 days, ultimate compression strength is 39.2MPa, and after 28 days, ultimate compression strength is 60.1MPa.
A rotary kiln of preparing portland cement clinker, comprising:
Preheater, it comprises 3 cyclone cylinders, 2 airducts, a tremie pipe, a decomposing furnace and a kiln tail smoke-box, each cyclone cylinder connects successively by described airduct, last cyclone cylinder is communicated with described decomposing furnace by tremie pipe, described decomposing furnace connects described kiln tail smoke-box, raw material red mud, Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are formulated as raw material, with the fuel mix that enters decomposing furnace, preheating, raw material are carried by high velocity air, be suspended in decomposing furnace, fuel is with the upwards running of eddy flow of air-flow, one side is burnt, decompose, the burning exothermic process of fuel and the thermal endothermic decomposition process of raw material are carried out rapidly simultaneously under suspended state, raw material complete material and tentatively decompose before entering calcining furnace,
Calcining furnace, it is communicated with decomposing furnace, and the material after preliminary decomposition carries out high-temperature calcination in described calcining furnace, and high-temperature calcination divides two stages to carry out, and the first stage is at 1250 ℃ of calcining 8min, subordinate phase is at 1330 ℃ of calcining 15min;
Cooler, obtains portland cement clinker after the material after calcining is cooling in cooler;
Wherein, described cyclone cylinder is all inverted taper shape, and 3 cyclone cylinders from top to bottom cone angle are decreased to 60 ° successively from 80 °, be respectively 80 °, 70 °, 60 °, the discharge port of adjacent two cyclone cylinders is communicated with opening for feed sealing, on the opening for feed of the cyclone cylinder below being positioned at, be provided with a baffle plate, on described baffle plate, offer opening for feed, described opening for feed is equipped with the discharge port that is positioned at the adjacent cyclone cylinder of top.
In the described rotary kiln of preparing portland cement clinker, be provided with the upwards high-temperature flue gas heat exchange pipeline of operation in described cyclone cylinder, described high-temperature flue gas heat exchange pipeline is set to volution,
Wherein, through the discharge port of adjacent two cyclone cylinders and the high-temperature flue gas heat exchange pipeline at opening for feed place, be set to cylindrical.
Embodiment 3
The preparation method who the invention provides a kind of portland cement clinker, comprising:
Step 1, raw material red mud (calcium silicate slag), Wingdale, ferriferous raw material and siliceous raw material are respectively to 65%, 33%, 2% and 3% with mass percent mix, after grinding, make raw material;
Step 2, by above-mentioned raw material conveyor to preheating in the preheater of rotary kiln, then enter predecomposition furnace and decompose for the first time, the raw material after first decomposition enter calcining in rotary kiln, 1200 ℃～1400 ℃ of calcining temperatures, calcination time 5～45min;
Step 3, calcining finish cooling rear formation portland cement clinker.
A kind of preparation method of silicate cement, comprise: portland cement clinker, red mud (calcium silicate slag), gypsum and slag are respectively to 55%, 30%, 8% and 10% with mass percent and mix, after grinding, make silicate cement, recording ultimate compression strength after 3 days is 31.1MPa, after 7 days, ultimate compression strength is 40.3MPa, and after 28 days, ultimate compression strength is 60.6MPa.
A rotary kiln of preparing portland cement clinker, comprising:
Preheater, it comprises 4 cyclone cylinders, 3 airducts, a tremie pipe, a decomposing furnace and a kiln tail smoke-box, each cyclone cylinder connects successively by described airduct, last cyclone cylinder is communicated with described decomposing furnace by tremie pipe, described decomposing furnace connects described kiln tail smoke-box, raw material red mud, Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are formulated as raw material, with the fuel mix that enters decomposing furnace, preheating, raw material are carried by high velocity air, be suspended in decomposing furnace, fuel is with the upwards running of eddy flow of air-flow, one side is burnt, decompose, the burning exothermic process of fuel and the thermal endothermic decomposition process of raw material are carried out rapidly simultaneously under suspended state, raw material complete material and tentatively decompose before entering calcining furnace,
Calcining furnace, it is communicated with decomposing furnace, and the material after preliminary decomposition carries out high-temperature calcination in described calcining furnace, and high-temperature calcination divides two stages to carry out, and the first stage is at 1280 ℃ of calcining 12min, subordinate phase is at 1370 ℃ of calcining 20min;
Cooler, obtains portland cement clinker after the material after calcining is cooling in cooler;
Wherein, described cyclone cylinder is all inverted taper shape, and 4 cyclone cylinders from top to bottom cone angle are decreased to 50 ° from 80 °, be respectively 80 °, 70 °, 60 °, 50 °, the discharge port of adjacent two cyclone cylinders is communicated with opening for feed sealing, on the opening for feed of the cyclone cylinder below being positioned at, be provided with a baffle plate, on described baffle plate, offer opening for feed, described opening for feed is equipped with the discharge port that is positioned at the adjacent cyclone cylinder of top.
In the described rotary kiln of preparing portland cement clinker, be provided with the upwards high-temperature flue gas heat exchange pipeline of operation in described cyclone cylinder, described high-temperature flue gas heat exchange pipeline is set to volution,
Wherein, through the discharge port of adjacent two cyclone cylinders and the high-temperature flue gas heat exchange pipeline at opening for feed place, be set to cylindrical.
Embodiment 4
The preparation method who the invention provides a kind of portland cement clinker, comprising:
Step 1, raw material red mud (calcium silicate slag), Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are respectively to 83%, 10%, 2%, 1% and 4% with mass percent mix, after grinding, make raw material;
Step 2, by above-mentioned raw material conveyor to preheating in the preheater of rotary kiln, then enter predecomposition furnace and decompose for the first time, the raw material after first decomposition enter calcining in rotary kiln, 1200 ℃～1400 ℃ of calcining temperatures, calcination time 5～45min;
Step 3, calcining finish cooling rear formation portland cement clinker.
A kind of preparation method of silicate cement, comprise: portland cement clinker, red mud (calcium silicate slag), gypsum and slag are respectively to 45%, 40%, 5% and 13% with mass percent and mix, after grinding, make silicate cement, recording ultimate compression strength after 3 days is 31.9MPa, after 7 days, ultimate compression strength is 41.6MPa, and after 28 days, ultimate compression strength is 62.3MPa.
A rotary kiln of preparing portland cement clinker, comprising:
Preheater, it comprises 6 cyclone cylinders, 5 airducts, a tremie pipe, a decomposing furnace and a kiln tail smoke-box, each cyclone cylinder connects successively by described airduct, last cyclone cylinder is communicated with described decomposing furnace by tremie pipe, described decomposing furnace connects described kiln tail smoke-box, raw material red mud, Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are formulated as raw material, with the fuel mix that enters decomposing furnace, preheating, raw material are carried by high velocity air, be suspended in decomposing furnace, fuel is with the upwards running of eddy flow of air-flow, one side is burnt, decompose, the burning exothermic process of fuel and the thermal endothermic decomposition process of raw material are carried out rapidly simultaneously under suspended state, raw material complete material and tentatively decompose before entering calcining furnace,
Calcining furnace, it is communicated with decomposing furnace, and the material after preliminary decomposition carries out high-temperature calcination in described calcining furnace, and high-temperature calcination divides two stages to carry out, and the first stage is at 1300 ℃ of calcining 15min, subordinate phase is at 1400 ℃ of calcining 30min;
Cooler, obtains portland cement clinker after the material after calcining is cooling in cooler;
Wherein, described cyclone cylinder is all inverted taper shape, and 6 cyclone cylinders from top to bottom cone angle are decreased to 50 ° from 80 °, be respectively 80 °, 75 °, 70 °, 60 °, 55 °, 50 °, the discharge port of adjacent two cyclone cylinders is communicated with opening for feed sealing, on the opening for feed of the cyclone cylinder below being positioned at, be provided with a baffle plate, on described baffle plate, offer opening for feed, described opening for feed is equipped with the discharge port that is positioned at the adjacent cyclone cylinder of top.
In the described rotary kiln of preparing portland cement clinker, be provided with the upwards high-temperature flue gas heat exchange pipeline of operation in described cyclone cylinder, described high-temperature flue gas heat exchange pipeline is set to volution,
Wherein, through the discharge port of adjacent two cyclone cylinders and the high-temperature flue gas heat exchange pipeline at opening for feed place, be set to cylindrical.
Hence one can see that, utilizes the compressive property of silicate cement prepared by method of the present invention to be significantly improved.In four embodiment, the average content SiO of each component in portland cement clinker
2be 21.75%, Al
2o
3be 5.44%, Fe
2o
3be that 3.62%, CaO is that 65.52%, MgO is 2.03%, lime saturation factor is 0.908, and silicon rate is 2.4, and aluminium rate is 1.50.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification sheets and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other modification, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (7)
1. a preparation method for portland cement clinker, is characterized in that, comprising:
Step 1, raw material red mud, Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are respectively to 30%～83%, 10%～75%, 0～5%, 0～10% and 0～5% with mass percent mix, after grinding, make raw material;
Step 2, by above-mentioned raw material conveyor to preheating in the preheater of rotary kiln, then enter predecomposition furnace and decompose for the first time, the raw material after first decomposition enter calcining in rotary kiln, 1200 ℃～1400 ℃ of calcining temperatures, calcination time 5～45min;
Step 3, calcining finish cooling rear formation portland cement clinker.
2. the preparation method of portland cement clinker as claimed in claim 1, it is characterized in that, in described step 1, described red mud, Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are respectively 40%～65%, 33%～50%, 2～3%, 3～5% and 0～2% with mass percent to be mixed.
3. a preparation method for silicate cement, is characterized in that, portland cement clinker, red mud, gypsum and slag is respectively to 45%～85%, 0%～40%, 2～10% and 4～13% with mass percent and mixes, and makes silicate cement after grinding.
4. the preparation method of silicate cement as claimed in claim 3, is characterized in that, the mass percent of described portland cement clinker, red mud, gypsum and slag is respectively 55%～75%, 10%～30%, 5% and 10%.
5. a rotary kiln of preparing portland cement clinker, is characterized in that, comprising:
Preheater, it comprises n cyclone cylinder, n-1 airduct, a tremie pipe, a decomposing furnace and a kiln tail smoke-box, each cyclone cylinder connects successively by described airduct, last cyclone cylinder is communicated with described decomposing furnace by tremie pipe, described decomposing furnace connects described kiln tail smoke-box, raw material red mud, Wingdale, ferriferous raw material, siliceous raw material and aluminum raw material are formulated as raw material, with the fuel mix that enters decomposing furnace, preheating, raw material are carried by high velocity air, be suspended in decomposing furnace, fuel is with the upwards running of eddy flow of air-flow, one side is burnt, decompose, the burning exothermic process of fuel and the thermal endothermic decomposition process of raw material are carried out rapidly simultaneously under suspended state, raw material complete material and tentatively decompose before entering calcining furnace,
Calcining furnace, it is communicated with decomposing furnace, and the material after preliminary decomposition carries out high-temperature calcination in described calcining furnace, and high-temperature calcination divides two stages to carry out, first stage is at 1200～1300 ℃ of calcining 5～15min, and subordinate phase is at 1300～1400 ℃ of calcining 10～30min;
Cooler, obtains portland cement clinker after the material after calcining is cooling in cooler;
Wherein, described cyclone cylinder is all inverted taper shape, and n cyclone cylinder from top to bottom cone angle is decreased to 50 ° successively from 80 °, the discharge port of adjacent two cyclone cylinders is communicated with opening for feed sealing, on the opening for feed of the cyclone cylinder below being positioned at, be provided with a baffle plate, on described baffle plate, offer opening for feed, described opening for feed is equipped with the discharge port that is positioned at the adjacent cyclone cylinder of top.
6. the rotary kiln of preparing portland cement clinker as claimed in claim 6, is characterized in that, is provided with the upwards high-temperature flue gas heat exchange pipeline of operation in described cyclone cylinder, and described high-temperature flue gas heat exchange pipeline is set to volution,
Wherein, through the discharge port of adjacent two cyclone cylinders and the high-temperature flue gas heat exchange pipeline at opening for feed place, be set to cylindrical.
7. the rotary kiln of preparing portland cement clinker as claimed in claim 7, is characterized in that, n value is arranged between 2～6.
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| CN109078964A (en) * | 2018-09-17 | 2018-12-25 | 东莞理工学院 | A kind of Changing Urban Garbage into Resources processing method |
| CN113024134A (en) * | 2021-02-10 | 2021-06-25 | 广东鸿丰水泥有限公司 | Cement preparation process for comprehensively utilizing industrial furnace slag |
| WO2021190045A1 (en) * | 2020-03-27 | 2021-09-30 | 河南理工大学 | High-iron and low-calcium silicate cement and preparation method therefor |
| CN114014567A (en) * | 2021-11-22 | 2022-02-08 | 济南大学 | Method for directly preparing cement clinker from high-alkali red mud |
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| CN113024134A (en) * | 2021-02-10 | 2021-06-25 | 广东鸿丰水泥有限公司 | Cement preparation process for comprehensively utilizing industrial furnace slag |
| CN114014567A (en) * | 2021-11-22 | 2022-02-08 | 济南大学 | Method for directly preparing cement clinker from high-alkali red mud |
| CN114014567B (en) * | 2021-11-22 | 2023-01-24 | 济南大学 | Method for directly preparing cement clinker from high-alkali red mud |
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Denomination of invention: Preparation method of Portland clinker and cement and rotary kiln for preparation of silicate clinker Effective date of registration: 20200818 Granted publication date: 20170125 Pledgee: Ordos Rural Commercial Bank Co.,Ltd. Pledgor: INNER MONGOLIA MENGXI ORDOS ALUMINUM Co.,Ltd. Registration number: Y2020150000042 |
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