CN106746802B - The system and method for sulphate aluminium cement is prepared using municipal waste and Industrial Solid Waste - Google Patents

The system and method for sulphate aluminium cement is prepared using municipal waste and Industrial Solid Waste Download PDF

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CN106746802B
CN106746802B CN201710159952.1A CN201710159952A CN106746802B CN 106746802 B CN106746802 B CN 106746802B CN 201710159952 A CN201710159952 A CN 201710159952A CN 106746802 B CN106746802 B CN 106746802B
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waste
hot water
balancing reservoir
carries out
wet
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CN106746802A (en
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吴长亮
任常在
刘晓斌
刘全勋
王勇
付华辉
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Tai'an Yinglu Research Institute Of New Materials Co Ltd
Shandong Zhuolian Environmental Technology Co Ltd
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Tai'an Yinglu Research Institute Of New Materials Co Ltd
Shandong Zhuolian Environmental Technology Co Ltd
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    • 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
    • C04B7/32—Aluminous cements

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses the system and methods that sulphate aluminium cement is prepared using municipal waste and Industrial Solid Waste, the system includes balancing reservoir, wet grinding machine, filter press, rotary kiln and hot water storage tank, red mud, desulfurized gypsum, carbide slag, wet mud and industry water enter balancing reservoir and are homogenized processing and dealkalize, it enters back into wet grinding machine and carries out grinding, it subsequently enters filter press and carries out mechanism filter-pressing, solid material after filters pressing enters rotary kiln and carries out high-temperature calcination acquisition sulfoaluminate clinker, sulfoaluminate clinker and desulfurized gypsum enter cement grinding machine and carry out combined grinding acquisition sulphate aluminium cement, hot water provides heat for balancing reservoir in hot water storage tank.It realizes and the municipal sludge of high-moisture percentage, Industrial Solid Waste and production high-performance sulphate aluminium cement is perfectly combined the purpose run on a production line.

Description

The system and method for sulphate aluminium cement is prepared using municipal waste and Industrial Solid Waste
Technical field
The present invention relates to chemical industry, the comprehensive utilization of resources of building material technique and large Industrial Solid Waste and municipal sludge and environment guarantors Protect improvement field, and in particular to the system and method for sulphate aluminium cement is prepared using municipal waste and Industrial Solid Waste.
Background technique
Since reform and opening-up, with the rapid development of China's industry and the quickening of urbanization process, and then generate a large amount of each The poisonous and hazardous industrial solid castoff of kind, and its quantity is also constantly rising.Large industrial solid castoff, it is referred to as large Solid waste refers to that China generates 10,000,000 tons or more to environment and the biggish industrial solid of security implication in the field of industrial production middle age Waste mainly includes red mud, desulfurized gypsum, metallurgical slag, CHARACTERISTICS OF TAILINGS SAND and gangue etc..The Eleventh Five-Year Plan period " large solid waste " is always raw 11,800,000,000 tons of yield, always increase 19,000,000,000 tons of storage newly.15,000,000,000 tons of total growth of " large solid waste " during " 12th Five-Year Plan ", total increase newly are deposited Measure 27,000,000,000 tons.
Likewise, increase and popularization with China's urban population, municipal sewage treatment difficulty increasingly increase, according to Official statistics, in by the end of September, 2015 by, national cities and towns have built up 3830 sewage treatment plants, up to 1.62 hundred million m3The sewage of/d Processing capacity, association sludge break through 30,000,000 tons/year.And sludge is that a kind of moisture content for generating in sewage disposal process is very high Waste, ingredient mainly contain the floccule of various microorganisms and organic and inorganic particle composition, have containing largely toxic Evil substance, such as parasitic ovum, pathogenic microorganism and heavy metal ion.In general, the main component after sludge air drying is two Silica, muscovite, alurgite, phengite, kaolin etc., these mineral crystals are mainly by the metals such as aluminium, iron, magnesium member Element composition, and be similar clay, the minerals with fines.Sludge pollution object often has long term toxicity and can not Degradability will enter food chain by media such as big gas and water and soil if untreated and unordered discharge, become dangerous two Secondary source of pollution causes damages to human health and ecology.China generates 30,000,000 ton of -4,000 ten thousand tons of moisture content on 80% left side every year Right municipal sludge, domestic sludge yield in 2015 are 35,000,000 tons.According to " Chinese specific resistance to filtration Market Report (2016 editions) " it is found that national wet mud harmless treatment rate average value in 2015 between 32%, with actual demand there is also compared with Big gap.Therefore, in sewage treatment field, sludge treatment also becomes current a great problem.
Currently used Sludge Disposal Techniques mainly have anaerobic digestion, aerobic fermentation, deep dehydration, heat drying, lime steady Fixed, burning and carbonization etc..But these technologies can not thoroughly, simultaneously realize the minimizing of sludge, stabilisation, it is innoxious with Recycling always generates many contingency questions, for example energy consumption is big, technical operating procedure generates effluvium pollution environment, burns tail Gas generates the problems such as toxic gases such as dioxin etc..
Currently in order to carry out resource utilization to sludge, needs first to carry out deep dehydration to sludge, its moisture content is reduced To 50% or so, however device for dehydrating sladge waste investment is high, and later period operation and maintenance cost is also higher and causes great lot of water resources unrestrained Take.
Summary of the invention
In recent years, sulphate aluminium cement becomes the new direction of domestic and international cement industry research and development, and clinker has A series of superiority such as heat consumption is low, early strength is high, setting time is short, fabulous freeze-thaw resistance required for production, basicity is low Can, it is now widely used in repairing, rush construction engineering, winter construction engineering, anticorrosive engineering.The large solid waste in China and city are dirty Mud volume of cargo in storage is huge, using difficulty height, in order to make at present application is few, volume of cargo in storage city wet mud extremely abundant, red mud with Desulfurized gypsum is fully used, to produce the hydraulic of the excellent properties such as early strong, fast hard, low alkalinity required for architectural engineering Property cementitious material.The present invention is based on the physics between waste, chemical bondings to utilize complementation, provides and utilizes municipal waste and work Industry solid waste prepares the system and method for sulphate aluminium cement, realizes the municipal sludge, Industrial Solid Waste and production of high-moisture percentage High-performance sulphate aluminium cement is perfectly combined the purpose run on a production line.
To achieve the above object, the technical solution of the present invention is as follows:
The method for preparing sulphate aluminium cement using municipal waste and Industrial Solid Waste, the wet dirt that municipal sewage plant generates Mud is fed directly to balancing reservoir without dehydration and red mud, desulfurized gypsum, carbide slag and industry water carry out being mixed to form mixed liquor, mixes The dry weight ratio for closing wet mud in liquid, red mud, desulfurized gypsum and carbide slag is 5~10:15~30:10~20:40~60, keeps mixed Closing the solid-to-liquid ratio in liquid is 1:3~1:4, is homogenized processing and dealkalize, homogenizing again after carrying out wet grinding to the mixed liquor Treatment temperature is 60~70 DEG C, and homogenizing treated material carries out wet grinding, is dehydrated using mechanism filter-pressing, then by filters pressing Material afterwards carries out high-temperature calcination and obtains sulfoaluminate clinker.
Wherein, the desulfurized gypsum before producing clinker is added by above-mentioned dry weight ratio, produces the desulfurization stone after clinker Routinely technique is added cream.
The water content of heretofore described wet mud is 99%.Due to containing a large amount of aluminium, iron, magnesium in the wet mud of city The equal nonmetalloids such as metallic elements and silicon can be carried out with elements such as calcium, sulphur, aluminium in red mud, carbide slag and desulfurized gypsum Chemical complementation, be allowed to it is complementary go out the necessary raw material of sulphate aluminium cement, to make to utilize city wet mud, red in chemical structure Mud, carbide slag and desulfurized gypsum prepare sulphate aluminium cement and are possibly realized.Meanwhile the water content in the wet mud of city is 99%, Contain a large amount of water i.e. in the wet mud of city, carries out solid-liquid using the water and red mud and desulfurized gypsum solid waste of city wet mud The complementation of raw material physical aspect is realized in mixing, not only eliminates the dewatering process of city wet mud processing, reduces city wet mud Dehydration expense and energy consumption, and the water inlet technique inflow of solid material homogenizing processing is reduced, save a large amount of water resource； It realizes that the dewatering process of city wet mud processing is complementary with the technique of water inlet technique of solid material homogenizing processing, has saved technique Process, reduces the cost of waste processing, while can also obtain high performance sulphate aluminium cement.
It is 1:3~1:4 that the present invention, which keeps the solid-to-liquid ratio in balancing reservoir, and wet grinding can be made sufficiently to carry out, both control object Expect fineness, and reduces grinding energy consumption.Homogenizing treatment temperature, which is 60~70 DEG C, can make slurries remove soluble impurity and former red mud Dealkalize.
The purpose of heretofore described homogenizing processing is the soluble impurity removed in material, and removes the oxygen in red mud Change sodium and potassium oxide.
Heretofore described dry weight is that material goes the weight after water completely.
Heretofore described wet grinding is the grinding that material carries out in water.
Heretofore described industry water is by processing applicable waste water up to standard or middle water etc..
Heretofore described desulfurized gypsum is the by-product gypsum after power plant desulfurization.
Heretofore described red mud is the waste red mud of alumina producer discharge.
Preferably, the pressing filtering liquid after filters pressing carries out lime sterilization.
It is further preferred that the solid residue after lime sterilization is delivered to balancing reservoir.
It is further preferred that heat source of the clear liquid after lime sterilization after heating as balancing reservoir.
Preferably, the ingredient after filters pressing, SiO210~25% (wt%) are accounted for, CaO accounts for 30~50% (wt%), Al2O3Account for 15 ~30% (wt%), Fe2O3Account for 5~15% (wt%), SO3Account for 15~35% (wt%).
It is further preferred that basicity factor CmIt is 0.95~0.98.
Wherein, the formula of basicity factor are as follows:
CaO, SiO in formula2、Al2O3、Fe2O3、TiO2、SO3Respectively weight percent shared by corresponding chemical ingredient is (public Described CaO, SiO other than formula2、Al2O3、Fe2O3、TiO2、SO3Respectively corresponding chemical ingredient).
Preferably, the fineness for carrying out the material after wet grinding is less than 0.20mm.
Preferably, heat source of the energy generated using coal dust firing as the high-temperature calcination.
Preferably, 1250 DEG C~1350 DEG C of the calcination temperature of the high-temperature calcination, 0.5~1h of calcination time.
It is further preferred that the high-temperature flue gas that the burning generates carries out waste heat recycling.Waste heat recycling of the present invention Refer to and exchanged the heat in high-temperature flue gas to recirculated water by heat exchange equipment, recirculated water is made to become hot water, realizes and utilize high temperature Thermal energy in flue gas.
Still more preferably, it is discharged after dedusting by waste heat flue gas after the recovery.Solid granule is prevented to be discharged into In air, the reduction of air quality is caused.
Still more preferably, the heat source by waste heat hot water after the recovery as homogenizing processing.It can be improved the energy Effective use reduces production cost.
This method simple process, equipment are reliable, safe and scientific, can thoroughly, simultaneously realize that the city of high-moisture percentage is dirty The minimizing of mud and large solid waste, stabilisation, innoxious and recycling, and great lot of water resources and the energy can be saved, to can produce Raw huge environmental benefit, economic benefit and social benefit.
The system for preparing sulphate aluminium cement using municipal waste and Industrial Solid Waste, including balancing reservoir, wet grinding machine, pressure Filter, rotary kiln and hot water storage tank, red mud, desulfurized gypsum, carbide slag, wet mud and industry water enter wet grinding machine and carry out powder Mill enters back into balancing reservoir and is homogenized processing and dealkalize, subsequently enters filter press and carries out mechanism filter-pressing, the solid material after filters pressing High-temperature calcination is carried out into rotary kiln and obtains sulfoaluminate clinker, and hot water provides heat for balancing reservoir in hot water storage tank.
Heretofore described waste-heat recovery device is indirect type heat exchanger.Such as shell-and-tube heat exchanger etc..
Preferably, including lime sterilization pool, the hot water after heating to balancing reservoir flow to lime sterilization pool.
It is further preferred that the pressing filtering liquid of filter press outflow flow to lime sterilization pool.
It is further preferred that the solid residue in lime sterilization pool is delivered to balancing reservoir.
Preferably, including heat exchanger and water pump, water pump will be after the delivery after heating to balancing reservoir to heat exchanger heating Return to hot water storage tank.
It is heated it is further preferred that the clear liquid in lime sterilization pool is delivered to heat exchanger by water pump, is then sent to hot water Storage tank.The impurity blocking pipeline in recirculated water is prevented, prevents from reducing heat transfer effect.
It is further preferred that the high-temperature flue gas of the generation of rotary kiln, which enters heat exchanger, carries out waste heat recycling.
Still more preferably, including deduster, the high-temperature flue gas by waste heat recycling enter deduster and are dusted.
The invention has the benefit that
1, the present invention is able to produce sulphate aluminium cement, can increase substantially large Industrial Solid Waste and municipal sludge again Raw added value of product, significantly reduces the control difficulty of technique；
2, this invention greatly reduces dehydrating municipal sludge expense and energy consumptions；
3, the present invention is based on the physics between waste, chemical bondings to utilize complementation, makes full use of the moisture in wet mud Large solid waste ingredient is mixed, great lot of water resources is saved；
4, high-temperature tail gas UTILIZATION OF VESIDUAL HEAT IN of the present invention, more energy efficient environmental protection；
5, the present invention can fundamentally make large solid waste and reducing urban sludge, stabilisation, nothing simultaneously to a greater degree Evilization and recycling.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
The system for preparing sulphate aluminium cement using municipal waste and Industrial Solid Waste, including balancing reservoir, wet grinding machine, pressure Filter, rotary kiln, cement grinding machine and hot water storage tank, red mud, desulfurized gypsum, carbide slag, wet mud and industry water enter wet process Flour mill carries out grinding, enters back into balancing reservoir and is homogenized processing and dealkalize, subsequently enters filter press and carries out mechanism filter-pressing, filters pressing Solid material afterwards enters rotary kiln and carries out high-temperature calcination acquisition sulfoaluminate clinker, and sulfoaluminate clinker and desulfurized gypsum enter Cement grinding machine carries out combined grinding and obtains sulphate aluminium cement, and hot water provides heat for balancing reservoir in hot water storage tank.
The waste-heat recovery device is shell-and-tube heat exchanger.
Further include lime sterilization pool, flow to lime sterilization pool to the hot water after balancing reservoir heating.
The pressing filtering liquid of filter press outflow flow to lime sterilization pool.
Solid residue in lime sterilization pool is delivered to balancing reservoir.
It further include heat exchanger and water pump, the clear liquid in lime sterilization pool is delivered to heat exchanger and heated, is then return to by water pump Hot water storage tank.The impurity blocking pipeline in recirculated water is prevented, prevents from reducing heat transfer effect.
The high-temperature flue gas that rotary kiln generates enters heat exchanger and carries out waste heat recycling.
Further include deduster, enters deduster by the high-temperature flue gas that waste heat recycles and be dusted.
Its process flow are as follows: as shown in Figure 1,
1. former red mud, desulfurized gypsum are sent into balancing reservoir through gravity system according to the ratio, while being passed through at municipal sewage High-moisture percentage wet mud after reason factory's disinfection and sterilization is mixed with red mud, desulfurized gypsum, is stirred to mixed liquor, is made solid-liquid ratio Control is between 1:3~1:4, wherein wet mud in mixed liquor, red mud, desulfurized gypsum and carbide slag dry weight ratio be 5~10: 15~30:10~20:40~60, and there is spare industry water (by processing applicable waste water up to standard or middle water etc.) to guarantee solid-to-liquid ratio Example reaches requirement；Mixed liquor grinding is made the fineness of material be less than 0.20mm by wet grinding machine.
2. the material after grinding is passed through balancing reservoir, and high-temperature-hot-water is passed through on the outside of balancing reservoir, controls temperature in balancing reservoir Degree maintains 60 DEG C~70 DEG C, is then stirred dealkalize, is corrected by ingredient, obtains the uniform slurries of ingredient.
3. by step 2 homogenizing treated material by mechanical filter press filters pressing at wet stock, while removing can in raw material Solubility impurity.Pressing filtering liquid is sent into lime sterilization pool together with balancing reservoir return water, and foldback returns balancing reservoir again for treated solid residue It is used as ingredient；Treated clear liquid is pumped into waste heat utilization equipment by return water and generates hot water.
4. making the main ingredient SiO of raw material by mixing, wet grinding, homogenizing, mechanism filter-pressing2Account for 10~25% (wt%), CaO accounts for 30~50% (wt%), Al2O3Account for 15~30% (wt%), Fe2O3Account for 5~15% (wt%), SO3Account for 15~ 35% (wt%), basicity factor CmMeet between 0.95~0.98,
CaO, SiO in formula2、Al2O3、Fe2O3、TiO2、SO3Respectively weight percent shared by corresponding chemical ingredient；
5. dewatered raw material are sent into rotary kiln through desiccation (or direct), high-temperature calcination, calcination temperature 1250 are carried out DEG C~1350 DEG C, 0.5~1h of calcination time.
6. coal dust is sprayed into and carries out oxidizing atmosphere burning in rotary kiln burner.
7. the flue gas heat generated using flue gas waste heat recovery equipment recycling rotary kiln, to generate hot water, to homogenizing Pond heating.
8. by the kiln exit gas of waste heat recovery utilizing equipment after cleaner qualified discharge.
9. in the sulfoaluminate clinker that rotary kiln generates, with calcium sulphoaluminate (3CaO3Al2O3·CaSO4) and dicalcium silicate (2CaO·SiO2) and iron phase be main mineral.Finally, clinker is mixed with desulfurized gypsum, wherein shared by desulfurized gypsum Quality (clinker and desulfurized gypsum gross mass) score 8%, is sent into cement grinding mill inner powder and wears into cement.
Embodiment 1:
It is prepared using above system and technique, design parameter, calculated result and detection are as follows: after mixing matching The quality meter of solidliquid mixture matter, wet mud, red mud, desulfurized gypsum and carbide slag dry weight ratio be 10:30:20:40.It will be mechanical Dehydration raw material are directly transported into calcined by rotary kiln, and calcination temperature is 1310 DEG C, and calcination time is 60 minutes, and dioxin etc. has at this time Malicious harmful substance can be eliminated well.Then flue gas is recycled heat through waste heat recovery apparatus.Finally to flue gas It is dusted, fume treatment, treated, and flue gas detected does not find the harmful substances such as dioxin.Through cement standard cement mortar strength Test, 3 days and 28 days compression strength are respectively 47.8Mpa and 60.5Mpa.
Embodiment 2:
It is prepared using above system and technique, design parameter, calculated result and detection are as follows: after mixing matching The quality meter of solidliquid mixture matter, wet mud, red mud, desulfurized gypsum and carbide slag dry weight ratio be 5:15:10:60.It will be mechanical Dehydration raw material are directly transported into calcined by rotary kiln, and firing temperature is 1280 DEG C, and calcination time is 60 minutes.Treated, and flue gas passes through Detection does not find the harmful substances such as dioxin.It is tested through cement standard cement mortar strength, 3 days and 28 days compression strength are respectively 47.4Mpa and 56.2Mpa.
Embodiment 3:
It is prepared using above system and technique, design parameter, calculated result and detection are as follows: after mixing matching The quality meter of solidliquid mixture matter, wet mud, red mud, desulfurized gypsum and carbide slag dry weight ratio be 8:23:15:54.It will be mechanical Dehydration raw material are directly transported into calcined by rotary kiln, and firing temperature is 1300 DEG C, and calcination time is 45 minutes.Treated, and flue gas passes through Detection does not find the harmful substances such as dioxin.It is tested through cement standard cement mortar strength, 3 days and 28 days compression strength are respectively 47.6Mpa and 58.4Mpa.
Embodiment 4:
It is prepared using above system and technique, design parameter, calculated result and detection are as follows: after mixing matching The quality meter of solidliquid mixture matter, wet mud, red mud, desulfurized gypsum and carbide slag dry weight ratio be 9.5:20.5:17.5: 52.5.Mechanical dehydration raw material are directly transported into calcined by rotary kiln, firing temperature is 1300 DEG C, and calcination time is 45 minutes.Place Flue gas after reason, which is detected, does not find the harmful substances such as dioxin.It is tested through cement standard cement mortar strength, 3 days and 28 days pressure resistances Degree is respectively 47.9Mpa and 60.4Mpa.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not to invention protection scope Limitation, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not required to It is still within the scope of the present invention to make the creative labor the various modifications or changes that can be made.

Claims (10)

1. the method for preparing sulphate aluminium cement using municipal waste and Industrial Solid Waste, characterized in that is produced from municipal sewage plant Raw wet mud is fed directly to balancing reservoir without dehydration and is mixed to form with red mud, desulfurized gypsum, carbide slag and industry water Mixed liquor, wet mud in mixed liquor, red mud, desulfurized gypsum and carbide slag dry weight ratio be 5~10:15~30:10~20:40~ 60, keeping the solid-to-liquid ratio in mixed liquor is 1:3~1:4, is homogenized processing again simultaneously after carrying out wet grinding to the mixed liquor Dealkalize, homogenizing treatment temperature are 60~70 DEG C, and homogenizing treated material carries out wet grinding, are dehydrated using mechanism filter-pressing, Then the material after filters pressing is subjected to high-temperature calcination and obtains sulfoaluminate clinker.
2. the method as described in claim 1, characterized in that the pressing filtering liquid after filters pressing carries out lime sterilization.
3. method according to claim 2, characterized in that the solid residue after lime sterilization is delivered to balancing reservoir；
Or, heat source of the clear liquid after lime sterilization after heating as balancing reservoir.
4. the method as described in claim 1, characterized in that the ingredient after filters pressing, SiO210~25% (wt%) are accounted for, CaO accounts for 30 ~50% (wt%), Al2O3Account for 15~30% (wt%), Fe2O3Account for 5~15% (wt%), SO3Account for 15~35% (wt%).
5. method as claimed in claim 4, characterized in that basicity factor CmIt is 0.95~0.98.
6. the method as described in claim 1, characterized in that the energy generated using coal dust firing is as the high-temperature calcination Heat source.
7. method as claimed in claim 6, characterized in that the high-temperature flue gas that the burning generates carries out waste heat recycling.
8. method according to claim 6 or 7, characterized in that discharged after dedusting by waste heat flue gas after the recovery；
Or, the heat source by waste heat hot water after the recovery as homogenizing processing.
9. the system for preparing sulphate aluminium cement using municipal waste and Industrial Solid Waste, characterized in that including balancing reservoir, wet process powder Grinding machine, filter press, rotary kiln and hot water storage tank, red mud, desulfurized gypsum, carbide slag, wet mud and industry water enter wet grinding Machine carries out grinding, enters back into balancing reservoir and is homogenized processing and dealkalize, subsequently enters filter press and carries out mechanism filter-pressing, after filters pressing Solid material enters rotary kiln and carries out high-temperature calcination acquisition sulfoaluminate clinker, and hot water provides heat for balancing reservoir in hot water storage tank Amount；
Including lime sterilization pool, lime sterilization pool is flow to the hot water after balancing reservoir heating；The pressing filtering liquid of filter press outflow is flow to Lime sterilization pool；Solid residue in lime sterilization pool is delivered to balancing reservoir；
Including heat exchanger and water pump, water pump returns to hot water and stores up after heating the delivery after heating to balancing reservoir to heat exchanger Tank；Water pump returns to hot water storage tank after the clear liquid in lime sterilization pool is delivered to heat exchanger heating；Water pump will be heated to balancing reservoir Delivery afterwards to heat exchanger heats, and is then sent to hot water storage tank；
The high-temperature flue gas of the generation of rotary kiln enters heat exchanger and carries out waste heat recycling.
10. system as claimed in claim 9, characterized in that including deduster, the high-temperature flue gas by waste heat recycling, which enters, to be removed Dirt device is dusted.
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CN108483958B (en) * 2018-06-07 2020-04-17 山东大学 Resource utilization method of waste incineration fly ash and industrial solid waste
CN109530392B (en) * 2018-11-15 2020-05-26 中南大学 Method for reducing alkalinity of red mud by using industrial wastes
CN111233356B (en) * 2020-03-10 2021-04-06 山东大学 Method and system for preparing sulphoaluminate cement from all solid waste of aluminum ash pretreatment
CN112723764A (en) * 2020-12-29 2021-04-30 山东大学 Red mud-based cementing material, red mud-based lightweight aggregate concrete and preparation method thereof
CN114804677A (en) * 2022-04-07 2022-07-29 国能生物发电集团有限公司 System and method for producing high-silicon type sulphoaluminate cement by using biomass ash

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