WO2013078839A1 - 窑头外投料煅烧高活性混合材的方法和设备 - Google Patents
窑头外投料煅烧高活性混合材的方法和设备 Download PDFInfo
- Publication number
- WO2013078839A1 WO2013078839A1 PCT/CN2012/075900 CN2012075900W WO2013078839A1 WO 2013078839 A1 WO2013078839 A1 WO 2013078839A1 CN 2012075900 W CN2012075900 W CN 2012075900W WO 2013078839 A1 WO2013078839 A1 WO 2013078839A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cement
- kiln
- coal
- clinker
- kiln head
- Prior art date
Links
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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
-
- 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
-
- 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/30—Cements from oil shales, residues or waste other than slag from oil shale; from oil shale residues ; from lignite processing, e.g. using certain lignite fractions
-
- 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
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
- C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/33—Arrangement of devices for discharging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/38—Arrangements of cooling devices
- F27B7/383—Cooling devices for the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
- F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
-
- 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
Definitions
- the invention relates to a method of producing cement.
- the present invention relates to a major improvement in the method for producing cement clinker in a cement rotary kiln, that is, a production method for calcining a high-active mixed material by "secondary feeding calcination" outside the kiln head, thereby increasing cement production.
- the method of the present invention also relates to a production method in which the cylinder is easy to carry out, energy-saving and efficient, and low-cost use of industrial and mining waste as a material for calcination to increase cement production.
- the method of the present invention also relates to a method for improving energy utilization efficiency in cement clinker production, reducing coal consumption of cement clinker production, and increasing power generation of waste heat power generation. Furthermore, the invention relates to an apparatus for carrying out the method of the invention. Background technique
- Cement is a powdery hydraulic inorganic cementitious material. It can form a slurry after stirring with water. It can firmly bond sand, stone, steel and other materials together and harden in air or water. It is the most used in the construction industry. Wide, the largest amount of material. Although cement is cheaper, its consumption is huge and it has a significant share of construction costs.
- China's cement industry has developed rapidly, and its production and consumption account for about 45% of the world total.
- China's cement production reached 1.88 billion tons, and it has considerable room for development.
- the cement industry in China generally adopts the dry/wet rotary kiln production process and the preheating decomposition technology outside the kiln.
- the process can be generally summarized as "two mills and one burn", namely: raw material preparation, clinker calcination, and cement grinding.
- raw material preparation refers to the physical treatment of limestone, clay and other auxiliary raw materials, such as crushing and grinding, to form a raw material suitable for the firing system;
- clinker calcination is pre-externed from the kiln
- the composition of thermal decomposition, calcination in the kiln, etc., the preheated and decomposed raw materials are sent to the rotary kiln for high temperature calcination, the firing temperature is about 1250 ° C to 1450 ° C, in order to achieve the firing of the clinker, burning
- the high-temperature clinker is discharged from the kiln head, cooled by a clinker cooler such as a grate cooler, and transported to a storage area or clinker mill.
- cement grinding is the final process of cement manufacturing, which will cement clinker.
- the mixture and the necessary performance adjusting material/gelling agent are ground to a suitable particle size to form a finished cement product.
- most cement production lines are equipped with hot air utilization and waste heat power generation units.
- the clinker after firing at about 1250 ° C to 1450 ° C maintains a relatively high temperature
- the general kiln head discharge temperature is about 900 ° C to 1200 ° C.
- the clinker is usually cooled by a grate cooler or other cooling device. For example, by blowing cold air from the bottom up in a grate cooler.
- the cooling air of the first and second sections of the grate cooler is heated by the clinker, and the average temperature is about 900 ° C, and a part of the cooling air is sent to the rotary kiln calcination zone. The other part is taken out into the kiln decomposition device for the calcination of cement clinker and the decomposition of cement raw materials.
- the average temperature of the third stage cooling air of the grate cooler is about 400 ° C, which can be used for waste heat power generation and/or as a heat source for coal grinding. Even so, the calories of the calcined clinker itself are not fully utilized.
- CN101407382A discloses a method and a device for controlling the air extraction process of a kiln head waste heat boiler in dry process cement waste heat, the invention relates to controlling and adjusting clinker temperature, clinker flow rate, clinker particle size and material layer thickness. , chiller speed and air volume / wind speed, etc., in the grate cooler 600 ° C to 200 ° C area to take the wind.
- the method uses industrial waste such as fly ash, coal gangue, steel slag, and inferior coal, and is calcined at 950 ° C to 1100 ° C to form cement clinker by using a boiling furnace or a fluidized bed.
- the method requires grinding the raw material to a 0.08 sieve residue of not more than 10%, and using a boiling furnace or a fluidized bed.
- a low temperature cement production process is disclosed in CN1057821A.
- the method uses coal gangue and quicklime as main raw materials, and is produced by steaming at 750 ° C to 850 ° C under normal pressure steaming to produce cement clinker.
- the main problem with this method is that the raw material composition needs to be aged for a long time, 100 ° C, 4 to 10 hours, and seeding is required.
- the method is limited by conditions such as long steaming time and limited fluidized bed capacity, and it is difficult to achieve large-scale application.
- a similar method for producing composite cement from coal gangue is also disclosed in CN1546410A. The method requires calcination of the ground raw material composition in a high temperature calciner at a calcination temperature of from 600 ° C to 1000 ° C, a calcination time of from 1.5 to 2.5 hours, and the use of an alkali metal or alkaline earth metal activator.
- CN1124724A also discloses a method for producing cement admixture using coal gangue or the like by calcining at 1000 ° C to 1500 ° C using a vertical calcining kiln. The process requires high temperature calcination for 6 to 10 hours and the sinter is cooled with water.
- Another object of the present invention is to provide a method for improving cement production by using industrial and mining waste residue, which is easy to carry out, energy-saving and efficient, and low-cost.
- Another object of the present invention is to provide a method for improving energy utilization efficiency in cement clinker production, reducing coal consumption of cement clinker production, and increasing power generation capacity of waste heat power generation.
- Another object of the present invention is to provide an apparatus for carrying out the above-described method of producing a calcined high-active mixed material, and a modification of the related equipment on the production line.
- Another object of the present invention is to provide a cement clinker and cement produced by carrying out the above production method.
- second charge calcination means that the present invention is placed on the outside of the rotary kiln head portion with respect to the conventional raw meal charge and clinker calcination carried out in the rotary kiln (the most a material or material composition which can be calcined at a lower temperature to form a cement active ingredient, and calcined by the temperature of the high temperature clinker discharged from the kiln head, the secondary feeding and calcination do not occur in the slewing In the kiln, it occurs in the kiln head cover outside the rotary kiln head and in the grate cooler.
- the feed calcination involved in the process of the present invention is defined as “secondary charge calcination” with respect to the feed calcination carried out in the rotary kiln
- the input material is defined as “secondary input calcined material” or " Secondary input of material”.
- outside the kiln head refers to a rotary kiln body other than the rotary kiln head end, and a kiln head cover and a grate cooler are usually disposed at this position.
- the high temperature clinker discharged from the kiln head is called "unloading material”.
- the improvement of cement production according to the present invention actually means that the obtained cement clinker includes "unloading material” from high-temperature calcination of rotary kiln and high-activity mixing formed by "kiln head outside” and “secondary charging calcination”. material.
- the "high-temperature calcination" as used in the present invention refers to a firing temperature of a normal rotary kiln calcination, which is about 1250 ° C to 1450 ° C; the secondary calcination temperature or a lower calcination temperature or a low-temperature calcination temperature, Not higher than 1100 °C, generally about 800 ° C to 1100 ° C.
- the "mixed material” as used in the present invention refers to a material which has been subjected to secondary calcination.
- cement clinker mixture as used in the present invention means a mixture of the material after secondary calcination and the material discharged from the kiln head.
- the invention provides a method of charging a calcined active mix outside a kiln head, the method comprising the steps of:
- the material which can be calcined at a lower temperature to form a cement active component is introduced through the kiln head twice to perform low-temperature calcination.
- the secondary input material has a calorific value, and the calcined heat can be used to increase the secondary and tertiary air temperatures and to generate electricity, thereby having the effect of saving coal and increasing waste heat power generation. Therefore, the method of the present invention is also a method of saving coal and increasing the amount of waste heat generated.
- the "outside the kiln head” may be the location of the kiln head cover and/or the grate cooler near the kiln head cover.
- the material is a material which is calcined at 700 ° C to 1200 ° C to form a cement active ingredient, and the material has a calorific value of from OK J / kg to 12000 KJ / kg, preferably 100 KJ / kg to 12000KJ/kg;
- the material has a maximum particle diameter of less than 5 cm, preferably less than 2 cm.
- the material comprises a first raw material selected from the group consisting of coal gangue, oil shale, stone coal, clay, river lake sludge, shale, waste residue, sewage sludge and peat.
- a first raw material selected from the group consisting of coal gangue, oil shale, stone coal, clay, river lake sludge, shale, waste residue, sewage sludge and peat.
- the material may further comprise a second raw material having a higher calorific value for supplementing the insufficient calorific value of the first raw material, thereby increasing the calorific value of the material;
- the material may further comprise a third raw material having a higher calcium value for supplementing the deficiency of the calcium content of the first raw material, thereby increasing the calcium content of the material.
- the second raw material is selected from one or more of inferior coal, waste coke, peat and waste graphite; and the third raw material is calcium carbide slag.
- the material is injected twice from the outside of the kiln head, and the input amount of the material is 1% to 100%, preferably 5% to 70% by weight of the clinker calcined at a high temperature in the rotary kiln.
- the input material is a material which can be calcined at a lower temperature to form an active ingredient of the cement.
- the lower calcination temperature is from 700 ° C to 1200 ° C, preferably from 750 ° C to 1100 ° C.
- the invention also provides a cement clinker mixture produced according to the above process.
- the present invention provides a cement production facility for a rotary kiln that increases cement production and thermal energy utilization, and the production equipment includes a rotary kiln (12), a kiln head cover (11), and a grate cooler (9).
- a feed port (16) is provided on the cover of the kiln head outside the kiln head (18) of the rotary kiln and/or at the grate cooler for feeding material into the kiln head cover and the grate cooler.
- the feed port (16) may be one or more, and may be disposed at the side and/or the top of the cover of the kiln cover (11) and at the grate cooler.
- the production apparatus may further comprise a material conveying device that delivers the material to be fed to the feed port (16).
- the firing temperature of the obtained clinker is about 1250 ° C to 1450 ° C as described above.
- the high temperature calcined clinker is discharged through the kiln head and enters the kiln head cover and the grate cooler.
- the temperature of the unloading material is about 900 ° C to 1200 ° C.
- the clinker is cooled by a grate cooler, and after cooling to about 200 ° C, the clinker is put into storage or sent to a cement mill.
- the cement production method of the present invention utilizes the temperature of the high-temperature clinker discharged from the kiln head, and can be calcined at a lower temperature by secondary input (having a certain calorific value) outside the kiln head.
- the material forming the cement active ingredient is calcined in the kiln head cover and the grate cooler, and cooled together with the clinker discharged from the kiln head to form the cement clinker mixture of the present invention. Since the calcined coal gangue and the like are rapidly calcined and rapidly cooled, the activity is much higher than that of the general cement mixture, so that when the same quality cement is ground, the clinker usage is decreased, thereby increasing the cement production.
- the secondary calcination temperature is generally not more than 1200 ° C, not less than 700 ° C.
- a preferred calcination temperature range is from about 750 ° C to 1100 ° C.
- the specific calcination temperature is selected and varies with the materials that are input twice.
- the secondary input of the material may be carried out through one or more feed ports provided at the side and/or the upper portion of the kiln head cover, or may be carried out by one or more feed ports provided at the position of the grate cooler near the kiln head, of course If necessary, it is also possible to set the feed port through the above two positions for feeding. A person skilled in the art can set the feed port according to actual production conditions as long as the production method of the present invention can be realized.
- the high-temperature clinker discharged from the rotary kiln rolls off together, and is evenly spread on the surface layer of the high-temperature clinker discharged from the kiln head, and is cooled with the crucible. The machine moves forward.
- the secondary input preferably has a certain calorific value and can be calcined at a lower temperature to form a cement active ingredient, mainly selected from industrial waste, slag and mining waste materials, such as coal gangue, stone coal, or Choose from clay, river and lake silt, shale and waste soil.
- a cement active ingredient mainly selected from industrial waste, slag and mining waste materials, such as coal gangue, stone coal, or Choose from clay, river and lake silt, shale and waste soil.
- carbonaceous materials such as inferior coal, stone coal, waste graphite, and peat may be added as needed to supplement the calorific value of the material.
- an appropriate amount of calcium raw materials such as cooked stone ash, calcium carbide slag, etc., may be added as needed to supplement the material with insufficient calcium.
- the present invention preferably uses coal gangue as the main raw material for secondary charging.
- Coal gangue is a rock with a low carbon content and a harder coal than that contained in the coal seam. It is a general term for solid waste discharged during coal mining and coal washing. Since the chemical composition of coal gangue contains silicon, calcium and carbon, and even the composition of coal gangue of some mines is close to the cement raw material, it can be directly crushed and used as the secondary input material of the present invention.
- proper addition of calcium raw materials and/or carbonaceous raw materials can expand the selection of coal gangue and increase the amount of coal gangue added, thereby increasing cement production.
- the present invention can also use clay, river lake sludge, shale, waste dregs, etc. as the main raw materials for secondary charging. Taking the use of river and lake silt as an example, good results can also be achieved. Since such raw materials usually have a carbon content of 0 or very low, that is, they do not contain a calorific value, if necessary, materials having a higher heating value, such as inferior coal and the like, and coal gangue having a higher calorific value, may be added during the batching.
- the secondary input calcined material according to the present invention generally does not need to undergo energy-consuming process steps such as grinding, steaming, pre-decomposition, etc., and only needs to be crushed to a certain particle size.
- the material is broken up to particles having a maximum particle diameter of less than about 5 cm, preferably less than about 2 cm, using a conventional crusher, preferably particles having a maximum particle diameter of less than about 2 cm.
- the secondary input calcined material of the present invention is present in an amount of from about 1% to 100% by weight relative to the weight of the clinker discharged from the rotary kiln.
- the preferred secondary input calcined material of the present invention is present in an amount of from about 5% to about 70% by weight based on the weight of the clinker discharged from the rotary kiln. It should be understood that in accordance with the teachings of the present invention, an input of more than 70%, or even 100% or more, is possible depending on the quality of the material to be charged. As long as the quality of the cement is not significantly reduced, or the amount of total mixed material added is significantly reduced, it is feasible and within the scope of the claimed invention.
- the secondary input calcined material of the present invention preferably contains a certain calorific value, and the calorific value thereof is expressed by the calorific value, and is generally in the range of about 100 KJ/kg to 12,000 KJ/kg. If the calorific value is too low, the secondary air temperature will be affected after the material is injected, and the coal consumption of the rotary kiln will be increased and the waste heat power generation will be reduced. If the calorific value is too high, it will cause partial over-burning. If the temperature is too high, it will adversely affect the quality of the clinker discharged from the rotary kiln that needs cooling in the grate cooler.
- the secondary input calcined material used in the present invention may be directly applied without adding any other carbonaceous material.
- the addition of an appropriate amount of carbonaceous material can expand the adaptability and range of choice of the main raw materials.
- one of ordinary skill in the art can practice the invention by controlling the calorific value of the secondary input calcined material to an appropriate range.
- the secondary feed calcination according to the present invention is completed with the progress of the grate cooler, generally does not need to adjust the running speed particularly complicated, but the air volume and the wind speed of each section in the grate cooler can be appropriately adjusted, so that the secondary input of the calcined material is Fully calcined.
- the secondary input calcined material is relatively evenly laid on the surface layer of the high temperature clinker discharged from the kiln head, while the cold air of the grate cooler is blown from the bottom to the top, and the cold air passes through the unloading layer.
- the high temperature clinker is cooled while providing oxygen combustion or high temperature heating calcination for the secondary calcination performed on its surface layer.
- coal gangue is used as a secondary feed calcined material
- the current cement rotary kiln production line equipment is taken as an example
- the invention can be implemented by the following process steps:
- the cement raw material is pretreated and then passed through a decomposition furnace.
- the rotary kiln is calcined at a high temperature in the rotary kiln to become a calcined clinker, and then discharged from the kiln head into a grate cooler for quenching treatment.
- the kiln head cover of the rotary kiln is provided with a feeding port through which the pretreated coal gangue is conveyed into the grate cooler, and the secondary input calcined material is rolled off with the unloading material, and is relatively flattened in the kiln.
- a layer of coal gangue material is formed and conveyed forward with the conveyor belt of the grate cooler.
- the coal gangue is calcined and burned at a high temperature due to the high temperature of the discharged high-temperature calcined clinker itself, and the coal gangue is usually burned at about 700 ° C to 1000 ° C, that is, "secondary charge calcination".
- the calcined coal gangue becomes the active ingredient of the cement.
- the secondary calcination can also significantly increase the secondary air temperature entering the rotary kiln, the decomposition furnace, and the tertiary air temperature for the waste heat power generation, thereby greatly saving the coal consumption of the kiln head and the coal consumption of the decomposition furnace, which are generated when calcined.
- the heat can further increase the amount of power generated by the waste heat power generation.
- the production method of the invention mainly comprises providing an opening in the kiln cover of the rotary kiln, through which the coal gangue which can be used as a cement active component is added from the upper part of the grate cooler, that is, the kiln head. , shale, stone coal or peat, etc., these materials are combined with the calcined high-temperature clinker, because the heat of the high-temperature clinker itself is rapidly calcined in the grate cooler, in the upper part of the high-temperature clinker, and then rapidly cooled. Produces a highly active cement admixture, which increases the cement content and increases cement production.
- the present invention has at least the following beneficial effects:
- the material for secondary calcination added by the present invention may be a material having low utilization value of coal gangue, inferior coal, shale, stone coal or peat, waste soil, etc., thereby significantly reducing cement production cost. , greatly increasing the output value of the cement industry;
- FIG. 1 is a schematic view of a rotary kiln cement production apparatus of the present invention, wherein 12 is a rotary kiln, 11 is a kiln head cover, 9 is a grate cooler, 16 is a feed port, and 18 is a kiln head; wherein an arrow indicates a secondary input material enters The direction of the kiln cover.
- Fig. 2 is a graph showing the effect of different amounts of coal gangue as a material on the strength of the cement of the present invention.
- Figure 3 is a graph showing the variation of the amount of coal gangue used as the material and the secondary and tertiary air temperatures and the heat of the residual heat.
- Figure 4 is a graph showing the effect of different amounts of gangue mixture on the strength of the cement of the present invention. The best way to implement the invention
- Example 1 Material with coal as secondary material
- 12 is a rotary kiln
- 11 is a kiln head cover
- 9 is a grate cooler
- 16 is a feed port
- 17 is a material conveying device
- 18 is a kiln head
- 19 is Silo.
- coal gangue with an average heat of 1600 KJ/kg is input from the feed port (16), and the input amount is the clinker output by the high temperature calcination of the rotary kiln. 25%, and the coal gangue has been previously broken into pellets having a diameter of less than 2 cm.
- the coal gangue that is put in is rolled down to the grate cooler along with the high-temperature clinker discharged from the rotary kiln, and is evenly laid on the surface of the high-temperature clinker discharged from the kiln head, and moves forward with the grate cooler. .
- the method for measuring the compressive strength and the flexural strength in this embodiment and the following examples adopts the national standard GB 175-2007.
- the clinker used can be reduced from the original 580kg/ton to 500kg/ton, and the average clinker used is less than 80kg per ton of cement. Its own t ⁇ : 3 ⁇ 4 mouth 4:
- the secondary feedstock added to the coal gangue calcination also achieves the following technical effects:
- the secondary air temperature is increased by 60 °C on average, so that all the bituminous coal calcination is changed to 60% anthracite and 40% bituminous coal.
- the third air temperature (for waste heat power generation) is increased by 100 °C, so that the electricity generated per ton of clinker is from 37. Increase to 43. .
- the daily coal consumption is 5 tons.
- the procurement cost of coal gangue is lower than the cost of mixed materials (coal ash, etc.), saving 40 yuan per ton, saving 11,000 yuan per day.
- Example 2 Using the same method and equipment as in Example 1, when the clinker calcined at a high temperature in the rotary kiln enters the grate cooler through the kiln head cover, the shale is introduced from the feed port (16) as a secondary calcined material, and calcined and measured. The properties of the resulting mixed materials. See Table 7 for the feeding situation. When measuring the strength, 3% of gypsum was also added to the mixed material. The measurement results of each numbering in Table 7 are shown in Table 8.
- Example 6 Materials with secondary coal and other materials as secondary feed
- Example 7 Effect of secondary input materials on mixed clinker and energy utilization efficiency
- the secondary input material is combined with the calcined high-temperature clinker, because the heat carried by the high-temperature clinker itself is rapidly calcined in the grate cooler and in the upper part of the high-temperature clinker, and becomes a highly active mixture.
- the material which increases the cement composition, increases the cement production while hardly affecting the strength of the mixed clinker ( Figure 2).
- the temperature of the wind entering the rotary kiln, the decomposition furnace, and the temperature of the wind for waste heat power generation are significantly improved.
- the kiln head coal and the decomposition furnace coal are greatly saved, and the amount of waste heat power generation is increased.
- Example 8 Using the sludge of a sewage treatment plant as a secondary feed material
- the sludge from the sewage treatment plant is fed from the feed port (16) as a secondary calcined material.
- the properties of the resulting mixed material were measured after calcination, wherein the sludge was dehydrated to a water content of 15% before charging.
- the feeding conditions and strength measurement results are shown in Table 17 and Table 18, respectively.
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12854281.8A EP2786973B1 (en) | 2011-11-28 | 2012-05-22 | Method for calcining blending material with high activity by feeding outside kiln head |
ES12854281T ES2733310T3 (es) | 2011-11-28 | 2012-05-22 | Método para calcinar material de mezcla con alta actividad por alimentación fuera de una cabeza de horno |
PL12854281T PL2786973T3 (pl) | 2011-11-28 | 2012-05-22 | Proces kalcynowania mieszanego materiału o wysokiej aktywności poprzez dostarczanie poza głowicą pieca |
MX2014006351A MX349958B (es) | 2011-11-28 | 2012-05-22 | Proceso para la calcinación del material de mezcla con alta actividad mediante la alimentacion externa de la cabeza del horno y sus aparatos del mismo. |
BR112014012811A BR112014012811A8 (pt) | 2011-11-28 | 2012-05-22 | processo para calcinar um material de mistura com alta atividade por alimentação fora do cabeçote de forno e seu aparelho |
US14/360,874 US9403718B2 (en) | 2011-11-28 | 2012-05-22 | Process for calcining blending material with high activity by feeding outside kiln head and apparatus thereof |
RU2014125517/03A RU2587653C1 (ru) | 2011-11-28 | 2012-05-22 | Способ обжига высокоактивного смешанного материала с подачей вне головки обжигательной печи и устройство для осуществления указанного способа |
ZA2014/04668A ZA201404668B (en) | 2011-11-28 | 2014-06-25 | Process for calcining blending material with high activity by feeding outside kiln head and apparatus thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110385259.9 | 2011-11-28 | ||
CN2011103852599A CN102464458B (zh) | 2011-11-28 | 2011-11-28 | 窑头外投料煅烧高活性混合材的方法和设备 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013078839A1 true WO2013078839A1 (zh) | 2013-06-06 |
Family
ID=46068625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2012/075900 WO2013078839A1 (zh) | 2011-11-28 | 2012-05-22 | 窑头外投料煅烧高活性混合材的方法和设备 |
Country Status (10)
Country | Link |
---|---|
US (1) | US9403718B2 (zh) |
EP (1) | EP2786973B1 (zh) |
CN (1) | CN102464458B (zh) |
BR (1) | BR112014012811A8 (zh) |
ES (1) | ES2733310T3 (zh) |
MX (1) | MX349958B (zh) |
PL (1) | PL2786973T3 (zh) |
RU (1) | RU2587653C1 (zh) |
WO (1) | WO2013078839A1 (zh) |
ZA (1) | ZA201404668B (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113233797A (zh) * | 2020-09-21 | 2021-08-10 | 合肥工业大学 | 一种煤矸石基胶凝材料及其制备方法 |
CN115321851A (zh) * | 2022-09-22 | 2022-11-11 | 北科蕴宏环保科技(北京)有限公司 | 一种绿色低碳高性能胶凝材料及制备方法 |
CN116499261A (zh) * | 2023-04-14 | 2023-07-28 | 合肥合意环保科技工程有限公司 | 一种电石生产冷却用的能量综合利用装置 |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102980410B (zh) * | 2012-11-20 | 2014-12-10 | 高玉宗 | 一种篦冷机式垃圾处理装置和一种垃圾处理方法 |
CN103274614B (zh) * | 2013-06-27 | 2014-06-04 | 尹小林 | 一种干法旋窑生产微膨胀早强硅酸盐水泥的方法 |
CN103396020B (zh) * | 2013-08-13 | 2014-08-06 | 尹无忌 | 一种废弃混凝土作为水泥生产中的活性掺合材的方法 |
PT108290B (pt) * | 2015-03-17 | 2018-12-10 | Secil Companhia Geral De Cal E Cimento S A | Método de produção de um clinquer de baixo teor de carbono |
CN106866007A (zh) * | 2017-03-20 | 2017-06-20 | 重庆市新嘉南建材有限责任公司 | 一种将煤矸石烧制为水泥原料的方法及系统 |
CN107216055B (zh) * | 2017-06-02 | 2019-10-29 | 天津金隅振兴环保科技有限公司 | 硅砂部分替代砂岩的水泥熟料及其制备工艺 |
CN109917762B (zh) * | 2019-03-13 | 2021-09-14 | 安徽海螺集团有限责任公司 | 一种水泥窑系统二次风温自动补偿的方法 |
CN110606678A (zh) * | 2019-09-24 | 2019-12-24 | 贵州福泉西南水泥有限公司 | 一种硅酸盐水泥 |
CN110606677A (zh) * | 2019-10-22 | 2019-12-24 | 天津金隅振兴环保科技有限公司 | 一种生态烧结料及其制备方法与应用 |
CN111320405B (zh) * | 2020-04-15 | 2022-03-18 | 浙江合力海科新材料股份有限公司 | 一种固态危废基矿物掺合料及其制备方法 |
CN111608740A (zh) * | 2020-05-19 | 2020-09-01 | 北京坚构创新科技有限公司 | 一种利用余热锅炉蒸汽的熟料生产线驱动系统及方法 |
CN111925140B (zh) * | 2020-07-30 | 2022-01-14 | 项金生 | 一种铝酸钙水泥熟料及矾土水泥熟料的生产方法与应用 |
CN112604202A (zh) * | 2020-12-23 | 2021-04-06 | 中煤地质集团有限公司 | 一种自燃矸石山综合治理方法 |
CN112645667B (zh) * | 2020-12-25 | 2022-11-08 | 天津水泥工业设计研究院有限公司 | 利用煤矸石电厂固废制备的防火水泥基发泡保温板及方法 |
CN112745049A (zh) * | 2021-01-07 | 2021-05-04 | 中建西部建设建材科学研究院有限公司 | 一种煤矸石基掺合料及其制备方法 |
CN112646565A (zh) * | 2021-01-25 | 2021-04-13 | 河南郑矿机器有限公司 | 一种煤矸石低密度石油陶粒支撑剂的制备工艺 |
CN112723765A (zh) * | 2021-01-25 | 2021-04-30 | 辽宁交通水泥有限责任公司 | 一种绿色环保中碱硅酸盐水泥熟料及其生产工艺 |
CN113020201B (zh) * | 2021-01-31 | 2022-05-20 | 山海投资(海南)集团有限公司 | 一种焚烧飞灰资源化处理装置 |
CN113045227B (zh) * | 2021-04-15 | 2022-04-05 | 韶关市柏林再生资源开发有限公司 | 一种煤矸石活化煅烧方法 |
CN113121082A (zh) * | 2021-05-21 | 2021-07-16 | 四川海沛环保科技有限公司 | 一种含油污泥资源化利用及无害化处理的装置及方法 |
CN113816629B (zh) * | 2021-07-26 | 2022-08-05 | 冀东海德堡(扶风)水泥有限公司 | 一种水泥熟化用石灰石制粉工艺 |
CN114620958B (zh) * | 2022-04-01 | 2024-03-12 | 西安建筑科技大学 | 一种利用水泥窑热风协同活化煤矸石的工艺与系统 |
CN117069399B (zh) * | 2023-10-16 | 2024-01-30 | 甘肃土木工程科学研究院有限公司 | 一种基于煤矸石固废的胶凝材料及其制备方法 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1057821A (zh) | 1990-07-01 | 1992-01-15 | 中国矿业大学 | 煤矸石低温水泥生产方法及流化床煅烧装置 |
CN1072159A (zh) | 1992-11-15 | 1993-05-19 | 四川建筑材料工业学院 | 一种低温煅烧水泥熟料工艺 |
CN1124724A (zh) | 1995-05-05 | 1996-06-19 | 宋文奎 | 煤矸石煅烧制造水泥掺合料的方法及其煅烧窑炉 |
CN1236748A (zh) * | 1999-04-23 | 1999-12-01 | 潘光华 | 煅烧煤矸石制取活性水泥混合材的方法 |
CN1370750A (zh) * | 2001-02-27 | 2002-09-25 | 天津水泥工业设计研究院 | 处理工业和生活污泥的方法 |
CN1436745A (zh) * | 2002-02-06 | 2003-08-20 | 刘雁鸿 | 用工业废渣生产水泥混合材的方法 |
CN1546410A (zh) | 2003-12-01 | 2004-11-17 | 同济大学 | 大掺量煤矸石复合水泥及其制备方法 |
CN101407382A (zh) | 2008-11-12 | 2009-04-15 | 昆明阳光基业股份有限公司 | 干法水泥余热利用中窑头余热锅炉取风工艺的控制方法及其装置 |
CN102070308A (zh) * | 2010-12-01 | 2011-05-25 | 中信重工机械股份有限公司 | 利用水泥回转窑处理生活垃圾的设备工艺配置方法 |
CN102211886A (zh) * | 2011-03-10 | 2011-10-12 | 北川四星水泥有限公司 | 一种火山灰性混合材及其制备方法和应用 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2035425C1 (ru) * | 1992-10-13 | 1995-05-20 | Акционерное общество "Жигулевские стройматериалы" | Способ обжига цементного клинкера |
US5494515C1 (en) * | 1995-03-15 | 2002-01-22 | Texas Industries Inc | Method and apparatus for using blast-furnace slag in cement clinker production |
JP3580896B2 (ja) * | 1995-03-28 | 2004-10-27 | 太平洋セメント株式会社 | セメント混和材及び混合セメントの製造方法並びにその装置 |
US5837052A (en) * | 1997-04-10 | 1998-11-17 | Lafarge Canada Inc. | Process for producing cement clinker containing coal ash |
US5976243A (en) * | 1998-09-24 | 1999-11-02 | Lafarge Canada Inc. | Process for producing cement clinker containing blast furnace slag |
US6391105B1 (en) * | 2001-02-16 | 2002-05-21 | Lafarge Canada Inc. | Enhancement of cement clinker yield |
JP4908072B2 (ja) * | 2006-06-15 | 2012-04-04 | 太平洋セメント株式会社 | セメント添加材及びセメント組成物 |
RU2342337C1 (ru) * | 2007-06-01 | 2008-12-27 | Марсель Янович Бикбау | Способ производства цементного клинкера |
CN101792276B (zh) * | 2010-02-25 | 2011-12-21 | 东南大学 | 适合分离捕集co2的部分全氧型水泥生产方法 |
CN102173607A (zh) * | 2011-01-20 | 2011-09-07 | 赤壁市磨玉水泥有限公司 | 一种煤矸石煅烧制造水泥掺合料的煅烧方法 |
-
2011
- 2011-11-28 CN CN2011103852599A patent/CN102464458B/zh active Active
-
2012
- 2012-05-22 PL PL12854281T patent/PL2786973T3/pl unknown
- 2012-05-22 ES ES12854281T patent/ES2733310T3/es active Active
- 2012-05-22 BR BR112014012811A patent/BR112014012811A8/pt active Search and Examination
- 2012-05-22 WO PCT/CN2012/075900 patent/WO2013078839A1/zh active Application Filing
- 2012-05-22 RU RU2014125517/03A patent/RU2587653C1/ru not_active IP Right Cessation
- 2012-05-22 EP EP12854281.8A patent/EP2786973B1/en not_active Not-in-force
- 2012-05-22 US US14/360,874 patent/US9403718B2/en active Active
- 2012-05-22 MX MX2014006351A patent/MX349958B/es active IP Right Grant
-
2014
- 2014-06-25 ZA ZA2014/04668A patent/ZA201404668B/en unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1057821A (zh) | 1990-07-01 | 1992-01-15 | 中国矿业大学 | 煤矸石低温水泥生产方法及流化床煅烧装置 |
CN1072159A (zh) | 1992-11-15 | 1993-05-19 | 四川建筑材料工业学院 | 一种低温煅烧水泥熟料工艺 |
CN1124724A (zh) | 1995-05-05 | 1996-06-19 | 宋文奎 | 煤矸石煅烧制造水泥掺合料的方法及其煅烧窑炉 |
CN1236748A (zh) * | 1999-04-23 | 1999-12-01 | 潘光华 | 煅烧煤矸石制取活性水泥混合材的方法 |
CN1370750A (zh) * | 2001-02-27 | 2002-09-25 | 天津水泥工业设计研究院 | 处理工业和生活污泥的方法 |
CN1436745A (zh) * | 2002-02-06 | 2003-08-20 | 刘雁鸿 | 用工业废渣生产水泥混合材的方法 |
CN1546410A (zh) | 2003-12-01 | 2004-11-17 | 同济大学 | 大掺量煤矸石复合水泥及其制备方法 |
CN101407382A (zh) | 2008-11-12 | 2009-04-15 | 昆明阳光基业股份有限公司 | 干法水泥余热利用中窑头余热锅炉取风工艺的控制方法及其装置 |
CN102070308A (zh) * | 2010-12-01 | 2011-05-25 | 中信重工机械股份有限公司 | 利用水泥回转窑处理生活垃圾的设备工艺配置方法 |
CN102211886A (zh) * | 2011-03-10 | 2011-10-12 | 北川四星水泥有限公司 | 一种火山灰性混合材及其制备方法和应用 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2786973A4 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113233797A (zh) * | 2020-09-21 | 2021-08-10 | 合肥工业大学 | 一种煤矸石基胶凝材料及其制备方法 |
CN113233797B (zh) * | 2020-09-21 | 2023-01-06 | 合肥工业大学 | 一种煤矸石基胶凝材料及其制备方法 |
CN115321851A (zh) * | 2022-09-22 | 2022-11-11 | 北科蕴宏环保科技(北京)有限公司 | 一种绿色低碳高性能胶凝材料及制备方法 |
CN116499261A (zh) * | 2023-04-14 | 2023-07-28 | 合肥合意环保科技工程有限公司 | 一种电石生产冷却用的能量综合利用装置 |
CN116499261B (zh) * | 2023-04-14 | 2023-10-13 | 合肥合意环保科技工程有限公司 | 一种电石生产冷却用的能量综合利用装置 |
Also Published As
Publication number | Publication date |
---|---|
BR112014012811A2 (pt) | 2017-06-13 |
BR112014012811A8 (pt) | 2017-06-20 |
EP2786973A4 (en) | 2015-08-05 |
ZA201404668B (en) | 2015-08-26 |
EP2786973B1 (en) | 2019-02-06 |
CN102464458B (zh) | 2013-04-03 |
PL2786973T3 (pl) | 2019-08-30 |
MX349958B (es) | 2017-08-22 |
EP2786973A1 (en) | 2014-10-08 |
US20140318420A1 (en) | 2014-10-30 |
CN102464458A (zh) | 2012-05-23 |
US9403718B2 (en) | 2016-08-02 |
RU2587653C1 (ru) | 2016-06-20 |
MX2014006351A (es) | 2014-11-25 |
ES2733310T3 (es) | 2019-11-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2013078839A1 (zh) | 窑头外投料煅烧高活性混合材的方法和设备 | |
CN102942314B (zh) | 一种油井水泥及其生产方法 | |
WO2004058662A1 (en) | A two-component wet cement, process and application thereof | |
CN102234191A (zh) | 一种早强型矿山充填胶凝材料 | |
CN105217986B (zh) | 用新型干法旋窑线处理废石膏制建筑用石膏粉的方法 | |
CN103864320B (zh) | 低热矿渣硅酸盐水泥及其生产方法 | |
CN102351444B (zh) | 全废渣低温急剧煅烧高标号水泥熟料方法 | |
CN108892401A (zh) | 一种磷石膏煅烧贝利特硫铝酸盐水泥熟料的方法及水泥熟料 | |
CN107056100A (zh) | 一种水泥熟料的制备方法 | |
CN111018374A (zh) | 一种环保型水泥熟料及其制造工艺 | |
CN106904847A (zh) | 一种利用废弃混凝土水泥石相制备低烧复合水泥的方法 | |
CN110963721B (zh) | 一种利用干法水泥厂转型处理锰渣生产活性掺合材的方法 | |
CN101391868B (zh) | 惰性硅铝质物料的热液蚀变预处理工艺 | |
CN108275895B (zh) | 一种悬浮焙烧煤气化渣制备胶凝材料的方法 | |
CN106495623A (zh) | 一种利用钼尾矿制备蒸压砖的方法 | |
CN108609878A (zh) | 一种利用白泥制备磷铝酸盐胶凝材料的生产线及其工艺 | |
CN102173606A (zh) | 用废渣代替石灰石配料在水泥窑上煅烧水泥熟料的方法 | |
CN114990329A (zh) | 一种球团焙烧法制备高强轻集料的方法 | |
CN115057633A (zh) | 煤矸石基混凝土掺合料制备方法 | |
CN113955958A (zh) | 一种环保型高强度水泥及其制备方法 | |
CN103043928B (zh) | 一种黑色复合硅酸盐水泥及其生产方法 | |
CN108191270B (zh) | 一种悬浮焙烧煤气化渣制备少熟料水泥的方法 | |
CN105384371A (zh) | 水泥生料煅烧处理方法 | |
CN104446068B (zh) | 用沸腾炉焙烧污泥、废石膏生产贝利特-石膏材料的方法 | |
CN109928653A (zh) | 一种利用熔融态高炉渣直接水泥化的方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12854281 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14360874 Country of ref document: US Ref document number: MX/A/2014/006351 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012854281 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2014125517 Country of ref document: RU Kind code of ref document: A |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112014012811 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112014012811 Country of ref document: BR Kind code of ref document: A2 Effective date: 20140528 |