CN101219888A - Method for producing coal ash porcelain granule - Google Patents
Method for producing coal ash porcelain granule Download PDFInfo
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- CN101219888A CN101219888A CNA2008100061029A CN200810006102A CN101219888A CN 101219888 A CN101219888 A CN 101219888A CN A2008100061029 A CNA2008100061029 A CN A2008100061029A CN 200810006102 A CN200810006102 A CN 200810006102A CN 101219888 A CN101219888 A CN 101219888A
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- Prior art keywords
- coal ash
- dust
- porcelain granule
- flyash
- producing coal
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- 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
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The invention discloses a method for producing ceramisite of fly ash, which comprises the following steps: a. the fly ash is mixed with coal powders through a stirring equipment, and water accounting for 3 to 6 percent of the mixture weight is added during the stirring process; b. the mixed material is transported to a granulator and forms micronucleus inside; c. the material with micronucleus is made into meal balls inside a ball maker; d. the meal balls are sintered inside a sintering machine. By adopting the method, balls with excellent quality can be obtained under the condition without adding any adhesive; in addition, the production process is simplified, the production cost is reduced, and the problem of environment pollution during the production process of ceramisite is solved appropriately.
Description
Technical field
The present invention relates to a kind of haydite production method, more particularly, relate to a kind of method for producing coal ash porcelain granule that does not need to add binding agent.
Background technology
Common ceramisite sintered technology is at present: add binding agent in flyash, balling-up then, sintering.The binding agent that is adopted mainly is tonerde or wilkinite, dunn bass etc., and the addition of binding agent accounts for 35～50% of raw material weight usually.Owing to before binding agent adds, need it is carried out processing such as fragmentation, oven dry, levigate, mixing, therefore, increased production cost to a great extent, simultaneously because the discharging of dust has caused pollution to environment inevitably.
Summary of the invention
At the existing defective of existing ceramisite sintered technology, the invention provides a kind of method for producing coal ash porcelain granule that does not need to add binding agent.
Method for producing coal ash porcelain granule provided by the invention may further comprise the steps:
A. by whipping device flyash and coal dust are mixed, and in whipping process, add the water of the 3%-6% that accounts for mixture weight;
B. with mixed mass transport to tablets press, make and form micronucleus in the material;
C. make material in nodulizer, form raw material ball with micronucleus;
D. in sinter machine, raw material ball is carried out sintering.
In the method for the invention, described flyash mainly is meant receives the thin ash of catching the flue gas behind coal combustion, be the main solid waste that the coal-burning power plant discharges.Described coal dust is meant tiny coal particles.The present invention preferably adopts lower-cost coal dust, for example, adopts the coal gangue powder.
Preferably, described flyash is the fineness of collecting in the flue gas flyash less than 45 microns the heavy % in granule content 〉=65, and the carbon content of flyash is the heavy % of 3-6; Described fineness of pulverized coal is less than 150 microns.
Preferably, in described step c, in material, add the water of 3%-6% with micronucleus.
Preferably, in described steps d, the sintering temperature of described raw material ball is 800～1100 ℃, the travelling speed that carries the stove car of raw material ball be 0.5-1.5 rice/minute.
Preferably, the bottom of described sinter machine is provided with blower unit, makes that air-flow flows in the sintering process from top to bottom.
Preferably, described blower unit sucks dust chamber with the flue gas that produced in the sintering process, makes that most of dust sinks to the dust chamber bottom in the flue gas, and remaining dust enters electrostatic precipitator or sack cleaner by the dust chamber top exit.
Preferably, be provided with crusher, the pellet that bonds together behind the sintering is separated from each other by the effect of crusher in the downstream of sinter machine.
Preferably, below the sinter machine discharge port, be provided with the steel pipe suitable with the discharge port diameter, and steel pipe around be provided with discharge hole, the diameter of described discharge hole is greater than the diameter of pellet; Pellet is discharged in the described steel pipe.Preferably, the bottom of described steel pipe is far from ground 2-3 rice.
Compared with prior art, beneficial effect of the present invention is mainly reflected in following aspect:
Because haydite production method of the present invention do not need to add binding agent, not only obviously reduced production cost, simplified Production Flow Chart, and properly solved problem of environmental pollution in the haydite production process.
Method of the present invention provides a practicable outlet for the solid residue-flyash of coal-burning power plant.This method meets the Technological Economy requirement, and energy-conserving and environment-protective.
Compare with existing ceramic product, the haydite that adopts the method for the invention to produce has higher intensity, more regular profile, and can combine better with other material of construction.
Description of drawings
Fig. 1 is the schematic flow sheet of method for producing coal ash porcelain granule of the present invention.
Embodiment
Further describe method provided by the present invention below in conjunction with accompanying drawing, but therefore the present invention is not subjected to any restriction.
At first, make the flyash that is stored in respectively in the feed bin and coal dust by measuring apparatus and conveyor delivery to stirrer, thereby the coal dust that makes flyash and give certainty ratio is by stirring thorough mixing.Wherein, described flyash preferably adopts the flyash that power plant collects.Preferably, fineness is less than the heavy % in 45 microns granule content 〉=65 in the flyash, and the content of carbon is preferably 3-6% in the flyash.When the carbon content of flyash is lower than 3 weight %, need suitably to increase the adding proportion of coal dust, so that the carbon content of raw material maintains comparatively in the ideal scope, add coal dust ratio determine by the carbon content in the coal dust, the adding proportion of the coal dust that carbon content is low is higher, usually the adding proportion of coal dust is between 10%-2%, and promptly the ratio of flyash and coal dust is: 90: 10-98: 2.The fineness of described coal dust is preferably less than 150 microns, further preferably less than 120 microns.The fully automatic culculating method is preferably adopted in the metering of raw material, and Measuring Precision is generally 0.5-1%.Transfer roller adopts any this area handling equipment commonly used, for example, and worm conveyor, chapelet etc.
As shown in Figure 1, in step 101, to being delivered to the flyash in the stirrer and coal dust stirs and add a certain proportion of water in flyash and coal dust.Stirring by stirrer makes above-mentioned raw materials thorough mixing as much as possible.In the present embodiment, adopt and to add the high-strength blade stirrer of water spray type twin shaft in advance and stir.Described stirrer is provided with two stir shafts: active stir shaft and driven stir shaft.Be equipped with on two axles and stir the blade that material is used, and the stir shaft of blade mounting portion is the square-section, so not only increased moment of torsion, can also avoid the accumulation of material and stuck.Described stirrer can be the Chinese patent application of 200820004312.X referring to application number.Mass transport after stirring thorough mixing is to subsequent step.Wherein, in the whipping process, initiatively the stirring velocity of stir shaft is 120～140 rev/mins, and the time of material from the stirrer feed end to discharge end is 1～2 minute.
In step 102, the mass transport after stirring thorough mixing is to tablets press, and the high speed rotating by tablets press forms micronucleus in material.The process of granulation is: material high speed rotating by needle roller in tablets press makes the cylindrical wall of needle roller, body and material produce friction, forms small ball by friction.
In the present embodiment, adopt high speed to smash the piece tablets press and carry out the granulation processing, to form small ball.In material, form ball and can quicken the balling-up process of material in nodulizer, and can improve the intensity of pellet.Described high speed is smash the piece tablets press and is comprised: the drive unit that power is provided for the axis of rolling; The axis of rolling that is connected with drive unit; Be installed in the periphery of the axis of rolling and the length-adjustable needle roller that makes progress in the footpath of the described axis of rolling; Be installed in the propelling blade of the feed end of the axis of rolling; And the body that is enclosed in the axis of rolling, propelling blade and needle roller outside.It can be 200820004311.5 Chinese patent application referring to application number that described high speed is smash the piece tablets press.
In step 103, make material form pellet in the water pond formula nodulizer can regulating to add in advance with micronucleus.In the process of balling-up, can in having the material of micronucleus, further add the water (is benchmark with the weight of material) of 3%-6%, and the rolling of the pan-pelletizer by nodulizer grows up the material that wherein has micronucleus gradually, finally form the raw material ball of certain sphere diameter.Described raw material ball is delivered to the follow-up sintering step.
The pan-pelletizer edge that regulating in the present embodiment adds water pond formula nodulizer in advance has Height Adjustable edge guard, and the angle of pitch of pan-pelletizer can be regulated by the angular adjustment frame on the base, and the pan-pelletizer rotating speed is adjustable, wear-resistant scraper is adjustable, can be fit to multiple output requirement.The sphere diameter of raw material ball can be adjusted by baffle plate limit height, rotating speed, inclination angle and the doctor position of regulating described nodulizer.Described nodulizer can be 200820004313.4 Chinese patent application referring to application number.
In step 104, in sinter machine, raw material ball is carried out sintering." green compact " pellet of handling the back generation through the nodulizer balling-up evenly is layered on the sintering supporting plate of stove car, and the stove car that moves passes through sinter machine with certain speed.When " green compact " pellet passed through the igniting cover of sinter machine, burner wherein made the burning of " green compact " spherolite.Preferably between 800～1100 ℃, sintering time is by the travelling speed decision of the stove car that passes through sinter machine for sintering temperature in the burner, and preferably described stove car is with the speed operation of per minute 0.5-1.5m.Be provided with a series of blower units along the sinter machine length direction, described blower unit is from sinter machine bottom air inducing, make air-flow flow from the top down, airflow flowing is blown over just " green compact " pellet in the ignition zone, and described pellet is slowly burnt to middle level and bottom from the top layer.
When pellet reached the afterbody of sinter machine, whole sintering process was finished.Product behind the sintering of discharging from sinter machine afterbody exit is sent into the crusher of sinter machine afterbody, by the slow rotation of crusher, the pellet that bonds together in the sintering process is separated.
Preferably, utilize the blower unit of sinter machine bottom, the flue gas that sintering is produced sucks dust chamber, at the bottom of most of particle enters dust chamber and sinks to the chamber along with air-flow in the flue gas.Preferably be provided with electrostatic precipitator or sack cleaner at the dust chamber top, so that sintering tail gas and the dust carried secretly thereof enter static or sack cleaner by the dust chamber top exit.Static or sack cleaner can filter out most of dust, enter atmospheric Dust Capacity less than 50mg/m thereby can make
3
In the present embodiment, because what discharge when igniting is gas based on saturated steam, so behind dust chamber, can directly discharge; And the gas that is produced during sintering mainly is the flue gas that contains dust, and described flue gas enters atmosphere behind 14 dedusting storehouses through dust chamber and sack cleaner.Blowback falls into powder storehouse, bottom to the dust that sack cleaner leaches through order, and discharges by rotary valve, to reach dust separating purpose.Its dedusting index is less than 50mg/Nm
3
The sinter machine that adopts in the present embodiment comprises: the stove car that is used to load material to be sintered; Be used to transport the transport unit of described stove car; Be used for material to be sintered is laid in the distribution device of stove car; Be arranged at the combustion unit in described distribution device downstream; Be used to produce the bottom blower unit of downdraft, described bottom blower unit is arranged on the transport unit below; Be positioned at the combustion unit downstream, be used for the material behind the sintering is carried out broken shredder assembly.Described sinter machine can be 200820004310.0 Chinese patent application referring to application number.
In step 105, the pellet behind the sintering is delivered to stowed location.Preferably adopt the static technology of stacking of hollow steel column side-hole-type in the present embodiment, that is, a round steel pipe is arranged below the rotary conveyor discharging, the diameter of described steel pipe is determined according to the rotary conveyor width, pellet is fallen in the steel pipe, be provided with discharge hole around the steel pipe.The steel pipe bottom is apart from ground 2-3 rice, and after pellet piled with the steel pipe bottom, pellet then can overflow from the discharge hole around the steel pipe, is deposited in around the steel pipe.So both reduce airborne dust, and increased again and stacked height, saved the stacking area.
The following examples further specify method provided by the present invention, but therefore the present invention is not subjected to any restriction.
Embodiment 1
Adopt sintering process of the present invention, adding the fineness of collecting in the spontaneous combustion coal power-plant flue gas is the flyash of 40 microns granule content 65 heavy %, and the carbon content of flyash is 5 heavy %; Described coal dust is the coal gangue powder, and fineness is 100 microns, adds 5% water during stirring, and adds 5% water in the balling-up process in the material with micronucleus, and sintering temperature is 1000 ℃, and the stove car is with the speed operation of per minute 1m.With this understanding, every cubic metre of haydite power consumption of the haydite that obtains 15kwh, every cubic metre of haydite heat dissipation 40kg mark coal does not need to add binding agent, enters atmospheric dust concentration 50mg/m
3, 10mg/m in the workshop
3, haydite cylindrical compress strength 9Mpa, the coefficient of softening 0.9 of haydite, haydite concrete strength LC50, tap density 850kg/m
3, the water-intake rate of haydite is 12%, the porosity 40% of haydite, and overall labour productivity reaches 5000 tons/man-year.
Embodiment 2
Adopt sintering process of the present invention, adding the fineness of collecting in the spontaneous combustion coal power-plant flue gas is the flyash of 40 microns granule content 80 heavy %, and the carbon content of flyash is 6 heavy %; Described coal dust is the coal gangue powder, and fineness is 120 microns, adds 3% water during stirring, and adds 6% water in the balling-up process in the material with micronucleus, and sintering temperature is 900 ℃, and the stove car is with the speed operation of per minute 0.8m.With this understanding, every cubic metre of haydite power consumption of the haydite that obtains 18kwh, every cubic metre of haydite heat dissipation 42kg mark coal does not need to add binding agent, enters atmospheric dust concentration 55mg/m
3, 10mg/m in the workshop
3, haydite cylindrical compress strength 10Mpa, the coefficient of softening 0.95 of haydite, haydite concrete strength LC50, tap density 900kg/m
3, the water-intake rate of haydite is 11%, the porosity 35% of haydite, and overall labour productivity reaches 4500 tons/man-year.
Embodiment 3
Adopt sintering process of the present invention, adding the fineness of collecting in the spontaneous combustion coal power-plant flue gas is the flyash of 35 microns granule content 70 heavy %, and the carbon content of flyash is 3 heavy %; Described coal dust is the coal gangue powder, and fineness is 130 microns, adds 6% water during stirring, and adds 3% water in the balling-up process in the material with micronucleus, and sintering temperature is 1100 ℃, and the stove car is with the speed operation of per minute 1.2m.With this understanding, every cubic metre of haydite power consumption of the haydite that obtains 13kwh, every cubic metre of haydite heat dissipation 41kg mark coal does not need to add binding agent, enters atmospheric dust concentration 60mg/m
3, 12mg/m in the workshop
3, haydite cylindrical compress strength 12Mpa, the coefficient of softening 1.0 of haydite, haydite concrete strength LC50, tap density 950kg/m
3, the water-intake rate of haydite is 10%, the porosity 37% of haydite, and overall labour productivity reaches 5500 tons/man-year.
Comparative Examples 1
And adopt existing sintering process, need to add clay and carry out sintering with crucible.Particularly, adding fineness is the flyash of 40 microns granule content 65 heavy %, and the carbon content of flyash is 5 heavy %; The clay of interpolation 30% is as binding agent; Adding fineness of pulverized coal is 100 microns, adds 10% water during stirring, and adds 5% water in the balling-up process in the material with micronucleus, and sintering temperature is 1000 ℃, and the crucible type sintering time is 50 minutes.With this understanding, every cubic metre of power consumption 45kwh of the haydite that obtains, every cubic metre of haydite heat dissipation 100kg mark coal enters atmospheric dust concentration 150mg/m
3, dust concentration 75mg/m in the workshop
3, haydite cylindrical compress strength 8Mpa, the coefficient of softening 0.8 of haydite, haydite concrete strength LC30, tap density 700kg/m
3, the water-intake rate of haydite is 18%, the porosity 47% of haydite, and overall labour productivity reaches 600 tons/man-year.
Although the present invention is described by above-mentioned preferred embodiment, its way of realization is not limited to above-mentioned embodiment.Should be realized that under the situation that does not break away from purport of the present invention those skilled in the art can make different variations and modification to the present invention.
Claims (10)
1. a method for producing coal ash porcelain granule is characterized in that, this method may further comprise the steps:
A. by whipping device flyash and coal dust are mixed, and in whipping process, add the water of the 3%-6% that accounts for mixture weight;
B. with mixed mass transport to tablets press, make and form micronucleus in the material;
C. make material in nodulizer, form raw material ball with micronucleus;
D. in sinter machine, raw material ball is carried out sintering.
2. method for producing coal ash porcelain granule according to claim 1 is characterized in that, the weight ratio of described flyash and coal dust is 90: 10-98: 2.
3. method for producing coal ash porcelain granule according to claim 2 is characterized in that, described flyash is the fineness of collecting in the flue gas flyash less than 45 microns the heavy % in granule content 〉=65, and the carbon content of flyash is the heavy % of 3-6; Described coal dust is the coal gangue powder, and fineness is less than 150 microns.
4. method for producing coal ash porcelain granule according to claim 3 is characterized in that, adds the water of 3%-6% in described step c in the material with micronucleus.
5. method for producing coal ash porcelain granule according to claim 4 is characterized in that, in described steps d, the sintering temperature of described raw material ball is 800～1100 ℃, the travelling speed that carries the stove car of raw material ball be 0.5-1.5 rice/minute.
6. method for producing coal ash porcelain granule according to claim 5 is characterized in that the bottom of described sinter machine is provided with blower unit, makes that air-flow flows in the sintering process from top to bottom.
7. method for producing coal ash porcelain granule according to claim 6, it is characterized in that, described blower unit sucks dust chamber with the flue gas that is produced in the sintering process, make in the flue gas most of dust sink to the dust chamber bottom, remaining dust enters electrostatic precipitator or sack cleaner by the dust chamber top exit.
8. method for producing coal ash porcelain granule according to claim 7 is characterized in that, is provided with crusher in the downstream of sinter machine, and the pellet that bonds together behind the sintering is separated from each other by the effect of crusher.
9. according to claim 1 or 8 described method for producing coal ash porcelain granule, it is characterized in that, below the sinter machine discharge port, be provided with the steel pipe suitable with the discharge port diameter, and steel pipe around be provided with discharge hole, the diameter of described discharge hole is greater than the diameter of pellet; Pellet is discharged in the described steel pipe.
10. method for producing coal ash porcelain granule according to claim 9 is characterized in that, the bottom of described steel pipe is far from ground 2-3 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810006102A CN100590094C (en) | 2008-02-03 | 2008-02-03 | Method for producing coal ash porcelain granule |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810006102A CN100590094C (en) | 2008-02-03 | 2008-02-03 | Method for producing coal ash porcelain granule |
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| Publication Number | Publication Date |
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| CN101219888A true CN101219888A (en) | 2008-07-16 |
| CN100590094C CN100590094C (en) | 2010-02-17 |
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| CN200810006102A Expired - Fee Related CN100590094C (en) | 2008-02-03 | 2008-02-03 | Method for producing coal ash porcelain granule |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941850A (en) * | 2010-08-11 | 2011-01-12 | 昆明理工大学 | Method for firing ceramsite by coal slime |
| CN102167615A (en) * | 2010-12-24 | 2011-08-31 | 范宇泉 | Superstrong heat-preserving ceramsite and production method thereof |
| CN102358705A (en) * | 2011-08-17 | 2012-02-22 | 范峪铭 | Process for producing sintered ceramsite by using solid waste materials, and system thereof |
| CN102503530A (en) * | 2011-10-10 | 2012-06-20 | 金立虎 | Manufacturing method for waste industrial molding sand dust ceramsite |
| CN102503367A (en) * | 2011-10-08 | 2012-06-20 | 金立虎 | Method for manufacturing cobalt tailings ash aggregates |
| CN102503509A (en) * | 2011-10-19 | 2012-06-20 | 金立虎 | Grease-containing waste clay ceramsite and preparing method thereof |
| CN106588071A (en) * | 2016-12-29 | 2017-04-26 | 贵州盘江煤电建设工程有限公司 | Fly ash aggregate and preparation method thereof |
| CN108162134A (en) * | 2017-11-13 | 2018-06-15 | 神华集团有限责任公司 | The preparation facilities and method of lytag |
| CN110272285A (en) * | 2019-07-29 | 2019-09-24 | 黄河三角洲京博化工研究院有限公司 | A kind of high-calcium fly ass high-strength ceramic granule and preparation method thereof |
| CN113603496A (en) * | 2021-08-19 | 2021-11-05 | 北京大学 | Ceramsite prepared from high-content coal-based solid waste and preparation method thereof |
-
2008
- 2008-02-03 CN CN200810006102A patent/CN100590094C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941850A (en) * | 2010-08-11 | 2011-01-12 | 昆明理工大学 | Method for firing ceramsite by coal slime |
| CN101941850B (en) * | 2010-08-11 | 2013-01-16 | 昆明理工大学 | Method for firing ceramsite by coal slime |
| CN102167615B (en) * | 2010-12-24 | 2013-05-22 | 范宇泉 | Superstrong heat-preserving ceramsite and production method thereof |
| CN102167615A (en) * | 2010-12-24 | 2011-08-31 | 范宇泉 | Superstrong heat-preserving ceramsite and production method thereof |
| CN102358705A (en) * | 2011-08-17 | 2012-02-22 | 范峪铭 | Process for producing sintered ceramsite by using solid waste materials, and system thereof |
| CN102503367A (en) * | 2011-10-08 | 2012-06-20 | 金立虎 | Method for manufacturing cobalt tailings ash aggregates |
| CN102503367B (en) * | 2011-10-08 | 2013-07-24 | 金立虎 | Method for manufacturing cobalt tailings ash aggregates |
| CN102503530A (en) * | 2011-10-10 | 2012-06-20 | 金立虎 | Manufacturing method for waste industrial molding sand dust ceramsite |
| CN102503530B (en) * | 2011-10-10 | 2013-07-24 | 金立虎 | Manufacturing method for waste industrial molding sand dust ceramsite |
| CN102503509B (en) * | 2011-10-19 | 2013-05-15 | 金立虎 | Grease-containing waste clay ceramsite and preparing method thereof |
| CN102503509A (en) * | 2011-10-19 | 2012-06-20 | 金立虎 | Grease-containing waste clay ceramsite and preparing method thereof |
| CN106588071A (en) * | 2016-12-29 | 2017-04-26 | 贵州盘江煤电建设工程有限公司 | Fly ash aggregate and preparation method thereof |
| CN108162134A (en) * | 2017-11-13 | 2018-06-15 | 神华集团有限责任公司 | The preparation facilities and method of lytag |
| CN110272285A (en) * | 2019-07-29 | 2019-09-24 | 黄河三角洲京博化工研究院有限公司 | A kind of high-calcium fly ass high-strength ceramic granule and preparation method thereof |
| CN113603496A (en) * | 2021-08-19 | 2021-11-05 | 北京大学 | Ceramsite prepared from high-content coal-based solid waste and preparation method thereof |
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|---|---|
| CN100590094C (en) | 2010-02-17 |
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Granted publication date: 20100217 Termination date: 20130203 |