CN101306924B - Method and apparatus for light-burning magnesium powder for rotary kiln - Google Patents
Method and apparatus for light-burning magnesium powder for rotary kiln Download PDFInfo
- Publication number
- CN101306924B CN101306924B CN2007100113014A CN200710011301A CN101306924B CN 101306924 B CN101306924 B CN 101306924B CN 2007100113014 A CN2007100113014 A CN 2007100113014A CN 200710011301 A CN200710011301 A CN 200710011301A CN 101306924 B CN101306924 B CN 101306924B
- Authority
- CN
- China
- Prior art keywords
- rotary kiln
- magnesium powder
- light
- kiln
- burning magnesium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 43
- 238000001354 calcination Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 4
- 239000011236 particulate material Substances 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000843 powder Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 12
- 239000000395 magnesium oxide Substances 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000001095 magnesium carbonate Substances 0.000 abstract description 5
- 235000014380 magnesium carbonate Nutrition 0.000 abstract description 5
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 abstract description 5
- 229910000021 magnesium carbonate Inorganic materials 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 11
- 238000000354 decomposition reaction Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 235000013339 cereals Nutrition 0.000 description 4
- 235000013312 flour Nutrition 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- -1 magnesium powder (activated magnesia Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/102—Preheating, burning calcining or cooling of magnesia, e.g. dead burning
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to a method and a device for soft burning of magnesium powder through a rotary kiln which relate to the technology of soft burning of magnesite pulverized powder, in particular to a method for producing the soft burning magnesium powder by utilization of the rotary kiln. The invention aims to provide a method for fair current soft burning of the magnesium powder through the rotary kiln with low investment, quickness in taking effect and high magnesia activity. The other aim of the invention is to provide a device for implementing the method. The method is as follows: materials and flame after magnesite is crushed enter from the high end of the rotary kiln, are led out from a draught fan on the outside of the low end, and perform fair current heat exchange in the rotary kiln. The device adopts the following structure: the rotary kiln comprises a kiln body; the high end and the low end of the kiln body are respectively provided with a support bracket; and motors on the support brackets are connected with the kiln body through driving mechanisms. The structural key points of the device are as follows: a material hopper and a burner are arranged outside an inlet on the high end of the kiln body, and the draught fan is arranged outside an outlet on the low end of the kiln body.
Description
Technical field:
The present invention relates to the technology of calcined wagnerite flour material, particularly utilize rotary kiln to produce the method and the device of light-burning magnesium powder.
Background technology:
In order to improve the activity of magnesium oxide (MgO), generally the method for using is wagnerite (MgCO more
3) carry out light-burned activation treatment:
Magnesian activity and light roasting temperature have direct relation.Wagnerite (MgCO
3) decomposition temperature be about 700 ℃, decompose in this temperature that magnesium oxide (MgO) granularity of producing is very little, activity is very big.Temperature is low again, and wagnerite can not decompose, and causes " give birth to and burn ", produces raw material; Temperature increases again, and the magnesium oxide particle glomerocryst causes " dead roasting ", and activity diminishes.How according to the lumpiness of wagnerite, controlling suitable temperature, is two important factors of light-burning magnesium powder activating technology.
The existing technology of producing light-burning magnesium powder (activated magnesia) has: reverberatory furnace, fluidizing furnace, shower furnace etc.Reverberatory furnace is applicable to the wagnerite raw material of lumpiness 80-130mm, and light roasting temperature is 1200-1300 ℃, and the contact area is little between gas-solid, and calcination time long (about 2 hours) easily causes material " dead roasting ".Inapplicable to the powder calcining.Fluidizing furnace is applicable to the raw material of granularity 5-25mm, but facility investment is big, and the siege wearing and tearing are big, and the maintenance amount is also big.
The method of the reverse-flow rotary kiln calcining of utility model patent ZL200420115666.3 and application for a patent for invention number 200510108342.6 described fluidizing furnaces activated magnesia also is inapplicable to calcined wagnerite flour material.Because the calcining process of above-mentioned two patents is: the reverse-flow heat exchange in kiln of material and hot flue gas.This mode only is applicable to that (granularity 〉=55mm), (granularity≤4mm) is inapplicable to particulate material to powder.Because during calcining wagnerite powder, when material enters in the kiln from rotary kiln high-end (kiln tail), thinner part granularity in the powder (granularity≤0.5mm) also not through light-burned decomposition course, taken away by the induced draft fan of kiln tail and the negative pressure that the smoke evacuation equipment causes with regard to very fast, cause the ripe fine powder of light-burned decomposition in the kiln and do not have one of the living fine powder of light-burned decomposition to be stored in same feed bin, intractable and use cause the waste of the material and the energy.Therefore, the described light-burned technology of above-mentioned two patents only is applicable to the particulate material of wagnerite greater than 10mm, is not suitable for the light-burned of fine powder.
Shower furnace is that (general enterprise is unable purchases for the sophisticated equipment of granularity＜0.088mm), but because complex structure, huge, cost of equipment height (7-8 10,000,000 Renminbi/platform) for calcined wagnerite fine powder raw material; And the wagnerite fine powder that produces in the wagnerite recovery process is deposited in around the mining, and Haicheng City only, the area, Dashiqiao just has several ten million tons, the environment around the severe contamination.
Summary of the invention:
The object of the present invention is to provide a kind of less investment, instant effect, the active high rotary kiln downflow system light-burning magnesium powder method of magnesium oxide; Another object of the present invention also is to provide the equipment of this method of enforcement.
For achieving the above object, method of the present invention is that material and the flame after wagnerite is pulverized enters from rotary kiln is high-end, is drawn from low side by the induced draft fan that low side is outer, and the material after the pulverizing carries out the downflow system heat exchange with the combustion flame in rotary kiln.
For implementing the method for this invention, the present invention adopts following structure: rotary kiln comprises the kiln body, eminence, the lower of kiln body are respectively arranged with rest, motor on the rest links to each other with the kiln body by transmission rig, the high-end inlet of its structural feature kiln body is outside equipped with silo, burner, and the outlet of low side is outside equipped with induced draft fan.
Beneficial effect of the present invention:
1, less investment, instant effect:
Because the present invention is the production method that adopts the downflow system light-burning magnesium powder, makes its structure also very simple, has the characteristics of less investment, instant effect; The facility investment of this invention only is 2,000,000～3,000,000 Renminbi, is the 2%-4% of kiln investment of suspending at present, and general enterprise all can use; The existing magnesite mining site a large amount of wagnerite powders on every side that are stacked at are fully utilized, and turn waste into wealth;
2, magnesium oxide is active big:
Because the present invention adopts the production method of downflow system light-burning magnesium powder, in the aspiration procedure of kiln body revolution and induced draft fan, make that the same flame of magnesite stone flour (comprising flue gas) spirally advances, thorough mixing, the magnesite stone flour obtains balanced heating, decomposes, therefore, can obtain highly active magnesium oxide; In addition, because the present invention's employing is 850～900 ℃ of light roasting temperatures, saved the energy.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is rotary kiln of the present invention and relevant device structural representation;
Fig. 3 is the structural representation of material delivering plate of the straight flange of rotary kiln I-I section;
Fig. 4 is the structural representation of material delivering plate of the square edge of rotary kiln II-II section;
Fig. 5 is the structural representation of material delivering plate of the obtuse angle edge of rotary kiln III-III section;
Fig. 6 is the structural representation of the open-work dividing plate with round open-work of rotary kiln IV-IV section;
Fig. 7 is the structural representation of the open-work dividing plate with arcuate socket of rotary kiln V-V section.
Embodiment:
Method of the present invention is that material and the flame after wagnerite is pulverized enters from rotary kiln 16 high-end A, is drawn from low side B by the induced draft fan 18 that low side B is outer, and the material after the pulverizing carries out the downflow system heat exchange with the combustion flame in rotary kiln 16.
For obtaining highly active magnesium oxide, at first sieve through vibratory screening apparatus 1, screen overflow material (＞4～30mm particle) is broken on twin rollers 29, and the particle that will reach 0～4mm deposits storage bin 2 in; By after 4 weighings of truck 3 process platform scales, go into 5 preheatings of preheating storehouse then, enter rotary kiln 16 by screw feeder 6 through silo 7 again.
The purpose of the 5 pairs of material preheatings in preheating storehouse before the rotary kiln 16 is to be to improve material temperature, avoids producing in the rotary kiln 16 the raw material wagnerite.
For making rotary kiln 16 insulation, prevent heat radiation, build with asbestos plate and refractory castable at the internal surface of the iron-clad of rotary kiln 16 and to form thermofin.
Raw meal particle size (0～4mm) and the prerequisite determined of the highest calcining temperature (850～900 ℃) under, should strict control material in time length of high calcining temperature, realize that material decomposes, does not have again " dead roasting " fully, thereby reach the activity of maximum.For this reason, before rotary kiln 16 is installed, should set the gradient (being the quiet height of rotary kiln 16 high-end A and rotary kiln 16 low side B) of rotary kiln 16 and adjust the velocity of rotation of rotary kiln 16; With determine material from high-end A to low side B progressive speed, just determine the time that material continues in the high-temperature zone.Under the condition that the gradient and the rotating speed of rotary kiln 16 are determined, should lean on material delivering plate 30 and open-work dividing plate 31 in the rotary kiln 16 to reconcile material progressive speed.
After material was gone into rotary kiln 16, by the effect of the rotation of rotary kiln 16 and material delivering plate 30, open-work dividing plate 31, price hike formed the material curtain repeatedly in rotary kiln 16, and advances with spiral; Accept the flame heating of (comprising flue gas) simultaneously.Fine powder part (the granularity＜, at first resolve into MgO and CO of material 0.088mm) at decomposition temperature (700 ℃)
2, and burned thing and hot gas flow are taken away; The partly price hikes repeatedly in rotary kiln 16 of all the other particles in the material, and spiral advance between the particle, collide between particle and rotary kiln 16 walls and material delivering plate 30, the open-work dividing plate 31, produce some fine powders repetition said process again; Particle is along with temperature raises, and bursts, decomposition etc.Thin more, the first more decomposition of fine powder and being pulled away like this, the time is short more in rotary kiln 16; Big more, the decomposition more after a while of particle, the time is long more in rotary kiln 16.Realize balanced calcining like this, can " not give birth to and burn " and " dead roasting ".After measured, granularity is 0～4mm material, calcining in rotary kiln 16, and temperature is 850～900 ℃, continues 35 minutes, has realized decomposing fully, does not have the generation of " dead roasting " phenomenon.
Wagnerite decomposes in rotary kiln 16 goes out MgO particulate and CO
2Gas, and impure Al
2O
3, SiO
2, Fe
2O
3, CaO etc. ore; In being subjected to thermal process, can form eutectic, cause particle bigger, promptly so-called " slag nodule ".In induced draft fan 18 aspiration procedure, four storing classifications are set: slag nodule pilot trench 24, gravity classification coarse fodder district (being divided into particulate groove 21, middle grain groove 22, coarse grain groove 23 again), rotoclone collector 20, cloth bag collector 19.
Material after the calcining is after the low side B outflow of rotary kiln 16, at first store up at transitional storehouse 26, carry out classification through air inducing, fall within successively in slag nodule pilot trench 24, coarse grain groove 23, middle grain groove 22, the particulate groove 21 according to particle footpath size (being the weight size), then, through rotoclone collector 20, cloth bag collector 19, flue gas is discharged again.
Particle is more little, and activity is big more.
The flue dust that rotary kiln 16 low side B dischargings cause by induced draft fan 28 and tornado dust collector 27, enters storage bin 2 and digests.
Ability for the smoke evacuation dirt that increases rotary kiln 16 also can be provided with gas blower 25 in the exit of transitional storehouse 26.
Claims (9)
1. light-burning magnesium powder for rotary kiln method, it is characterized in that material and flame after the wagnerite pulverizing are entered from rotary kiln (16) high-end (A), drawn from low side (B) by the induced draft fan (18) that low side (B) is outer, the material after the pulverizing carries out the downflow system heat exchange with the combustion flame in rotary kiln (16).
2. light-burning magnesium powder for rotary kiln method according to claim 1, it is characterized in that wagnerite is ground into 0～4mm particulate material after, through preheating storehouse (5) preheating, enter rotary kiln (16).
3. light-burning magnesium powder for rotary kiln method according to claim 1 and 2 is characterized in that 0～4mm particulate material in rotary kiln (16), and calcining temperature is 850～900 ℃, continues 35 minutes.
4. light-burning magnesium powder for rotary kiln device, rotary kiln (16) comprises kiln body (17), eminence, the lower of kiln body (17) is respectively arranged with rest (13), and the motor (14) on the rest (13) links to each other with kiln body (17) by transmission rig (15), it is characterized in that the high-end of kiln body (17)
Inlet be outside equipped with silo (7), burner (10), the outlet of low side (B) is outside equipped with induced draft fan (18).
5. light-burning magnesium powder for rotary kiln device according to claim 4 is characterized in that burner (10) comprises gas pipe (11), outer airduct (9), the water pipe (8) of being followed successively by of gas pipe (11); In the front end of gas pipe (11), airduct (9) is mixing section (12).
6. light-burning magnesium powder for rotary kiln device according to claim 4 is characterized in that internal surface asbestos plate and refractory castable build formation thermofin at the iron-clad of rotary kiln (16).
7. light-burning magnesium powder for rotary kiln device according to claim 4 is characterized in that being provided with material delivering plate (30) and open-work dividing plate (31) in rotary kiln (16).
8. light-burning magnesium powder for rotary kiln device according to claim 7 is characterized in that material delivering plate (30) is the material delivering plate (30) of the material delivering plate (30) of straight flange (32), square edge (33), the material delivering plate (30) of obtuse angle edge (34).
9. light-burning magnesium powder for rotary kiln device according to claim 7 is characterized in that open-work dividing plate (31) is the open-work dividing plate (31) with round open-work (35), the open-work dividing plate (31) with arcuate socket (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100113014A CN101306924B (en) | 2007-05-15 | 2007-05-15 | Method and apparatus for light-burning magnesium powder for rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100113014A CN101306924B (en) | 2007-05-15 | 2007-05-15 | Method and apparatus for light-burning magnesium powder for rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101306924A CN101306924A (en) | 2008-11-19 |
| CN101306924B true CN101306924B (en) | 2010-07-07 |
Family
ID=40123635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100113014A Expired - Fee Related CN101306924B (en) | 2007-05-15 | 2007-05-15 | Method and apparatus for light-burning magnesium powder for rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101306924B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102728165A (en) * | 2012-07-17 | 2012-10-17 | 重庆钢铁(集团)有限责任公司 | Method for recovering raise dust of sintering flux |
| CN102978377A (en) * | 2012-11-29 | 2013-03-20 | 长沙矿冶研究院有限责任公司 | Powder material rotary kiln reducing roasting device and process using device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011028085A1 (en) * | 2009-09-07 | 2011-03-10 | Kravecs Eduards | Heat generation method |
| CN110204226B (en) * | 2019-06-21 | 2024-04-30 | 李胜日 | Powder material high-temperature suspension fluidization rapid calcination process and system |
| CN110285676A (en) * | 2019-06-21 | 2019-09-27 | 王克非 | A horizontal rolling suspension calcination device for powder materials |
| CN112628752B (en) * | 2021-01-26 | 2025-02-21 | 济南德正环保科技有限公司 | Hazardous waste incinerator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049324A (en) * | 1990-09-19 | 1991-02-20 | 袁锐 | Method of burning magnesia slightly by non-direct and equipment thereof |
| CN2769253Y (en) * | 2004-11-18 | 2006-04-05 | 王�华 | Fluidized bed furnace counter-flow rotary kiln calcining equipment for active magnesium oxide |
| CN1772677A (en) * | 2005-10-12 | 2006-05-17 | 王全祥 | Magnesia calcining boiling furnace rotary kiln method and apparatus |
-
2007
- 2007-05-15 CN CN2007100113014A patent/CN101306924B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049324A (en) * | 1990-09-19 | 1991-02-20 | 袁锐 | Method of burning magnesia slightly by non-direct and equipment thereof |
| CN2769253Y (en) * | 2004-11-18 | 2006-04-05 | 王�华 | Fluidized bed furnace counter-flow rotary kiln calcining equipment for active magnesium oxide |
| CN1772677A (en) * | 2005-10-12 | 2006-05-17 | 王全祥 | Magnesia calcining boiling furnace rotary kiln method and apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102728165A (en) * | 2012-07-17 | 2012-10-17 | 重庆钢铁(集团)有限责任公司 | Method for recovering raise dust of sintering flux |
| CN102728165B (en) * | 2012-07-17 | 2014-06-04 | 重庆钢铁(集团)有限责任公司 | Method for recovering raise dust of sintering flux |
| CN102978377A (en) * | 2012-11-29 | 2013-03-20 | 长沙矿冶研究院有限责任公司 | Powder material rotary kiln reducing roasting device and process using device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101306924A (en) | 2008-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101306924B (en) | Method and apparatus for light-burning magnesium powder for rotary kiln | |
| CN109776002A (en) | A kind of the suspension calcining activation system and method for Suitable clays mine tailing | |
| CN108264248A (en) | A kind of light-burned MgO suspension calcinings production technology and device | |
| CN103435276B (en) | Production apparatus of active lime | |
| CN1966443A (en) | Cement chamotte production method of calcium carbide 100% substituting for natural calcic material and decomposed out of kiln | |
| CN101776269A (en) | N-level incineration treatment technology for domestic garbage | |
| CN101265041B (en) | Technique for using dry discharging carbide slag to completely substitute natural calcareous raw material for producing cement chamotte | |
| CN102173608A (en) | Method for preparing cement clinker from high-proportion carbide slag through decomposition outside kiln of five-stage preheater | |
| CN108585555B (en) | Industrial powder clinker homogeneous calcination preparation equipment and preparation method | |
| CN109970375A (en) | A kind of building gypsum plaster production line | |
| CN109437608A (en) | A kind of two-way wind built-in heat exchanger lime shaft kiln and its method for calcinating | |
| CN103342371A (en) | Process and device for whitening calcined black talc | |
| CN102992661A (en) | Beam type heat storage lime kiln | |
| CN102190449A (en) | Light burning system and method of magnesite | |
| CN114812161A (en) | Equipment and method for producing magnesia product by adopting suspension preheating rotary kiln one-step method | |
| CN103468934B (en) | Powdery difficulty selects iron ore of low ore grade multistage fluidised form magnetizing roasting method | |
| CN204923825U (en) | Alumina shaft kiln is calcined to flaring formula circular section | |
| CN108314335A (en) | A kind of light-burned MgO suspension kilns coproduction Mg (OH)2Production technology and device | |
| CN208296584U (en) | A kind of burning facility producing flying dust chelating agent | |
| CN203474654U (en) | Heat storage type rotary kiln | |
| CN214747299U (en) | Device for producing mineral admixture by using coal gangue | |
| CN205953844U (en) | Utilize industrial furnace of likepowder limestone calcination lime | |
| CN85108710B (en) | Method and device for light burning magnesite in fluidized bed furnace | |
| CN101738081A (en) | Shaft kiln | |
| CN211339311U (en) | High-temperature magnesium oxide calcining device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20130515 |