CN202016883U - Device for producing alumina clinker in semidry method - Google Patents
Device for producing alumina clinker in semidry method Download PDFInfo
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- CN202016883U CN202016883U CN2011200528758U CN201120052875U CN202016883U CN 202016883 U CN202016883 U CN 202016883U CN 2011200528758 U CN2011200528758 U CN 2011200528758U CN 201120052875 U CN201120052875 U CN 201120052875U CN 202016883 U CN202016883 U CN 202016883U
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- Prior art keywords
- pipeline
- dust collector
- suspension preheater
- rotary kiln
- stage
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- Expired - Lifetime
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 43
- 239000000428 dust Substances 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims 5
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 28
- 239000012716 precipitator Substances 0.000 description 22
- 239000010881 fly ash Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 19
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 239000000945 filler Substances 0.000 description 13
- 230000008676 import Effects 0.000 description 8
- 238000005245 sintering Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- 206010019332 Heat exhaustion Diseases 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
一种半干法生产氧化铝熟料的装置，其特征在于：回转窑与收尘器和烘干破碎机之间设有三个旋风分离器，除尘器的进气口通过管道与烘干破碎机的出气口连通，除尘器的出气口通过管道与收尘器的进气口连通；一级悬浮预热器的出气口通过管道与烘干破碎机的进气口连通，一级悬浮预热器和烘干破碎机连接的管道还与热风炉的出风口连通。本实用新型的装置能够大幅降低能量的消耗，减少污染，节约成本，制备相同数量产品所需回转窑的长度缩短20~25%，产能提高30~50%，单位产品能耗降低30%以上；与干法制备氧化铝熟料相比，本实用新型的装置不需要对传统的设备进行大量改造，采用现有的设备简单调整就能够完成，具有操作方便，简单实用的效果。
A device for producing alumina clinker by a semi-dry method, characterized in that three cyclone separators are arranged between the rotary kiln, the dust collector and the drying crusher, and the air inlet of the dust collector passes through the pipeline and the drying crusher The air outlet of the dust collector is connected with the air outlet of the dust collector through the pipe; the air outlet of the first-stage suspension preheater is connected with the air inlet of the drying crusher through the pipe; The pipeline connected with the drying crusher is also communicated with the air outlet of the hot blast stove. The device of the utility model can greatly reduce energy consumption, reduce pollution, save cost, shorten the length of the rotary kiln required to prepare the same quantity of products by 20-25%, increase the production capacity by 30-50%, and reduce the energy consumption per unit product by more than 30%; Compared with the preparation of alumina clinker by dry method, the device of the present invention does not require a lot of modification of traditional equipment, and can be completed by simple adjustment of existing equipment, and has the effect of convenient operation, simple and practical.
Description
Technical field
The utility model relates to the alumina clinker preparation facilities, and particularly a kind of semidrying is produced the device of alumina clinker.
Background technology
Present domestic sintering process is produced alumina clinker and is adopted wet processing, and the raw material water ratio of going into kiln is up to 39%; Because material heat exchange in the wet-process rotary kiln kiln is poor, unit volume grog production capacity is low, and thermo-efficiency is low, the about 6280MJ(1500MCal of heat that the grog of sintering 1t consumes) about, not only wastes a large amount of energy, required the specification of rotary kiln to strengthen simultaneously, floor space is big, and investment increases.
Summary of the invention
At existing wet production alumina clinker cost problem of higher, the utility model provides a kind of semidrying to produce the device of alumina clinker.
The device that a kind of semidrying of the present utility model is produced alumina clinker mainly comprises rotary kiln, cooler, burner, cyclonic separator, dust-precipitator, drying crusher, transfer roller, lift, filler bin, slip steel basin and hotblast stove; Wherein be provided with three cyclonic separators between rotary kiln and dust-precipitator and the drying crusher, a cyclonic separator is as fly-ash separator, two other cyclonic separator is respectively as first stage suspension preheater and secondary suspended preheater, the air outlet of rotary kiln is communicated with the discharge port of first stage suspension preheater and the inlet mouth of secondary suspended preheater by pipeline simultaneously, the opening for feed of rotary kiln is communicated with by the discharge port of pipeline with the secondary suspended preheater, and the air outlet of secondary suspended preheater is communicated with the inlet mouth of first stage suspension preheater and the discharge port of fly-ash separator by pipeline simultaneously; The inlet mouth of fly-ash separator is communicated with the air outlet of drying crusher by pipeline, and the air outlet of fly-ash separator is communicated with the inlet mouth of dust-precipitator by pipeline; The air outlet of first stage suspension preheater is communicated with the inlet mouth of drying crusher by pipeline, and the pipeline that the first stage suspension preheater is connected with drying crusher also is communicated with the air outlet of hotblast stove.
In the said apparatus, be respectively equipped with an air valve on the pipeline of the discharge port below of first stage suspension preheater, secondary suspended preheater and fly-ash separator, the pipeline that extend the air valve below of fly-ash separator is communicated with first stage suspension preheater and secondary suspended preheater respectively, and the pipeline that extend the air valve below of first stage suspension preheater is communicated with secondary suspended preheater and rotary kiln respectively.
In the said apparatus, the inlet mouth of rotary kiln is communicated with the outlet of rotary kiln burner, and the blast inlet of rotary kiln burner is communicated with a gas blower; The discharge port of rotary kiln is communicated with cooler.
In the said apparatus, the inlet mouth of hotblast stove is communicated with a blower export, and the opening for feed of hotblast stove is communicated with hot-blast stove gas burner, and this blower export is communicated with the blast inlet of hot-blast stove gas burner simultaneously.
In the said apparatus, the opening for feed of drying crusher is communicated with the discharge port of worm conveyor, and the pipeline that both are communicated with is provided with air valve, and the opening for feed of worm conveyor is communicated with filler bin and slip steel basin respectively; The pipeline that worm conveyor is communicated with filler bin is provided with feeding machine, and the pipeline that is communicated with between feeding machine and the filler bin is provided with flap type; Worm conveyor is provided with magnetic flow meter with the pipeline that the slip steel basin is communicated with, and the pipeline between magnetic flow meter and the slip steel basin is provided with electronic slurry valve.
The air outlet of dust-precipitator is communicated with by the import of pipeline with an induced draft fan in the said apparatus, and the outlet of this induced draft fan is communicated with chimney; Several discharge ports of dust-precipitator are communicated with the import of several primary conveyor, be equipped with air valve on the pipeline that both are communicated with, the outlet of each primary conveyor is communicated with the import of a two-stage conveying machine simultaneously, the outlet below of two-stage conveying machine is the import of lift, and the outlet below of lift is a filler bin.
Above-mentioned burner is multicenter combustor or single passage burner.
Above-mentioned dust-precipitator is dust precipitator or bag filter.
Above-mentioned cooler is rotary type single cylinder cooling machine, grate cooler or planetary cooler.
Above-mentioned gas blower is Root's blower or centrifugal blower.
The length-to-diameter ratio of above-mentioned rotary kiln (length/diameter) is 15 ~ 18.
The angle of taper of the cone of the bottom of above-mentioned cyclonic separator is 65 ~ 75 degree.
Above-mentioned worm conveyor is the powerful mixing worm conveyor, and the pitch of its blade is varying pitch, and pitch is along material delivery direction or increase gradually in the other direction.
The method of work of device of the present utility model is:
1, by being arranged on the roto-sifter of slip steel basin top, raw material is sieved, the slip that sifts out enters the slip steel basin, and the impurity that sifts out discards; The slip steel basin stirs material, make material and water be mixed into the wet stock of water weight content 35 ~ 40%, again the outlet of wet stock from the slip steel basin is discharged to the worm conveyor, worm conveyor is transported to wet stock in the drying crusher, wet stock and hot blast fully carry out heat exchange under the effect of hot-blast stove gas burner and gas blower, wet stock is broken up by oven dry gradually, moisture≤1% wherein, the dry material of temperature≤200 ℃ by pipeline transmission in fly-ash separator;
2, fly-ash separator separates dry material, the material that settles down after the separation enters the first stage suspension preheater by pipeline, the first stage suspension preheater is proceeded material to separate, material behind the separate and subside enters the secondary suspended preheater, the secondary suspended preheater is proceeded material to separate, and the settled material in separation back enters rotary kiln and carries out sintering; It is that 800 ~ 900 ℃ grog enters cooler that sintering is made temperature, in cooler, be blown into freezing air by gas blower, material and freezing air carry out heat exchange postcooling to 150 ~ 180 ℃, heated 450 ~ 550 ℃ of air admission rotary kilns of while, rotary kiln burner is blown into warm air in the rotary kiln by gas blower material is carried out sintering simultaneously;
3, gas that sintering produces in the rotary kiln and dust be discharged into from the air outlet in the pipeline between the opening for feed of the discharge port of first stage suspension preheater and secondary suspended preheater with and mixing of materials; Gas and dust that the first stage suspension preheater produces are discharged in the drying crusher from the air outlet, and to gas in the pipeline and dust heating, heated gas is in the same place with the mixing of materials in dust and the drying crusher by hotblast stove; Gas that the secondary suspended preheater produces and dust be discharged into from the air outlet in the pipeline between the opening for feed of the discharge port of fly-ash separator and first stage suspension preheater and and mixing of materials; The gas and the dust that produce in the fly-ash separator are discharged into the dust-precipitator from the air outlet;
4, the dust of process dust-precipitator collection is sent on the lift by the primary conveyor and the two-stage conveying machine of bottom, be sent in the filler bin through lift, feeding machine by the filler bin bottom is sent on the worm conveyor again, with the mixing of materials that from the slip steel basin, sends together, be sent in the drying crusher through screw conveyer;
5, collecting the waste gas that forms behind the dust in the dust-precipitator is sent in the chimney by induced draft fan.
In the aforesaid method, the discharge port material temperature of secondary suspended preheater is 650 ~ 700 ℃.
Device of the present utility model is provided with two suspended preheaters at rotary kiln, two preheaters can be recycled the production capacity that improves kiln to grog or the raw material that discharge in the gas air outlet of kiln tail, simultaneously the heat of kiln tail discharge gas is also reclaimed, the supply drying crusher is used for oven dry and breaks up gas, has reduced the heat exhaustion by hotblast stove; Prepare alumina clinker with wet method and compare, device of the present utility model can significantly reduce the consumption of energy, reduces and pollutes, save cost, the contraction in length 20 ~ 25% of the required rotary kiln of preparation equal amts product, production capacity improves 30 ~ 50%, and energy consumption of unit product reduces more than 30%; Compare with the dried preparation alumina clinker, device of the present utility model does not need traditional equipment is transformed in a large number, adopts simple adjustment of existing equipment just can finish, and has easy to operate, simple and practical effect.
Description of drawings
Fig. 1 is the structural representation that semidrying of the present utility model is produced the device of alumina clinker;
Among the figure 1, rotary kiln, 2, cooler, 3, rotary kiln burner, 4, the rotary kiln gas blower, 5, drying crusher, 6, the secondary suspended preheater, 7, the first stage suspension preheater, 8, fly-ash separator, 9, hotblast stove, 10, the hotblast stove gas blower, 11, hot-blast stove gas burner, 12, first air valve, 13, worm conveyor, 14, under meter, 15, electronic slurry valve, 16, feeding machine, 17, flap type, 18, filler bin, 19, the slip steel basin, 20, roto-sifter, 21, lift, 22, primary conveyor, 23, the two-stage conveying machine, 24, the dust precipitator air valve, 25, dust precipitator, 26, first loop expansion pipe, 27, the induced draft fan valve, 28, induced draft fan, 29, chimney, 30, second loop expansion pipe, 31, second air valve, 32, the 3rd loop expansion pipe, 33, the 4th loop expansion pipe, 34, the 3rd air valve, 35, the 5th loop expansion pipe, 36, the 6th loop expansion pipe, 37, the 4th air valve, 38, the 7th loop expansion pipe, 39, the 8th loop expansion pipe, 40, outside valve, 41 of connecting, the cooler gas blower.
Embodiment
The raw material that adopts among the utility model embodiment is Bayer process red mud, Wingdale and ground caustic circulation alkali liquor mixture;
The angle of taper of the cone of the first stage suspension preheater among the utility model embodiment, secondary suspended preheater and fly-ash separator bottom is respectively 65 degree, 67.5 degree and 75 degree;
Rotary kiln specification among the utility model embodiment is Φ 4.0 * 70 m, length-to-diameter ratio 17.5;
The specification of the first stage suspension preheater among the utility model embodiment is Φ 5630 * 11702 mm;
The specification of the secondary suspended preheater among the utility model embodiment is Φ 6080 * 12428 mm;
The specification of the fly-ash separator among the utility model embodiment is Φ 5786 * 14722 mm;
The thermal value of the hotblast stove among the utility model embodiment is 175 * 10
5KCal/h(700 ℃);
The specification of the drying crusher among the utility model embodiment is Φ 4250 * 2500 mm;
The dust-precipitator that adopts among the utility model embodiment is a dust precipitator, and specification is 160 m
2
The specification of the roto-sifter among the utility model embodiment is Φ 1200mm;
The specification of the slip steel basin among the utility model embodiment is Φ 6000 * 8000 mm;
Cooler among the utility model embodiment is monotubular formula revolution cooler, and specification is Φ 4000 * 45000 mm;
The air quantity that enters rotary kiln from the rotary kiln gas blower among the utility model embodiment accounts for and all enters 6 ~ 8% of rotary kiln air quantity cumulative volume;
The specification of second loop expansion pipe among the utility model embodiment, the 3rd loop expansion pipe, the 4th loop expansion pipe and the 7th loop expansion pipe is respectively Φ 600mm, Φ 3200mm, Φ 600mm and Φ 3100mm;
Worm conveyor among the utility model embodiment is the powerful mixing worm conveyor, and the pitch of its blade is varying pitch, increases gradually along material delivery direction pitch;
Gas blower among the utility model embodiment is a Root's blower;
Second air valve among the utility model embodiment and the specification of the 3rd air valve are Φ 600 mm;
The fuel that each burner among the utility model embodiment adopts is solid fuel, geseous fuel or liquid fuel, and the burner of employing is the single passage burner;
The alumina clinker that semidrying among the utility model embodiment is produced the device of alumina clinker has a daily output of 144t.
The apparatus structure of semidrying production alumina clinker comprises rotary kiln 1, cooler 2, rotary kiln burner 3, cyclonic separator, dust precipitator 25, drying crusher 5, worm conveyor 13, primary conveyor 22, lift 21, filler bin 18, two-stage conveying machine 23, slip steel basin 19 and hotblast stove 9 as shown in Figure 1; Wherein be provided with three cyclonic separators between rotary kiln 1 and dust precipitator 25 and the drying crusher 5, a cyclonic separator is as fly-ash separator 8, two other cyclonic separator is respectively as first stage suspension preheater 7 and secondary suspended preheater 6, the air outlet of rotary kiln 1 is communicated with the discharge port of first stage suspension preheater 7 and the inlet mouth of secondary suspended preheater 6 by pipeline simultaneously, the opening for feed of rotary kiln 1 is communicated with by the discharge port of pipeline with secondary suspended preheater 6, and the air outlet of secondary suspended preheater 6 is communicated with the inlet mouth of first stage suspension preheater 7 and the discharge port of fly-ash separator 8 by pipeline simultaneously; The inlet mouth of fly-ash separator 8 is communicated with by the air outlet of pipeline with drying crusher 5, and the air outlet of fly-ash separator 8 is communicated with by the inlet mouth of pipeline with dust precipitator 25; The air outlet of first stage suspension preheater 7 is communicated with by the inlet mouth of pipeline with drying crusher 5, and the pipeline that first stage suspension preheater 7 is connected with drying crusher 5 also is communicated with the air outlet of hotblast stove 9;
In the said apparatus, be respectively equipped with the 3rd air valve 34, second air valve 31 and the 4th air valve 37 on the pipeline of the discharge port below of first stage suspension preheater 7, secondary suspended preheater 6 and fly-ash separator 8, the pipeline that extend the 4th air valve 37 belows is communicated with the pipeline that extends 6, the three air valves, 34 belows respectively and is communicated with secondary suspended preheater 6 and rotary kiln 1 respectively with first stage suspension preheater 7 and secondary suspended preheater;
In the said apparatus, the inlet mouth of rotary kiln 1 is communicated with the outlet of rotary kiln burner 3, and the blast inlet of rotary kiln burner 3 is communicated with rotary kiln gas blower 4; The discharge port of rotary kiln 1 is communicated with cooler 2;
In the said apparatus, the inlet mouth of hotblast stove 9 is communicated with 10 outlets of hotblast stove gas blower, and the opening for feed of hotblast stove 9 is communicated with hot-blast stove gas burner 11, and 10 outlets of hotblast stove gas blower also are communicated with the blast inlet of hot-blast stove gas burner 11 simultaneously;
In the said apparatus, the opening for feed of drying crusher 5 is communicated with the discharge port of worm conveyor 13, and the pipeline that both are communicated with is provided with first air valve 12, the opening for feed of worm conveyor 13
RespectivelyBe communicated with filler bin 18 and slip steel basin 19; The pipeline that worm conveyor 13 is communicated with filler bin 18 is provided with feeding machine 16, and the pipeline that is communicated with between feeding machine 16 and the filler bin 18 is provided with flap type 17; The pipeline that worm conveyor 13 is communicated with slip steel basin 19 is provided with magnetic flow meter 14, and the pipeline between magnetic flow meter 14 and the slip steel basin 19 is provided with electronic slurry valve 15;
The air outlet of dust precipitator 25 is communicated with by the import of pipeline with induced draft fan 28, and the outlet of induced draft fan 28 is communicated with chimney 29; Several discharge ports of dust precipitator 25 are communicated with the import of several primary conveyor 24, the pipeline that both are communicated with is provided with dust precipitator air valve 24, the outlet of each primary conveyor 24 is communicated with the import of a two-stage conveying machine 23 simultaneously, the outlet below of two-stage conveying machine 23 is the import of lift 21, and the outlet below of lift 21 is a filler bin 18;
Pipeline between dust precipitator 25 and the induced draft fan 28 is provided with first loop expansion pipe 26 and induced draft fan valve 27;
Pipeline between dust precipitator 25 and the fly-ash separator 8 is provided with the 8th loop expansion pipe 39;
Pipeline between first stage suspension preheater 7 and the rotary kiln 1 is provided with the 3rd loop expansion pipe 32 and the 4th loop expansion pipe 33;
Pipeline between first stage suspension preheater 7 and the drying crusher 5 is provided with the 7th loop expansion pipe 38;
Pipeline between secondary suspended preheater 6 and the rotary kiln 1 is provided with second loop expansion pipe 30;
The pipeline that fly-ash separator 8 is communicated with first stage suspension preheater 7 is provided with the 6th loop expansion pipe 36, and the pipeline that fly-ash separator 8 is communicated with drying crusher 5 is provided with the 5th loop expansion pipe 35;
Adopt said apparatus to compare with wet method, the contraction in length 20 ~ 25% of the required rotary kiln of preparation equal amts alumina clinker, production capacity improves 30 ~ 50%, and energy consumption of unit product reduces more than 30%.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200528758U CN202016883U (en) | 2011-03-03 | 2011-03-03 | Device for producing alumina clinker in semidry method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200528758U CN202016883U (en) | 2011-03-03 | 2011-03-03 | Device for producing alumina clinker in semidry method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202016883U true CN202016883U (en) | 2011-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200528758U Expired - Lifetime CN202016883U (en) | 2011-03-03 | 2011-03-03 | Device for producing alumina clinker in semidry method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538493A (en) * | 2012-02-15 | 2012-07-04 | 个旧市富祥工贸有限责任公司 | Device for using waste heat of high-temperature smoke of bath smelting furnace directly |
| CN105271353A (en) * | 2015-09-23 | 2016-01-27 | 内蒙古生一伦稀土材料有限责任公司 | Calcination method for raising daily output of rare earth carbonate |
| CN106115752A (en) * | 2016-06-18 | 2016-11-16 | 江西中旭科技有限公司 | A kind of activated alumina process units and technique |
| CN109970087A (en) * | 2019-04-29 | 2019-07-05 | 沈阳鑫博工业技术股份有限公司 | A kind of device and method using the dry red mud sintered alumina clinker of Bayer process |
| CN114111323A (en) * | 2021-10-09 | 2022-03-01 | 中信重工机械股份有限公司 | Red mud clinker calcining preparation device and method |
-
2011
- 2011-03-03 CN CN2011200528758U patent/CN202016883U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538493A (en) * | 2012-02-15 | 2012-07-04 | 个旧市富祥工贸有限责任公司 | Device for using waste heat of high-temperature smoke of bath smelting furnace directly |
| CN102538493B (en) * | 2012-02-15 | 2014-04-09 | 个旧市富祥工贸有限责任公司 | Device for using waste heat of high-temperature smoke of bath smelting furnace directly |
| CN105271353A (en) * | 2015-09-23 | 2016-01-27 | 内蒙古生一伦稀土材料有限责任公司 | Calcination method for raising daily output of rare earth carbonate |
| CN105271353B (en) * | 2015-09-23 | 2017-01-18 | 北方稀土生一伦高科技有限公司 | Calcination method for raising daily output of rare earth carbonate |
| CN106115752A (en) * | 2016-06-18 | 2016-11-16 | 江西中旭科技有限公司 | A kind of activated alumina process units and technique |
| CN109970087A (en) * | 2019-04-29 | 2019-07-05 | 沈阳鑫博工业技术股份有限公司 | A kind of device and method using the dry red mud sintered alumina clinker of Bayer process |
| CN114111323A (en) * | 2021-10-09 | 2022-03-01 | 中信重工机械股份有限公司 | Red mud clinker calcining preparation device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111026 Effective date of abandoning: 20130320 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20111026 Effective date of abandoning: 20130320 |
|
| RGAV | Abandon patent right to avoid regrant |