CN110028091A - A kind of Bayer process red mud production aluminium oxide wet laid furnishes dry sintering technique - Google Patents
A kind of Bayer process red mud production aluminium oxide wet laid furnishes dry sintering technique Download PDFInfo
- Publication number
- CN110028091A CN110028091A CN201810550195.5A CN201810550195A CN110028091A CN 110028091 A CN110028091 A CN 110028091A CN 201810550195 A CN201810550195 A CN 201810550195A CN 110028091 A CN110028091 A CN 110028091A
- Authority
- CN
- China
- Prior art keywords
- bayer process
- red mud
- kiln
- process red
- aluminium oxide
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/0613—Pretreatment of the minerals, e.g. grinding
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/0646—Separation of the insoluble residue, e.g. of red mud
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/08—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals with sodium carbonate, e.g. sinter processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to field of aluminum oxide production more particularly to a kind of Bayer process red mud to produce aluminium oxide wet laid furnishes dry sintering technique.Be made of following processes or step: Bayer process red mud dehydration, Bayer process crystalline alkali are dehydrated, raw slurry is ground, preheating, clinkersintering, clinker cooling etc. outside drying raw meal, raw material kiln.The hot fume heat that chamotte kiln can be made full use of to be discharged after the present invention reduces radiation loss, and energy consumption needed for significantly reducing clinkersintering substantially shortens chamotte kiln length, improves chamotte kiln production capacity.
Description
Technical field
The present invention relates to field of aluminum oxide production more particularly to a kind of Bayer process red mud to produce aluminium oxide wet laid furnishes dry method
Sintering process.
Background technique
Alumina producing uses Bayer process, sintering process and combination method, and series process is one kind of combination method.Series process is first with energy
Low Bayer process processing ore is consumed, it is then red with sintering process processing Bayer process again after extracting the aluminium oxide in ore to greatest extent
Mud recycles alkali and aluminium oxide therein.The advantages of series process is mainly: 1. alumina recovery rate is high in bauxite；2. alkaline consumption is low；
3. being very suitable for handling low-grade bauxite, production cost at this time is lower than other production methods.Producing alumina through series process
Existing main problem is that energy consumption is higher, the main reason is that there are indispensable highly energy-consuming clinkersinterings for series process production process
Process.Therefore, reduce to the maximum extent clinkersintering energy consumption in series process be the target pursued for a long time of alumina industry it
One.
Currently, clinkersintering is all that raw slurry wet process enters kiln sintering in alumina producing, raw slurry moisture generally all exists
36%~42%, a large amount of thermal energy will be consumed by evaporating these moisture by chamotte kiln.If directlying adopt red mud dehydration dry mixing
It is uneven to often result in ingredient, causes clinker quality poor, aluminium oxide and sodium oxide molybdena dissolution rate are low.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of Bayer process red mud production aluminium oxide wet laid furnishes dry method to burn
Knot technique can reduce clinkersintering energy consumption significantly, substantially contract in conjunction with the advantage of the uniform dry sintering energy conservation of wet laid furnishes
Short chamotte kiln length improves chamotte kiln production capacity.
In order to solve the above-mentioned technical problem, the technical scheme is that
A kind of Bayer process red mud production aluminium oxide wet laid furnishes dry sintering technique, includes the following steps:
(1) Bayer process red mud is dehydrated: Bayer process red mud moisture content being down to 50% or less using mechanical dehydration；
(2) Bayer process crystalline alkali is dehydrated: Bayer process crystalline alkali moisture content being down to 40% or less using mechanical dehydration；
(3) prepared by raw slurry: dewatered Bayer process red mud, Bayer process crystalline alkali and soda ash, lime stone and raw material coal
It is sent into grinding machine, is prepared into qualified raw slurry using allotment after classification and sorting, raw slurry moisture is 30~45%；
(4) drying raw meal: raw slurry enters dryer, is dried using hot gas, raw material moisture≤5% out；
(5) it is preheated outside raw material kiln: the raw material after drying preheat outside kiln；
(6) clinkersintering: the raw material after preheating, which enter in chamotte kiln, to be sintered；
(7) clinker cooling: after sintered high temperature chamotte is cooling, Clinker digestion process is sent to.
The Bayer process red mud dehydration uses vertical-disk filter, horizontal belt filter, ceramic filter, automatically boxing
One of filter press or vacuum-type drum filter.
The Bayer process crystalline alkali dehydration uses ceramic filter, vertical-disk filter, automatically boxing filter press or vacuum
One of rotary drum filter.
The raw slurry preparation is ground using tube mill, is sorted by grader or water conservancy cyclone, then
By raw mix slurry preparing process, it is deployed into qualified raw slurry.
The drying raw meal uses vertical static baker, and raw slurry is by being pumped into baker and hot-blast stove or chamotte kiln
Tail gas mixing, is dried, exhaust gas temperature≤75 DEG C after drying, raw material discharging moisture content≤5%.
Preheating is using the pre-heating system of mulitistage cyclone composition outside the raw material kiln, and preheating heat source is using self heating out
Expect the hot fume of kiln tail.
The clinkersintering use rotary kiln, chamotte kiln length be conventional wet sintered clinker kiln length 30%~
70%.
The clinker cooling is using one of single cylinder cooling machine, grate cooler or planetary cooler.
The invention has the advantages and beneficial effects that:
The present invention is preheated outside using Bayer process red mud and crystalline alkali mechanical dehydration, raw slurry preparation, drying raw meal, kiln, is raw
Expect the technical process such as dry sintering, the hot fume heat that chamotte kiln can be made full use of to be discharged greatly shortens chamotte kiln length, drop
Low heat emission loss, reduce the energy consumption of clinkersintering, substantially shorten chamotte kiln length (be wet process sintered clinker kiln length 30%~
70%) chamotte kiln production capacity, can be improved, improve 50~75% with diameter kiln production capacity.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
As shown in Figure 1, in the specific implementation process, the present invention is dropped Bayer process red mud moisture content using mechanical dehydration mode
To 50wt% hereinafter, Bayer process crystalline alkali moisture content is down to 40wt% or less using mechanical dehydration mode；It is visitd dewatered
Ear method red mud, Bayer process crystalline alkali, soda ash and lime stone and raw material coal are sent into grinding machine progress raw slurry and are ground, by classification
It is prepared into qualified raw slurry using allotment after sorting, raw slurry moisture is in 30~45wt%；Qualified raw slurry enters dryer,
Drying raw meal is carried out using hot gas, raw material moisture≤5wt% out；Using the preheating system of the above cyclone preheater composition of two-stage
Raw material (or together with firing coal) after drying preheat outside kiln by system, and heat source uses the hot fume from clinker kiln tail, preheating
Raw material afterwards, which enter in chamotte kiln, to be sintered；Sintered clinker, which enters cooler, to carry out after cooling down, and sends to Clinker digestion work
Sequence.
The embodiment of the present invention combination attached drawing is described in detail below, but protection scope of the present invention is not by embodiment
It is limited.
Embodiment 1
In the present embodiment, after Bayer process red mud and crystalline alkali are using vertical-disk filter dehydration, with soda ash, lime stone and raw material
Coal is sent into tube mill, and through toning with qualified raw slurry is prepared into after being sorted using grader, raw slurry moisture is in 36wt%；It is qualified
Raw slurry is sent into vertical static dryer by centrifugal pump, is dried using hot air furnace hot air, raw material moisture 5wt% out,
70 DEG C of hot wind exhaust gas temperature；Mulitistage cyclone (the present embodiment is Pyatyi) is used to carry out in the raw material after drying pre- outside kiln
Heat, heat source use the hot fume from clinker kiln tail；Raw material after preheating, which enter, carries out dry sintering in chamotte kiln, sintered
Clinker sends to Clinker digestion process after entering single cylinder cooling machine cooling.
Embodiment 2
Other are same as Example 1, and Bayer process red mud and crystalline alkali dehydration use ceramic filter, the heat source of drying raw meal
Using grog kiln tail gas is come from, clinker cooling uses grate-cooler.
Embodiment 3
Other are same as Example 1, and Bayer process red mud and crystalline alkali dehydration use horizontal belt filter, raw slurry sorting
Using water conservancy cyclone, clinker cooling uses planetary cooler.
Embodiment 4
Other are same as Example 1, and only Bayer process red mud and crystalline alkali dehydration use automatically boxing filter press.
Embodiment 5
Other are same as Example 1, and only Bayer process red mud dehydration uses vacuum-type drum filter.
Embodiment the result shows that, the present invention can make full use of chamotte kiln be discharged hot fume heat, reduce radiation loss,
Energy consumption needed for significantly reducing clinkersintering substantially shortens chamotte kiln length, improves chamotte kiln production capacity.
Claims (8)
1. a kind of Bayer process red mud produces aluminium oxide wet laid furnishes dry sintering technique, which is characterized in that include the following steps:
(1) Bayer process red mud is dehydrated: Bayer process red mud moisture content being down to 50% or less using mechanical dehydration；
(2) Bayer process crystalline alkali is dehydrated: Bayer process crystalline alkali moisture content being down to 40% or less using mechanical dehydration；
(3) prepared by raw slurry: dewatered Bayer process red mud, Bayer process crystalline alkali and soda ash, lime stone and raw material coal are sent into
Grinding machine is prepared into qualified raw slurry using allotment after classification and sorting, and raw slurry moisture is 30~45%；
(4) drying raw meal: raw slurry enters dryer, is dried using hot gas, raw material moisture≤5% out；
(5) it is preheated outside raw material kiln: the raw material after drying preheat outside kiln；
(6) clinkersintering: the raw material after preheating, which enter in chamotte kiln, to be sintered；
(7) clinker cooling: after sintered high temperature chamotte is cooling, Clinker digestion process is sent to.
2. Bayer process red mud according to claim 1 produces aluminium oxide wet laid furnishes dry sintering technique, which is characterized in that
The described Bayer process red mud dehydration using vertical-disk filter, horizontal belt filter, ceramic filter, automatically boxing filter press or
One of vacuum-type drum filter.
3. Bayer process red mud according to claim 1 produces aluminium oxide wet laid furnishes dry sintering technique, which is characterized in that
The Bayer process crystalline alkali dehydration is using ceramic filter, vertical-disk filter, automatically boxing filter press or vacuum drum filtering
One of machine.
4. Bayer process red mud according to claim 1 produces aluminium oxide wet laid furnishes dry sintering technique, which is characterized in that
The raw slurry preparation is ground using tube mill, is sorted by grader or water conservancy cyclone, using raw material
Slurry allotment, is deployed into qualified raw slurry.
5. Bayer process red mud according to claim 1 produces aluminium oxide wet laid furnishes dry sintering technique, which is characterized in that
The drying raw meal uses vertical static baker, and raw slurry is mixed by being pumped into baker with hot-blast stove or grog kiln tail gas
It closes, is dried, exhaust gas temperature≤75 DEG C after drying, raw material discharging moisture content≤5%.
6. Bayer process red mud according to claim 1 produces aluminium oxide wet laid furnishes dry sintering technique, which is characterized in that
The raw material kiln preheats the pre-heating system using mulitistage cyclone composition outside, and preheating heat source, which uses, comes from clinker kiln tail
Hot fume.
7. Bayer process red mud according to claim 1 produces aluminium oxide wet laid furnishes dry sintering technique, which is characterized in that
The clinkersintering uses rotary kiln, and chamotte kiln length is the 30%~70% of conventional wet sintered clinker kiln length.
8. Bayer process red mud according to claim 1 produces aluminium oxide wet laid furnishes dry sintering technique, which is characterized in that
The clinker cooling is using one of single cylinder cooling machine, grate cooler or planetary cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550195.5A CN110028091A (en) | 2018-05-31 | 2018-05-31 | A kind of Bayer process red mud production aluminium oxide wet laid furnishes dry sintering technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550195.5A CN110028091A (en) | 2018-05-31 | 2018-05-31 | A kind of Bayer process red mud production aluminium oxide wet laid furnishes dry sintering technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110028091A true CN110028091A (en) | 2019-07-19 |
Family
ID=67234886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810550195.5A Pending CN110028091A (en) | 2018-05-31 | 2018-05-31 | A kind of Bayer process red mud production aluminium oxide wet laid furnishes dry sintering technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110028091A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410446A (en) * | 2020-04-26 | 2020-07-14 | 渑池东能科技有限公司 | Method for recycling aluminum industry solid waste by using rotary kiln and production system |
| CN111484222A (en) * | 2020-04-15 | 2020-08-04 | 重庆市南川区先锋氧化铝有限公司 | Bayer process red mud concentration process suitable for sintering process production |
| CN112010332A (en) * | 2020-09-08 | 2020-12-01 | 南京凯盛国际工程有限公司 | Aluminum oxide clinker preparation system and process flow thereof |
| AU2022100082B4 (en) * | 2019-11-26 | 2023-06-22 | Metso Metals Oy | Optimized semi-dry process for sintering of aluminosilicates in the production of alumina |
| CN118491185A (en) * | 2024-07-19 | 2024-08-16 | 山西华兴铝业有限公司 | Red mud separator is used in aluminium oxide production |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107892A (en) * | 2009-12-23 | 2011-06-29 | 中国铝业股份有限公司 | Sulfur discharging method for using high-sulfur bauxite ore in mixed combination method |
| CN102372297A (en) * | 2010-08-26 | 2012-03-14 | 沈阳铝镁设计研究院有限公司 | Method for sintering dry feed in process of alumina production by series process |
| CN104925841A (en) * | 2014-03-19 | 2015-09-23 | 沈阳铝镁设计研究院有限公司 | Low-moisture-content red mud slurry conveying method and preparation system |
| CN108083294A (en) * | 2018-02-12 | 2018-05-29 | 沈阳鑫博工业技术股份有限公司 | A kind of device and method that aluminium oxide and sodium oxide molybdena are extracted from red mud |
-
2018
- 2018-05-31 CN CN201810550195.5A patent/CN110028091A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107892A (en) * | 2009-12-23 | 2011-06-29 | 中国铝业股份有限公司 | Sulfur discharging method for using high-sulfur bauxite ore in mixed combination method |
| CN102372297A (en) * | 2010-08-26 | 2012-03-14 | 沈阳铝镁设计研究院有限公司 | Method for sintering dry feed in process of alumina production by series process |
| CN104925841A (en) * | 2014-03-19 | 2015-09-23 | 沈阳铝镁设计研究院有限公司 | Low-moisture-content red mud slurry conveying method and preparation system |
| CN108083294A (en) * | 2018-02-12 | 2018-05-29 | 沈阳鑫博工业技术股份有限公司 | A kind of device and method that aluminium oxide and sodium oxide molybdena are extracted from red mud |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2022100082B4 (en) * | 2019-11-26 | 2023-06-22 | Metso Metals Oy | Optimized semi-dry process for sintering of aluminosilicates in the production of alumina |
| CN111484222A (en) * | 2020-04-15 | 2020-08-04 | 重庆市南川区先锋氧化铝有限公司 | Bayer process red mud concentration process suitable for sintering process production |
| CN111484222B (en) * | 2020-04-15 | 2022-09-02 | 重庆市九龙万博新材料科技有限公司 | Bayer process red mud concentration process suitable for sintering process production |
| CN111410446A (en) * | 2020-04-26 | 2020-07-14 | 渑池东能科技有限公司 | Method for recycling aluminum industry solid waste by using rotary kiln and production system |
| CN111410446B (en) * | 2020-04-26 | 2023-06-30 | 渑池东能科技有限公司 | Method and production system for recycling solid waste in aluminum industry by rotary kiln |
| CN112010332A (en) * | 2020-09-08 | 2020-12-01 | 南京凯盛国际工程有限公司 | Aluminum oxide clinker preparation system and process flow thereof |
| CN118491185A (en) * | 2024-07-19 | 2024-08-16 | 山西华兴铝业有限公司 | Red mud separator is used in aluminium oxide production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110028091A (en) | A kind of Bayer process red mud production aluminium oxide wet laid furnishes dry sintering technique | |
| CN107324670B (en) | Device for producing high-activity magnesium oxide by utilizing magnesite tailings | |
| CN105540627A (en) | Preparation method for clinker of alumina produced by sintering process | |
| CN102372297B (en) | Method for sintering dry feed in process of alumina production by series process | |
| CN108503247B (en) | Method and equipment for producing high-temperature gypsum from industrial byproduct gypsum | |
| CN104692435A (en) | Suspension roasting device and technology for producing multiform aluminum oxide | |
| CN101811839B (en) | Method for producing cement clinker by calcining chalk | |
| CN112551925B (en) | Device and method for comprehensively utilizing gypsum raw material | |
| CN102976644B (en) | Moderate-heat silicate cement clinker and production method thereof | |
| CN102942314A (en) | Oil well cement and production method thereof | |
| CN103342371A (en) | Process and device for whitening calcined black talc | |
| CN104843751A (en) | Bauxite activation calcination low-temperature digestion system and activation, calcination and digestion method | |
| CN110220386A (en) | A kind of kaolin powder pre-heating system and kaolin powder calcination system and method for calcinating comprising it | |
| CN113028827A (en) | Operation method of spodumene calcination conversion device | |
| CN101746791A (en) | Dry sintering method for aluminum oxide clinker | |
| CN112010332A (en) | Aluminum oxide clinker preparation system and process flow thereof | |
| CN108083816A (en) | A kind of preparation method of high bauxite clinker powder | |
| WO2024060552A1 (en) | Method for preparing semi-hydrated gypsum powder by dynamically roasting purified ardealite | |
| CN210419773U (en) | Equipment system for preparing anhydrite powder from industrial waste residue phosphogypsum in large scale | |
| CN101913892B (en) | Method for producing homogenized alumina | |
| CN104609451B (en) | Process for preparing aluminum oxide by virtue of dry-sintering method | |
| CN214792497U (en) | Spodumene calcining and converting device | |
| CN211770329U (en) | System for use magnesium hydrate as raw materials production fused magnesia | |
| CN104098280A (en) | Low-grade magnesite light roasting technology | |
| CN113955959A (en) | Device and method for producing anhydrous gypsum by using fresh phosphogypsum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190719 |