CN105710105A - Integrated preparing method for separating iron through red mud and foaming light wall material through tailings base of red mud - Google Patents
Integrated preparing method for separating iron through red mud and foaming light wall material through tailings base of red mud Download PDFInfo
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- CN105710105A CN105710105A CN201610019848.8A CN201610019848A CN105710105A CN 105710105 A CN105710105 A CN 105710105A CN 201610019848 A CN201610019848 A CN 201610019848A CN 105710105 A CN105710105 A CN 105710105A
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- Prior art keywords
- red mud
- parts
- light
- tailings
- wall material
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/25—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
Abstract
The invention discloses an integrated preparing method for separating iron through red mud and foaming a light wall material through a tailings base of the red mud and belongs to the field of industrial solid waste comprehensive utilization and novel ecological construction materials. The method specifically includes the steps that firstly, red mud is used for separating the iron; secondly, slag and liquid separation is conducted on the red mud; and thirdly, light wall material slurry is prepared and formed. Due to the fact that coal gangue, limestone and coke dust are mixed into the red mud, then magnetizing roasting is conducted, hematite, limonite and the like which do not have magnetism in the red mud are transformed into metallic iron and Fe3O4 which have magnetism. Meanwhile, due to the fact that the coal gangue and the limestone are led into the red mud, phases such as C3S and C2S which have gelatinization activity are also formed in the roasting process, and the coagulation characteristic of cement is achieved. By means of the integrated preparing method, ecological environmental protection is achieved, the preparing technology is simple, existing equipment can be used for production, cost is effectively reduced, fully-quantitative and zero-emission comprehensive utilization of the red mud is achieved, and great practical value and wide application prospects are achieved.
Description
Technical field
The invention belongs to industrial solid castoff comprehensive utilization and new ecological construction Material Field, be specifically related to a kind of red mud and select ferrum and the integral preparation method of tailings base foamed light walling thereof.
Background technology
The generation amount of China's red mud in 2005 is 10,000,000 tons, within 2010, is 30,000,000 tons, it is contemplated that within 2015, generation amount will reach 35,000,000 tons, and accumulation volume of cargo in storage is up to more than 300,000,000 ton.The fast development of the related industry such as electrolytic aluminium, aluminium oxide, causes that red mud burden continues to strengthen, the severe ecological problem such as cause that body of groundwater, soil pollution, haze, radioactivity exceed standard.Regrettably; the comprehensive utilization ratio of red mud in 2010 is only the 4% of generation amount then; " 12 " end i.e. utilization rate target of 2015 is to reach 20%; utilization rate is low; volume of cargo in storage is big; the difficulty realizing target is high, is badly in need of breaking through the technical bottleneck that red mud green high-efficient higher value application, especially scale utilize.
Along with petering out of natural resources, the recycling of industrial solid castoff resource has become a big theme of current Ecological Civilization Construction.The thoroughly solution that red mud harmless processed and comprehensively utilized this global problem is extremely urgent.The country that countries in the world especially bauxite resource enriches all has put into a large amount of financial resources, manpower etc. and has carried out the comprehensive utilizating research of red mud, but it not that technology is immature, unstable product quality, be exactly in the product of existing mature technology the amount of dissolving of red mud very low, cause that the practical efficiency of current red mud is not high, utilization is also nowhere near compared with generation amount, is difficult to thoroughly eliminate environmental pollution and the potential safety hazard that the red mud that pile up like a mountain causes.Therefore, carrying out scale full dose of dissolving utilizes the new technique of red mud significant.
At present, the comprehensive utilizating research of red mud mainly extracts valuable metal, for ecological restoration material, engineering plastics filler and produce the aspects such as fired brick, but the problem being also faced with sternness, as extracted, valuable metal cost is high, can cause secondary pollution for environment remediation, produce fired brick there is accumulation of salt in the surface soil phenomenon etc..The iron-bearing mineral phase contents such as bloodstone in Bayer process red mud, limonite are generally above 30%, but current red mud selects ferrum to be in the laboratory research stage more, and the many employings of tailings produced are stored up or prepare construction material after drying process, cause the mineral constituent with gelation activity formed at red mud roasting magnetization phase to lose activity.
Summary of the invention
It is an object of the invention to provide a kind of red mud and select ferrum and the integral preparation method of tailings base foamed light walling thereof.
Based on above-mentioned purpose, this invention takes following technical scheme:
A kind of red mud selects ferrum and the integral preparation method of tailings base foamed light walling thereof, comprises the following steps:
(1) red mud selects ferrum: weigh red mud 50 ~ 70 parts, gangue 10 ~ 30 parts, limestone 5 ~ 30 parts, coke blacking 10 ~ 20 parts by butt weight portion, mixing；Pelletize, granularity is 5 ~ 30mm, dry；Being incubated 2 ~ 4h at 1050 ~ 1200 DEG C, after naturally cooling to room temperature, grinding is to 200 orders；Add water stirring, makes the slip of concentration 20wt% ~ 40wt%；Slip is sent into magnetic separator and selects ferrum, magnetic induction 1600 ~ 2800Gs；
(2) red mud slag-liquid separation: the red mud tailings slurry by filtration after selecting ferrum, the red mud tailings after separation is delivered to blender, and filtrate is sent into foaming machine and foamed；
(3) molding of light-weight wall material: cement, flyash, aglite and water are sequentially added into blender, is uniformly mixed so as to obtain mixed slurry with the red mud tailings of blender, then under agitation adds the foam foamed, and prepares light-weight wall material slip；By in the light-weight wall material slip casting for preparing to mould, it is shaped to light cellular partition board, light block or light-weight insulating brick.
In described step (2), by butt parts by weight: red mud tailings 20 ~ 50 parts, cement 8 ~ 20 parts, 15 ~ 40 parts of flyash, aglite 15 ~ 30 parts and 15 ~ 50 parts of water；The volume ratio of foam and mixture slurry is (0.2 ~ 0.5) 1.
A kind of red mud of the present invention selects ferrum and the integral preparation method of tailings base foamed light walling thereof, by carrying out magnetizing roast after allocating gangue, limestone, coke blacking in red mud into, both it was changed into metallic iron and the Fe of magnetic by red mud does not have magnetic bloodstone, limonite etc.3O4, meanwhile, the introducing of gangue and limestone, roasting process defines again the C with gelation activity3S、C2The thing phases such as S, have possessed the congealing property of cement, select the composite a certain amount of cement of ferrum tailings, flyash, aglite etc. for preparing novel light building material；Select ferrum filtrate for preparing magnetic separation slip and the foam of foamed light building materials.Selecting ferrum to preparing light building material from red mud, body material adopts the industrial solid castoffs such as red mud, flyash, gangue, ecological, environmental protective；Preparation technology is simple, and available existing weaponry and equipment produces, and effectively reduces cost, and achieves the full dose of red mud, zero-emission comprehensive utilization, has great practical value and be widely applied prospect.
Accompanying drawing explanation
Fig. 1 is the technical process block diagram of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme is described in further detail, but protection scope of the present invention is not limited thereto.
Embodiment 1:
A kind of red mud selects ferrum and the integral preparation method of tailings base foamed light walling thereof, is embodied as step as follows:
(1) red mud selects ferrum
Weigh red mud 50 parts, gangue 30 parts, limestone 10 parts, coke blacking 10 parts by butt weight portion, mixer carries out sufficient Homogeneous phase mixing；Add water, pelletize, granularity is 5 ~ 30mm, dry；1050 DEG C of roasting 2h, naturally cool to room temperature, and grinding is to 200 orders；Add water stirring preparation 20wt% slip；The slip prepared is sent into magnetic separator and selects ferrum, magnetic induction 1600Gs.
(2) red mud slag-liquid separation
Red mud tailings slurry by filtration after calcining magnetic separation, the red mud tailings after filtration delivers to blender, and filtrate imports reservoir reuse, and a part is sent into foaming machine and foamed, and a part is starched for preparing the new iron charge that selects.
(3) light-weight wall material Pulp preparation and molding
Preparation light-weight wall material slip, cement, flyash, aglite and water are sequentially added into blender, it is uniformly mixed so as to obtain mixture slurry with the red mud tailings of blender, then under agitation add the foam foamed, prepare light-weight wall material slip, wherein, by butt parts by weight: red mud tailings 20 parts, cement 15 parts, 20 parts of flyash, aglite (use lytag in the present embodiment, particle diameter 5-16mm, bulk density 730Kg/m3) 15 parts, 30 parts of water, the volume ratio 0.2 1 of foam and mixture slurry；By in the light-weight wall material slip casting for preparing to mould, it is shaped to light cellular partition board, through steam curing 8h, piling.
After testing, magnetic concentrate kind total iron content reaches 86.5%, and the response rate reaches 82.4%.The solid light partition plate surface density that thickness of slab is 90mm of preparation is 88.5kg/m2, comprcssive strength 27MPa, rupture strength 4.3MPa, coefficient of softing 0.92, in radioactivity Outreach services Ira be 0.86, External Exposure Index Ir be 0.93, integrated performance index meets the requirement of standard GB/T/T23451 2009 " light partition board for building ".
Embodiment 2:
A kind of red mud selects ferrum and the integral preparation method of tailings base foamed light walling thereof, is embodied as step as follows:
(1) red mud selects ferrum
Weigh red mud 70 parts, gangue 10 parts, limestone 5 parts, coke blacking 15 parts by butt weight portion, mixer carries out sufficient Homogeneous phase mixing；Add water, pelletize, granularity is 5 ~ 30mm, dry；1200 DEG C of roasting 4h, natural cooling, grinding is to 200 orders；Add water and prepare into 40wt% slip；The slip prepared is sent into magnetic separator and selects ferrum, magnetic induction 2800Gs.
(2) red mud slag-liquid separation
Red mud tailings slurry by filtration after calcining magnetic separation, the red mud tailings after filtration is delivered to blender, and filtrate imports reservoir reuse, and a part is sent into foaming machine and foamed, and a part is starched for preparing the new iron charge that selects.
(3) light-weight wall material Pulp preparation and molding
Preparation light-weight wall material slip, is sequentially added into blender by cement, flyash, aglite and water, is uniformly mixed so as to obtain mixture slurry with the red mud tailings of blender, then under agitation adds the foam foamed, and prepares light-weight wall material slip；Wherein, by butt parts by weight: red mud tailings 50 parts, cement 8 parts, 15 parts of flyash, aglite (use lytag, particle diameter 5-16mm, bulk density 730Kg/m in the present embodiment3) 10 parts, 17 parts of water, the volume ratio 0.5 1 of foam and mixture slurry；By in the light-weight wall material slip casting for preparing to mould, it is shaped to light block, through steam press maintenance 12h, piling.
After testing, magnetic concentrate kind total iron content reaches 89.5%, and the response rate reaches 91.3%.The light block dry density grade B12 of preparation, comprcssive strength reaches 7.3MPa, water absorption rate 17.6%, and heat conductivity is 0.281W/(m K), combination property meets the index request of standard GB/T/T29062 2012 " steam pressure foam concrete brick and building block ".
Claims (3)
1. a red mud selects ferrum method, it is characterised in that comprise the following steps:
Red mud 50 ~ 70 parts, gangue 10 ~ 30 parts, limestone 5 ~ 30 parts, coke blacking 10 ~ 20 parts is weighed, mixing by butt weight portion；Pelletize, granularity is 5 ~ 30mm, dry；Being incubated 2 ~ 4h at 1050 ~ 1200 DEG C, after naturally cooling to room temperature, grinding is to 200 orders；Add water stirring, makes the slip of concentration 20wt% ~ 40wt%；Slip is sent into magnetic separator and selects ferrum, magnetic induction 1600 ~ 2800Gs.
2. red mud described in a claim 1 selects the integral preparation method of the tailings base foamed light walling after ferrum, it is characterised in that comprise the steps:
(1) red mud slag-liquid separation: the red mud tailings slurry by filtration after selecting ferrum, the red mud tailings after separation is delivered to blender, and filtrate is sent into foaming machine and foamed；
(2) molding of light-weight wall material: cement, flyash, aglite and water are sequentially added into blender, is uniformly mixed so as to obtain mixture slurry with the red mud tailings of blender, then under agitation adds the foam foamed, and prepares light-weight wall material slip；By in the light-weight wall material slip casting for preparing to mould, it is shaped to light cellular partition board, light block or light-weight insulating brick.
3. red mud according to claim 2 selects ferrum and the integral preparation method of tailings base foamed light walling thereof, it is characterized in that, in described step (2), by butt parts by weight: red mud tailings 20 ~ 50 parts, cement 8 ~ 20 parts, 15 ~ 40 parts of flyash, aglite 15 ~ 30 parts and 15 ~ 50 parts of water；The volume ratio of foam and mixture slurry is (0.2 ~ 0.5) 1.
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| CN201610019848.8A CN105710105B (en) | 2016-01-13 | 2016-01-13 | A kind of red mud selects the integral preparation method of iron and its tailings base foamed light walling |
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| CN201610019848.8A CN105710105B (en) | 2016-01-13 | 2016-01-13 | A kind of red mud selects the integral preparation method of iron and its tailings base foamed light walling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108751755A (en) * | 2018-06-20 | 2018-11-06 | 贵州遵义亚诚建材有限公司 | A kind of preparation method of lightweight high magnesia limestone calcination clinker |
| CN109160744A (en) * | 2018-10-25 | 2019-01-08 | 青岛盈坤源国际贸易有限公司 | Red mud magnetizing roast utilization system and technique |
| CN111663046A (en) * | 2020-06-30 | 2020-09-15 | 东北大学 | System for recovering iron and aluminum by suspending and co-roasting red mud and coal gangue |
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| US3493327A (en) * | 1967-10-12 | 1970-02-03 | Reynolds Metals Co | Removal of iron from domestic bauxite liquor |
| CN101831520A (en) * | 2010-06-10 | 2010-09-15 | 中国铝业股份有限公司 | Method for producing sponge iron co-production sodium aluminate solution by using Bayer process red mud |
| CN102061350A (en) * | 2011-01-12 | 2011-05-18 | 董亚飞 | Short-process comprehensive red mud utilization method and equipment |
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| CN103074456A (en) * | 2013-01-08 | 2013-05-01 | 中国铝业股份有限公司 | Method for recycling iron from waste red mud in alumina production |
| CN103397128A (en) * | 2013-08-02 | 2013-11-20 | 北京科技大学 | Method used for extracting iron from red mud by drastic reduction and method used for preparing gel material from secondary tailings |
| CN104072069A (en) * | 2014-07-14 | 2014-10-01 | 山东大学 | Baking-free brick using coal gangue and red mud as main materials, and preparation method for baking-free brick |
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2016
- 2016-01-13 CN CN201610019848.8A patent/CN105710105B/en active Active
Patent Citations (7)
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| US3493327A (en) * | 1967-10-12 | 1970-02-03 | Reynolds Metals Co | Removal of iron from domestic bauxite liquor |
| CN101831520A (en) * | 2010-06-10 | 2010-09-15 | 中国铝业股份有限公司 | Method for producing sponge iron co-production sodium aluminate solution by using Bayer process red mud |
| CN102061350A (en) * | 2011-01-12 | 2011-05-18 | 董亚飞 | Short-process comprehensive red mud utilization method and equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108751755A (en) * | 2018-06-20 | 2018-11-06 | 贵州遵义亚诚建材有限公司 | A kind of preparation method of lightweight high magnesia limestone calcination clinker |
| CN109160744A (en) * | 2018-10-25 | 2019-01-08 | 青岛盈坤源国际贸易有限公司 | Red mud magnetizing roast utilization system and technique |
| CN111663046A (en) * | 2020-06-30 | 2020-09-15 | 东北大学 | System for recovering iron and aluminum by suspending and co-roasting red mud and coal gangue |
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| CN105710105B (en) | 2018-01-05 |
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Effective date of registration: 20230825 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 467036 Henan College of urban construction, Xincheng District, Pingdingshan City, Henan Province Patentee before: Henan University of Urban Construction Effective date of registration: 20230825 Address after: No. 47 Chuanxing Village, Chuanxing Village, Laozhangji Township, Huaiyin District, Huai'an City, Jiangsu Province, 223000 Patentee after: Zhu Jinping Patentee after: Jiangsu Hengshengyuan Property Service Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. |