CN103755312A - Coal gangue brick prepared from aluminum-electrolytic cell waste thermal-insulation materials and preparation method thereof - Google Patents
Coal gangue brick prepared from aluminum-electrolytic cell waste thermal-insulation materials and preparation method thereof Download PDFInfo
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- CN103755312A CN103755312A CN201410034666.9A CN201410034666A CN103755312A CN 103755312 A CN103755312 A CN 103755312A CN 201410034666 A CN201410034666 A CN 201410034666A CN 103755312 A CN103755312 A CN 103755312A
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Abstract
The invention discloses a coal gangue brick prepared from aluminum-electrolytic cell waste thermal-insulation materials and a preparation method thereof. The coal gangue brick prepared from aluminum-electrolytic cell waste thermal-insulation materials is prepared from waste thermal-insulation materials, clay and coal gangue. The preparation method comprises the steps of material preparation, screening, magnetic separation, mixing and aging, molding, dehydrating, firing and flue gas treatment. The preparation method specifically comprises the following steps: proportionally mixing the raw materials, crushing, screening to obtain aggregate and powder, recycling aluminum from the powder by a ball mill, carrying out magnetic separation on the powder subjected to aluminum recycling and the aggregate to recycle iron, adding water accounting for 10-15 wt%, evenly mixing, aging for 4-8 days, carrying out extrusion molding, dehydrating until the water content is 1-4%, keeping the temperature at 800-850 DEG C for 4-8 hours, cooling to obtain the target substance, and carrying out recovery processing on the flue gas. Various resources are totally recycled, and the flue gas is collected, purified and subjected to recovery processing; and by using proper amounts of fluorine-containing waste of electrolytic production of aluminum, the firing temperature of the coal gangue is lowered to 850 DEG C below from 1050 DEG C in the traditional process, thereby greatly lowering the energy consumption and saving the clay.
Description
Technical field
The invention belongs to waste resource reutilization technology field, be specifically related to a kind of colliery wastes brick that utilizes the production of aluminum cell waste lagging material and preparation method thereof.
Background technology
At present, the thermal insulation layer of domestic aluminium cell from outside to inside major part is calcium silicate board, light-weight insulating brick, refractory brick and the dry type impervious bed of material, in aluminium cell use procedure, ionogen can constantly corrode cathode block and thermal insulation layer, make electrolyzer distortion damaged, the thermal insulation layer of existing electrolyzer is calcium silicate board, light-weight insulating brick, the dry type impervious bed of material from outside to inside, and light-weight insulating brick major ingredient is SiO
2, account for brick heavy more than 80%, brickwork joint Al
2o
3powder is filled, and refractory brick and Impervious Materials major ingredient are 55%Al
2o
3and 40%SiO
2.While using the electrolytic cell overhaul after several years, the antiseepage bed of material can be corroded and generate vitreous state nepheline or albite by ionogen, and has partially fluorinated salt (CaF
2, NaF, MgF
2, LiF
2, Na
3alF
6), the composition such as aluminium, iron, belong to Hazardous wastes, its generation increases along with the increase of electrolytic aluminum output.The main still Al of overall composition in waste and old lagging material
2o
3and SiO
2, similar to the main composition of clay, because not containing in conjunction with water, plasticity is poor.The major ingredient of colliery wastes brick is to be less than 70% SiO in the market
2with 10 ~ 25 Al
2o
3, Al
2o
3the intensity of the more brick of content is also higher, separately has 2 ~ 8% Fe
2o
3with a small amount of calcium, magnesium oxide.Domestic aluminium manufacturer is mainly landfill to the treatment process of above-mentioned aluminum cell waste lagging material now, and too much landfill can be polluted soil around, causes secondary pollution, and can affect the use in soil.
Along with society is constantly progressive, people also more and more pay attention to the pollution in control soil, add the minimizing of global cultivated area, protect farmland extremely urgent, have proposed to ban use of solid clay brick.For addressing the above problem, a kind of develop environmental protection treatment aluminum cell waste lagging material method is very important.
Summary of the invention
The first object of the present invention is to provide a kind of colliery wastes brick that utilizes aluminum cell waste lagging material to produce; The second object is to provide the preparation method of the described colliery wastes brick that utilizes the production of aluminum cell waste lagging material.
The first object of the present invention is achieved in that described colliery wastes brick raw material is aluminum cell waste lagging material, clay and coal gangue.
The second object of the present invention be achieved in that comprise get the raw materials ready, screening, magnetic separation, batch mixing ageing, moulding, drying and dehydrating, fire, flue gas treatment step, specifically comprise:
A, get the raw materials ready: raw material aluminum cell waste lagging material, clay and gangue brick are carried out to mixing for standby use by proportioning;
B, screening: by the raw material after mixing carry out fragmentation, screening obtains aggregate and powder;
C, magnetic separation: powder all carries out magnetic separation to reclaim iron with aggregate after ball mill reclaims aluminium;
D, batch mixing ageing: add the water of weight 10 ~ 15% to enter that mixer mixes the aggregate after magnetic separation and powder and ageing 4 ~ 8 days;
E, moulding: the batch mixing after ageing is obtained to adobe through extrusion molding;
F, drying and dehydrating: brick bat drying is dewatered to water content 1 ~ 4%;
G, fire: the adobe after drying and dehydrating is sent into tunnel furnace, at 800 ~ 850 ℃, be incubated 4 ~ 8h after the cooling target compound that obtains;
H, flue gas processing: the flue gas that sintering is produced recycles.
It is raw material that the present invention adopts aluminum cell waste lagging material refuse in need of immediate treatment; replace the clay needing protection; various resources are all recycled; flue gas is carried out to collection and purification recycling; when making resource circulation utilization and protected environment; and due to the fluoride waste of appropriate Aluminium Electrolysis, the firing temperature that makes coal gangue drops to below 850 ℃ from traditional 1050 ℃, greatly reduces energy consumption and has saved clay.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated, but never in any form the present invention is limited, and any conversion or the replacement based on training centre of the present invention, done, all belong to protection scope of the present invention.
The colliery wastes brick that utilizes aluminum cell waste lagging material to produce of the present invention, its raw material is aluminum cell waste lagging material, clay and coal gangue.
The weight ratio of described aluminum cell waste lagging material, clay and coal gangue is 2 ~ 4:6 ~ 8:35 ~ 45.
The preparation method of colliery wastes brick who utilizes aluminum cell waste lagging material to produce of the present invention, comprise get the raw materials ready, screening, magnetic separation, batch mixing ageing, moulding, drying and dehydrating, fire, flue gas treatment step, specifically comprise:
A, get the raw materials ready: raw material aluminum cell waste lagging material, clay and gangue brick are carried out to mixing for standby use by proportioning;
B, screening: by the raw material after mixing carry out fragmentation, screening obtains aggregate and powder;
C, magnetic separation: powder all carries out magnetic separation to reclaim iron with aggregate after ball mill reclaims aluminium;
D, batch mixing ageing: add the water of weight 10 ~ 15% to enter that mixer mixes the aggregate after magnetic separation and powder and ageing 4 ~ 8 days;
E, moulding: the batch mixing after ageing is obtained to adobe through extrusion molding;
F, drying and dehydrating: brick bat drying is dewatered to water content 1 ~ 4%;
G, fire: the adobe after drying and dehydrating is sent into tunnel furnace, at 800 ~ 850 ℃, be incubated 4 ~ 8h after the cooling target compound that obtains;
H, flue gas processing: the flue gas that sintering is produced recycles.
Described be broken for hammer crushing, Hubei Province formula fragmentation, ball mill crushing, to rolling several in fragmentation.
Described aggregate diameter is 1 ~ 3mm, and described powder diameter is below 0.5mm.
The batch mixing weight proportion of described aggregate and powder is 2 ~ 4:6 ~ 8.
Described is powder to be entered to grinding of ball grinder below 100 orders through ball mill recovery aluminium, and the metallic aluminium that can not grind is selected recovery.
Described drying and dehydrating is seasoning, steam drying, the stove tail gas one in dry.
The temperature of described drying and dehydrating is below 125 ℃.
Described flue gas processing be adopt secondary spraying absorption tower absorb, then after calcium salt primary treatment and polymer alumina secondary treatment qualified discharge.
The production method of utilizing aluminum electrolysis waste lagging material to produce insulating brick and to reclaim carbon is that waste and old lagging material that aluminium cell overhaul is produced, the outward clay got and coal gangue mix in the ratio of 3:7:40 and carry out fragmentation, screening, select the particle of 1 ~ 2mm as aggregate, be less than the powder of 0.5mm as stopping composition, broken material is selected metallic iron through magnetic separation, aggregate enters feed bin, the material sifting out enters grinding of ball grinder together below 100 orders, and the metallic aluminium that can not grind selects recovery, aggregate, powder are mixed into feed bin in the ratio of 3:7.Compound adds water in 10 ~ 15% ratios of gross weight, after mixing, enters ageing warehouse, within 4 ~ 8 days, takes out and is pressed into the adobe of client's desired shape with full two-stage vacuum extrusion machine and corresponding mould afterwards, at 125 ℃, be dried below.Brick bat drying when water ratio is below 4%, enters tunnel furnace, by the heat-up rate of 60 ℃/h, is raised to 850 ℃, at 800 ~ 850 ℃ of temperature, is incubated 4 ~ 8 hours, cooling getting product after kiln discharge, and end properties reaches the requirement of GB5101 ~ 2003 colliery wastes brick.
The flue gas that tunnel furnace produces contains a small amount of fluorine, adopts first secondary spraying absorption tower to absorb, the flow process of then discharging through activated alumina adsorption tower during processing.The waste water reclaiming in absorption tower is because containing a small amount of fluorine, need to be after calcium salt (carbide slag or lime) primary treatment and polymerize aluminum chloride secondary treatment qualified discharge, the Calcium Fluoride (Fluorspan) that wastewater treatment is collected and aluminum fluoride can be used as the raw material that other fluoride salts are produced.
It is raw material that technique of the present invention is used refuse in need of immediate treatment to replace the clay needing protection, and burns till at a lower temperature, has reduced energy consumption, and various resources are all recycled, the whole collection and purification processing of gas, and environmental benefit is obvious.
Embodiment 1
Raw material aluminum cell waste lagging material 100Kg, clay 250Kg and coal gangue 600Kg are mixed, carry out E Shi with to rolling fragmentation, through trommel screen screening, obtain the aggregate of 1 ~ 3mm and the powder that is less than 0.5mm of 350Kg of 600Kg, powder is reclaimed and obtains 0.9Kg aluminium through ball mill, magnetic separation is reclaimed and is obtained 0.5Kg iron, and aggregate is reclaimed and obtains 1.1Kg iron after magnetic separator magnetic separation.Add the water of 100Kg to enter mixer the 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue and mix also ageing 4 ~ 8 days, through extrusion molding, obtain 240 × 240 × 115mm adobe, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, the cooling target compound insulating brick that obtains be incubated 4 ~ 8h at 800 ~ 850 ℃ after, the first secondary spraying of the flue gas absorption tower producing absorbs, then through the discharge of activated alumina adsorption tower.
Insulating brick assay is: solid brick (brick that is less than 25% without hole or hole) Morse intensity is greater than MU15.
Embodiment 2
Raw material aluminum cell waste lagging material 100Kg, clay 220Kg and coal gangue 600Kg are mixed, carry out E Shi with to rolling fragmentation, through trommel screen screening, obtain the aggregate of 1 ~ 3mm and the powder that is less than 0.5mm of 460Kg of 460Kg, powder is reclaimed and obtains 0.7Kg aluminium through ball mill, magnetic separation is reclaimed and is obtained 0.4Kg iron, and aggregate is reclaimed and obtains 0.6Kg iron after magnetic separator magnetic separation.Add the water of 100Kg to enter mixer the 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue and mix also ageing 4 ~ 8 days, through extrusion molding, obtain 240 × 240 × 115mm adobe, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, the cooling target compound insulating brick that obtains be incubated 4 ~ 8h at 800 ~ 850 ℃ after, the first secondary spraying of the flue gas absorption tower producing absorbs, then through the discharge of activated alumina adsorption tower.
Insulating brick assay is: solid brick (brick that is less than 25% without hole or hole) Morse intensity is greater than MU15.
Embodiment 3
Raw material aluminum cell waste lagging material 100Kg, clay 220Kg and coal gangue 600Kg are mixed, carry out E Shi with to rolling fragmentation, through trommel screen screening, obtain the aggregate of 1 ~ 3mm and the powder that is less than 0.5mm of 460Kg of 460Kg, powder is reclaimed and obtains 0.7Kg aluminium through ball mill, magnetic separation is reclaimed and is obtained 0.4Kg iron, and aggregate is reclaimed and obtains 0.6Kg iron after magnetic separator magnetic separation.Add the water of 100Kg to enter mixer the 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue and mix also ageing 4 ~ 8 days, through extrusion molding, obtain 240 × 240 × 115mm adobe, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, the cooling target compound insulating brick that obtains be incubated 4 ~ 8h at 800 ~ 850 ℃ after, the first secondary spraying of the flue gas absorption tower producing absorbs, then through the discharge of activated alumina adsorption tower.
Insulating brick assay is: solid brick (brick that is less than 25% without hole or hole) Morse intensity is greater than MU15.
Embodiment 4
Raw material aluminum cell waste lagging material 100Kg, clay 220Kg and coal gangue 600Kg are mixed, carry out E Shi with to rolling fragmentation, through trommel screen screening, obtain the aggregate of 1 ~ 3mm and the powder that is less than 0.5mm of 360Kg of 560Kg, powder is reclaimed and obtains 0.9Kg aluminium through ball mill, magnetic separation is reclaimed and is obtained 0.4Kg iron, and aggregate is reclaimed and obtains 1.2Kg iron after magnetic separator magnetic separation.Add the water of 100Kg to enter mixer the 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue and mix also ageing 4 ~ 8 days, through extrusion molding, obtain 240 × 240 × 115mm adobe, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, the cooling target compound insulating brick that obtains be incubated 4 ~ 8h at 800 ~ 850 ℃ after, the first secondary spraying of the flue gas absorption tower producing absorbs, then through the discharge of activated alumina adsorption tower.
Insulating brick assay is: solid brick (brick that is less than 25% without hole or hole) Morse intensity is greater than MU15.
Embodiment 5
Raw material aluminum cell waste lagging material 100Kg, clay 220Kg and coal gangue 600Kg are mixed, carry out E Shi with to rolling fragmentation, through trommel screen screening, obtain the aggregate of 1 ~ 3mm and the powder that is less than 0.5mm of 620Kg of 300Kg, powder is reclaimed and obtains 0.9Kg aluminium through ball mill, magnetic separation is reclaimed and is obtained 0.4Kg iron, and aggregate is reclaimed and obtains 0.5Kg iron after magnetic separator magnetic separation.Add the water of 100Kg to enter mixer the 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue and mix also ageing 4 ~ 8 days, through extrusion molding, obtain 240 × 240 × 115mm adobe, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, the cooling target compound insulating brick that obtains be incubated 4 ~ 8h at 800 ~ 850 ℃ after, the first secondary spraying of the flue gas absorption tower producing absorbs, then through the discharge of activated alumina adsorption tower.
Insulating brick assay is: solid brick (brick that is less than 25% without hole or hole) Morse intensity is greater than MU15.
Embodiment 6
Raw material aluminum cell waste lagging material 100Kg, clay 220Kg and coal gangue 600Kg are mixed, carry out E Shi with to rolling fragmentation, through trommel screen screening, obtain the aggregate of 1 ~ 3mm and the powder that is less than 0.5mm of 260Kg of 660Kg, powder is reclaimed and obtains 1.0Kg aluminium through ball mill, magnetic separation is reclaimed and is obtained 0.4Kg iron, and aggregate is reclaimed and obtains 0.7Kg iron after magnetic separator magnetic separation.Add the water of 100Kg to enter mixer the 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue and mix also ageing 4 ~ 8 days, through extrusion molding, obtain 240 × 240 × 115mm adobe, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, the cooling target compound insulating brick that obtains be incubated 4 ~ 8h at 800 ~ 850 ℃ after, the first secondary spraying of the flue gas absorption tower producing absorbs, then through the discharge of activated alumina adsorption tower.
Insulating brick assay is: solid brick (brick that is less than 25% without hole or hole) Morse intensity is greater than MU15.
Claims (10)
1. a colliery wastes brick that utilizes aluminum cell waste lagging material to produce, is characterized in that described colliery wastes brick raw material is aluminum cell waste lagging material, clay and coal gangue.
2. the colliery wastes brick that utilizes aluminum cell waste lagging material to produce according to claim 1, is characterized in that the weight ratio of described aluminum cell waste lagging material, clay and coal gangue is 2 ~ 4:6 ~ 8:35 ~ 45.
3. the preparation method of the colliery wastes brick that utilizes the production of aluminum cell waste lagging material described in a claim 1 or 2, it is characterized in that comprising get the raw materials ready, screening, magnetic separation, batch mixing ageing, moulding, drying and dehydrating, fire, flue gas treatment step, specifically comprise:
A, get the raw materials ready: raw material aluminum cell waste lagging material, clay and gangue brick are carried out to mixing for standby use by proportioning;
B, screening: by the raw material after mixing carry out fragmentation, screening obtains aggregate and powder;
C, magnetic separation: powder all carries out magnetic separation to reclaim iron with aggregate after ball mill reclaims aluminium;
D, batch mixing ageing: add the water of weight 10 ~ 15% to enter that mixer mixes the aggregate after magnetic separation and powder and ageing 4 ~ 8 days;
E, moulding: the batch mixing after ageing is obtained to adobe through extrusion molding;
F, drying and dehydrating: brick bat drying is dewatered to water content 1 ~ 4%;
G, fire: the adobe after drying and dehydrating is sent into tunnel furnace, at 800 ~ 850 ℃, be incubated 4 ~ 8h after the cooling target compound that obtains;
H, flue gas processing: the flue gas that sintering is produced recycles.
4. the preparation method of colliery wastes brick who utilizes aluminum cell waste lagging material to produce according to claim 3, is characterized in that described being broken for hammer crushing, Hubei Province formula fragmentation, ball mill crushing, to rolling several in fragmentation.
5. the preparation method of the colliery wastes brick that utilizes the production of aluminum cell waste lagging material according to claim 3, is characterized in that described aggregate diameter is 1 ~ 3mm, and described powder diameter is below 0.5mm.
6. according to the preparation method of the colliery wastes brick that utilizes the production of aluminum cell waste lagging material described in claim 3 or 5, it is characterized in that described aggregate and the batch mixing weight proportion of powder are 2 ~ 4:6 ~ 8.
7. the preparation method of the colliery wastes brick that utilizes the production of aluminum cell waste lagging material according to claim 3, described in it is characterized in that is powder to be entered to grinding of ball grinder below 100 orders through ball mill recovery aluminium, and the metallic aluminium that can not grind is selected recovery.
8. the preparation method of colliery wastes brick who utilizes aluminum cell waste lagging material to produce according to claim 3, is characterized in that described drying and dehydrating is seasoning, steam drying, the stove tail gas one in dry.
9. according to the preparation method of the colliery wastes brick that utilizes the production of aluminum cell waste lagging material described in claim 3 or 8, it is characterized in that the temperature of described drying and dehydrating is below 125 ℃.
10. the preparation method of the colliery wastes brick that utilizes the production of aluminum cell waste lagging material according to claim 3, it is characterized in that described flue gas processing is to adopt secondary spraying absorption tower to absorb, then after calcium salt primary treatment and polymer alumina secondary treatment qualified discharge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410034666.9A CN103755312B (en) | 2014-01-25 | 2014-01-25 | Coal gangue brick prepared from aluminum-electrolytic cell waste thermal-insulation materials and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410034666.9A CN103755312B (en) | 2014-01-25 | 2014-01-25 | Coal gangue brick prepared from aluminum-electrolytic cell waste thermal-insulation materials and preparation method thereof |
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| CN103755312A true CN103755312A (en) | 2014-04-30 |
| CN103755312B CN103755312B (en) | 2015-06-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105503150A (en) * | 2015-12-08 | 2016-04-20 | 北京京碧蓝环保科技有限公司 | Brick burning kiln cooperated harmless disposal method for waste aluminum electrolysis bath liners |
| CN109174336A (en) * | 2018-08-09 | 2019-01-11 | 芜湖市昌瑞金属粉末有限公司 | Fluid circulation system is used in a kind of production of metal powder |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101357367A (en) * | 2008-09-19 | 2009-02-04 | 昆明理工大学 | Method for processing waste cell-lining of aluminum cell using coal slack |
| CN102059736A (en) * | 2010-12-03 | 2011-05-18 | 伊川龙海科技实业有限公司 | Method for producing insulating bricks by utilizing aluminum-electrolyzed waste refractory materials |
| CN103524108A (en) * | 2012-07-05 | 2014-01-22 | 武安市文祥合金制造有限公司 | Raw material ratio for producing energy-saving bricks by coal gangue as well as preparation method of energy-saving bricks |
-
2014
- 2014-01-25 CN CN201410034666.9A patent/CN103755312B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101357367A (en) * | 2008-09-19 | 2009-02-04 | 昆明理工大学 | Method for processing waste cell-lining of aluminum cell using coal slack |
| CN102059736A (en) * | 2010-12-03 | 2011-05-18 | 伊川龙海科技实业有限公司 | Method for producing insulating bricks by utilizing aluminum-electrolyzed waste refractory materials |
| CN103524108A (en) * | 2012-07-05 | 2014-01-22 | 武安市文祥合金制造有限公司 | Raw material ratio for producing energy-saving bricks by coal gangue as well as preparation method of energy-saving bricks |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105503150A (en) * | 2015-12-08 | 2016-04-20 | 北京京碧蓝环保科技有限公司 | Brick burning kiln cooperated harmless disposal method for waste aluminum electrolysis bath liners |
| CN109174336A (en) * | 2018-08-09 | 2019-01-11 | 芜湖市昌瑞金属粉末有限公司 | Fluid circulation system is used in a kind of production of metal powder |
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| CN103755312B (en) | 2015-06-24 |
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