CN103755312B - 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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- CN103755312B CN103755312B CN201410034666.9A CN201410034666A CN103755312B CN 103755312 B CN103755312 B CN 103755312B CN 201410034666 A CN201410034666 A CN 201410034666A CN 103755312 B CN103755312 B CN 103755312B
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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 utilizing aluminum cell waste lagging material to produce 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 constantly can corrode cathode block and thermal insulation layer, electrolyzer is out of shape 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.When using the electrolytic cell overhaul after several years, the antiseepage bed of material can be corroded by ionogen and generate vitreous state nepheline or albite, 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 Bound moisture, plasticity is poor.In the market the major ingredient of colliery wastes brick be less than 70% SiO
2with 10 ~ 25 Al
2o
3, Al
2o
3the intensity of the brick that content is more is also higher, separately has the Fe of 2 ~ 8%
2o
3with a small amount of calcium, magnesium oxide.The treatment process of domestic aluminium manufacturer to above-mentioned aluminum cell waste lagging material is mainly landfill now, and too much landfill can pollute the soil of surrounding, causes secondary pollution, and can affect the use in soil.
Along with society's constantly progress, people also more and more pay attention to the pollution in control soil, add the minimizing of global cultivated area, protect farmland extremely urgent, propose and prohibit the use solid clay brick.For solving the problem, a kind of method developing environmental protection treatment aluminum cell waste lagging material is very important.
Summary of the invention
The first object of the present invention is to provide a kind of colliery wastes brick utilizing aluminum cell waste lagging material to produce; Second object is the preparation method providing the described colliery wastes brick utilizing aluminum cell waste lagging material to produce.
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, sieve, magnetic separation, batch mixing ageing, shaping, drying and dehydrating, fire, fume treatment step, specifically comprise:
A, to get the raw materials ready: raw material aluminum cell waste lagging material, clay and coal gangue are carried out mixing for standby use by proportioning;
B, screening: the raw material after mixing is carried out fragmentation, screening obtains aggregate and powder;
C, magnetic separation: powder reclaims after aluminium through ball mill and aggregate all carries out magnetic separation to reclaim iron;
D, batch mixing ageing: the water aggregate after magnetic separation and powder being added weight 10 ~ 15% enters mixer and mixes also ageing 4 ~ 8 days;
E, shaping: the batch mixing after ageing is obtained adobe through extrusion molding;
F, drying and dehydrating: by brick bat drying dehydration to water content 1 ~ 4%;
G, to fire: tunnel furnace is sent in the adobe after drying and dehydrating, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound;
H, fume treatment: the flue gas that sintering produces is recycled.
The present invention adopts aluminum cell waste lagging material refuse in need of immediate treatment to be raw material; replace the clay needing protection; various resource is all recycled; collection and purification recycling is carried out to flue gas; environment is protected while making resource circulation utilization; and due to the fluoride waste of appropriate Aluminium Electrolysis, make the firing temperature of coal gangue drop to less than 850 DEG C from traditional 1050 DEG C, greatly reduce energy consumption and saved clay.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated, but limited the present invention never in any form, and any conversion done based on training centre of the present invention or replacement, all belong to protection scope of the present invention.
The colliery wastes brick utilizing 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 the colliery wastes brick utilizing aluminum cell waste lagging material to produce of the present invention, comprise get the raw materials ready, sieve, magnetic separation, batch mixing ageing, shaping, drying and dehydrating, fire, fume treatment step, specifically comprise:
A, to get the raw materials ready: raw material aluminum cell waste lagging material, clay and coal gangue are carried out mixing for standby use by proportioning;
B, screening: the raw material after mixing is carried out fragmentation, screening obtains aggregate and powder;
C, magnetic separation: powder reclaims after aluminium through ball mill and aggregate all carries out magnetic separation to reclaim iron;
D, batch mixing ageing: the water aggregate after magnetic separation and powder being added weight 10 ~ 15% enters mixer and mixes also ageing 4 ~ 8 days;
E, shaping: the batch mixing after ageing is obtained adobe through extrusion molding;
F, drying and dehydrating: by brick bat drying dehydration to water content 1 ~ 4%;
G, to fire: tunnel furnace is sent in the adobe after drying and dehydrating, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound;
H, fume treatment: the flue gas that sintering produces is recycled.
The described hammer crushing, the fragmentation of Hubei Province formula, ball mill crushing, several to what roll in fragmentation of being broken for.
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 is entered below grinding of ball grinder to 100 orders through ball mill recovery aluminium, and recovery selected by the metallic aluminium that can not grind.
Described drying and dehydrating is the one in seasoning, steam drying, the drying of stove tail gas.
The temperature of described drying and dehydrating is less than 125 DEG C.
Described fume treatment be adopt secondary spraying absorption tower absorb, then after calcium salt primary treatment and polymer alumina secondary treatment qualified discharge.
Aluminum electrolysis waste lagging material is utilized to produce insulating brick and the production method reclaiming carbon is waste and old lagging material, the clay got and coal gangue aluminium cell overhaul produced mixes in the ratio of 3:7:40 and carry out fragmentation, screening outward, select the particle of 1 ~ 2mm as aggregate, be less than the powder of 0.5mm as stopping composition, broken material selects metallic iron through magnetic separation, aggregate enters feed bin, the material sifted out enters below grinding of ball grinder to 100 orders together, and recovery selected by the metallic aluminium that can not grind, 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, takes out and is pressed into the adobe of client's desired shape with full two-stage vacuum extrusion machine and corresponding mould, below 125 DEG C, carry out drying after 4 ~ 8 days.Brick bat drying to water ratio less than 4% time, enter tunnel furnace, be raised to 850 DEG C by the heat-up rate of 60 DEG C/h, at 800 ~ 850 DEG C of temperature, be incubated 4 ~ 8 hours, after kiln discharge cooling get product, 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 during process, then through the flow process of activated alumina adsorption tower discharge.The waste water reclaimed in absorption tower, because of containing a small amount of fluorine, needs qualified discharge after calcium salt (carbide slag or lime) primary treatment and polymerize aluminum chloride secondary treatment, and 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.
Present invention process uses refuse in need of immediate treatment to replace the clay needing protection to be raw material, and burn till at a lower temperature, reduce energy consumption, various resource is all recycled, and the whole collection and purification process of gas, 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, the aggregate of the 1 ~ 3mm of 600Kg and the powder being less than 0.5mm of 350Kg is obtained through trommel screen screening, powder is reclaimed through ball mill and obtains 0.9Kg aluminium, magnetic separation is reclaimed and is obtained 0.5Kg iron, is reclaimed by aggregate and obtain 1.1Kg iron after magnetic separator magnetic separation.Water 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue being added 100Kg enters mixer and mixes also ageing 4 ~ 8 days, 240 × 240 × 115mm adobe is obtained through extrusion molding, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound insulating brick, the first secondary spraying absorption tower of the flue gas produced absorbs, and then discharges through activated alumina adsorption tower.
Insulating brick assay is: solid brick (being less than the brick of 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, the aggregate of the 1 ~ 3mm of 460Kg and the powder being less than 0.5mm of 460Kg is obtained through trommel screen screening, powder is reclaimed through ball mill and obtains 0.7Kg aluminium, magnetic separation is reclaimed and is obtained 0.4Kg iron, is reclaimed by aggregate and obtain 0.6Kg iron after magnetic separator magnetic separation.Water 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue being added 100Kg enters mixer and mixes also ageing 4 ~ 8 days, 240 × 240 × 115mm adobe is obtained through extrusion molding, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound insulating brick, the first secondary spraying absorption tower of the flue gas produced absorbs, and then discharges through activated alumina adsorption tower.
Insulating brick assay is: solid brick (being less than the brick of 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, the aggregate of the 1 ~ 3mm of 460Kg and the powder being less than 0.5mm of 460Kg is obtained through trommel screen screening, powder is reclaimed through ball mill and obtains 0.7Kg aluminium, magnetic separation is reclaimed and is obtained 0.4Kg iron, is reclaimed by aggregate and obtain 0.6Kg iron after magnetic separator magnetic separation.Water 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue being added 100Kg enters mixer and mixes also ageing 4 ~ 8 days, 240 × 240 × 115mm adobe is obtained through extrusion molding, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound insulating brick, the first secondary spraying absorption tower of the flue gas produced absorbs, and then discharges through activated alumina adsorption tower.
Insulating brick assay is: solid brick (being less than the brick of 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, the aggregate of the 1 ~ 3mm of 560Kg and the powder being less than 0.5mm of 360Kg is obtained through trommel screen screening, powder is reclaimed through ball mill and obtains 0.9Kg aluminium, magnetic separation is reclaimed and is obtained 0.4Kg iron, is reclaimed by aggregate and obtain 1.2Kg iron after magnetic separator magnetic separation.Water 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue being added 100Kg enters mixer and mixes also ageing 4 ~ 8 days, 240 × 240 × 115mm adobe is obtained through extrusion molding, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound insulating brick, the first secondary spraying absorption tower of the flue gas produced absorbs, and then discharges through activated alumina adsorption tower.
Insulating brick assay is: solid brick (being less than the brick of 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, the aggregate of the 1 ~ 3mm of 300Kg and the powder being less than 0.5mm of 620Kg is obtained through trommel screen screening, powder is reclaimed through ball mill and obtains 0.9Kg aluminium, magnetic separation is reclaimed and is obtained 0.4Kg iron, is reclaimed by aggregate and obtain 0.5Kg iron after magnetic separator magnetic separation.Water 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue being added 100Kg enters mixer and mixes also ageing 4 ~ 8 days, 240 × 240 × 115mm adobe is obtained through extrusion molding, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound insulating brick, the first secondary spraying absorption tower of the flue gas produced absorbs, and then discharges through activated alumina adsorption tower.
Insulating brick assay is: solid brick (being less than the brick of 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, the aggregate of the 1 ~ 3mm of 660Kg and the powder being less than 0.5mm of 260Kg is obtained through trommel screen screening, powder is reclaimed through ball mill and obtains 1.0Kg aluminium, magnetic separation is reclaimed and is obtained 0.4Kg iron, is reclaimed by aggregate and obtain 0.7Kg iron after magnetic separator magnetic separation.Water 100Kg aggregate after magnetic separation and 250Kg powder and 600Kg coal gangue being added 100Kg enters mixer and mixes also ageing 4 ~ 8 days, 240 × 240 × 115mm adobe is obtained through extrusion molding, drying kiln drying and dehydrating is to water content 1 ~ 4%, send into tunnel furnace, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound insulating brick, the first secondary spraying absorption tower of the flue gas produced absorbs, and then discharges through activated alumina adsorption tower.
Insulating brick assay is: solid brick (being less than the brick of 25% without hole or hole) Morse intensity is greater than MU15.
Claims (7)
1. the colliery wastes brick utilizing aluminum cell waste lagging material to produce, it is characterized in that described colliery wastes brick raw material is aluminum cell waste lagging material, clay and coal gangue, its weight ratio is 2 ~ 4:6 ~ 8:35 ~ 45; Preparation method comprise get the raw materials ready, sieve, magnetic separation, batch mixing ageing, shaping, drying and dehydrating, fire, fume treatment step, specifically comprise:
A, to get the raw materials ready: raw material aluminum cell waste lagging material, clay and coal gangue are carried out mixing for standby use by proportioning;
B, screening: the raw material after mixing is carried out fragmentation, screening obtains aggregate and powder;
C, magnetic separation: powder reclaims after aluminium through ball mill and aggregate all carries out magnetic separation to reclaim iron;
D, batch mixing ageing: by the aggregate after magnetic separation and powder, batch mixing weight proportion is 2 ~ 4:6 ~ 8, and the water adding weight 10 ~ 15% enters mixer and mixes also ageing 4 ~ 8 days;
E, shaping: the batch mixing after ageing is obtained adobe through extrusion molding;
F, drying and dehydrating: by brick bat drying dehydration to water content 1 ~ 4%;
G, to fire: tunnel furnace is sent in the adobe after drying and dehydrating, be incubated 4 ~ 8h at 800 ~ 850 DEG C after, cooling obtains target compound;
H, fume treatment: the flue gas that sintering produces is recycled.
2. the preparation method of the colliery wastes brick utilizing aluminum cell waste lagging material to produce according to claim 1, is characterized in that the described hammer crushing, the fragmentation of Hubei Province formula, ball mill crushing, several to what roll in fragmentation of being broken for.
3. the preparation method of the colliery wastes brick utilizing aluminum cell waste lagging material to produce according to claim 1, it is characterized in that described aggregate diameter is 1 ~ 3mm, described powder diameter is below 0.5mm.
4. the preparation method of the colliery wastes brick utilizing aluminum cell waste lagging material to produce according to claim 1, it is characterized in that described to reclaim aluminium through ball mill be powder is entered below grinding of ball grinder to 100 orders, recovery selected by the metallic aluminium that can not grind.
5. the preparation method of the colliery wastes brick utilizing aluminum cell waste lagging material to produce according to claim 1, is characterized in that described drying and dehydrating is the one in seasoning, steam drying, the drying of stove tail gas.
6. the preparation method of the colliery wastes brick utilizing aluminum cell waste lagging material to produce according to claim 1 or 5, is characterized in that the temperature of described drying and dehydrating is less than 125 DEG C.
7. the preparation method of the colliery wastes brick utilizing aluminum cell waste lagging material to produce according to claim 1, it is characterized in that described fume treatment be adopt secondary spraying absorption tower 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 CN103755312A (en) | 2014-04-30 |
| CN103755312B true CN103755312B (en) | 2015-06-24 |
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| 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 |
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