CN109402672A - A kind of method and aluminium lime-ash forming blocks of waste aluminium ash comprehensive utilization - Google Patents
A kind of method and aluminium lime-ash forming blocks of waste aluminium ash comprehensive utilization Download PDFInfo
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- CN109402672A CN109402672A CN201810034885.5A CN201810034885A CN109402672A CN 109402672 A CN109402672 A CN 109402672A CN 201810034885 A CN201810034885 A CN 201810034885A CN 109402672 A CN109402672 A CN 109402672A
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- Prior art keywords
- ash
- aluminium
- anode
- aluminium lime
- lime
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
- C25C3/125—Anodes based on carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/54—Producing shaped prefabricated articles from the material specially adapted for producing articles from molten material, e.g. slag refractory ceramic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The present invention discloses the method and aluminium lime-ash forming blocks of a kind of waste aluminium ash comprehensive utilization, it is the following steps are included: (1) is mixed and stirred for aluminium lime-ash and binder, water to make it have bonding characteristic；(2) by the extrusion forming in a mold of the aluminium lime-ash after stirring；(3) the aluminium lime-ash forming blocks disengageding mould after extrusion forming is dried；(4) the aluminium lime-ash forming blocks after drying process are mounted on new anode and upper slot uses；(5) using after 28 days, anode is consumed slot on, and material is mixed into crust block in aluminium lime-ash forming blocks and slot, takes out the anode and crust block thereon of consumption；(6) by crust block crushing, its granularity is made to account for 18~30% less than 44 microns；(7) crust block for meeting granularity is covered on new anode, does anti-oxidant and thermal insulation material, the present invention, which is able to achieve, utilizes discarded aluminium lime-ash, by the utilization to it, plays the double effects of anti-anodic oxidation and upper part of the electrolytic cell heat preservation.
Description
Technical field
The present invention relates to a kind of method of waste aluminium ash comprehensive utilization and aluminium lime-ash forming blocks, belong to aluminum electrolysis technology neck
Domain.
Background technique
Aluminium is the essential important light metal material of national economy sustainable development, in aerospace, traffic, is built
Build, the industrial applications such as national defence, power electronics it is extensive.Aluminum Electrolysis Production is related to numerous industries such as electric power, machinery, raw material, industry
The degree of association is up to 93%.Develop electrolytic aluminum industry, is conducive to the technological progress and industry development that drive relevant industries, improves industry
The contribution rate of GDP.The Chinese government pays much attention to aluminum i ndustry industry restructuring and upgrading, has put into effect a series of policies and has arranged
It applies, actively promotes the expansion application " with aluminium for steel, with aluminium section copper, with aluminium section wood ".
Alumina molten salt electrolysis method is the unique method of current aluminum production, generallys use large-scale intermediate blanking prebaked anode
Electrolytic cell production.That is: feed-in high current (maximum 600kA) direct current into electrolytic cell, using carbon materials as anode, Ruo Ganyang
Pole divides the parallel connection of the side A, B to input, middle part setting alumina blanking point, between 930-960 DEG C of electrolytic cell running temperature, slot internal oxidition
Aluminium generates electrochemical reaction, in cathode precipitating metal molten aluminum product under electrolyte solvent effect.Its key reaction formula are as follows:
AL2O3 + 1.5C =2AL +1.5CO2↑
As the pre-baked anode carbon block of conductive material, at high operating temperatures, oxidation reaction will be occurred by contacting with air, nothing occurs
Benefit wastes, and increases production cost.For this purpose, need to cover one layer of raw material in anode upper surface during aluminum electrolysis, it is main
It acts on: first is that contact of the isolation prebaked anode with air, prevents anodic oxidation, second is that keeping the temperature to upper part of the electrolytic cell, subtract
Few heat loss, improves utilization rate of electrical.In order to which the raw material guaranteed on anode give full play to anti-oxidation and insulation effect, absolutely mostly
The key operation regulation of number electrolytic aluminium factory --- it is distinctly claimed in the operation of replacement anode: " after new anode is installed, with knot
Shell block vallum at seam in the anode, then covers extremely upper insulation material ... on anode ", since there are biggish seams between crust block
Gap, a large amount of mulch slide the material balance for entering in electrolytic cell and destroying electrolytic cell, and in electrolytic cell there is no anode surface at seam
It is covered well, causes position anode block oxidation serious, not only increase anode consumption, and steel pawl is exposed, high temperature
Occur the fusing of steel pawl under state, increase Fe content, the purity of electrolytic aluminium liquid by serious influence so that
The alloy product of certain demands cannot be produced.
To prevent anodic oxidation, partial electrolyte aluminium manufacturer takes the casting prefabricated caulking joint of electrolyte solution method at seam in the anode at present
Wall makes mold according to anode shape, is mounted on new anode, scoop electrolyte solution moulding by casting, replaces anode scrap.This method
Not only large labor intensity, and there are biggish security risk,
The primary aluminum of aluminium cell production, it is also non-containing aluminium oxide, carbon granule, gas etc. in addition to containing metal impurities such as iron, silicon, copper
Metal impurities, these impurity are present in molten aluminum, have severely impacted the physical property, mechanical performance and craftsmanship of aluminium product
Energy.Therefore, in aluminium product processes, Yao Jinhang molten aluminum purification, as far as possible reduction molten aluminum in nonmetallic inclusion, as aluminium oxide,
Carbon granule, gas etc..Usually using the fused salt mixt of the chlorine of alkali metal and fluoride as cleanser or coverture, flux is in molten aluminum
In separate, form a large amount of fine droplets, wettability is good, has very strong absorption and solvability to oxidizing slag, makes aluminium oxide etc.
Impurity dissolution floats to surface and forms dross, separates with aluminium, which is known as aluminium lime-ash, is clawed using mucking machine.
The aluminium lime-ash clawed in from smelting furnace (holding furnace), contains more aluminium, it is generally the case that founding manufacturer is for aluminium ash
The recycling of slag, all only recycles aluminium, remaining lime-ash is discarded.The main component of analysis detection, waste aluminium lime-ash has: 10%Al,
60~70%Al2O3,1.0~2.0%SiO2,0.5~0.7%Na2O, 0.4~0.6% MgO, 1.0~3.0 %CaO and < 1.0 %
FeO+ MnO；
In environmental requirement increasingly strict today, due to, containing elements such as magnesium, manganese, silicon, being unable to outlet, only in discarded aluminium lime-ash
It can be recycled by environmental protection administration, enterprise need to pay 800-1500 yuan/ton of processing cost.
Under normal circumstances, the waste aluminium lime-ash that founding generates, accounts for 1 % of aluminium yield or so.According to statistics, China's electricity in 2015
Solving aluminium industry aggregated capacity is 38,940,000 tons, that is, has 38.94 ten thousand tons of waste aluminium lime-ash, enterprise will pay 31152 --- 584,100,000
The processing cost of member.
That is: the technology for now needing a kind of waste aluminium ash comprehensive utilization is able to achieve and carries out comprehensive benefit to discarded aluminium lime-ash
With playing the double effects of anti-anodic oxidation and upper part of the electrolytic cell heat preservation by the utilization to it.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of waste aluminium ash comprehensive utilization and aluminium ash slag formings
Block is able to achieve and utilizes to discarded aluminium lime-ash, by the utilization to it, plays anti-anodic oxidation and upper part of the electrolytic cell heat preservation
Double effects, can be with overcome the deficiencies in the prior art.
The technical scheme is that the method and aluminium lime-ash forming blocks of a kind of waste aluminium ash comprehensive utilization, this method
The following steps are included: (1) is mixed and stirred for aluminium lime-ash and binder, water to make it have bonding characteristic；(2) by the aluminium after stirring
Lime-ash extrusion forming in a mold；(3) the aluminium lime-ash forming blocks disengageding mould after extrusion forming is dried；(4) will
Aluminium lime-ash forming blocks after drying process are mounted on new anode and upper slot uses；(5) using after 28 days, anode is disappeared slot on
Consumption, material is mixed into crust block in aluminium lime-ash forming blocks and slot, takes out the anode and crust block thereon of consumption；It (6) will crust
Block is broken, its granularity is made to account for 18~30% less than 44 microns；(7) crust block for meeting granularity is covered on new anode,
Do anti-oxidant and thermal insulation material.
Above-mentioned binder is compound cellulose 9005.
Aluminium lime-ash forming blocks involved in a kind of method of waste aluminium ash comprehensive utilization, it is installed on anode upper surface,
It includes rectangular block shape ontology made of aluminium lime-ash and binder, is equipped with half cone connected in star in the side of rectangular block shape ontology, partly
The tapered protrusion that conical socket is equipped with anode upper surface fits.
The prior art compares, and the method and aluminium lime-ash forming blocks, this method of waste aluminium ash comprehensive utilization of the present invention include
Following steps: (1) it is mixed and stirred for aluminium lime-ash and binder, water to make it have bonding characteristic；(2) by the aluminium lime-ash after stirring
Extrusion forming in a mold；(3) the aluminium lime-ash forming blocks disengageding mould after extrusion forming is dried；(4) it will dry
Aluminium lime-ash forming blocks that treated are mounted on new anode and upper slot uses；(5) slot is using after 28 days on, and anode is consumed, aluminium
Material is mixed into crust block in lime-ash forming blocks and slot, takes out the anode and crust block thereon of consumption；(6) crust block is broken
It is broken, so that its granularity is accounted for 18~30% less than 44 microns；(7) crust block for meeting granularity is covered on new anode, in this way
Method, waste aluminium lime-ash is first made into aluminium lime-ash forming blocks, then as new anode and upper slot use, and it is mixed with material in slot
Crust block is synthesized, being coated on new anode after such crust block crushing has good anti-oxidant and thermal insulation property, that is, in fact
Show and discarded aluminium lime-ash has been comprehensively utilized, while the new anode of effective protection, extending its durability, party's legal system
At good oxidation resistance can and the crust block of thermal insulation property have good market prospects, effectively increase Production Gain；Upper slot makes
With crust block is just removed after 28 days, by crust block crushing, make its granularity less than 44 microns account for 18~30% and binder be
Compound cellulose 9005, this is all the more reasonable data obtained by test of many times, can make last crust obtained in this way
Block has preferable inoxidizability and heat insulating ability；
Aluminium lime-ash forming blocks involved in a kind of method of waste aluminium ash comprehensive utilization, it is installed on anode upper surface, it is wrapped
Rectangular block shape ontology made of aluminium lime-ash and binder is included, is equipped with half cone connected in star, half-cone in the side of rectangular block shape ontology
The tapered protrusion that groove is equipped with anode upper surface fits, such structure, be conducive to the installation of aluminium lime-ash forming blocks with it is new
On anode, and with slot on new anode.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that aluminium lime-ash forming blocks of the invention are mounted on anode.
Fig. 2 is the structural schematic diagram on anode of the present invention.
Fig. 3 is the present invention and aluminium lime-ash forming blocks schematic diagram.
Wherein, anode 100；Rectangular block shape ontology 101；Half cone connected in star 102；Tapered protrusion 103.
Specific embodiment
The present invention a kind of method and aluminium lime-ash forming blocks of waste aluminium ash comprehensive utilization, as shown in Figure 1, involved by this method
And aluminium lime-ash forming blocks, it is installed on 100 upper surface of anode, it includes rectangular block shape ontology made of aluminium lime-ash and binder
101, it is equipped with half cone connected in star 102 in the side of rectangular block shape ontology 101, half cone connected in star 102 is equipped with 100 upper surface of anode
Tapered protrusion 103 fit.
Embodiment 1
Aluminium lime-ash and binder compound cellulose 9005, water are mixed and stirred for by the first step；
Second step, by the extrusion forming in a mold of the aluminium lime-ash after stirring；
Aluminium lime-ash forming blocks disengageding mould after extrusion forming is dried third step；
Aluminium lime-ash forming blocks after drying process are mounted on new anode 100 and upper slot use by the 4th step, during installation, half
The tapered protrusion 103 that conical socket 102 is equipped with 100 upper surface of anode fits；
5th step, after upper slot uses 28 days, anode is consumed, and material is mixed into crust block in aluminium lime-ash forming blocks and slot, is taken out
The anode 100 of consumption and crust block thereon；
Crust block crushing is made its granularity account for 18% less than 44 microns by the 6th step；
The crust block for meeting granularity is covered on new anode 100 by the 7th step；
Embodiment 2
Aluminium lime-ash and binder compound cellulose 9005, water are mixed and stirred for by the first step；
Second step, by the extrusion forming in a mold of the aluminium lime-ash after stirring；
Aluminium lime-ash forming blocks disengageding mould after extrusion forming is dried third step；
Aluminium lime-ash forming blocks after drying process are mounted on new anode 100 and upper slot use by the 4th step, during installation, half
The tapered protrusion 103 that conical socket 102 is equipped with 100 upper surface of anode fits；
5th step, after upper slot uses 28 days, anode is consumed, and material is mixed into crust block in aluminium lime-ash forming blocks and slot, is taken out
The anode 100 of consumption and crust block thereon；
Crust block crushing is made its granularity account for 24% less than 44 microns by the 6th step；
The crust block for meeting granularity is covered on new anode 100 by the 7th step；
Embodiment 3
Aluminium lime-ash and binder compound cellulose 9005, water are mixed and stirred for by the first step；
Second step, by the extrusion forming in a mold of the aluminium lime-ash after stirring；
Aluminium lime-ash forming blocks disengageding mould after extrusion forming is dried third step；
Aluminium lime-ash forming blocks after drying process are mounted on new anode 100 and upper slot use by the 4th step, during installation, half
The tapered protrusion 103 that conical socket 102 is equipped with 100 upper surface of anode fits；
5th step, after upper slot uses 28 days, anode is consumed, and material is mixed into crust block in aluminium lime-ash forming blocks and slot, is taken out
The anode 100 of consumption and crust block thereon；
Crust block crushing is made its granularity account for 30% less than 44 microns by the 6th step；
The crust block for meeting granularity is covered on new anode 100 by the 7th step；
By embodiment 1,2,3, the crust block being finally made into after broken, make its granularity less than 44 microns account for 18~
After 30% is covered on anode 100, there is preferable antioxygenic property and thermal insulation property to anode 100.
Claims (3)
1. a kind of method of waste aluminium ash comprehensive utilization, which is characterized in that it is the following steps are included: (1) is by aluminium lime-ash and glues
Knot agent, water are mixed and stirred for making it have bonding characteristic；(2) by the extrusion forming in a mold of the aluminium lime-ash after stirring；(3) it will squeeze
Aluminium lime-ash forming blocks disengageding mould after molded is dried；(4) the aluminium lime-ash forming blocks after drying process are installed
In new anode and the use of upper slot；(5) slot is using after 28 days on, and anode is consumed, and aluminium lime-ash forming blocks are mixed with material in slot
At crust block, the anode and crust block thereon of consumption are taken out；(6) by crust block crushing, make its granularity accounting for less than 44 microns
To 18~30%；(7) crust block for meeting granularity is covered on new anode, does anti-oxidant and thermal insulation material.
2. the method for waste aluminium ash comprehensive utilization according to claim 1, it is characterised in that: the binder is multiple
Condensating fiber element 9005.
3. aluminium lime-ash forming blocks involved in a kind of method of waste aluminium ash comprehensive utilization, it is installed on anode (100) upper end
Face, it is characterised in that: it includes rectangular block shape ontology (101) made of aluminium lime-ash and binder, in rectangular block shape ontology (101)
Side be equipped with half cone connected in star (102), the tapered protrusion (103) that half cone connected in star (102) and anode (100) upper surface are equipped with
It fits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034885.5A CN109402672A (en) | 2018-01-15 | 2018-01-15 | A kind of method and aluminium lime-ash forming blocks of waste aluminium ash comprehensive utilization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810034885.5A CN109402672A (en) | 2018-01-15 | 2018-01-15 | A kind of method and aluminium lime-ash forming blocks of waste aluminium ash comprehensive utilization |
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| CN109402672A true CN109402672A (en) | 2019-03-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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