CN102976774A - Heat-insulating and sealing material for inert-anode aluminum electrolysis cell and preparation method thereof - Google Patents
Heat-insulating and sealing material for inert-anode aluminum electrolysis cell and preparation method thereof Download PDFInfo
- Publication number
- CN102976774A CN102976774A CN2012104839011A CN201210483901A CN102976774A CN 102976774 A CN102976774 A CN 102976774A CN 2012104839011 A CN2012104839011 A CN 2012104839011A CN 201210483901 A CN201210483901 A CN 201210483901A CN 102976774 A CN102976774 A CN 102976774A
- Authority
- CN
- China
- Prior art keywords
- content
- micro mist
- insulation
- less
- corundum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to a heat-insulating and sealing material for an inert-anode aluminum electrolysis cell and a preparation method thereof. The material is characterized by comprising a dense layer, a transition layer and a heat insulating layer which are sequentially integrated, wherein the dense layer is made from a corundum casting material, the transition layer is made from slurry which is prepared from micro powder and slurry liquid, and the heat insulating layer is made from a lightweight casting material. According to the heat-insulating and sealing material for the inert-anode aluminum electrolysis cell, disclosed by the invention, the advantages of compaction and corrosion resistance of the corundum casting material and heat insulation of the lightweight casting material are integrated, the problem of cracking caused by the fact that the expansion coefficients of the two materials are not matched under a high temperature is solved, and therefore the material can be used for sealing and heat insulating for the inert-anode aluminum electrolysis cell very well.
Description
Technical field
The present invention relates to a kind of inert anode aluminium cell with being incubated and sealing material and preparation method thereof.
Background technology
Existing aluminium industry is that the prebaked cell for aluminum-reduction take carbon anode as principal character carries out former aluminum smelting technology.This pre-baked carbon anode aluminium cell is ripe and obtained very large development and progress on technology and technique, becomes the main flow grooved of aluminum current industry.But carbon anode aluminum smelting technology technology still exists its intrinsic shortcoming: high-quality charcoal element consumes larger, needs constantly to replenish and change carbon anode, causes huge pressure to resource; Discharge a large amount of CO
2And fluorocarbon etc., cause serious pollution to environment; The production process high energy consumption.Although direct current consumption can be reduced to 13000kWh/t(Al) below, its capacity usage ratio still only has about 50%, has also brought white elephant for electric power resource.
What at present, Aluminum Industry in The World was generally admitted is to adopt the inert anode aluminum electrolyzation technology to solve the negative issue that the carbon anode electrolysis of aluminum brings.Inert anode consumes hardly, and the replacement cycle is long, produces more stable; What production process was discharged is oxygen, and can not discharge CO
2And fluorocarbon; And might realize varying load production, be conducive to balance electrical network peak-valley electric energy.But because the singularity of inert anode aluminum electrolyzation technology, the industrialization inert anode aluminium cell need to be used more anti-corrosion lagging material and be incubated and seal, and to reduce the heat lost by radiation of aluminium cell, reaches the purpose that reduces energy consumption.
The theoretical lowest energy consumption of inert anode aluminium cell is 9240kWh/t(Al), be higher than traditional carbon anode aluminium cell.Tradition carbon anode aluminum electrolysis cell upper part is to make ionogen upper surface crust by heat radiation, and adds one deck aluminum oxide at crust and realize.This mode heat dissipation capacity is very large, finally causes the aluminium cell capacity usage ratio to be difficult to improve (about 50%).If the electrolyte levels of inert anode aluminium cell top adopts special fire-resistant corrosion-resistant material to be incubated and to seal, do not allow ionogen naturally crust, make electrolyzer integral body be " thermal-insulating type " groove, then total heat lost by radiation meeting reduces greatly.Add advantage on the inert anode aluminium cell structure design (as: the electrode reaction area in the unit volume is large, and pole span is low), the comprehensive energy consumption of inert anode aluminium cell is not higher than even is lower than existing pre-baked carbon anode aluminium cell.
Ionogen top to the inert anode electrolyzer is incubated and seals, and just needs used material can resist the erosion of ionogen atmosphere.For ionogen atmosphere corrosion characteristic, and in conjunction with the many experimental results that we did in the past, find to adopt alumina content or the higher material of spinel content, can within the relatively long time, resist the corrosion of ionogen atmosphere.But material is had following requirement: (1) has higher purity and density; (2) foreign matter content is few, particularly the content of silicon (Si), iron (Fe) etc.; (3) easy construction is convenient to be made into shape and the special goods of size, particularly becomes the large size goods; (4) have enough intensity and thermal shock resistance; (5) has relatively low cost.
These characteristics for inert anode aluminium cell, and to the requirement of material, the inventor herein is in patent 201110166652.9, " inert anode aluminium cell fire-resistant corrosion-resistant material of indefinite form and preparation method thereof " proposed, this material can perform well in inert anode aluminium cell, the erosion of opposing ionogen atmosphere, but its heat-insulating property or heat conductivility are not set forth.
The patent No. is that 200810228234 Chinese patent application discloses a kind of alumina bubble lightweight insulating refractory casting material.Described its of this patent has good heat-insulating property (600 ℃, thermal conductivity is less than 0.39).But its silicone content is higher, is up to 10%, so it can not be directly used in the erosion of opposing ionogen atmosphere.
The patent No. is that the Chinese patent of CN200610018089.X discloses a kind of permeable fireproof materials for aluminium refining and preparation method thereof.This patent is described: its material is comprised of sintering synthesis of densified calcium hexaluminate material, plate diamond spar, fused white corundum, soft clay, quartz, kyanite, chromoxide green etc., has the preferably ability of anti-aluminium liquid infiltration.But this patent does not illustrate the erosional competency of this material opposing ionogen atmosphere, and the prepared material of this patent is for the also not yet explanation of heat insulation effect of aluminium cell.
The patent No. is that the Chinese patent application of CN200410013257.7 discloses a kind of magnalium light thermal insulation fire-resistant material and preparation method thereof.The material that this patent is prepared, because the main body of material is magnesite powder and alumine powder, intensity is not high, and the alumine powder can be introduced a large amount of element silicons.
Application number is US 4,481,052 United States Patent (USP) Method of making refractory hard metal containing tiles for aluminum cell cathodes, this patent has mainly been told about and has been used for the fixedly parts of wenable cathode on a kind of aluminium cell with self-baking anode, these parts are made by the hard refractory materials, are used for reducing the work-ing life that electrical loss increases negative electrode simultaneously.Because the material of these parts is directly in the face of the liquid level of aluminium electrolyte, so material corrosion-resistant required low.
Above all patent Introductions or disclosed material all are the materials of homogeneous, or are fine and close mould material, or are the mould material of light thermal-insulation type.Its thermal conductivity of compactness mould material can be relatively large, and the light thermal-insulation type often its purity, intensity are difficult to reach requirement.If fine and close mould material and lightening casting material simply are superimposed, can ftracture because of the unmatched problem of the coefficient of expansion under the high temperature between the two.Fine and close mould material and lightening casting material are not made the technology of composite gradient material in the open source literature.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists for above-mentioned prior art, a kind of inert anode electrolyzer top that is applied to is provided, can resist for a long time the erosion of ionogen atmosphere, the inert anode aluminium cell of enough good heat insulation effect be arranged with being incubated and sealing material and preparation method thereof.
The objective of the invention is to be achieved through the following technical solutions.
A kind of inert anode aluminium cell is characterized in that with insulation and sealing material this material is included as the tight zone of corundum pouring material with becaming one successively, makes transition layer for the slurry of micro mist and slurries preparation, is the thermal insulation layer of lightening casting material.
A kind of inert anode aluminium cell of the present invention is with insulation and sealing material, it is characterized in that described corundum pouring material is to select a kind of in pure corundum pouring material, the corundum-magnesium-aluminium spinel matter mould material.
A kind of inert anode aluminium cell of the present invention is characterized in that the Al in described corundum-magnesium-aluminium spinel matter mould material with insulation and sealing material
2O
3With MgO gross weight content greater than 95%, SiO
2Content less than 0.1%, CaO content less than 1.5%, Na
2O content is less than 0.5%, Fe
2O
3Content is less than 0.1%.
A kind of inert anode aluminium cell of the present invention is with being incubated and sealing material, it is characterized in that described lightening casting material selects hollow ball, mullite synthesizing as aggregate, adopt sintering plate corundum fine powder, magnesium-aluminium spinel fine powder, multimodal Calcined polishing aluminum oxide micro mist, ρ-alumina powder, dispersed alumina powder and pure calcium aluminate cement as matrix, evenly being mixed forms.
A kind of inert anode aluminium cell of the present invention is characterized in that with insulation and sealing material the aggregate part by weight is 68%-72% in the described lightening casting material; The part by weight that matrix accounts for is 28%-32%; Surplus is to do the meal of matrix.
A kind of inert anode aluminium cell of the present invention is with insulation and sealing material, it is characterized in that the hollow ball part by weight in the aggregate of described lightening casting material is 10%-35%; Its material is selected from alumina hollow ball, floats one or both combinations in the pearl.
A kind of inert anode aluminium cell of the present invention is with insulation and sealing material, it is characterized in that the alumina hollow ball particle diameter 0-3mm in the aggregate of described lightening casting material, Al
2O
3Content 〉=90wt%; Described bead footpath 0-3mm, the Al of floating
2O
3Content 〉=35wt%.
A kind of inert anode aluminium cell of the present invention is with insulation and sealing material, it is characterized in that the mullite synthesizing particle in the aggregate of described lightening casting material has different size-grade distribution; Wherein particle diameter is that the shared weight ratio of mullite synthesizing pellet of 3-6mm is 15%-26%; Particle diameter is that the shared weight ratio of the mullite synthesizing particulate material of 1-3mm is 12%-20%; Particle diameter is that the shared weight ratio of the mullite synthesizing particulate material of 0-1mm is 10%-16%.Al in the described mullite synthesizing particle
2O
3Content 〉=42 wt%.
A kind of inert anode aluminium cell of the present invention is characterized in that the matrix components of described lightening casting material comprises: particle diameter≤0.045mm sintering plate corundum fine powder 8%-12% with insulation and sealing material; Magnesium-aluminium spinel fine powder 0%-5%; Multimodal Calcined polishing aluminum oxide micro mist 5%-12%; Active ρ-Al2O3 micro mist 0%-7%; Dispersed alumina powder 1%; Pure calcium aluminate cement 2%-6%.
A kind of inert anode aluminium cell of the present invention is characterized in that in the matrix components of described lightening casting material Al in the sintering plate corundum fine powder with insulation and sealing material
2O
3Content 〉=99.5 wt%, magnesium-aluminium spinel fine powder Al
2O
3Content 〉=74wt%, the Al of multimodal Calcined polishing aluminum oxide micro mist
2O
3Content 〉=99.6wt%, active ρ-Al
2O
3The Al of micro mist
2O
3After content 99.8wt%(removes igloss), the Al of dispersed aluminum oxide
2O
3Content 80wt%, the Al of pure calcium aluminate cement
2O
3Content 73wt%; The mean particle size of described multimodal Calcined polishing aluminum oxide micro mist is less than 0.02mm; Described active ρ-Al
2O
3The mean particle size of micro mist is less than 0.005mm, adopts special method for calcinating to activate, and has good hydrophilic active.
A kind of inert anode aluminium cell of the present invention is characterized in that with insulation and sealing material described transition layer slurry is formulated by micro mist and slurries, and wherein micro mist quality percentage composition accounts for 65%-75%, and slurries quality percentage composition accounts for 25%-35%; Described micro mist is selected from one or more combinations in zirconium white, calcining α-aluminum oxide, the yttrium oxide; Described its median size of calcining α-aluminum oxide micro mist is less than 0.02mm; Described slurries are selected from a kind of in water, phosphate aqueous solution, the phosphate dihydrogen aluminum solution.
A kind of inert anode aluminium cell of the present invention is characterized in that adding in the described transition layer slurry fiber of 0%-0.2% with being incubated and sealing material, to increase the toughness of transition layer; Described fiber is selected from one or more combinations in charcoal fiber, silicon carbide fiber, the sapphire whisker; Described Fibre diameter is less than 100um, and length is less than 1mm.
A kind of inert anode aluminium cell preparation method of insulation and sealing material, it is characterized in that its preparation process at first will be built as the lightening casting material of thermal insulation layer, jolt ramming in building mould, after it produces initial set, transition layer slurry on its external coating, slurry will be built in building mould as the corundum pouring material of tight zone after brushing evenly again, use the transition layer slurry, tight zone mould material and thermal insulation layer mould material are combined into one common maintenance moulding.
A kind of inert anode aluminium cell of the present invention preparation method of insulation and sealing material, it is characterized in that being coated with the thickness that brushes the transition layer pulp layer is 1-2mm.
A kind of inert anode aluminium cell of the present invention preparation method of insulation and sealing material, it is characterized in that its preparation process is that the insulated pouring material is built on the one side of building mould first, build the width that is separated out first the insulated pouring material in the mould by dividing plate, after the insulated pouring material is built complete and is produced initial set, dismantle and build dividing plate in the mould, the thick transition layer slurry of 1-2mm on the end face brush of insulation pouring material, slurry are built corundum pouring material and are finished after brushing evenly at the other side of building mould.
A kind of inert anode aluminium cell of the present invention is characterized in that dense layer thickness more than or equal to 20mm with the preparation method of insulation with sealing material, and insulation is thickness more than or equal to 20mm, and transition region thickness is less than or equal to 2mm;
A kind of inert anode aluminium cell of the present invention is characterized in that with the preparation method of insulation with sealing material mould material is when construction is stirred, with clean tap water or pure water; Water temperature greater than 5 ℃ less than 25 ℃, the envrionment temperature of working-yard greater than 5 ℃ less than 25 ℃; Build complete after, maintenance 24-48 hours, the again demoulding and carry out drying and processing.
A kind of inert anode aluminium cell of the present invention selects corundum pouring material to make tight zone with insulation and sealing material and preparation method thereof, and lightening casting material is made thermal insulation layer, and the transition layer slurry of micro mist and slurries preparation is made transition layer.In when construction three layers are built and to become one together maintenance moulding.Tight zone is in the bottom during use, and opposing ionogen atmosphere corrodes; Thermal insulation layer plays insulation effect up; Transition layer is in the centre, alleviates the up and down two-layer cracking that causes because of expansion coefficient difference.
A kind of inert anode aluminium cell of the present invention is with being incubated and sealing material, namely merged the advantage that corundum pouring material is fine and close, anticorrosive and the light thermal-insulation mould material is incubated, solved again between bi-material that the coefficient of expansion under the high temperature does not mate and the problem that ftractures can be good at inert anode aluminium cell is sealed and is incubated.
Embodiment
Below in conjunction with embodiment, describe the present invention in detail:
Embodiment 1
(1) does tight zone with the pure corundum pouring material of self-control.Its comprehensive composition: Al
2O
3The total percentage composition of quality is greater than 98wt%, SiO
2Content is less than 0.05wt%, and CaO content is less than 1.5wt%, Na
2O content is less than 0.5wt%, Fe
2O
3Content is less than 0.1wt%.
(2) lightening casting material is done aggregate with alumina hollow ball and mullite synthesizing particle, and each material is by following weight preparation.
Alumina hollow ball particle diameter 0-3mm 10%;
Mullite synthesizing grain diameter 3-5mm 26%;
Mullite synthesizing grain diameter 1-3mm 20%;
Mullite synthesizing grain diameter 0-1mm 16%;
Sintering plate corundum fine powder particle diameter≤0.045mm 10%;
Magnesium-aluminium spinel fine powder particle diameter≤0.045mm 5%;
Multimodal Calcined polishing aluminum oxide micro mist 5%;
Active ρ alumina powder 2%;
Dispersed alumina powder 1%;
Pure calcium aluminate cement 5%;
Wherein, Al in the alumina hollow ball
2O
3Content 〉=90wt%, Al in the lightweight mullite synthesizing
2O
3Content 〉=42 wt%, Al in the sintering plate corundum fine powder
2O
3Content 〉=99.5 wt%, magnesium-aluminium spinel fine powder Al
2O
3Content 〉=74wt%, the Al of multimodal Calcined polishing aluminum oxide micro mist
2O
3Content 〉=99.6wt%, active ρ-Al
2O
3The Al of micro mist
2O
3After content 99.8wt%(removes igloss), the Al of dispersed aluminum oxide
2O
3Content 80wt%, the Al of pure calcium aluminate cement
2O
3Content 73wt%; The mean particle size of multimodal Calcined polishing aluminum oxide micro mist is less than 0.02mm; Active ρ-Al
2O
3The mean particle size of micro mist is less than 0.005mm, adopts special method for calcinating to activate, and has good hydrophilic active.
(3) with zirconium white micro mist and water preparation transition layer slurry, prepare by following part by weight:
Zirconium white micro mist median size≤0.02mm 65%;
Pure water 35%;
First lightening casting material is cast in the bottom of building mould when (4) building, paves jolt ramming, until (about 30min) after the initial set, at the thick transition layer slurry of its surface brush 1-2mm, above again the corundum castable that stirs being cast in, pave jolt ramming.After its initial set (about 40min), cover with plastics film, and at 20 ℃ indoor maintenance 48h.110 ℃ of oven dry 48h after the demoulding.
Lightening casting material first with the aglite water-wet, adds pure calcium aluminate cement and part powder when stirring again, more remaining powder and water is added stirring after stirring, to avoid the light material come-up.
Mould material is when stirring, and with clean tap water, 18 ℃ of water temperatures stir 22 ℃ of envrionment temperatures.Wherein the lightening casting material water consumption is 5.2wt%; The corundum castable water consumption is 4.6wt%.
(5) with the formulated complex gradient mould material of this example, make some standards and inert anode electrolyzer goods, use for analyzing and testing.Analyzing and testing the results are shown in following table.
Embodiment 2
(1) does tight zone with self-control corundum-magnesium-aluminium spinel matter mould material.Its comprehensive composition: Al
2O
3The total percentage composition of+MgO quality is greater than 98wt%, SiO
2Content is less than 0.05wt%, and CaO content is less than 1.5wt%, Na
2O content is less than 0.5wt%, Fe
2O
3Content is less than 0.1wt%.
(2) lightening casting material is done aggregate with alumina hollow ball and mullite synthesizing particle, and each material is by following weight preparation.
Alumina hollow ball particle diameter 0-3mm 35%;
Mullite synthesizing grain diameter 3-5mm 15%;
Mullite synthesizing grain diameter 1-3mm 12%;
Mullite synthesizing grain diameter 0-1mm 10%;
Sintering plate corundum fine powder particle diameter≤0.045mm 8%;
Multimodal Calcined polishing aluminum oxide micro mist 10%;
Active ρ alumina powder 7%;
Dispersed alumina powder 1%;
Pure calcium aluminate cement 2%;
Wherein, Al in the alumina hollow ball
2O
3Content 〉=90wt%, Al in the mullite synthesizing
2O
3Content 〉=42 wt%, Al in the sintering plate corundum fine powder
2O
3Content 〉=99.5 wt%, the Al of multimodal Calcined polishing aluminum oxide micro mist
2O
3Content 〉=99.6wt%, active ρ-Al
2O
3The Al of micro mist
2O
3After content 99.8wt%(removes igloss), the Al of dispersed aluminum oxide
2O
3Content 80wt%, the Al of pure calcium aluminate cement
2O
3Content 73wt%; The mean particle size of multimodal Calcined polishing aluminum oxide micro mist is less than 0.02mm; Active ρ-Al
2O
3The mean particle size of micro mist is less than 0.005mm, adopts special method for calcinating to activate, and has good hydrophilic active.
(3) with calcining α-aluminum oxide micro mist, carbon fiber and 30% phosphoric acid solution preparation transition layer slurry, prepare by following part by weight:
Calcining α-aluminum oxide micro mist median size≤0.0012mm 74.8%;
The charcoal Fibre diameter is less than 0.01mm length≤1mm 0.2%;
30% phosphoric acid solution 25%;
First lightening casting material is cast in the bottom of building mould when (4) building, paves jolt ramming, until (about 30min) after the initial set, at the thick transition layer slurry of its surface brush 1-2mm, above again the corundum castable that stirs being cast in, pave jolt ramming.After its initial set (about 40min), cover with plastics film, and at 20 ℃ indoor maintenance 48h.
Lightening casting material first with the aglite water-wet, adds pure calcium aluminate cement and part powder when stirring again, more remaining powder and water is added stirring after stirring, to avoid the light material come-up.
Mould material is when stirring, and with clean tap water, 18 ℃ of water temperatures stir 22 ℃ of envrionment temperatures.Wherein the lightening casting material water consumption is 7.2wt%; The corundum castable water consumption is 4.8wt%.
(5) with the formulated complex gradient mould material of this example, make some standards and inert anode electrolyzer goods, use for analyzing and testing.Analyzing and testing the results are shown in following table.
Embodiment 3
(1) does tight zone with the pure corundum pouring material of self-control.Its comprehensive composition: Al
2O
3The total percentage composition of quality is greater than 98wt%, SiO
2Content is less than 0.05wt%, and CaO content is less than 1.5wt%, Na
2O content is less than 0.5wt%, Fe
2O
3Content is less than 0.1wt%.
(2) lightening casting material with alumina hollow ball, float pearl and the mullite synthesizing particle is done aggregate, each material is by following weight preparation.
Alumina hollow ball particle diameter 0-3mm 18%;
Float bead footpath 0-3mm 5%
Mullite synthesizing grain diameter 3-5mm 20%;
Mullite synthesizing grain diameter 1-3mm 14%;
Mullite synthesizing grain diameter 0-1mm 12%;
Sintering plate corundum fine powder particle diameter≤0.045mm 10%;
Magnesium-aluminium spinel fine powder particle diameter≤0.045mm 2%;
Multimodal Calcined polishing aluminum oxide micro mist 12%;
Dispersed alumina powder 1%;
Pure calcium aluminate cement 6%;
Wherein, Al in the alumina hollow ball
2O
3Content 〉=90wt% floats Al in the bead footpath
2O
3Content 〉=35wt%.Al in the mullite synthesizing
2O
3Content 〉=42 wt%, Al in the sintering plate corundum fine powder
2O
3Content 〉=99.5 wt%, magnesium-aluminium spinel Al
2O
3Content 〉=74wt%, the Al of multimodal Calcined polishing aluminum oxide micro mist
2O
3Content 〉=99.6wt%, the Al of dispersed aluminum oxide
2O
3Content 80wt%, the Al of pure calcium aluminate cement
2O
3Content 73wt%; The mean particle size of multimodal Calcined polishing aluminum oxide micro mist is less than 0.02mm; Active ρ-Al
2O
3The mean particle size of micro mist is less than 0.005mm, adopts special method for calcinating to activate, and has good hydrophilic active.
(3) with zirconium white micro mist, calcining α-aluminum oxide micro mist and water preparation transition layer slurry, prepare by following part by weight:
Zirconium white micro mist median size≤0.02mm 10%;
Calcining α-aluminum oxide micro mist median size≤0.0012mm 60%;
Phosphate dihydrogen aluminum solution 30%;
First lightening casting material is cast in the bottom of building mould when (4) building, paves jolt ramming, until (about 30min) after the initial set, at the thick transition layer slurry of its surface brush 1-2mm, above again the corundum castable that stirs being cast in, pave jolt ramming.After its initial set (about 40min), cover with plastics film, and at 20 ℃ indoor maintenance 48h.
Lightening casting material first with the aglite water-wet, adds pure calcium aluminate cement and part powder when stirring again, more remaining powder and water is added stirring after stirring, to avoid the light material come-up.
Mould material is when stirring, and with clean tap water, 18 ℃ of water temperatures stir 22 ℃ of envrionment temperatures.Wherein the lightening casting material water consumption is 5.8wt%; The corundum castable water consumption is 4.6wt%.
(5) with the formulated complex gradient mould material of this example, make some standards and inert anode electrolyzer goods, use for analyzing and testing.Analyzing and testing the results are shown in following table.
Embodiment 4
(1) does tight zone with the pure corundum pouring material of self-control.Its comprehensive composition: Al
2O
3The total percentage composition of quality is greater than 98wt%, SiO
2Content is less than 0.05wt%, and CaO content is less than 1.5wt%, Na
2O content is less than 0.5wt%, Fe
2O
3Content is less than 0.1wt%.
(2) lightening casting material with alumina hollow ball, float pearl and lightweight mullite synthesizing particle is done aggregate, each material is by following weight preparation.
Alumina hollow ball particle diameter 0-3mm 15%;
Float bead footpath 0-3mm 5%
Lightweight mullite synthesizing grain diameter 3-5mm 22%;
Lightweight mullite synthesizing grain diameter 1-3mm 14%;
Lightweight mullite synthesizing grain diameter 0-1mm 12%;
Sintering plate corundum fine powder particle diameter≤0.045mm 12%;
Magnesium-aluminium spinel fine powder particle diameter≤0.045mm 2%;
Multimodal Calcined polishing aluminum oxide micro mist 12%;
Active ρ alumina powder 1%;
Dispersed alumina powder 1%;
Pure calcium aluminate cement 4%;
Wherein, Al in the alumina hollow ball
2O
3Content 〉=90wt% floats Al in the bead footpath
2O
3Content 〉=35wt%.Al in the mullite synthesizing
2O
3Content 〉=42 wt%, Al in the sintering plate corundum fine powder
2O
3Content 〉=99.5 wt%, magnesium-aluminium spinel Al
2O
3Content 〉=74wt%, the Al of multimodal Calcined polishing aluminum oxide micro mist
2O
3Content 〉=99.6wt%, active ρ-Al
2O
3The Al of micro mist
2O
3After content 99.8wt%(removes igloss), the Al of dispersed aluminum oxide
2O
3Content 80wt%, the Al of pure calcium aluminate cement
2O
3Content 73wt%; The mean particle size of multimodal Calcined polishing aluminum oxide micro mist is less than 0.02mm; Active ρ-Al
2O
3The mean particle size of micro mist is less than 0.005mm, adopts special method for calcinating to activate, and has good hydrophilic active.
(3) with zirconium white micro mist, calcining α-aluminum oxide micro mist, yttrium oxide and water preparation transition layer slurry, prepare by following part by weight:
Zirconium white micro mist median size≤0.05mm 8%;
Calcining α-aluminum oxide micro mist median size≤0.0012mm 56%;
Yttrium oxide micro mist median size≤0.05mm 1%;
Pure water 35%;
First lightening casting material is cast in the bottom of building mould when (4) building, paves jolt ramming, until (about 30min) after the initial set, at the thick transition layer slurry of its surface brush 1-2mm, above again the corundum castable that stirs being cast in, pave jolt ramming.After its initial set (about 40min), cover with plastics film, and at 20 ℃ indoor maintenance 48h.
Lightening casting material first with the aglite water-wet, adds pure calcium aluminate cement and part powder when stirring again, more remaining powder and water is added stirring after stirring, to avoid the light material come-up.
Mould material is when stirring, and with clean tap water, 18 ℃ of water temperatures stir 22 ℃ of envrionment temperatures.Wherein the lightening casting material water consumption is 5.4wt%; The corundum castable water consumption is 4.6wt%.
(5) with the formulated complex gradient mould material of this example, make some standards and inert anode electrolyzer goods, use for analyzing and testing.Analyzing and testing the results are shown in following table.
Embodiment 5
(1) does tight zone with the pure corundum pouring material of self-control.Its comprehensive composition: Al
2O
3The total percentage composition of quality is greater than 98wt%, SiO
2Content is less than 0.05wt%, and CaO content is less than 1.5wt%, Na
2O content is less than 0.5wt%, Fe
2O
3Content is less than 0.1wt%.
(2) lightening casting material is done aggregate with alumina hollow ball and mullite synthesizing particle, and each material is by following weight preparation.
Alumina hollow ball particle diameter 0-3mm 20%;
Mullite synthesizing grain diameter 3-5mm 22%;
Mullite synthesizing grain diameter 1-3mm 14%;
Mullite synthesizing grain diameter 0-1mm 12%;
Sintering plate corundum fine powder particle diameter≤0.045mm 12%;
Magnesium-aluminium spinel fine powder particle diameter≤0.045mm 2%;
Multimodal Calcined polishing aluminum oxide micro mist 12%;
Active ρ alumina powder 1%;
Dispersed alumina powder 1%;
Pure calcium aluminate cement 4%;
Wherein, Al in the alumina hollow ball
2O
3Content 〉=90wt%, Al in the mullite synthesizing
2O
3Content 〉=42 wt%, Al in the sintering plate corundum fine powder
2O
3Content 〉=99.5 wt%, magnesium-aluminium spinel Al
2O
3Content 〉=74wt%, the Al of multimodal Calcined polishing aluminum oxide micro mist
2O
3Content 〉=99.6wt%, active ρ-Al
2O
3The Al of micro mist
2O
3After content 99.8wt%(removes igloss), the Al of dispersed aluminum oxide
2O
3Content 80wt%, the Al of pure calcium aluminate cement
2O
3Content 73wt%; The mean particle size of multimodal Calcined polishing aluminum oxide micro mist is less than 0.02mm; Active ρ-Al
2O
3The mean particle size of micro mist is less than 0.005mm, adopts special method for calcinating to activate, and has good hydrophilic active.
(3) with calcining α-aluminum oxide micro mist, yttrium oxide micro mist and water preparation transition layer slurry, prepare by following part by weight:
Calcining α-aluminum oxide micro mist median size≤0.0012mm 64%;
Yttrium oxide micro mist median size≤0.05mm 1%;
Pure water 35%;
First lightening casting material is cast in the bottom of building mould when (4) building, paves jolt ramming, until (about 30min) after the initial set, at the thick transition layer slurry of its surface brush 1-2mm, above again the corundum castable that stirs being cast in, pave jolt ramming.After its initial set (about 40min), cover with plastics film, and at 20 ℃ indoor maintenance 48h.
Lightening casting material first with the aglite water-wet, adds pure calcium aluminate cement and part powder when stirring again, more remaining powder and water is added stirring after stirring, to avoid the light material come-up.
Mould material is when stirring, and with clean tap water, 18 ℃ of water temperatures stir 22 ℃ of envrionment temperatures.Wherein the lightening casting material water consumption is 5.4wt%; The corundum castable water consumption is 4.6wt%.
(5) with the formulated complex gradient mould material of this example, make some standards and inert anode electrolyzer goods, use for analyzing and testing.Analyzing and testing the results are shown in following table.
Embodiment 6
(1) does tight zone with the pure corundum pouring material of self-control.Its comprehensive composition: Al
2O
3The total percentage composition of quality is greater than 98wt%, SiO
2Content is less than 0.05wt%, and CaO content is less than 1.5wt%, Na
2O content is less than 0.5wt%, Fe
2O
3Content is less than 0.1wt%.
(2) lightening casting material is done aggregate with alumina hollow ball and mullite synthesizing particle, and each material is by following weight preparation.
Alumina hollow ball particle diameter 0-3mm 18%;
Mullite synthesizing grain diameter 3-5mm 24%;
Mullite synthesizing grain diameter 1-3mm 14%;
Mullite synthesizing grain diameter 0-1mm 12%;
Sintering plate corundum fine powder particle diameter≤0.045mm 10%;
Magnesium-aluminium spinel fine powder particle diameter≤0.045mm 2%;
Multimodal Calcined polishing aluminum oxide micro mist 12%;
Active ρ alumina powder 1%;
Dispersed alumina powder 1%;
Pure calcium aluminate cement 6%;
Wherein, Al in the alumina hollow ball
2O
3Content 〉=90wt%, Al in the mullite synthesizing
2O
3Content 〉=42 wt%, Al in the sintering plate corundum fine powder
2O
3Content 〉=99.5 wt%, magnesium-aluminium spinel Al
2O
3Content 〉=74wt%, the Al of multimodal Calcined polishing aluminum oxide micro mist
2O
3Content 〉=99.6wt%, active ρ-Al
2O
3The Al of micro mist
2O
3After content 99.8wt%(removes igloss), the Al of dispersed aluminum oxide
2O
3Content 80wt%, the Al of pure calcium aluminate cement
2O
3Content 73wt%; The mean particle size of multimodal Calcined polishing aluminum oxide micro mist is less than 0.02mm; Active ρ-Al
2O
3The mean particle size of micro mist is less than 0.005mm, adopts special method for calcinating to activate, and has good hydrophilic active.
(3) with calcining α-aluminum oxide micro mist, sapphire whisker and water preparation transition layer slurry, prepare by following part by weight:
Calcining α-aluminum oxide micro mist median size≤0.0012mm 64.8%;
The polycrystalline alumina fiber diameter is less than 0.01mm length≤1mm 0.2%;
Pure water 35%;
First lightening casting material is cast in the bottom of building mould when (4) building, paves jolt ramming, until (about 30min) after the initial set, at the thick transition layer slurry of its surface brush 1-2mm, above again the corundum castable that stirs being cast in, pave jolt ramming.After its initial set (about 40min), cover with plastics film, and at 20 ℃ indoor maintenance 48h.
Lightening casting material first with the aglite water-wet, adds pure calcium aluminate cement and part powder when stirring again, more remaining powder and water is added stirring after stirring, to avoid the light material come-up.
Mould material is when stirring, and with clean tap water, 18 ℃ of water temperatures stir 22 ℃ of envrionment temperatures.Wherein the lightening casting material water consumption is 5.4wt%; The corundum castable water consumption is 4.6wt%.
(5) with the formulated complex gradient mould material of this example, make some standards and inert anode electrolyzer goods, use for analyzing and testing.Analyzing and testing the results are shown in following table.
Claims (10)
1. an inert anode aluminium cell is characterized in that with insulation and sealing material this material is included as the tight zone of corundum pouring material with becaming one successively, makes transition layer for the slurry of micro mist and slurries preparation, is the thermal insulation layer of lightening casting material.
2. according to claim 1 a kind of inert anode aluminium cell is with insulation and sealing material, it is characterized in that described corundum pouring material is to select a kind of in pure corundum pouring material, the corundum-magnesium-aluminium spinel matter mould material; Al in described corundum-magnesium-aluminium spinel matter mould material
2O
3With MgO gross weight content greater than 95%, SiO
2Content less than 0.1%, CaO content less than 1.5%, Na
2O content is less than 0.5%, Fe
2O
3Content is less than 0.1%.
3. according to claim 1 a kind of inert anode aluminium cell is with insulation and sealing material, it is characterized in that described lightening casting material selects hollow ball, mullite synthesizing as aggregate, adopt sintering plate corundum fine powder, magnesium-aluminium spinel fine powder, multimodal Calcined polishing aluminum oxide micro mist, ρ-alumina powder, dispersed alumina powder and pure calcium aluminate cement as matrix, evenly being mixed forms; The aggregate part by weight is 68%-72% in the described lightening casting material; The part by weight that matrix accounts for is 28%-32%; Hollow ball part by weight in the aggregate of described lightening casting material is 10%-35%; Its material is selected from alumina hollow ball, floats one or both combinations in the pearl; Alumina hollow ball particle diameter 0-3mm in the aggregate of described lightening casting material, Al
2O
3Content 〉=90wt%; Described bead footpath 0-3mm, the Al of floating
2O
3Content 〉=35wt%.
4. according to claim 1 a kind of inert anode aluminium cell is with insulation and sealing material, it is characterized in that the mullite synthesizing particle in the aggregate of described lightening casting material has different size-grade distribution; Wherein particle diameter is that the shared weight ratio of mullite synthesizing pellet of 3-6mm is 15%-26%; Particle diameter is that the shared weight ratio of the mullite synthesizing particulate material of 1-3mm is 12%-20%; Particle diameter is that the shared weight ratio of the mullite synthesizing particulate material of 0-1mm is 10%-16%; Al in the described mullite synthesizing particle
2O
3Content 〉=42 wt%.
5. according to claim 1 a kind of inert anode aluminium cell is characterized in that the matrix components of described lightening casting material comprises: particle diameter≤0.045mm sintering plate corundum fine powder 8%-12% with insulation and sealing material; Magnesium-aluminium spinel fine powder 0%-5%; Multimodal Calcined polishing aluminum oxide micro mist 5%-12%; Active ρ-Al2O3 micro mist 0%-7%; Dispersed alumina powder 1%; Pure calcium aluminate cement 2%-6%; In the matrix components of described lightening casting material, Al in the sintering plate corundum fine powder
2O
3Content 〉=99.5 wt%, magnesium-aluminium spinel fine powder Al
2O
3Content 〉=74wt%, the Al of multimodal Calcined polishing aluminum oxide micro mist
2O
3Content 〉=99.6wt%, active ρ-Al
2O
3The Al of micro mist
2O
3Content 99.8wt%, the Al of dispersed aluminum oxide
2O
3Content 80wt%, the Al of pure calcium aluminate cement
2O
3Content 73wt%; The mean particle size of described multimodal Calcined polishing aluminum oxide micro mist is less than 0.02mm; Described active ρ-Al
2O
3The mean particle size of micro mist is less than 0.005mm, adopts special method for calcinating to activate, and has good hydrophilic active.
6. according to claim 1 a kind of inert anode aluminium cell is characterized in that with insulation and sealing material described transition layer slurry is formulated by micro mist and slurries, and wherein micro mist quality percentage composition accounts for 65%-75%, and slurries quality percentage composition accounts for 25%-35%; Described micro mist is selected from one or more combinations in zirconium white, calcining α-aluminum oxide, the yttrium oxide; Described its median size of calcining α-aluminum oxide micro mist is less than 0.02mm; Described slurries are selected from a kind of in water, phosphate aqueous solution, the phosphate dihydrogen aluminum solution.
7. according to claim 1 a kind of inert anode aluminium cell is characterized in that adding in the described transition layer slurry fiber of 0%-0.2%, to increase the toughness of transition layer with insulation and sealing material; Described fiber is selected from one or more combinations in charcoal fiber, silicon carbide fiber, the sapphire whisker; Described Fibre diameter is less than 100um, and length is less than 1mm.
8. an inert anode aluminium cell is with the preparation method of insulation with sealing material, it is characterized in that its preparation process at first will be built as the lightening casting material of thermal insulation layer, jolt ramming in building mould, after it produces initial set, transition layer slurry on its external coating, being coated with the thickness that brushes the transition layer pulp layer is 1-2mm, after slurry is brushed evenly, to in building mould, build as the corundum pouring material of tight zone again, use the transition layer slurry, tight zone mould material and thermal insulation layer mould material are combined into one common maintenance moulding.
9. according to claim 1 a kind of inert anode aluminium cell is with the preparation method of insulation with sealing material, it is characterized in that its preparation process is that the insulated pouring material is built on the one side of building mould first, build the width that is separated out first the insulated pouring material in the mould by dividing plate, after the insulated pouring material is built complete and is produced initial set, dismantle and build dividing plate in the mould, the thick transition layer slurry of 1-2mm on the end face brush of insulation pouring material, slurry are built corundum pouring material and are finished after brushing evenly at the other side of building mould.
10. according to claim 1 a kind of inert anode aluminium cell is characterized in that with the preparation method of insulation with sealing material mould material is when construction is stirred, with clean tap water or pure water; Water temperature greater than 5 ℃ less than 25 ℃, the envrionment temperature of working-yard greater than 5 ℃ less than 25 ℃; Build complete after, maintenance 24-48 hours, the again demoulding and carry out drying and processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483901.1A CN102976774B (en) | 2012-11-26 | 2012-11-26 | Heat-insulating and sealing material for inert-anode aluminum electrolysis cell and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483901.1A CN102976774B (en) | 2012-11-26 | 2012-11-26 | Heat-insulating and sealing material for inert-anode aluminum electrolysis cell and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102976774A true CN102976774A (en) | 2013-03-20 |
| CN102976774B CN102976774B (en) | 2014-06-11 |
Family
ID=47851183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210483901.1A Active CN102976774B (en) | 2012-11-26 | 2012-11-26 | Heat-insulating and sealing material for inert-anode aluminum electrolysis cell and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102976774B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320817A (en) * | 2013-07-09 | 2013-09-25 | 中国铝业股份有限公司 | Preparation method of heat-preserving and sealing structure above hearth of inert electrode aluminum electrolyzing tank |
| CN103868349A (en) * | 2014-03-21 | 2014-06-18 | 索通发展股份有限公司 | Energy saving and emission reduction method of carbon anode baking furnace |
| CN106045534A (en) * | 2016-06-03 | 2016-10-26 | 宜兴新威利成耐火材料有限公司 | Magnesium aluminate spinel tin refractory castable |
| CN111995410A (en) * | 2020-08-24 | 2020-11-27 | 武汉钢铁集团耐火材料有限责任公司 | Lightweight moisturizing and heat-insulating pouring material for tundish cover and preparation method thereof |
| CN113943167A (en) * | 2021-12-02 | 2022-01-18 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
| CN115029736A (en) * | 2022-06-24 | 2022-09-09 | 中国铝业股份有限公司 | Aluminum electrolysis anode covering material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0343245A (en) * | 1989-07-12 | 1991-02-25 | Honda Motor Co Ltd | Heat insulating ceramic composite and preparation thereof |
| CN101392990A (en) * | 2008-10-05 | 2009-03-25 | 梁德安 | Method for producing high performance indefinite fire-resistant material charcoal calcining fire wall |
| CN102276263A (en) * | 2011-04-28 | 2011-12-14 | 河南鑫诚耐火材料股份有限公司 | Manufacturing method of seal cover for operation observation aperture on carbon calciner fire wall |
| CN202272968U (en) * | 2011-10-10 | 2012-06-13 | 河南省新密市青屏耐火材料有限责任公司 | Lining structure of aluminium electrolysis cell |
-
2012
- 2012-11-26 CN CN201210483901.1A patent/CN102976774B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0343245A (en) * | 1989-07-12 | 1991-02-25 | Honda Motor Co Ltd | Heat insulating ceramic composite and preparation thereof |
| CN101392990A (en) * | 2008-10-05 | 2009-03-25 | 梁德安 | Method for producing high performance indefinite fire-resistant material charcoal calcining fire wall |
| CN102276263A (en) * | 2011-04-28 | 2011-12-14 | 河南鑫诚耐火材料股份有限公司 | Manufacturing method of seal cover for operation observation aperture on carbon calciner fire wall |
| CN202272968U (en) * | 2011-10-10 | 2012-06-13 | 河南省新密市青屏耐火材料有限责任公司 | Lining structure of aluminium electrolysis cell |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320817A (en) * | 2013-07-09 | 2013-09-25 | 中国铝业股份有限公司 | Preparation method of heat-preserving and sealing structure above hearth of inert electrode aluminum electrolyzing tank |
| CN103868349A (en) * | 2014-03-21 | 2014-06-18 | 索通发展股份有限公司 | Energy saving and emission reduction method of carbon anode baking furnace |
| CN106045534A (en) * | 2016-06-03 | 2016-10-26 | 宜兴新威利成耐火材料有限公司 | Magnesium aluminate spinel tin refractory castable |
| CN111995410A (en) * | 2020-08-24 | 2020-11-27 | 武汉钢铁集团耐火材料有限责任公司 | Lightweight moisturizing and heat-insulating pouring material for tundish cover and preparation method thereof |
| CN113943167A (en) * | 2021-12-02 | 2022-01-18 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
| CN113943167B (en) * | 2021-12-02 | 2022-12-27 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
| CN115029736A (en) * | 2022-06-24 | 2022-09-09 | 中国铝业股份有限公司 | Aluminum electrolysis anode covering material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102976774B (en) | 2014-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102976774B (en) | Heat-insulating and sealing material for inert-anode aluminum electrolysis cell and preparation method thereof | |
| CN110746805B (en) | Coating for lithium ion battery anode material sintering saggar and preparation method thereof | |
| CN101723690B (en) | Self-flow castable for filling back seam of side wall of aluminium electrolytic bath | |
| CN108101558A (en) | Compound saggar, preparation method and applications | |
| CN103556184A (en) | Preparation method of all-wet nano NiFe2O4-NiO-Cu-Ni metal ceramic inert anode | |
| CN102344291A (en) | Amorphous refractory and corrosion resistant material for inert anode aluminum cells and manufacturing method thereof | |
| CN106631068A (en) | Bauxite-based homogenous corundum environment-friendly steel ladle base brick and preparation method | |
| CN110128119A (en) | Blast furnace main iron channel castable and processing method and the method for preparing main trough of blast furnace | |
| CN110207499A (en) | Anode material of lithium battery sintering saggar based on magnesium aluminate spinel colloidal sol and preparation method thereof | |
| CN106702431A (en) | Anti-oxidation coating for carbon anodes in aluminum electrolysis | |
| CN105622114B (en) | A kind of low density fire resistant fiber coating and preparation method thereof | |
| CN105272198B (en) | A kind of high-temperature corrosion-resistant coating material and its application method and application | |
| CN102815715B (en) | Method for producing electronic mica via artificial synthesis | |
| CN106365654B (en) | A kind of anti-lithium electric material erosion fire-clay crucible adding ZrN-SiAlON | |
| CN100532319C (en) | Mo-corundum ceramic material and low-temperature sintering method | |
| CN108017397A (en) | Refractory brick containing quartz sand and preparation method thereof | |
| CN102775170B (en) | Preparation method of choke block for aluminum electrolytic tank | |
| CN102419094A (en) | Method for preparing vertical intermediate-frequency furnace by integrally casting and compounding furnace pipe and thermal insulation layer | |
| CN102775114A (en) | Choke block for aluminum electrolytic bath | |
| CN106348773B (en) | A kind of anti-lithium electric material erosion fire-clay crucible adding SiAlON-AlN-TiN | |
| CN107963900A (en) | Compound saggar, preparation method and applications | |
| CN110511004A (en) | A kind of zinc tailings processing extraordinary chrome corundum brick and preparation method thereof | |
| CN113248269B (en) | Magnesia carbon brick added with composite binder and preparation method thereof | |
| CN102491753A (en) | TiB2 composite cathode material for aluminum electrolysis and preparation method thereof | |
| CN111892413B (en) | Special impermeable brick for aluminum electrolytic cell lining and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |