CN109365474A - A kind of method of process aluminum electrolytic waste and old cathode carbon block - Google Patents
A kind of method of process aluminum electrolytic waste and old cathode carbon block Download PDFInfo
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- CN109365474A CN109365474A CN201811216091.7A CN201811216091A CN109365474A CN 109365474 A CN109365474 A CN 109365474A CN 201811216091 A CN201811216091 A CN 201811216091A CN 109365474 A CN109365474 A CN 109365474A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 118
- 239000002699 waste material Substances 0.000 title claims abstract description 118
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 117
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 85
- 230000008569 process Effects 0.000 title claims abstract description 61
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 64
- 238000003723 Smelting Methods 0.000 claims abstract description 33
- 239000004411 aluminium Substances 0.000 claims abstract description 30
- 239000008188 pellet Substances 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 238000005453 pelletization Methods 0.000 claims description 2
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 238000011282 treatment Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000001514 detection method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000003672 processing method Methods 0.000 description 6
- 239000000571 coke Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- VDGJOQCBCPGFFD-UHFFFAOYSA-N oxygen(2-) silicon(4+) titanium(4+) Chemical compound [Si+4].[O-2].[O-2].[Ti+4] VDGJOQCBCPGFFD-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000009491 slugging Methods 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012272 crop production Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005111 flow chemistry technique Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 238000003682 fluorination reaction Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000320 mechanical mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- ZBZHVBPVQIHFJN-UHFFFAOYSA-N trimethylalumane Chemical compound C[Al](C)C.C[Al](C)C ZBZHVBPVQIHFJN-UHFFFAOYSA-N 0.000 description 1
- 230000003519 ventilatory effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to the harmless treatments of aluminium electroloysis waste cathode carbon block and reutilization technology field, more particularly to a kind of method of process aluminum electrolytic waste and old cathode carbon block, its process are as follows: utilize iron-smelting process process aluminum electrolytic waste and old cathode carbon block, the furnace charge of iron-smelting process includes pellet, sinter and aluminum electrolysis waste cathode carbon block；Wherein, in the furnace charge of iron-smelting process in terms of mass fraction, the content of pellet is 18~32 parts, and the content of sinter is 64~80 parts, and aluminum electrolysis waste cathode carbon block content is 0~6.4 part；In sinter in terms of 100 parts of mass units, contain 0~30 part of aluminum electrolysis waste cathode carbon block；The content of aluminum electrolysis waste cathode carbon block and the content of aluminum electrolysis waste cathode carbon block in iron-smelting process furnace charge are not 0 simultaneously in sinter.The present invention can be realized the innoxious development and utilization of waste and old cathode carbon block commercial scale of aluminium electroloysis generation.
Description
Technical field
The present invention relates to the harmless treatments of aluminium electroloysis waste cathode carbon block and reutilization technology field, and in particular to a kind of place
The method for managing aluminum electrolysis waste cathode carbon block.
Background technique
Aluminium Industry is the basic industry of national economy, and important function is played in current social development.At present I
State's aluminium yield occupies No. 1 in the world, more than 15,000,000 tons, and is still in the impetus of rapid growth.Meanwhile aluminium electroloysis is being given
While national economy brings a large amount of valuable aluminium ingots, pollution is also brought.
Up to the present waste and old cell lining amount adds up discharge amount up to more than 700 ten thousand tons, and the electrolytic aluminium factory in China is main
Using large prebaked cell for aluminum-reduction, electrolytic cell operation reaches its service life and must just carry out large repairs, electrolytic cell when overhaul
Liner will be replaced, and the material that whens these overhauls generates is known as overhaul waste residue or electrolytic cell waste liner etc..Wherein, maximum pollution
Source is exactly the waste and old cathode after overhaul.Fluoride and cyanide therein permeate the ground in water when waste and old cathode carbon block is stacked, dirty
Contaminate water source.In addition, also having very big harm to animals and plants around, balance of nature is influenced, makes crop production reduction, therefore must be subject to
It administers.
Metallic aluminium has become the important foundation material of the national economic development.But in aluminum smelting technology production process, due to
By the erosion of electrolyte, 1 ton of electrolytic aluminium of every production, it will generate the waste and old cathode carbon block of about 30kg, this becomes aluminium electroloysis row
Main solid pollutant in industry.As by this calculating, domestic electrolytic aluminium yield has reached 31,410,000 tons within 2015, generates waste and old
900,000 tons of cathode carbon pieces or more, enormous amount can not be ignored.
In the waste and old cathode carbon block that aluminium electroloysis generates, main component is carbon, ice crystal, sodium fluoride, aluminium oxide and fluorination
Aluminium and a small amount of aluminium carbide and sodium carbide.Current China's processing waste and old cathode carbon block mainly using stack or security landfill,
The methods of Chemical Decomposition.But charcoal accounts for 70% and high-graphitized in waste and old cathode carbon block, remaining is based on ice crystal
Electrolyte, be available resource.Therefore, the recycling of waste and old cathode carbon block has preferable development prospect.
However the prior art does not consider how effective energy conservation, emission reduction nearly all and reduces cost, aluminium electroloysis generates waste and old
Cathode carbon pieces are difficult to realize plant-scale development and utilization.
Summary of the invention
To solve problems of the prior art, the purpose of the present invention is to provide and a kind of waste and old yin of process aluminum electrolytic
The method of pole carbon block, the present invention can be realized the innoxious development and utilization of waste and old cathode carbon block commercial scale of aluminium electroloysis generation.
The technical solution adopted by the invention is as follows:
A kind of method of process aluminum electrolytic waste and old cathode carbon block, process are as follows: waste and old using iron-smelting process process aluminum electrolytic
Cathode carbon pieces, the furnace charge of iron-smelting process include pellet, sinter and aluminum electrolysis waste cathode carbon block；Wherein, iron-smelting process
In furnace charge in terms of mass fraction, the content of pellet is 18~32 parts, and the content of sinter is 64~80 parts, aluminum electrolysis waste yin
Pole carbon block content is 0~6.4 part；
In sinter in terms of 100 parts of mass units, contain 0~30 part of aluminum electrolysis waste cathode carbon block；
The content of aluminum electrolysis waste cathode carbon block and aluminum electrolysis waste cathode carbon block in iron-smelting process furnace charge in sinter
Content is not 0 simultaneously.
The partial size of iron-smelting process furnace charge is not more than 40mm.
The partial size of aluminum electrolysis waste cathode carbon block is not more than 3.0mm in sinter, is calculated in mass percent, grain in sinter
Diameter is that the content of the aluminum electrolysis waste cathode carbon block of 3mm is no less than aluminum electrolysis waste cathode carbon block gross mass in sinter
70%.
The basicity of the pellet is 0.36~0.69；In the pellet in terms of 100 parts of mass units, comprising: 49-60
Part the silica of Fe, 5-15 part, 4-12 parts of calcium oxide, 1-3 parts of aluminum oxide, the sulphur not higher than 0.07 part, no
Phosphorus and impurity higher than 0.035 part.
Not plus the basicity of the sinter of aluminum electrolysis waste cathode carbon block is 1.45~1.79, in terms of 100 parts of mass units, not
Add aluminum electrolysis waste cathode carbon block sinter include: 40-55 parts the calcium oxide of Fe, 10-20 part, 5-15 parts of titanium dioxide
Silicon, 1-3 parts of aluminum oxide, the sulphur not higher than 0.07 part, phosphorus and impurity not higher than 0.035 part.
In waste cathode of aluminum electrolytic cell carbon block in terms of 100 parts of mass units, comprising: the F of 40-60 parts C, 9-37 part, 4 parts
SiO2, 4-8.5 parts Al, 5-15 part Na, S and impurity not higher than 0.5 part.
When using iron-smelting process process aluminum electrolytic waste and old cathode carbon block, temperature increasing schedule are as follows: when temperature is less than 1200 DEG C, often
Minute increases 10 DEG C, loading 0.7kg/cm2；When temperature >=1200 DEG C, 5 DEG C are increased per minute, loading 1kg/cm2。
Compared with prior art, the invention has the following beneficial effects:
The method of process aluminum electrolytic waste and old cathode carbon block of the present invention utilizes iron-smelting process process aluminum electrolytic waste and old cathode carbon block,
Aluminum electrolysis waste cathode carbon block main component contained by the furnace charge of iron-smelting process of the present invention is carbon and has slugging work containing certain
Fluoride salt plays the role of carburetting, reduction, burning and slugging.It by means of the present invention can effectively harmless treatment aluminium
It is electrolysed waste and old cathode carbon block, and improves the resource utilization rate of aluminum electrolysis waste cathode carbon block.The present invention is by by aluminium electroloysis
Waste and old dangerous waste as blast furnace ironmaking raw material sinter or be directly added into the raw material of blast furnace, can be effective by thermal process
Fluoride in aluminum electrolysis waste cathode carbon block is transformed into blast furnace flue gas and neutralized and is entered in blast furnace slag, to effectively reduce fluorine
The harm of compound, and promote under blast furnace hot environment the decomposition of the cyanide in aluminum electrolysis waste cathode carbon block.This hair
The bright harmless treatment that aluminium electroloysis dangerous waste is reduced by the way that waste and old cathode carbon block to be added in blast-furnace equipment, also by aluminum electrolysis waste
Cathode carbon pieces are used as fuel, reducing agent and the carburant in blast furnace, and the recycling for promoting aluminium electroloysis danger solid waste recycles.
Detailed description of the invention
Fig. 1 aluminum electrolysis waste cathode carbon block treatment process route map of the present invention.
Specific embodiment
It is next with reference to the accompanying drawings and examples that the present invention is further illustrated.
Referring to Fig.1, the method for process aluminum electrolytic waste and old cathode carbon block of the invention, it is useless using iron-smelting process process aluminum electrolytic
Old cathode carbon pieces, the furnace charge of iron-smelting process include pellet, sinter and aluminum electrolysis waste cathode carbon block；Wherein, iron-smelting process
Furnace charge in terms of mass fraction, the content of pellet is 18~32 parts, and the content of sinter is 64~80 parts, aluminum electrolysis waste
Cathode carbon pieces content is 0~6.4 part；In sinter in terms of 100 parts of mass units, contain 0~30 part of aluminum electrolysis waste cathode
Carbon block；The content of the content of aluminum electrolysis waste cathode carbon block and aluminum electrolysis waste cathode carbon block in iron-smelting process furnace charge in sinter
It is not simultaneously 0.
Wherein, the partial size of iron-smelting process furnace charge is not more than 40mm；The partial size of aluminum electrolysis waste cathode carbon block is not in sinter
It greater than 3.0mm, is calculated in mass percent, partial size is that the content of the aluminum electrolysis waste cathode carbon block of 3mm is no less than burnt in sinter
Tie 70% of aluminum electrolysis waste cathode carbon block gross mass in mine；
The basicity of pellet is 0.36~0.69；In the pellet in terms of 100 parts of mass units, comprising: 49-60 parts
Fe, 5-15 parts of silica, 4-12 parts of calcium oxide, 1-3 parts of aluminum oxide, is not higher than the sulphur not higher than 0.07 part
0.035 part of phosphorus and impurity；
Not plus the basicity of the sinter of aluminum electrolysis waste cathode carbon block is 1.45~1.79, in terms of 100 parts of mass units, not
Add aluminum electrolysis waste cathode carbon block sinter include: 40-55 parts the calcium oxide of Fe, 10-20 part, 5-15 parts of titanium dioxide
Silicon, 1-3 parts of aluminum oxide, the sulphur not higher than 0.07 part, phosphorus and impurity not higher than 0.035 part；
In waste cathode of aluminum electrolytic cell carbon block in terms of 100 parts of mass units, comprising: the F of 40-60 parts C, 9-37 part, 4 parts
SiO2, 4-8.5 parts Al, 5-15 part Na, S and impurity not higher than 0.5 part.
The present invention is according to iron-smelting process, using aluminum electrolysis waste cathode carbon block as iron-smelting raw material, by iron-smelting process by aluminium
The harm element removal being electrolysed in waste and old cathode carbon block, to reach the harmless treatment and resource utilization of danger solid waste.This hair
It is bright using aluminum electrolysis waste cathode carbon block as sintering deposit raw material, blast furnace raw material, iron coke or Carbon Composite Iron Ore Hot Briquette, iron in iron-smelting process
Water packet pre-processes auxiliary material etc., is crushed to certain particle size and pretreatment, for iron-smelting process production (as shown in Figure 1).
Embodiment 1:
The method of the present embodiment process aluminum electrolytic waste and old cathode carbon block is to utilize iron-smelting process process aluminum electrolytic waste and old cathode
Carbon block, the charge composition (such as table 1) of iron-smelting process are directly added into 6.4 parts of aluminium electroloysis waste cathode carbon block of blast furnace, 18 parts of pelletizing
Mine, 75.6 parts of sinter；In sinter in terms of 100 parts of mass units, contain 0 part of aluminum electrolysis waste cathode carbon block.
The test method of the present embodiment follows the steps below:
(1) each raw material is crushed and is ground, aluminum electrolysis waste cathode carbon block is as sintering deposit raw material by granularity control
System is being not more than 3mm, is calculated in mass percent, and partial size is that the content of the aluminum electrolysis waste cathode carbon block of 3mm is many in sinter
The 70% of aluminum electrolysis waste cathode carbon block gross mass in sinter；Directly as blast furnace raw material (i.e. furnace charge) in the present embodiment
Granularity is controlled in 10-12.5mm, and moisture content is in 12% or less gross mass；Illustrate: due to the limitation of testing equipment size, originally
It invents in all embodiments, the granularity of blast furnace raw material is controlled in 10-12.5mm, and for practical iron-smelting process, blast furnace is former
The granularity of material is not more than 40mm；
(2) each step (1) processed raw material is weighed by the composition quality of raw material, then carries out artificial and mechanical mixture 10
~20 minutes, obtain mixed raw material；
(3) mixed raw material obtained by step (2) is packed into high purity graphite crucible, high purity graphite crucible inner mold size are as follows: diameter
48mm × height 180mm divides into the hole that 9 internal diameters are 8mm；Before mixed raw material is packed into high purity graphite crucible, first in bottom
The coke that granularity is 15-20mm is loaded onto, thickness 30mm is loaded on the mixed raw material 200 that granularity is 10-12.5mm on coke
Gram, the height of mixed raw material is 70-77mm；Coke layer 20mm is then covered on the bed of material, total material pillar height is 120mm-130mm；Wherein,
Coke used in experimentation of the embodiment of the present invention is the raw material of conventional blast furnace ironmaking.
(4) temperature increasing schedule increases 10 DEG C before 1200 DEG C, loading 0.7kg/cm per minute2；After 1200 DEG C, 5 are increased per minute
DEG C, loading 1kg/cm2.Ventilatory capacity are as follows: lead to nitrogen 1L/min before 700 DEG C, also Primordial Qi 8L/min, also Primordial Qi ingredient are led to after 700 DEG C
In press volume percent, contain 69% N2, 31% CO.It is cooling: after drippage, compression bar is above mentioned into 40mm, it is logical with 3L/min
It is cooling to enter nitrogen 30min.
(5) blast furnace raw material dropping performance parameter is measured.
The present embodiment is as shown in table 1 as the various performance parameters of blast furnace ironmaking raw material.
Embodiment 2:
The aluminum electrolysis waste cathode carbon block processing method that the present embodiment provides, based on the waste cathode carbon block for being directly added into blast furnace
5 parts, 25 parts of pellet, 70 parts of sinter includes 8% aluminum electrolysis waste cathode carbon of sinter gross mass in sinter
Block.
The detection method and application method of embodiment are same as Example 1.
The present embodiment is as shown in table 1 as the various performance parameters of blast furnace ironmaking raw material.
Embodiment 3:
The aluminum electrolysis waste cathode carbon block processing method that the present embodiment provides, based on the waste cathode carbon block for being directly added into blast furnace
4 parts, 32 parts of pellet, 64 parts of sinter includes 3% aluminum electrolysis waste cathode carbon of sinter gross mass in sinter
Block.
The detection method and application method of embodiment are same as Example 1.
The present embodiment is as shown in table 1 as the various performance parameters of blast furnace ironmaking raw material.
Embodiment 4:
The aluminum electrolysis waste cathode carbon block processing method that the present embodiment provides, based on 20 parts of pellet, 80 parts of sintering
Mine includes 20% aluminum electrolysis waste cathode carbon block of sinter gross mass in sinter.
The detection method and application method of embodiment are same as Example 1.
The present embodiment is as shown in table 1 as the various performance parameters of blast furnace ironmaking raw material.
Embodiment 5:
The aluminum electrolysis waste cathode carbon block processing method that the present embodiment provides, based on the waste cathode carbon block for being directly added into blast furnace
3 parts, 31 parts of pellet, 66 parts of sinter includes 15% aluminum electrolysis waste cathode of sinter gross mass in sinter
Carbon block.
The detection method and application method of embodiment are same as Example 1.
The present embodiment is as shown in table 1 as the various performance parameters of blast furnace ironmaking raw material.
Embodiment 6:
The aluminum electrolysis waste cathode carbon block processing method that the present embodiment provides, based on the waste cathode carbon block for being directly added into blast furnace
6 parts, 30 parts of pellet, 64 parts of sinter includes 10% aluminum electrolysis waste cathode of sinter gross mass in sinter
Carbon block.
The detection method and application method of embodiment are same as Example 1.
The present embodiment is as shown in table 1 as the various performance parameters of blast furnace ironmaking raw material.
Embodiment 7:
The aluminum electrolysis waste cathode carbon block processing method that the present embodiment provides, based on the waste cathode carbon block for being directly added into blast furnace
1 part, 32 parts of pellet, 67 parts of sinter includes 30% aluminum electrolysis waste cathode of sinter gross mass in sinter
Carbon block.
The detection method and application method of embodiment are same as Example 1.
The present embodiment is as shown in table 1 as the various performance parameters of blast furnace ironmaking raw material.
Table 1
In table, T10%To soften start temperature；TSFor melt starting temperature；Δ T is droplet temperature section, indicates soft heat layer
The thickness in the worst section of gas permeability；S is meltdrop characteristic index；TDTo start to drip temperature；ΔPmaxFor maximum differential pressure, the value pair
The highest pressure difference peak value occurred during mineral aggregate test is answered, mineral aggregate pressure drag maximum value in blast furnace is similar to.
As can be seen from Table 1, droplet temperature section is effectively reduced, is conducive to the gas permeability for promoting blast furnace, is conducive to mention
Increase the efficiency of furnace.Aluminum electrolysis waste cathode carbon block can effectively reduce the fusing point of raw material, and cathode carbon pieces additional amount is more, more
Reduce the fusion temperature of blast furnace raw material.Therefore according to experimental data, aluminum electrolysis waste carbon block as sintering deposit raw material not above
The 30% of sinter gross mass.Aluminum electrolysis waste carbon block is directly as blast furnace raw material, and additional amount is not above the total matter of blast furnace raw material
The 6.4% of amount.
As can be seen from Table 1, aluminium electroloysis waste cathode carbon block main component contains charcoal and fluoride, can effectively promote iron
Mobility, carburetting, reproducibility, fuel and the heat insulating ability of water, and there is good temperature raising to act on and change in sinter and molten iron aluminium
Slag effect.Be conducive to increase the solid waste of aluminium electrolysis process by iron-smelting process flow processing aluminum electrolysis waste cathode carbon block
Recycling and promoted aluminium electroloysis solid waste iron-smelting process process added value.
It should be noted that examples detailed above of the invention, only preferred embodiments of the invention, are not intended to limit the invention
Practical range, therefore all equivalent transformations done with content described in the claims in the present invention, should all be included in the claims in the present invention
Within the scope of.
Claims (7)
1. a kind of method of process aluminum electrolytic waste and old cathode carbon block, which is characterized in that waste and old using iron-smelting process process aluminum electrolytic
Cathode carbon pieces, the furnace charge of iron-smelting process include pellet, sinter and aluminum electrolysis waste cathode carbon block；Wherein, iron-smelting process
In furnace charge in terms of mass fraction, the content of pellet is 18~32 parts, and the content of sinter is 64~80 parts, aluminum electrolysis waste yin
Pole carbon block content is 0~6.4 part；
In sinter in terms of 100 parts of mass units, contain 0~30 part of aluminum electrolysis waste cathode carbon block；
The content of the content of aluminum electrolysis waste cathode carbon block and aluminum electrolysis waste cathode carbon block in iron-smelting process furnace charge in sinter
It is not simultaneously 0.
2. a kind of method of process aluminum electrolytic waste and old cathode carbon block according to claim 1, which is characterized in that iron-smelting process
The partial size of furnace charge is not more than 40mm.
3. a kind of method of process aluminum electrolytic waste and old cathode carbon block according to claim 1, which is characterized in that in sinter
The partial size of aluminum electrolysis waste cathode carbon block is not more than 3.0mm, is calculated in mass percent, and partial size is the aluminium electroloysis of 3mm in sinter
The content of waste and old cathode carbon block is no less than 70% of aluminum electrolysis waste cathode carbon block gross mass in sinter.
4. a kind of method of process aluminum electrolytic waste and old cathode carbon block according to claim 1, which is characterized in that the pelletizing
The basicity of mine is 0.36~0.69；In the pellet in terms of 100 parts of mass units, comprising: 49-60 parts Fe, 5-15 part
Silica, 4-12 parts of calcium oxide, 1-3 parts of aluminum oxide, the sulphur not higher than 0.07 part, the phosphorus not higher than 0.035 part
And impurity.
5. a kind of method of process aluminum electrolytic waste and old cathode carbon block according to claim 1, which is characterized in that not plus aluminium is electric
The basicity for solving the sinter of waste and old cathode carbon block is 1.45~1.79, in terms of 100 parts of mass units, not plus aluminum electrolysis waste cathode
The sinter of carbon block includes: the calcium oxide, 5-15 parts of silica, the three of 1-3 parts oxidations two of 40-55 parts Fe, 10-20 part
Aluminium, the sulphur not higher than 0.07 part, phosphorus and impurity not higher than 0.035 part.
6. a kind of method of process aluminum electrolytic waste and old cathode carbon block according to claim 1, which is characterized in that aluminium cell
In waste cathode carbon block in terms of 100 parts of mass units, comprising: the F, 4 parts of SiO of 40-60 parts C, 9-37 part2, 4-8.5 parts
Al, 5-15 parts of Na, S and impurity not higher than 0.5 part.
7. a kind of method of process aluminum electrolytic waste and old cathode carbon block according to claim 1, which is characterized in that utilize ironmaking
When process aluminum electrolysis waste cathode carbon block, temperature increasing schedule are as follows: when temperature is less than 1200 DEG C, increase 10 DEG C per minute, lotus
Weight is 0.7kg/cm2；When temperature >=1200 DEG C, 5 DEG C are increased per minute, loading 1kg/cm2。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449123A (en) * | 2019-07-24 | 2019-11-15 | 西安建筑科技大学 | A kind of sintering flue gas desulfurization denitration material and preparation method thereof |
| CN112108489A (en) * | 2020-08-31 | 2020-12-22 | 西安建筑科技大学 | High-temperature vacuum treatment method and treatment device for aluminum electrolysis waste cathode, carbon slag or silicon carbide brick and operation method thereof |
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| CN106636503A (en) * | 2016-11-10 | 2017-05-10 | 内蒙古包钢钢联股份有限公司 | Blast furnace burden |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449123A (en) * | 2019-07-24 | 2019-11-15 | 西安建筑科技大学 | A kind of sintering flue gas desulfurization denitration material and preparation method thereof |
| CN110449123B (en) * | 2019-07-24 | 2022-04-26 | 西安建筑科技大学 | Sintering flue gas desulfurization and denitrification material and preparation method thereof |
| CN112108489A (en) * | 2020-08-31 | 2020-12-22 | 西安建筑科技大学 | High-temperature vacuum treatment method and treatment device for aluminum electrolysis waste cathode, carbon slag or silicon carbide brick and operation method thereof |
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