CN102978659B - A kind of Deep method of comprehensive utilization of electrolytic cell overhaul slag - Google Patents
A kind of Deep method of comprehensive utilization of electrolytic cell overhaul slag Download PDFInfo
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Abstract
The invention discloses the Deep method of comprehensive utilization of a kind of electrolytic cell overhaul slag, it is characterized in that, electrolytic cell overhaul slag is sorted, respectively obtain electrolyte block, cathode bar, waste cathode carbon block, useless refractory brick, useless insulating brick, useless heat-insulating shield, give up to prick and stick with paste, and remaining mixing slag charge；The block of sorting being carried out water logging respectively, selects broken, water logging again after block, the block selected reclaims, remaining powder pulverizing, flotation, selects carbon dust therein, refractory material powder, and remaining powder makes metallurgical slag former.The fluoride salt being difficult in electrolytic cell overhaul slag remove is separated by the present invention, and the recycling that improve electrolytic cell overhaul slag is worth so that it is turns waste into wealth, it is achieved that electrolytic cell overhaul slag economy, pollution-free recovery, is inherently eliminated pollution hidden trouble.
Description
Technical field
The present invention relates to the Deep method of comprehensive utilization of a kind of electrolytic cell overhaul slag, belong to electrolytic cell overhaul slag processing technology field.
Background technology
Aluminium cell typically needs to carry out large repairs after using 4～5 years, and the average groove life of majority enterprise of China was at about 1500 days, and during overhaul, the waste liner of removing, is electrolytic cell overhaul slag, and this slag is contained within soluble fluoride.Slag from delining mainly includes waste cathode carbon block, useless refractory brick, pricks paste, useless insulating brick, refractory powder, fire mortar and useless heat-insulating shield etc..Its generation amount is about 30kg/t Al(relative number, becomes with groove length in age), whole nation electrolytic aluminium production capacity is more than 9,000,000 t/a at present, then slag from delining generation amount is at about 270,000 t/a.
Aluminum electrolysis uses fused salt electrolysis process.I.e. with aluminium oxide as raw material, with fluoride salt (cryolite, aluminium fluoride) as flux, during electrolysis production, a part of fluorine-containing electrolyte is absorbed by carbonaceous Pot Lining, then is diffused in other furnace building material.
" discriminating of hazardous waste judging standard corrosivity " (GB5085.1 1996) and " hazardous waste judging standard leaching characteristic identification " (GB5085.3 1996) just promulgated for 1996 according to country；Electrolytic cell overhaul slag belongs to hazardous solid waste because of absorption fluoride and a small amount of cyanide, if the most effectively comprehensively utilized and harmless treatment or store mishandling, soil and groundwater will exist the most potential pollution effect.
In prior art, as follows to the processing method of aluminium cell overhaul groove slag:
1, adding Calx in waste cathode carbon block to be allowed to react with electrolyte therein, obtain calcium fluoride, sodium fluoride and aluminium fluoride, make fluorine obtain solidifying to re-use, the charcoal of recovery is reused for manufacturing cathode material, but processing cost is the highest.
2, utilize cement kiln internal reaction temperature high, the conditions such as carbon block time of staying length on stream, making the harmful substance in waste cathode carbon block carry out decomposing displacement in hot environment, and be finally solidificated in clinker, the carbon in waste cathode carbon block reduces the consumption of coal as fuel simultaneously.But, use the shortcoming of the method the most clearly: fluorine has infringement to refractory brick, and fluorine easily enters air with fume emission and causes atmospheric pollution；In waste cathode carbon block, the content of sodium is high, can have an impact cement later strength.
3, Shandong Aluminum Plant began to utilize useless carbon block to add the replacement part anthracite use of alumina clinker calcining kiln as far back as nineteen eighty-two, although by state verification, obtains preferable effect, but can not accomplish big argument, high value added utilization.
4, the domestic and international research that useless SiC-Si3N4's refractory brick treatment technology gives up is substantially at blank.
5, the research recycled electrolytic aluminium fluorine-containing waste disposal industrial water both at home and abroad is substantially at blank.
The method of above-mentioned process electrolytic cell overhaul slag all because of can not argument, high value added utilization electrolytic cell overhaul slag greatly, it is achieved that commercial Application and few, cause most aluminium cell overhaul groove slag still to be thrown aside.
Electrolytic cell overhaul slag is either stored or fills, and will put into huge investment cost and operational and administrative expenses, and there is long-term potential pollution hidden danger.Therefore slag from delining is carried out harmless treatment, turned waste into wealth, be inherently eliminated pollution hidden trouble, be then optimal and final scheme.
Summary of the invention
It is an object of the invention to, it is provided that the Deep method of comprehensive utilization of a kind of electrolytic cell overhaul slag.After carbon, fluoride salt, electrolyte, insulation material, refractory material separation in overhaul groove slag, purifying, become the raw material meeting commercial Application standard, for improving the comprehensive utilization of overhaul groove slag, eliminate environmental pollution, economize the land resource, and form the utilization of big argument, high added value.
Technical scheme.The Deep method of comprehensive utilization of electrolytic cell overhaul slag, comprises the steps:
A, electrolytic cell overhaul slag is sorted, respectively obtain electrolyte block, cathode bar, waste cathode carbon block, useless refractory brick, useless insulating brick, useless heat-insulating shield, useless bundle are stuck with paste, and remaining mixing slag charge；
B, waste cathode carbon block is carried out water logging, obtain soaking the powder scattered and block, block therein is selected, the block selected is passed through broken, water logging again, again selects block therein after drying as the aggregate making cathode carbon pieces, remaining powder carries out pulverizing process, then flotation, obtains carbon dust；The cathode carbon pieces aggregate of gained and carbon dust, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtains highly purified carbon materials；
C, useless refractory brick are alumina firebrick, alumina firebrick is carried out water logging, obtain soaking the powder scattered and block, block being selected, the block selected is passed through broken, water logging again, select block, reclaiming as the aggregate making refractory brick after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
Useless refractory brick is silicon-carbide-silicon nitride refractory brick, silicon-carbide-silicon nitride refractory brick is carried out water logging, obtain soaking the powder scattered and block, block therein is selected, the block selected is by broken, water logging again, again selecting the block therein aggregate as making refractory brick, remaining powder carries out pulverizing process, then flotation, obtain refractory brick powder, the refractory brick aggregate of gained and powder, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, sodium fluoride therein is gasified, obtains highly purified refractory brick material；
D, useless insulating brick or useless heat-insulating shield are carried out water logging respectively, obtain soaking the powder scattered and block, block is selected, the block selected is by broken, water logging again, selects block, reclaims respectively as the aggregate making insulating brick or heat-insulating shield after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
E, mixing slag charge being carried out pulverizing process, then flotation, select carbon dust therein, refractory material powder, remaining powder makes metallurgical slag former.
The Deep method of comprehensive utilization of above-mentioned electrolytic cell overhaul slag, described step b is, waste cathode carbon block is carried out water logging 2-3 days, obtains soaking the powder scattered and block, the particle diameter block more than 1-5 centimetre is selected, the block selected, by being crushed to particle diameter 0.5-2 centimetre, again water logging, selects the particle diameter block more than 0.3-1 centimetre, after drying as the aggregate making cathode carbon pieces, remaining powder carries out pulverizing, flotation, obtains carbon dust.
The Deep method of comprehensive utilization of above-mentioned electrolytic cell overhaul slag, described step c is, useless refractory brick is useless alumina firebrick, useless alumina firebrick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 1-5 centimetre is selected, the block selected is by being crushed to particle diameter 0.5-2 centimetre, water logging again, select the particle diameter block more than 0.3-1 centimetre, reclaiming as the aggregate making refractory brick after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
Useless refractory brick is silicon-carbide-silicon nitride refractory brick, silicon-carbide-silicon nitride refractory brick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 1-5 centimetre is selected, the block selected is by being crushed to particle diameter 0.5-2 centimetre, water logging again, again select the particle diameter block more than 0.3-1 centimetre as the aggregate making refractory brick, remaining powder carries out pulverizing process, flotation again, obtain refractory brick powder, the refractory brick aggregate of gained and powder, by after drying, high-temperature calcination is carried out at 1700-1900 DEG C, sodium fluoride therein is gasified, obtain highly purified refractory brick material.
The Deep method of comprehensive utilization of above-mentioned electrolytic cell overhaul slag, in described step d, useless insulating brick or useless heat-insulating shield are carried out water logging 2-3 days respectively, obtain soaking the powder scattered and block, the particle diameter block more than 1-5 centimetre is selected, the block selected is by being crushed to particle diameter 0.5-2 centimetre, water logging again, select the particle diameter block more than 0.3-1 centimetre, reclaim respectively as the aggregate making useless insulating brick or useless heat-insulating shield after drying, remaining powder carries out pulverizing process, makes metallurgical slag former.
The Deep method of comprehensive utilization of above-mentioned electrolytic cell overhaul slag, useless bundle in described step a is stuck with paste, processed by pulverizing, then flotation, select carbon dust therein, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtain highly purified carbon materials.
The Deep method of comprehensive utilization of above-mentioned electrolytic cell overhaul slag, being reclaimed by reverse osmosis water treatment system with water in described each step, the clear water of isolated recycles, and the high fluorine residue obtained makes metallurgical slag former.
For electrolytic cell overhaul slag, as a example by the 160KA pre-baking tank of certain electrolytic aluminium factory, in slag from delining, all kinds of materials composition situation is shown in Table 1.
Table 1
160KA pre-baking tank slag from delining composition situation
Wherein, the main component that cathode carbon pieces, bundle are stuck with paste is carbon, and refractory brick is divided into again alumina firebrick and SiC-Si3N4Composite fireproof brick, also the insulating brick of in bulk and heat-insulating shield etc. can sort out.Meanwhile, electrolytic cell overhaul slag also has a small amount of electrolyte and cathode bar, is recoverable after sorting out.The method of the present invention, first pass through preliminary sorting, obtain various block, then pass through water logging, owing to fluoride salt can be soluble in water, and adsorb fluoride salt (sodium fluoride is main) high block and will soak and scatter, remaining block absorption fluoride salt is low, sorting residue block again broken, soak after, highly purified block can be obtained, such as cathode carbon pieces material, refractory brick block, insulating brick block and heat-insulating shield block etc., economic worth can be improve as the aggregate of various products.For remaining powder, cathode carbon pieces and the useless powder stuck with paste of pricking by ball milling, after flotation, it is possible to obtain carbon dust, then calcine through electric furnace high-temperature, obtain high-purity carbon raw, remain various fluorine-containing slag charge and can make replacement CaF2Metallurgical slag former.For during recycling with water, reclaimed by reverse osmosis water treatment system, the clear water of isolated recycles, and the high fluorine residue obtained makes metallurgical slag former, it is achieved the recycling of industrial water.Invention carries out harmless resource utilization advanced treating to electrolytic cell overhaul slag, use advanced Technology and measure, the fluoride salt being difficult in electrolytic cell overhaul slag remove is separated, the recycling that improve electrolytic cell overhaul slag is worth, make it turn waste into wealth, achieve electrolytic cell overhaul slag economy, pollution-free recovery, be inherently eliminated pollution hidden trouble.The Technology of the present invention can turn waste into wealth, and energy consumption is low, does not has secondary pollution problem in production process, it is achieved that itself clean produces, and is suitable for the big argument of electrolytic cell overhaul slag, the utilization of high added value.
Detailed description of the invention
Embodiments of the invention 1.The Deep method of comprehensive utilization of electrolytic cell overhaul slag, comprises the steps:
A, electrolytic cell overhaul slag is sorted, respectively obtain electrolyte block, cathode bar, waste cathode carbon block, useless refractory brick, useless insulating brick, useless heat-insulating shield, useless bundle are stuck with paste, and remaining mixing slag charge.Wherein, electrolyte block is mainly aluminum, can directly be recovered to electrolytic aluminium factory, and cathode bar is iron staff, it is possible to directly reclaim.
B, waste cathode carbon block being carried out water logging, fluoride salt is soluble in water, and the cathode carbon pieces having adsorbed fluoride salt can scatter, obtain soaking the powder scattered and block, block therein being selected, the fluoride salt of the block absorption selected is few, by the block selected by crushing, water logging again, removing fluoride salt further, again select block therein after drying as the aggregate of making cathode carbon pieces, remaining powder carries out pulverizing process, flotation again, obtains carbon dust.The cathode carbon pieces aggregate of gained and carbon dust, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtains highly purified carbon materials.
C, useless refractory brick are alumina firebrick, alumina firebrick is carried out water logging, and the alumina firebrick having adsorbed fluoride salt can scatter, and obtains soaking the powder scattered and block, block is selected, the fluoride salt of the block absorption selected is few, by again crushing, and water logging again, select block, reclaiming as the aggregate making refractory brick after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
Useless refractory brick is silicon-carbide-silicon nitride refractory brick, owing to silicon-carbide-silicon nitride refractory brick is worth higher, the recovery process of cathode blocks in step b can be used to process, specific as follows, silicon-carbide-silicon nitride refractory brick is carried out water logging, obtain soaking the powder scattered and block, block therein is selected, the block selected is by broken, water logging again, again select block therein as the aggregate making refractory brick, remaining powder carries out pulverizing process, flotation again, obtain refractory brick powder, the refractory brick aggregate of gained and powder, by after drying, high-temperature calcination is carried out at 1700-1900 DEG C, sodium fluoride therein is gasified, obtain highly purified refractory brick material.
D, useless insulating brick or useless heat-insulating shield are carried out water logging respectively, obtain soaking the powder scattered and block, block is selected, the block selected is by broken, water logging again, selects block, reclaims respectively as the aggregate making insulating brick or heat-insulating shield after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
E, mixing slag charge being carried out pulverizing process, then use existing floatation process, select carbon dust therein, refractory material powder, remaining powder makes metallurgical slag former.The carbon dust floatingly selected can pass through high-temperature calcination, obtains highly purified carbon dust.
Useless bundle is stuck with paste, can be processed by pulverizing, then flotation, select carbon dust therein, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtain highly purified carbon materials.
Use water in each step of present invention process, is reclaimed by reverse osmosis water treatment system, and the clear water of isolated recycles, the high fluorine residue obtained, and makes metallurgical slag former together with the powder obtained before.
Embodiments of the invention 2.The Deep method of comprehensive utilization of electrolytic cell overhaul slag, comprises the steps:
A, electrolytic cell overhaul slag is sorted, respectively obtain electrolyte block, cathode bar, waste cathode carbon block, useless refractory brick, useless insulating brick, useless heat-insulating shield, useless bundle are stuck with paste, and remaining mixing slag charge.
B, waste cathode carbon block is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 5 centimetres is selected, the block selected, by being crushed to particle diameter 2 centimetres, water logging again, selects the particle diameter block more than 1 centimetre, as the aggregate making cathode carbon pieces, remaining powder carries out pulverizing, flotation, obtains carbon dust.The cathode carbon pieces aggregate of gained and carbon dust, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtains highly purified carbon materials.
C, useless refractory brick are useless alumina firebrick, useless alumina firebrick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 1-5 centimetre being selected, the block selected is by being crushed to particle diameter 0.5-2 centimetre, again water logging, select the particle diameter block more than 0.3-1 centimetre, reclaiming as the aggregate making refractory brick after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
Useless refractory brick is silicon-carbide-silicon nitride refractory brick, silicon-carbide-silicon nitride refractory brick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 1-5 centimetre is selected, the block selected is by being crushed to particle diameter 0.5-2 centimetre, water logging again, again select the particle diameter block more than 0.3-1 centimetre as the aggregate making refractory brick, remaining powder carries out pulverizing process, flotation again, obtain refractory brick powder, the refractory brick aggregate of gained and powder, by after drying, high-temperature calcination is carried out at 1700-1900 DEG C, sodium fluoride therein is gasified, obtain highly purified refractory brick material.
D, useless insulating brick or useless heat-insulating shield are carried out water logging respectively, obtain soaking the powder scattered and block, block is selected, the block selected is by broken, water logging again, selects block, reclaims respectively as the aggregate making insulating brick or heat-insulating shield after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
E, mixing slag charge being carried out pulverizing process, then use existing floatation process, select carbon dust therein, refractory material powder, remaining powder makes metallurgical slag former.
Useless bundle is stuck with paste, can be processed by pulverizing, then flotation, select carbon dust therein, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtain highly purified carbon materials.
Use water in above steps, is reclaimed by reverse osmosis water treatment system, and the clear water of isolated recycles, the high fluorine residue obtained, and makes metallurgical slag former together with the powder obtained before.
Embodiments of the invention 3.The Deep method of comprehensive utilization of electrolytic cell overhaul slag, comprises the steps:
A, electrolytic cell overhaul slag is sorted, respectively obtain electrolyte block, cathode bar, waste cathode carbon block, useless refractory brick, useless insulating brick, useless heat-insulating shield, useless bundle are stuck with paste, and remaining mixing slag charge.
B, waste cathode carbon block is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 1 centimetre is selected, the block selected, by being crushed to particle diameter 0.5 centimetre, water logging again, selects the particle diameter block more than 0.3 centimetre, after drying as the aggregate making cathode carbon pieces, remaining powder carries out pulverizing, flotation, obtains carbon dust.The cathode carbon pieces aggregate of gained and carbon dust, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtains highly purified carbon materials.
C, useless refractory brick are useless alumina firebrick, useless alumina firebrick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 1 centimetre being selected, the block selected is by being crushed to particle diameter 0.5 centimetre, water logging again, select the particle diameter block more than 0.3 centimetre, reclaiming as the aggregate making refractory brick after drying, remaining powder carries out pulverizing process, makes metallurgical slag former.
When useless refractory brick is silicon-carbide-silicon nitride refractory brick, owing to silicon-carbide-silicon nitride refractory brick is worth higher, the recovery process of cathode blocks in step b can be used to process, specific as follows, silicon-carbide-silicon nitride refractory brick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 1 centimetre is selected, the block selected is by being crushed to particle diameter 0.5 centimetre, water logging again, again select the particle diameter block more than 0.3 centimetre after drying as the aggregate making refractory brick, remaining powder carries out pulverizing process, flotation again, obtain refractory brick powder.Obtain refractory brick powder, the refractory brick aggregate of gained and powder, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, sodium fluoride therein is gasified, obtain highly purified refractory brick material.
D, useless insulating brick or useless heat-insulating shield are carried out water logging respectively, obtain soaking the powder scattered and block, block is selected, the block selected is by broken, water logging again, selects block, reclaims respectively as the aggregate making insulating brick or heat-insulating shield after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
E, mixing slag charge being carried out pulverizing process, then use existing floatation process, select carbon dust therein, refractory material powder, remaining powder makes metallurgical slag former.
Use water in above steps, is reclaimed by reverse osmosis water treatment system, and the clear water of isolated recycles, the high fluorine residue obtained, and makes metallurgical slag former together with the powder obtained before.
Embodiments of the invention 4.The Deep method of comprehensive utilization of electrolytic cell overhaul slag, comprises the steps:
A, electrolytic cell overhaul slag is sorted, respectively obtain electrolyte block, cathode bar, waste cathode carbon block, useless refractory brick, useless insulating brick, useless heat-insulating shield, useless bundle are stuck with paste, and remaining mixing slag charge.
B, waste cathode carbon block is carried out water logging 2 days, obtain soaking the powder scattered and block, the particle diameter block more than 3 centimetres is selected, the block selected, by being crushed to particle diameter 1 centimetre, water logging again, selects the particle diameter block more than 0.6 centimetre, after drying as the aggregate making cathode carbon pieces, remaining powder carries out pulverizing, flotation, obtains carbon dust.The cathode carbon pieces aggregate of gained and carbon dust, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtains highly purified carbon materials.
C, useless refractory brick are useless alumina firebrick, useless alumina firebrick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 3 centimetres being selected, the block selected is by being crushed to particle diameter 1 centimetre, water logging again, select the particle diameter block more than 0.6 centimetre, reclaiming as the aggregate making refractory brick after drying, remaining powder carries out pulverizing process, makes metallurgical slag former.
When useless refractory brick is silicon-carbide-silicon nitride refractory brick, owing to silicon-carbide-silicon nitride refractory brick is worth higher, the recovery process of cathode blocks in step b can be used to process, specific as follows, silicon-carbide-silicon nitride refractory brick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 3 centimetres is selected, the block selected is by being crushed to particle diameter 1 centimetre, water logging again, again select the particle diameter block more than 0.6 centimetre after drying as the aggregate making refractory brick, remaining powder carries out pulverizing process, flotation again, obtain refractory brick powder.Obtain refractory brick powder, the refractory brick aggregate of gained and powder, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, sodium fluoride therein is gasified, obtain highly purified refractory brick material.
D, useless insulating brick or useless heat-insulating shield are carried out water logging respectively, obtain soaking the powder scattered and block, block is selected, the block selected is by broken, water logging again, selects block, reclaims respectively as the aggregate making insulating brick or heat-insulating shield after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
E, mixing slag charge being carried out pulverizing process, then use existing floatation process, select carbon dust therein, refractory material powder, remaining powder makes metallurgical slag former.
Use water in above steps, is reclaimed by reverse osmosis water treatment system, and the clear water of isolated recycles, the high fluorine residue obtained, and makes metallurgical slag former together with the powder obtained before.
Claims (6)
1. the Deep method of comprehensive utilization of an electrolytic cell overhaul slag, it is characterised in that: comprise the steps:
A, electrolytic cell overhaul slag is sorted, respectively obtain electrolyte block, cathode bar, waste cathode carbon block, useless refractory brick, useless insulating brick, useless heat-insulating shield, useless bundle are stuck with paste, and remaining mixing slag charge；
B, waste cathode carbon block is carried out water logging, obtain soaking the powder scattered and block, block therein is selected, the block selected is passed through broken, water logging again, again selects block therein after drying as the aggregate making cathode carbon pieces, remaining powder carries out pulverizing process, then flotation, obtains carbon dust；The cathode carbon pieces aggregate of gained and carbon dust, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtains highly purified carbon materials；
C, useless refractory brick are alumina firebrick, alumina firebrick is carried out water logging, obtain soaking the powder scattered and block, block being selected, the block selected is passed through broken, water logging again, select block, reclaiming as the aggregate making refractory brick after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
Useless refractory brick is silicon-carbide-silicon nitride refractory brick, silicon-carbide-silicon nitride refractory brick is carried out water logging, obtain soaking the powder scattered and block, block therein is selected, the block selected is by broken, water logging again, again selecting the block therein aggregate as making refractory brick, remaining powder carries out pulverizing process, then flotation, obtain refractory brick powder, the refractory brick aggregate of gained and powder, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, sodium fluoride therein is gasified, obtains highly purified refractory brick material；
D, useless insulating brick or useless heat-insulating shield are carried out water logging respectively, obtain soaking the powder scattered and block, block is selected, the block selected is by broken, water logging again, selects block, reclaims respectively as the aggregate making insulating brick or heat-insulating shield after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
E, mixing slag charge being carried out pulverizing process, then flotation, select carbon dust therein, refractory material powder, remaining powder makes metallurgical slag former.
The Deep method of comprehensive utilization of electrolytic cell overhaul slag the most according to claim 1, it is characterized in that: described step b is, waste cathode carbon block is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 5 centimetres is selected, the block selected, by being crushed to particle diameter 0.5-2 centimetre, again water logging, selects the particle diameter block more than 1 centimetre, after drying as the aggregate making cathode carbon pieces, remaining powder carries out pulverizing, flotation, obtains carbon dust.
The Deep method of comprehensive utilization of electrolytic cell overhaul slag the most according to claim 1, it is characterized in that: described step c is, useless refractory brick is useless alumina firebrick, useless alumina firebrick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 5 centimetres is selected, the block selected is by being crushed to particle diameter 0.5-2 centimetre, water logging again, select the particle diameter block more than 1 centimetre, reclaiming as the aggregate making refractory brick after drying, remaining powder carries out pulverizing process, makes metallurgical slag former；
Useless refractory brick is silicon-carbide-silicon nitride refractory brick, silicon-carbide-silicon nitride refractory brick is carried out water logging 2-3 days, obtain soaking the powder scattered and block, the particle diameter block more than 5 centimetres is selected, the block selected is by being crushed to particle diameter 0.5-2 centimetre, water logging again, again select the particle diameter block more than 1 centimetre as the aggregate making refractory brick, remaining powder carries out pulverizing process, flotation again, obtain refractory brick powder, the refractory brick aggregate of gained and powder, by after drying, high-temperature calcination is carried out at 1700-1900 DEG C, sodium fluoride therein is gasified, obtain highly purified refractory brick material.
The Deep method of comprehensive utilization of electrolytic cell overhaul slag the most according to claim 1, it is characterized in that: in described step d, useless insulating brick or useless heat-insulating shield are carried out water logging 2-3 days respectively, obtain soaking the powder scattered and block, the particle diameter block more than 5 centimetres is selected, the block selected is by being crushed to particle diameter 0.5-2 centimetre, water logging again, select the particle diameter block more than 1 centimetre, reclaim respectively as the aggregate making useless insulating brick or useless heat-insulating shield after drying, remaining powder carries out pulverizing process, makes metallurgical slag former.
The Deep method of comprehensive utilization of electrolytic cell overhaul slag the most according to claim 1, it is characterized in that: the useless bundle in described step a is stuck with paste, processed by pulverizing, then flotation, select carbon dust therein, by after drying, carry out high-temperature calcination at 1700-1900 DEG C, by sodium fluoride therein, sulfur gasification, obtain highly purified carbon materials.
6. according to the Deep method of comprehensive utilization of the electrolytic cell overhaul slag described in any one of claim 1-5, it is characterized in that: being reclaimed by reverse osmosis water treatment system with water in described each step, the clear water of isolated recycles, and the high fluorine residue obtained makes metallurgical slag former.
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