CN104174861A - Comprehensive recycling process of second zinc oxide rotary kiln tailings and production line of comprehensive recycling process - Google Patents
Comprehensive recycling process of second zinc oxide rotary kiln tailings and production line of comprehensive recycling process Download PDFInfo
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- CN104174861A CN104174861A CN201410324243.0A CN201410324243A CN104174861A CN 104174861 A CN104174861 A CN 104174861A CN 201410324243 A CN201410324243 A CN 201410324243A CN 104174861 A CN104174861 A CN 104174861A
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 70
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 230000008569 process Effects 0.000 title abstract description 51
- 238000004064 recycling Methods 0.000 title abstract description 9
- 238000007885 magnetic separation Methods 0.000 claims abstract description 77
- 238000000498 ball milling Methods 0.000 claims abstract description 45
- 239000006148 magnetic separator Substances 0.000 claims abstract description 40
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 23
- 239000001257 hydrogen Substances 0.000 claims abstract description 23
- 238000012216 screening Methods 0.000 claims abstract description 23
- 230000018044 dehydration Effects 0.000 claims abstract description 11
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 11
- 238000005265 energy consumption Methods 0.000 claims abstract description 10
- 238000004806 packaging method and process Methods 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 133
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 95
- 230000005484 gravity Effects 0.000 claims description 31
- 230000001376 precipitating effect Effects 0.000 claims description 29
- 229910052742 iron Inorganic materials 0.000 claims description 26
- 239000002893 slag Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 18
- 125000004122 cyclic group Chemical group 0.000 claims description 17
- 238000013467 fragmentation Methods 0.000 claims description 15
- 238000006062 fragmentation reaction Methods 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 11
- 238000009461 vacuum packaging Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 239000003818 cinder Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract 4
- 238000006722 reduction reaction Methods 0.000 abstract 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 11
- 239000011449 brick Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000007654 immersion Methods 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 235000012054 meals Nutrition 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 241000707825 Argyrosomus regius Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 206010023126 Jaundice Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
The invention discloses a comprehensive recycling process of second zinc oxide rotary kiln tailings and a production line of the comprehensive recycling proces. The process comprises the following steps of screening, crushing, dry magnetic separation, ball milling, magnetic separation, reselection, ball milling, magnetic separation, reselection, dehydration, reduction, screening and packaging. The production line of the comprehensive recycling process of the second zinc oxide rotary kiln tailings comprises a discharge bin, a vibrating screen, a vertical hammer crusher, a magnetic separation belt, a first single-bin ball mill, a first wet type half counter-current magnetic separator, a first precipitation type classifier, a second single-bin ball mill, a second wet type half counter-current magnetic separator, a second precipitation type classifier, a vibrating dehydrator, a drying kiln, a rotary type hydrogen reducing furnace, a three-dimensional vibrating screen and another discharge bin, wherein the discharge bin, the vibrating screen, the vertical hammer crusher, the magnetic separation belt, the first single-bin ball mill, the first wet type half counter-current magnetic separator, the first precipitation type classifier, the second single-bin ball mill, the second wet type half counter-current magnetic separator, the second precipitation type classifier, the vibrating dehydrator, the drying kiln, the rotary type hydrogen reducing furnace, the three-dimensional vibrating screen and the other discharge bin are arranged in sequence. The comprehensive recycling process and the production line of the comprehensive recycling process have the advantages of energy conservation and emission reduction, resource recycling is realized, energy consumption and manpower are effectively reduced, and the product quality is increased.
Description
Technical field
The present invention relates to firing equipment, refer in particular to a kind of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique.
Background technology
The existing whole nation produces secondary zinc oxide enterprise 140 left and right, the annual zinc oxide slag producing has more than 6,000,000 tons, although each the zinc oxide enterprise all waste residue to oneself in various degree processes, because of technical matters reason, the processing of waste residue is not accomplished to eat the dry net benefit of squeezing and maximize.The present invention can carry out the degree of depth to zinc oxide waste residue and utilize efficiently, big upgrade resource utilization and economic benefit.The major metal composition of zinc oxide slag is Fe, the content of Fe is greatly about 20%--30%, the processing main flow technique of existing domestic zinc oxide slag is: ball milling---magnetic separation, the product of this explained hereafter is iron fine powder, its iron content is 50%---between 70%, because of its metal Ferrum content large percentage, so there is the phenomenon of jaundice caking, steel plant are not generally directly used, and product price is cheap.Also some producer carries out landfill disposal, not only there is no economic benefit, also needs to drop into great amount of cost.Existing zinc oxide slag treatment process, because its product price is cheap, so substantially do not bring benefits, or only has meagre profit not recycle thoroughly cadmia.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, a kind of energy-conservation energy-saving and emission-reduction are provided, realize resource circulation utilization, effectively reduce energy consumption, manually, and the secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique and the produce line thereof that improve the quality of products.
The technical scheme that the present invention takes is as follows:
A kind of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique, comprises following processing step:
S1, screening: utilize the vibratory sieve that sieve aperture is 80*80mm that the iron block in secondary zinc oxide slag is screened;
S2, fragmentation: remaining secondary zinc oxide slag after screening in step S1 is carried out to fragmentation by vertical hammer-crusher;
S3, dry magnetic separation: the secondary zinc oxide slag after fragmentation in step S2 is done to magnetic separation by magnetic separation belt, by the not material removal containing iron powder;
S4, ball milling: material transferring to the single storehouse ball mill after dry magnetic separation in step S3 is carried out to ball milling, make material particles degree reach at least 20 orders;
S5, magnetic separation: the material after ball milling in step S4 is carried out to further magnetic separation, remove the tailing that does not contain iron powder in material, make material Fe content be increased to 75%-79%;
S6, gravity treatment: utilize precipitating type grader that material is carried out to gravity treatment, further improve the content of Fe to 80-89%, and material is dewatered, to carry out subsequent ball milling operation;
S7, ball milling: by single storehouse ball mill, material is carried out to ball milling, more than further the granularity of cadmia being reduced to 80 orders, and carry out the separation of slag iron, reduce cinder inclusion phenomenon, be convenient to choosing of Fe;
S8, magnetic separation: the material after using two wet type half counter-current magnetic separators to ball milling carries out magnetic separation, improve the content of Fe to 90%-92%;
S9, gravity treatment: utilize precipitating type grader that material is carried out again, the content of Fe is increased to more than 92%, and material is dewatered;
S10, dehydration: will transfer to successively in vibrated and dehydrated device and dry kiln and dewater through step S9 material after treatment;
S11, reduction: the material after dehydration is sent in swinging hydrogen reducing furnace and is reduced;
S12, screening: the material after reduction is passed to three-D and revolves riddler and sieve, material is divided into below 100 orders by granular size, 100-200 order and more than 200 orders.
S13, packaging, pack the product after screening by vacuum packing machine, to avoid product oxidation.
Preferably, in described step S6 and step S9, the material that carries out removing after gravity treatment carries out magnetic separation, obtains Fe
3o
4content reaches more than 55% iron fine powder, for use in joining ore deposit.
Preferably, material is carried out predrainage by described vibrated and dehydrated device, and the water content of material is reached below 6%, to reduce the energy consumption of dry kiln, reduces production costs.
A produce line for secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique, comprises the discharging bin, reciprocating sieve, vertical hammer-crusher, magnetic separation belt, first single storehouse ball mill, the first wet type half counter-current magnetic separator, the first precipitating type grader, second single storehouse ball mill, the second wet type half counter-current magnetic separator, the second precipitating type grader, vibrated and dehydrated device, dry kiln, swinging hydrogen reducing furnace, three-D reciprocating sieve and the discharging bin that set gradually.
Preferably, lower end first material-conveying belt of described feeding warehouse, the first material-conveying belt is obliquely installed, its rear end extends to reciprocating sieve top, and material is sent in reciprocating sieve and is sieved, the rear end of reciprocating sieve is provided with the second material-conveying belt, and the rear end of the second material-conveying belt extends to the top of vertical hammer-crusher, and the material after shaking-sieving is passed to vertical hammer-crusher.
Preferably, the bottom of described vertical hammer-crusher is provided with magnetic separation belt, and the material after vertical hammer-crusher carries out fragmentation falls on magnetic separation belt and does magnetic separation; The rear end of magnetic separation belt extends on first single storehouse ball mill, carries out ball milling; Above-mentioned the first wet type half counter-current magnetic separator comprises two, and two first wet type half counter-current magnetic separators are successively set on the rear end of first single storehouse ball mill, to the material after ball milling is carried out to magnetic separation, removes the not part of ferric charge; The rear end of the first wet type half counter-current magnetic separator is provided with the first precipitating type grader.
Preferably, the material of the first described precipitating type grader after to magnetic separation carries out gravity treatment, to improve the content of Fe, and material dewatered; The rear end of the first precipitating type grader is provided with second single storehouse ball mill.
Preferably, the material of second described single storehouse ball mill after to gravity treatment carries out ball milling, and the rear end of second single storehouse ball mill sets gradually two the second wet type half counter-current magnetic separators, to the material after ball milling is carried out to magnetic separation, removes the not part of ferric charge; The rear of the second wet type half counter-current magnetic separator arranges the second precipitating type grader, to the material after magnetic separation is carried out to gravity treatment, to improve the content of Fe, and material is dewatered.
Preferably, the below, rear end of the second described precipitating type grader arranges vibrated and dehydrated device, to material is carried out to predrainage; The rear end of vibrated and dehydrated device is provided with the 3rd material-conveying belt, and the 3rd material-conveying belt is passed to the material after predrainage in dry kiln, carries out drying and dehydrating; The rear end of dry kiln is provided with the 4th material-conveying belt, and material is passed to swinging hydrogen reducing furnace by the 4th material-conveying belt.
Preferably, described swinging hydrogen reducing furnace reduces to the material after dewatering, the rear end of swinging hydrogen reducing furnace arranges the 5th material-conveying belt, the 5th material-conveying belt is passed to the material after reduction in three-D reciprocating sieve and sieves, divide three ranks to sieve by granular size material, the material after screening is passed in discharging bin and is stored by the 6th material-conveying belt.
Beneficial effect of the present invention is:
The present invention is by zinc oxide slag is carried out to fragmentation, ball milling, and magnetic separation, gravity treatment, dries, reduction, multiple flow processs such as screening, produce secondary reduction iron powder.The present invention has carried out recycling of the degree of depth to cadmia, and the product of each link can directly be faced market, real accomplishes energy-conserving and environment-protective; And each product can produce considerable economic benefit.Particularly: the magnetic field intensity configuration of 1, magnetic separation link, reasonably magnetic field intensity proportioning can effectively be upgrade, and reduces mechanical energy consumption and runs ore deposit phenomenon; 2, the use of novel rotation reduction furnace, is domesticly used this kind of reduction furnace for iron powder reducing without enterprise temporarily; Rotary reduction furnace can reduce hydrogen usage, has again better reduction effect simultaneously; 3, the mechanical arrangements model of whole flow process, reasonably configuration machinery, effectively reduces energy consumption, artificial, and improves the quality of products.At present, both at home and abroad all temporarily without using cadmia to manufacture the technique of secondary reduction powder.
Brief description of the drawings
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is the structural representation of feeding warehouse of the present invention and reciprocating sieve.
Fig. 3 is the structural representation of the vertical hammer-crusher of the present invention and magnetic separation belt.
Fig. 4 is the structural representation of the single storehouse of the present invention first ball mill, the first wet type half counter-current magnetic separator and the first precipitating type grader.
Fig. 5 is the structural representation of the single storehouse of the present invention second ball mill, the second wet type half counter-current magnetic separator, the second precipitating type grader and vibrated and dehydrated device.
Fig. 6 is the structural representation of dry kiln of the present invention.
Fig. 7 is the structural representation of swinging hydrogen reducing furnace of the present invention, three-D reciprocating sieve and discharging bin.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figures 1 to 7, the technical scheme that the present invention takes is as follows: a kind of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique, comprises following processing step:
S1, screening: utilize the vibratory sieve that sieve aperture is 80*80mm that the iron block in secondary zinc oxide slag is screened;
S2, fragmentation: remaining secondary zinc oxide slag after screening in step S1 is carried out to fragmentation by vertical hammer-crusher;
S3, dry magnetic separation: the secondary zinc oxide slag after fragmentation in step S2 is done to magnetic separation by magnetic separation belt, by the not material removal containing iron powder;
S4, ball milling: material transferring to the single storehouse ball mill after dry magnetic separation in step S3 is carried out to ball milling, make material particles degree reach at least 20 orders;
S5, magnetic separation: the material after ball milling in step S4 is carried out to further magnetic separation, remove the tailing that does not contain iron powder in material, make material Fe content be increased to 75%-79%;
S6, gravity treatment: utilize precipitating type grader that material is carried out to gravity treatment, further improve the content of Fe to 80-89%, and material is dewatered, to carry out subsequent ball milling operation;
S7, ball milling: by single storehouse ball mill, material is carried out to ball milling, more than further the granularity of cadmia being reduced to 80 orders, and carry out the separation of slag iron, reduce cinder inclusion phenomenon, be convenient to choosing of Fe;
S8, magnetic separation: the material after using two wet type half counter-current magnetic separators to ball milling carries out magnetic separation, improve the content of Fe to 90%-92%;
S9, gravity treatment: utilize precipitating type grader that material is carried out again, the content of Fe is increased to more than 92%, and material is dewatered;
S10, dehydration: will transfer to successively in vibrated and dehydrated device and dry kiln and dewater through step S9 material after treatment;
S11, reduction: the material after dehydration is sent in swinging hydrogen reducing furnace and is reduced;
S12, screening: the material after reduction is passed to three-D and revolves riddler and sieve, material is divided into below 100 orders by granular size, 100-200 order and more than 200 orders.
S13, packaging, pack the product after screening by vacuum packing machine, to avoid product oxidation.
In step S6 and step S9, the material that carries out removing after gravity treatment carries out magnetic separation, obtains Fe
3o
4content reaches more than 55% iron fine powder, for use in joining ore deposit.
Material is carried out predrainage by vibrated and dehydrated device, and the water content of material is reached below 6%, to reduce the energy consumption of dry kiln, reduces production costs.
A produce line for secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique, comprises the discharging bin 1, reciprocating sieve 3, vertical hammer-crusher 5, magnetic separation belt 6, first single storehouse ball mill 7, the first wet type half counter-current magnetic separator 8, the first precipitating type grader 9, second single storehouse ball mill 10, the second wet type half counter-current magnetic separator 11, the second precipitating type grader 12, vibrated and dehydrated device 13, dry kiln 15, swinging hydrogen reducing furnace 17, three-D reciprocating sieve 19 and the discharging bin 21 that set gradually.
Lower end first material-conveying belt 2 of feeding warehouse 1, the first material-conveying belt 2 is obliquely installed, its rear end extends to reciprocating sieve 2 tops, and material is sent in reciprocating sieve 2 and is sieved, the rear end of reciprocating sieve 2 is provided with the second material-conveying belt 4, the rear end of the second material-conveying belt 4 extends to the top of vertical hammer-crusher 5, and the material after shaking-sieving is passed to vertical hammer-crusher 5.
The bottom of vertical hammer-crusher 5 is provided with magnetic separation belt 6, carries out material after fragmentation fall on magnetic separation belt 6 and do magnetic separation through vertical hammer-crusher 5; The rear end of magnetic separation belt 6 extends on first single storehouse ball mill 7, carries out ball milling; Above-mentioned the first wet type half counter-current magnetic separator 8 comprises two, and two first wet type half counter-current magnetic separators 8 are successively set on the rear end of first single storehouse ball mill 7, to the material after ball milling is carried out to magnetic separation, remove the not part of ferric charge; The rear end of the first wet type half counter-current magnetic separator 8 is provided with the first precipitating type grader 9.
The first precipitating type grader 9 carries out gravity treatment to the material after magnetic separation, to improve the content of Fe, and material is dewatered; The rear end of the first precipitating type grader 9 is provided with second single storehouse ball mill 10.
Second single storehouse ball mill 10 carries out ball milling to the material after gravity treatment, and the rear end of second single storehouse ball mill 10 sets gradually two the second wet type half counter-current magnetic separators 11, to the material after ball milling is carried out to magnetic separation, removes the not part of ferric charge; The rear of the second wet type half counter-current magnetic separator 11 arranges the second precipitating type grader 12, to the material after magnetic separation is carried out to gravity treatment, to improve the content of Fe, and material is dewatered.
The below, rear end of the second precipitating type grader 12 arranges vibrated and dehydrated device 13, to material is carried out to predrainage; The rear end of vibrated and dehydrated device 13 is provided with the 3rd material-conveying belt 14, the three material-conveying belts 14 material after predrainage is passed in dry kiln 15, carries out drying and dehydrating; The rear end of dry kiln 15 is provided with the 4th material-conveying belt 16, the four material-conveying belts material is passed to swinging hydrogen reducing furnace 17.
Swinging hydrogen reducing furnace 17 reduces to the material after dewatering, the rear end of swinging hydrogen reducing furnace 17 arranges the 5th material-conveying belt 18, the 5th material-conveying belt 18 is passed to the material after reduction in three-D reciprocating sieve 19 and sieves, divide three ranks to sieve by granular size material, the material after screening is passed in discharging bin 21 and is stored by the 6th material-conveying belt 20.
Further, the present invention is embodied as:
1. screening: secondary zinc oxide slag (hereinafter to be referred as cadmia) is in process of production because reducing atmosphere is unstable, and the reason of non-uniform temperature is understood some Fe and directly become iron block, and the effect of screening is separated this part iron block exactly.Iron block can be directly used in electric furnace steel making.Use reciprocating sieve to sieve, sieve aperture is 80mm*80mm.Oversize is iron block, and minus mesh enters next flow process.
2. fragmentation: the broken energy consumption that act as minimizing subordinate flow process, improves operation rate of machinery, and further isolates the little iron block in cadmia.Use vertical hammer-crusher to carry out fragmentation, because the cadmia after screening also contains some little iron blocks, use Hubei Province examination disintegrating machine often to there will be card machine phenomenon, cause flow process obstructed.Use the vertical hammer-crusher can head it off, larger because of hammer-crusher inner space, after entering to beat, can pass through little iron block that cannot be broken, therefore can not cause card machine phenomenon.Hammer-crusher model is determined according to treating capacity.To process 6000 tons of cadmias the moon as example, use the vertical hammer-crusher of 1000mm*1200mm, discharging opening is joined sieve plate, and sieve aperture is 20mm, and oversize is iron block, and minus mesh enters next flow process.
3. dry magnetic separation: a part of nonferrous material (hereinafter referred to as tail powder) is removed in acting as of dry magnetic separation, reduces next flow process energy consumption.Tail powder can be used for environmental protection brick, cement brick, the manufacture of common brick.Dry magnetic separation is used magnetic separation belt to carry out, and magnetic cylinder magnetic field intensity is 3000 Gausses.What do not go up magnetic material is tail powder, and upper magnetic material enters next flow process.
4. ball milling: acting as of ball milling reduces cadmia granularity (more than reaching 20 orders), is convenient to choosing of Fe.Use single storehouse energy-saving ball mill, more even because of the raw meal particle size of next requirements of process, therefore single storehouse energy-saving ball mill is more better than two storehouses grinding machine or compartment mill.Ball mill model is determined according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, use 1557 single storehouse energy-saving ball mills to carry out ball milling, make more than raw meal particle size reaches 20 orders.After ball milling, material enters next flow process.
5. magnetic separation: a part of nonferrous material is removed in acting as of magnetic separation, improves the Fe content (reaching more than 75%) of material.Removing material is tail powder, and tail powder can be used for environmental protection brick, cement brick, the manufacture of common brick.Use two wet type half counter-current magnetic separators to carry out magnetic separation, wet type half counter-current magnetic separator has good effect to improving iron grade, and can not produce airborne dust.Wet type half counter-current magnetic separator model is determined according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, use 1000mm*1800mm, each one of 800mm*1800mm, it is 1800 Gausses that magnetic field intensity is respectively 1000mm*1800mm wet type half counter-current magnetic separator, 800mm*1800mm wet type half counter-current magnetic separator is 1200 Gausses, and two equipment are contacted.What do not go up magnetic material is tail powder, and upper magnetic material enters next flow process.
6. gravity treatment: acting as of gravity treatment improves the Fe content (reaching more than 80%) of material, and material is carried out to dehydration to a certain degree, the material moisture that makes to enter next stage ball milling is up to standard.It is iron fine powder that the material of removing carries out after magnetic separation.Iron fine powder main component is Fe3o4, and content can reach more than 55%, can be used for joining ore deposit.Use immersion grader to carry out gravity treatment, the long-range about shaking table of grader treating capacity, gravity treatment effect is also more satisfactory, and can between magnetic separator and ball mill, form connection, do not need to re-use the equipment such as sludge pump, concentrator, thereby reach ideal energy-saving effect.Immersion grader model is determined according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, use 750mm*6000mm immersion grader to carry out gravity treatment, emersion physics carries out magnetic separation, and unclassified stores enters next flow process.
7. ball milling: acting as of ball milling further reduces cadmia granularity (more than reaching 80 orders), carries out to greatest extent the separation of slag iron, reduces cinder inclusion phenomenon, is convenient to choosing of Fe.Use single storehouse energy-saving ball mill.Ball mill model is determined according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, use 1245 single storehouse energy-saving ball mills to carry out ball milling, more than making raw meal particle size average out to 100 orders.After ball milling, material enters next flow process.
8. magnetic separation: a part of nonferrous material is removed in acting as of magnetic separation, improves the Fe content (reaching more than 90%) of material.Removing material is tail powder, and tail powder can be used for environmental protection brick, cement brick, the manufacture of common brick.Use two wet type half counter-current magnetic separators to carry out magnetic separation.Wet type half counter-current magnetic separator model is determined according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, use 1000mm*1500mm, 800mm*1500mm one, it is 1000 Gausses that magnetic field intensity is respectively 1000mm*1500mm wet type half counter-current magnetic separator, 800mm*1500mm wet type half counter-current magnetic separator is 800 Gausses, and two equipment are contacted.What do not go up magnetic material is tail powder, and upper magnetic material enters next flow process.
9. gravity treatment: the Fe content (reaching more than 92%) that act as raising material of gravity treatment, and material is carried out to dehydration to a certain degree, the material moisture that enters next stage flow process is reduced.It is iron fine powder that the material of removing carries out after magnetic separation.Iron fine powder main component is Fe3o4, and content can reach more than 55%, can be used for joining ore deposit.Using immersion grader (or shaking table, spiral concentrator) to carry out gravity treatment immersion grader model determines according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, use 750mm*6000mm immersion grader to carry out gravity treatment, emersion thing carries out magnetic separation, and unclassified stores enters next flow process.
10. dehydration: dehydration is to provide dry material for next step reduction.Use vibrated and dehydrated device and dry kiln to dewater.Because material iron content is high, than great, use vibrated and dehydrated device dehydrating effect obvious, can make material moisture reach in 6%, significantly reduce production costs and dry kiln energy consumption.Vibrated and dehydrated device and dry kiln are determined according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, vibrated and dehydrated device uses 1000*1600 vibrated and dehydrated device, and dry kiln uses 1000mm*12000mm dry kiln.After dry materials, enter next flow process.
11. reduction: the contained oxygen molecule of material is removed in acting as of reduction, and carbon molecule and other harmful elements, improve material Fe content (reaching more than 95%).Make the indices of material reach product standard.Use swinging hydrogen reducing furnace to reduce, swinging hydrogen reducing furnace is better more energy-conservation than traditional belt type reducing furnace reduction effect.Swinging hydrogen reducing furnace model is determined according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, use 1200mm*5000mm swinging hydrogen reducing furnace to reduce, after reduction, material enters next flow process.
12. screenings: the effect of screening is that each grade product is classified, different because of the product order number that each producer needs, so we must come product by the classification of order number, be divided into 3 ranks: 100 following products, 100 order to 200 order products, the above product of 200 order.Revolve riddler with three-D and sieve, it is stable that three-D revolves riddler, and maintenance rate is low.Three-D revolves riddler model to be determined according to treating capacity.To process 6000 tons of cadmias the moon as example, coordinate above-mentioned flow process, use 800mm three-D to revolve riddler, ground floor screen cloth uses 100 eye mesh screens, and the second layer uses 200 eye mesh screens.Next flow process of all product introductions.
13. packagings: product secondary pollution and oxidation are avoided in acting as of packaging, convenient storage and transport.Use vacuum packing machine to pack, adopt vacuum packaging shell to avoid product to contact with air as far as possible, prevent product oxidation, extend shelf life of products.Vacuum packing machine model determines, to process 6000 tons of cadmias the moon as example, to coordinate above-mentioned flow process according to treating capacity, uses NT-850 vacuum packing machine to pack.After packaging, it is finished product.
Embodiments of the invention are just introduced its detailed description of the invention, do not lie in and limit its protection domain.The technical staff of the industry can make some amendment under the inspiration of the present embodiment, and the equivalence of doing according to the scope of the claims of the present invention therefore all changes or modifies, and all belongs within the scope of Patent right requirement of the present invention.
Claims (10)
1. a secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique, is characterized in that, comprises following processing step:
S1, screening: utilize the vibratory sieve that sieve aperture is 80*80mm that the iron block in secondary zinc oxide slag is screened;
S2, fragmentation: remaining secondary zinc oxide slag after screening in step S1 is carried out to fragmentation by vertical hammer-crusher;
S3, dry magnetic separation: the secondary zinc oxide slag after fragmentation in step S2 is done to magnetic separation by magnetic separation belt, by the not material removal containing iron powder;
S4, ball milling: material transferring to the single storehouse ball mill after dry magnetic separation in step S3 is carried out to ball milling, make material particles degree reach at least 20 orders;
S5, magnetic separation: the material after ball milling in step S4 is carried out to further magnetic separation, remove the tailing that does not contain iron powder in material, make material Fe content be increased to 75%-79%;
S6, gravity treatment: utilize precipitating type grader that material is carried out to gravity treatment, further improve the content of Fe to 80-89%, and material is dewatered, to carry out subsequent ball milling operation;
S7, ball milling: by single storehouse ball mill, material is carried out to ball milling, more than further the granularity of cadmia being reduced to 80 orders, and carry out the separation of slag iron, reduce cinder inclusion phenomenon, be convenient to choosing of Fe;
S8, magnetic separation: the material after using two wet type half counter-current magnetic separators to ball milling carries out magnetic separation, improve the content of Fe to 90%-92%;
S9, gravity treatment: utilize precipitating type grader that material is carried out again, the content of Fe is increased to more than 92%, and material is dewatered;
S10, dehydration: will transfer to successively in vibrated and dehydrated device and dry kiln and dewater through step S9 material after treatment;
S11, reduction: the material after dehydration is sent in swinging hydrogen reducing furnace and is reduced;
S12, screening: the material after reduction is passed to three-D and revolves riddler and sieve, material is divided into below 100 orders by granular size, 100-200 order and more than 200 orders.
S13, packaging, pack the product after screening by vacuum packing machine, to avoid product oxidation.
2. a kind of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique according to claim 1, is characterized in that: in described step S6 and step S9, the material that carries out removing after gravity treatment carries out magnetic separation, obtains Fe
3o
4content reaches more than 55% iron fine powder, for use in joining ore deposit.
3. a kind of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique according to claim 1, it is characterized in that: material is carried out predrainage by described vibrated and dehydrated device, the water content of material is reached below 6%, to reduce the energy consumption of dry kiln, reduce production costs.
4. the produce line of the secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique described in a claim 1, it is characterized in that: comprise the discharging bin (1) setting gradually, reciprocating sieve (3), vertical hammer-crusher (5), magnetic separation belt (6), first single storehouse ball mill (7), the first wet type half counter-current magnetic separator (8), the first precipitating type grader (9), second single storehouse ball mill (10), the second wet type half counter-current magnetic separator (11), the second precipitating type grader (12), vibrated and dehydrated device (13), dry kiln (15), swinging hydrogen reducing furnace (17), three-D reciprocating sieve (19) and discharging bin (21).
5. the produce line of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique according to claim 4, it is characterized in that: lower end first material-conveying belt (2) of described feeding warehouse (1), the first material-conveying belt (2) is obliquely installed, its rear end extends to reciprocating sieve (2) top, and material is sent in reciprocating sieve (2) and is sieved, the rear end of reciprocating sieve (2) is provided with the second material-conveying belt (4), the rear end of the second material-conveying belt (4) extends to the top of vertical hammer-crusher (5), and the material after shaking-sieving is passed to vertical hammer-crusher (5).
6. the produce line of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique according to claim 5, it is characterized in that: the bottom of described vertical hammer-crusher (5) is provided with magnetic separation belt (6), carry out material after fragmentation through vertical hammer-crusher (5) and fall on magnetic separation belt (6) and do magnetic separation; It is upper that the rear end of magnetic separation belt (6) extends to first single storehouse ball mill (7), carries out ball milling; Above-mentioned the first wet type half counter-current magnetic separator (8) comprises two, two first wet type half counter-current magnetic separators (8) are successively set on the rear end of first single storehouse ball mill (7), to the material after ball milling is carried out to magnetic separation, remove the not part of ferric charge; The rear end of the first wet type half counter-current magnetic separator (8) is provided with the first precipitating type grader (9).
7. the produce line of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique according to claim 6, it is characterized in that: the first described precipitating type grader (9) carries out gravity treatment to the material after magnetic separation, to improve the content of Fe, and material dewatered; The rear end of the first precipitating type grader (9) is provided with second single storehouse ball mill (10).
8. the produce line of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique according to claim 7, it is characterized in that: second described single storehouse ball mill (10) carries out ball milling to the material after gravity treatment, the rear end of second single storehouse ball mill (10) sets gradually two the second wet type half counter-current magnetic separators (11), to the material after ball milling is carried out to magnetic separation, remove the not part of ferric charge; The rear of the second wet type half counter-current magnetic separator (11) arranges the second precipitating type grader (12), to the material after magnetic separation is carried out to gravity treatment, to improve the content of Fe, and material is dewatered.
9. the produce line of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique according to claim 8, it is characterized in that: the below, rear end of the second described precipitating type grader (12) arranges vibrated and dehydrated device (13), to material is carried out to predrainage; The rear end of vibrated and dehydrated device (13) is provided with the 3rd material-conveying belt (14), and the 3rd material-conveying belt (14) is passed to the material after predrainage in dry kiln (15), carries out drying and dehydrating; The rear end of dry kiln (15) is provided with the 4th material-conveying belt (16), and material is passed to swinging hydrogen reducing furnace (17) by the 4th material-conveying belt.
10. the produce line of secondary zinc oxide rotary kiln tailings comprehensive cyclic utilization technique according to claim 9, it is characterized in that: described swinging hydrogen reducing furnace (17) reduces to the material after dewatering, the rear end of swinging hydrogen reducing furnace (17) arranges the 5th material-conveying belt (18), the 5th material-conveying belt (18) is passed to the material after reduction in three-D reciprocating sieve (19) and sieves, divide three ranks to sieve by granular size material, material after screening is passed in discharging bin (21) and is stored by the 6th material-conveying belt (20).
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| CN104773751A (en) * | 2015-04-22 | 2015-07-15 | 衢州市业胜金属材料有限公司 | Method for removing fluorine, chlorine and valuable metals in secondary zinc oxide |
| CN105463184A (en) * | 2015-12-09 | 2016-04-06 | 西安建筑科技大学 | Mining pretreatment equipment |
| CN109053044A (en) * | 2018-08-09 | 2018-12-21 | 云南宏佑投资有限公司 | A method of with oxidation rotary kiln tailings polymers |
| CN111069261A (en) * | 2019-11-02 | 2020-04-28 | 泗水惠丰农业开发工程有限公司 | Process flow for industrially preparing soil through water filtration and purification |
| CN112974467A (en) * | 2021-02-03 | 2021-06-18 | 徐州瑞马智能技术有限公司 | Hot galvanizing zinc slag recycling and regenerating system |
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