CN100592933C - Novel rhombohedral iron ore beneficiation technics - Google Patents
Novel rhombohedral iron ore beneficiation technics Download PDFInfo
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Abstract
The present invention belongs to the ore separation technical field, in particular to a mill run technics, which includes the smashing and sieving of ores, grinding and classification, dephosphorization treatment and floatation ore separation, ore separation of hematite rich in phosphor of ore powder classification, wherein the present invention is characterized in that the hematite rich in phosphor is smashed and sieved, grinded and classified, and then undergo twice floatation ore separation to eliminate the phosphor and the silicon, then rough separation, fine separation and scavenging is carried out for the ore powder with the cooperation between a spiral chute and a swinging bed, to improve the standard of the iron and decrease content of the phosphor and silicon to obtain the iron core for smelting, which meets the requirement of the metallurgy industry.
Description
Technical field
The invention belongs to the ore-dressing technique technical field, relate more particularly to rhombohedral iron ore beneficiation technics.More specifically, the present invention relates to a kind of order and handle the high-phosphorus hematite ore-dressing technique that makes up with main operational steps such as float glass process ore dressing, breeze classifications by ore reduction screening, grind grading, Dephosphorising agent.
Background technology
The chemical composition of bloodstone is Fe
2O
3, crystal belongs to the oxide mineral of trigonal system.Bloodstone is the extremely wide iron mineral of distributed in nature, is important iron-smelting raw material, can be used for the cement plant after mine tailing concentrates and does main material and also can be used as red pigment.When the bloodstone phosphorus content when 0.5% (weight) is above, then be considered to high-phosphorus hematite.Most important hematite deposits are rotten formation, and some are also arranged is that hydrothermal solution forms, or weathering and colloidal precipitation form in the large-scale piece of water.Areas such as west place in Hubei iron ore band is distributed in Yichang, bestow favour, about 2,200,000,000 tons of proved reserves, the tens billion of approximately tons of national reserves though such ore reserves is abundant, all belong to high-phosphorus hematite.Because the high-phosphorus hematite difficulty is selected difficult smelting, the iron ore product can not satisfy the steel and iron industry technical indicator, and traditional bloodstone dephosphorizing technology is difficult to solve this major issue of dephosphorization owing to be subjected to condition restriction such as technique of preparing means, energy-saving and environmental protection, cost in actual production.According to statistics, China is the rare country of iron ore deposit, about 300,000,000 tons of year imported iron ore resource.Find so far from five sixties of last century, always on discovery techniques reliably, rational process economically, be reduced to a certain degree with phosphorus content high-phosphorus hematite, (the iron content: 55%～75% of upgrading, phosphorus content: 0.2%～0.4%, percentage composition herein is by weight; In addition, except as otherwise noted, the percentage composition among the present invention is all by weight), with the raw material of bloodstone as blast furnace ironmaking.Therefore bloodstone being carried out effective dephosphorization is a kind of technology that huge practical value is arranged, but difficulty is very high, remains the difficult problem of domestic and international smelting selecting technology at present.
Adopting physical method promptly to increase mog at present both at home and abroad separates through strong magnetic again, or with chemical flotation collector particulate dephosphorization, or improve chemical reaction dephosphorization in the blast furnace, or extra furnace dephosphorization etc. after ironmaking, these dephosphorizing technologies also are in the exploratory stage, and all have many problems at aspects such as equipment, cost, the energy, investment, efficient, environmental protection.Though different types of acid also is a kind of stronger lytic agent, but when adopting acid system to handle bloodstone, because the Iron Ore Powder particle is less and be oxide, therefore responsive to the acids reaction, iron is simultaneously dissolved in sour solvent colloidal sol process, cause ferrous components to run off, and also there is serious problem of environmental pollution in acid treatment.
Summary of the invention
This beneficiating method is by using Dephosphorising agent to high-phosphorus hematite, preferred efficiency natural Dephosphorising agent, and creatively unite the flotation of utilization secondary, secondary sluicing and shaking table and scan, finally successfully reduced the content of harmful element phosphorus, silicon etc. in the bloodstone, improved the grade of iron, what obtained to meet the smelting process requirement goes into the stove iron ore.In addition when the natural Dephosphorising agent of the friendly type of applying environment, the environmental protection more of this beneficiating method, economy adapt to the scientific and technological production model of energy-saving and emission-reduction.
The objective of the invention is at the many difficult problem of high-phosphorus hematite at ore dressing process, a kind of brand-new rhombohedral iron ore beneficiation technics is provided, the solution that this technology is breakthrough bloodstone dephosphorization silica removal difficulty, iron content hangs down and problems such as iron recovery is low, having captured the processing difficult problem of global iron tailings simultaneously, is the technique of preparing of an economy, energy-saving and environmental protection, comprehensive utilization, high efficiency.
Therefore, the invention provides a kind of order and handle the high-phosphorus hematite ore-dressing technique that makes up with main operational steps such as float glass process ore dressing, breeze classifications by ore reduction screening, grind grading, Dephosphorising agent, it is characterized in that and to impose Dephosphorising agent behind high-phosphorus hematite ore reduction screening, the grind grading, and the flotation of process two-stage reaches the purpose of dephosphorization silica removal, unite again utilization spiral chute and shaking table carry out the roughly selecting of breeze, selected, scan, smelting process requires goes into the stove iron ore thereby the content that improves the iron grade and reduce element phosphor, silicon is to obtain to meet.Wherein national smelting standard: Fe 〉=55%, P≤0.4%, SiO
2≤ 8% genus can utilize breeze; Fe 〉=60%, P≤0.3%, SiO
2≤ 6% belongs to country-level standard.
What need further specify is, as mentioned above, employed among the present invention " high-phosphorus hematite " is meant that phosphorus content is at 0.5% bloodstone.More specifically, in high-phosphorus hematite used in the present invention: P is average more than 0.5%, Fe is average more than 35%, SiO
2Average more than 12%.
For the ore reduction screening process, three grade of one closed circuit flow process adopted in the crushing and screening operation, the bloodstone stone of Fe grade 35-45%, P content about 1% respectively through heavy jaw crusher, gyratory crusher, the thick type gyratory crusher of brachycephaly carry out coarse crushing, in broken, in small, broken bits, ore particle maximum ore discharge granularity after circular shale shaker screening is 15mm.
The grind grading process: grinding-classification operation adopts two sections closed circuit flow processs, form closed circuit flow process by grate ball mill and spiral classifier for first section, first section classification overflow granularity 200 order, account for 60%, because ore pulp viscosity is big, second section is adopted high frequency fine screen and overflowball mill to constitute closed circuit flow process, for improving second section grinding efficiency, high frequency sieve sieve top is heavy to feed ball mill after being concentrated by cyclone again, and final grinding particle size (be high frequency sieve sieve down) is 200 orders, accounts for 95%.
The precision of bloodstone classification is the key technical index that concentrate yield and the rate of recovery after Dephosphorising agent dephosphorization and the flotation are repeatedly executed in decision in the technological process of production.This law characteristics are except that the conventional classification string of abundant comprehensive utilization partition level, also execute the Dephosphorising agent dephosphorization and once more ore pulp are carried out classification by the high frequency sieve before the flotation repeatedly entering.The high frequency sieve is high frequency sieve commonly used in this area.Because the high frequency sieve (for example: 3000 times/minute vibratings has the excitation principle uniqueness, interval judder in 5 minutes 5000 times/minute), net hole rate of screen cloth height, compass screen surface have distinguishing features such as self-cleaning ability, ore particles had both been pressed the physical dimension classification in screening process, have sorting again, thereby guaranteed that it is that Dephosphorising agent is handled and the desired uniformity of float glass process ore dressing and order degree that ore particles has next step.Described order degree is that 95% ore particles is not less than 180 orders, and being preferably 95% ore particles is 200 orders.
Described Dephosphorising agent is handled with the float glass process beneficiation steps and is carried out in tank diameter and multicomponent level flotation cell.Described multicomponent level flotation cell comprises and is used in combination first group of flotation cell that is used to carry out flotation and the second group of flotation cell that is used for reverse flotation.Described Dephosphorising agent is handled with the float glass process beneficiation steps and is adopted the multiple spot addition method that adds the single-point addition method of whole Dephosphorising agents or add Dephosphorising agent in tank diameter in tank diameter and multicomponent level flotation cell.The addition of described Dephosphorising agent is 1-5 kilogram Dephosphorising agent/ton ore, preferred 1.5-2.5 kilogram Dephosphorising agent/ton ore, more preferably 1.85 kilograms of Dephosphorising agent/ton ores.
Dephosphorising agent is supplied to tank diameter and multicomponent level flotation cell respectively by Dephosphorising agent storage tank bottom conduit.The Dephosphorising agent storage tank is with 300 ℃ of conduction oil circulation pipe temperature controls, 60～100 ℃ of temperature ranges.In the single-point addition method, Dephosphorising agent is all joined in the tank diameter.In the multiple spot addition method, Dephosphorising agent is added in tank diameter and the multicomponent level flotation cell.The Dephosphorising agent that adds tank diameter mixes formation and distributes the ore pulp stable, that concentration ratio is suitable with breeze.Preferably, in tank diameter, add 30%-50%, preferred 40% Dephosphorising agent, to the single groove supply total of the first group of flotation cell classification 25%-35% that is used for carrying out flotation, preferred 30% Dephosphorising agent, and to the single groove supply total of the second group of flotation cell classification 25-35% that is used for carrying out reverse flotation, preferred 30% Dephosphorising agent.
The feature that it is pointed out that this technology just is that flotation device is divided into two groups carries out flotation, reverse flotation, and repacks Dephosphorising agent storage tank bottom into multistage single groove supply Dephosphorising agent.Its advantage has been to increase the action time of Dephosphorising agent, has improved the efficient of dephosphorization silica removal, has saved the consumption of Dephosphorising agent
Described Dephosphorising agent is selected from chemical Dephosphorising agent or natural Dephosphorising agent, preferred natural Dephosphorising agent.Described natural Dephosphorising agent comprises grease 50-90%, soap (in the C18 odium stearate) 4-20% and free organic acids 2-15%, the specific descriptions of this Dephosphorising agent see also the Chinese patent application 200610081553.X that the applying date is on May 26th, 2006, and the full text of this patent application is quoted with for referencial use by this paper.
Press raw ore (Fe:45%, P:1.2～2.2%, SiO
2: 12～22%) calculate, execute natural silica removal Dephosphorising agent after, flotation for the first time produces and dissolves colloid phosphorus, removes simultaneously more than the P65%, removes SiO
2More than 60%, iron improves 4-5 grade.Reverse flotation removes about P15% for the second time, removes SiO
2About 15%, iron improves 3-4 grade.
The breeze graded operation is taked to roughly select chute, is carefully selected chute and shaking table integration of operation flow process.Through the ore pulp of twice reverse flotation, enter and roughly select spiral chute, the chats of roughly selecting spiral chute enters and carefully selects spiral chute.Carefully select the chats of chute to enter the fiberglass slimer and scan, the chats of shaking table self also returns shaking table and continues to scan simultaneously.This law characteristics are to unite utilization chute and shaking table and carry out sorting, in the technology different from the past only with both one of pattern.Its advantage is that the chats by continuous chats that will carefully select chute and shaking table self returns shaking table and scans repeatedly, has effectively improved the rate of recovery and the iron grade of iron.
Raw ore (Fe:45%, P:1.2～2.2%, SiO
2: 12～22%) carry out heavily sorting and get rid of through laggard spiral chute sorting (in the branch, smart, tail) P, Si and the light foreign material thereof roughly selected of floatation process, iron can improve 4-6 grade.
Roughly selecting to enter after spiral chute sorts carefully selects spiral chute to sort continuation repetition sorting eliminating P, SiO
2, iron can improve 3-5 grade simultaneously.
Through above-mentioned two floating, two slip selectedly, iron can improve 16-20 grade, P:0.2%～0.3%, SiO
2: 4%.
Scan by the fiberglass shaking table at last, iron can improve 3-4 grade, and final iron grade can reach more than 64%.
Need to prove especially, when the rhombohedral iron ore beneficiation technics that adopts this area routine carries out ore dressing and handles high-phosphorus hematite, then existing high-phosphorus hematite can't be transformed at all meet the smelting process requirement go into the stove iron ore.The present invention has then solved this problem fully.
The present invention adopts has the natural Dephosphorising agent of dephosphorization control silicon effect and unconventional innovation mineral processing circuit, solved the global problem of high-phosphorus iron ore ore dressing and comprehensive utilization, the present invention had both realized the scientific and technological requirement of energy-saving and emission-reduction environmental protection, mine tailing can be processed into cement as raw material again.The Main Ingredients and Appearance of cement is compositions such as silicon, lime stone, calcium, iron, and mine tailing Main Ingredients and Appearance of the present invention conforms to the cement primary raw material, and the order degree all is 200 orders-300 orders, and the order degree of cement is 400 orders.Secondly also can be used for the main material that paints; Or do the full raw material of shale brick.
Description of drawings
Figure 1 shows that the flow chart of a kind of embodiment of high-phosphorus iron ore ore-dressing technique equipment.
The specific embodiment
As shown in Figure 1, ore respectively in jaw crusher (1), circular cone disintegrating machine (2), brachycephaly fine crushing machine (3) carry out coarse crushing, in broken, in small, broken bits, entering one section ball mill (5) again after circular shale shaker (4) screening pulverizes, breeze carries out first section classification through duplex-spiral classifier (6), first section classification overflow granularity 200 order accounts for 60%.Breeze after the classification enters and enters high frequency sifting screen (8) after two sections ball mills (7) are further pulverized, and the high frequency compass screen surface returns thing and concentrates through the hydraulic vortex flow devices classification and return two sections ball mills (7) again after (9) concentrate and grind.Final grinding particle size (being under the high frequency sieve sieve) is 200 orders, accounts for 95% certainly.Breeze enters tank diameter (10), (the Dephosphorising agent storage tank is with 300 ℃ of conduction oil circulation pipe temperature controls by Dephosphorising agent storage tank (11) for tank diameter, 60～100 ℃ of temperature ranges) bottom conduit supply Dephosphorising agent, Dephosphorising agent is used total amount by 1.85 kilograms of Dephosphorising agents/ton bloodstone stone, the Dephosphorising agent of executing accounts for 40% of total amount in the tank diameter, distributes the ore pulp stable, that concentration ratio is suitable by constantly mixing to form.Ore pulp enters 60 flotation devices (12), and every flotation device is also by Dephosphorising agent storage tank bottom conduit supply efficiency natural silica removal Dephosphorising agent.First group 36 of being introduced in 60 flotation devices of ore pulp carry out flotation, and used Dephosphorising agent accounts for 30% of total amount.Ore pulp enters second group 24 and carries out reverse flotation subsequently, and used Dephosphorising agent accounts for 30% of total amount.Through the ore pulp of flotation, reverse flotation, enter and roughly select spiral chute (13), the chats of roughly selecting spiral chute enters selected spiral chute (14).The chats of selected chute enters shaking table (15) and scans, and the chats of while shaking table self also returns shaking table to be continued to scan.Concentrate in spiral chute and the shaking table obtains the concentrate product at last through concentrated the filtration with concentrate filter (17) of concentrate thickener (16).Mine tailing in spiral chute and the shaking table obtains product from failing at last through concentrated the filtration with tailing filtration machine (19) of mine tailing thickener (18).
Non-limiting ground illustrates the equipment of implementing technological process of the present invention below:
1, advance raw ore apron feeder (ore deposit, Shen group): introduce the New-type plate batcher of Germany technology, specification mm/1500 * 8000, q=15 degree, q=300-200t/h, raw ore apron feeder send into thick broken.
2, thick broken (ore deposit, Shen group): the modified type horizontal crusher, specification mm/PE900 * 1200 cast steel bodies is broken during thick broken material enters by conveyer belt.
3, in broken (ore deposit, Shen group): introduce the Xi Mengsi gyratory crusher of American technology, 1 on standard, extraordinarily thick 4-1/Ft type, in broken material enter thin broken by conveyer belt.
4, justify reciprocating sieve (ore deposit, Shen group): YAK1836 type, steel mesh grid, sieve aperture 60mm.
5, carefully broken (ore deposit, Shen group): introduce the Xi Mengsi gyratory crusher of American technology, 2 on brachycephaly, thick type 4-1/Ft type, thin breaking enters round reciprocating sieve by conveyer belt.
6, justify reciprocating sieve (ore deposit, Shen group): 2 on YAK1836 type, steel mesh grid, sieve aperture 15mm.
7, conveyer (ore deposit, Shen group): specification mm/12 * 1200 are movable, and sieve back fines enters feed bin by conveyer belt.
8,1200 cubes of (ore deposit, Shen group) the gloomy industry of woods parent companys of the storage bin of steel construction make, and send into one section ball mushroom machine by electric vibrating feeder.
9,9 of electric vibrating feeders (ore deposit, Shen group).
10, one section ball mill (ore deposit, Shen group): MQG φ 2736 types, the two ore feeders that collude of band, 3 on dextrorotation, rolling bearing, abrasive material flow automatically to two spiral shell graders respectively.
11, duplex-spiral classifier (ore deposit, Shen group): 2FG-24, spillwag chute reduce 338mm, the independent transmission of two spirals, and one section grid ball milling and duplex-spiral classifier constitute closed circuit flow process, do not reach the two sections ball mushrooms that flow automatically to of point sieve mesh degree.
12, two sections ball mills (ore deposit, Shen group): MOY φ 2736, the tape drum formula is given the ore deposit: 3 on left-handed, rolling bearing, ore pulp is sent into the high frequency sieve by 3 cun slag stock pumps.
13, Lu Kai science and technology is produced, the D4-WVSK2418C200 dither vibration sieve (automatic chip control) of the first batch of listing of world lead level, French import stainless steel and the mesh grid of polyester silk.9 of high frequency vibrating screens constitute closed circuit flow process with two sections ball millings, and oversize returns two sections ball mushrooms.
14, hydrocyclone (sea, Weihai, Shandong king): 9 on the gram cloth Leix hydrocyclone FX350 type of introduction American technology, carry out the three road concentrated closed circuit 200 order degree that reach of classifications formation with duplex-spiral classifier, high frequency sieve and advance flotation, two sections ball millings are returned in concentrating through cyclone of not reaching, make the ore pulp 100% of into flotation reach 200 orders, three grades of closed circuit qualified order degree are sent into tank diameter by 4 cun slag stock pumps.
15, tank diameter (ore deposit, Shen group): 3 on XB-2500 type, the ore pulp after dispenser is stirred flows automatically to flotation cell.
16, flotation device (ore deposit, Shen group): 60 on XJ-28 type.
17, bioreactor (Wuxi China reaches landification equipment Co., Ltd and produces): design heat-conducting type voluntarily, normal temperature and pressure 500L, Italy's import igniter, automatically the circulating biological reactor is 2, and alternately preparation is executed agent, executes agent in stirring, two sections twice pair of units are executed agent respectively, play gravity treatment, the best purpose of reverse flotation, ore pulp is sent into by 4 cun slag stock pumps and is roughly selected chute after the flotation.
18, roughly select spiral chute (Shicheng, Jiangxi metallurgical and mining equipment factory): 24 on 5LL-1500 type.Four spiral heads are thrown tail, are received two sections of essence, final election chats, and two sections chats are sent into selected chute by 3 cun slag stock pumps.
19, selected spiral chute (Shicheng, Jiangxi metallurgical and mining equipment factory) 5LL-1200 type is 24.Four spiral heads throwing tail, receipts essence, two sections chats advance shaking table to be scanned, and two sections chats flow automatically to the one-level shaking table.
20, S-6 type double wave fiberglass shaking table (Shicheng, Jiangxi metallurgical and mining equipment factory): scan and connect 60 of the chats of secondary chute under returning.Carry out, throwing tail, receipts essence, chats return secondary shaking table recovery Fe55% and utilize the ore deposit, and ore pulp is sent into the secondary shaking table by 2 cun slag stock pumps.
21, S-6 type double wave fiberglass shaking table (Shicheng, Jiangxi metallurgical and mining equipment factory): recycle 20 of fine ores, throw tail, receipts are utilized concentrate, and simultaneously chats returns and self repeats freely, and all concentrate are all concentrated by 3 cun vertical slag slurry pumps and sent into two concentrate concentration basins respectively.
22, fine ore thickener (pond) (the gloomy industry of woods parent company, ore deposit, Shen group design jointly): full steel structure, overhead 9 meters in the air from cover of ore discharge thing thickener (pond) NZ-20 type.Concentrate the Fe63% fine ore.
23, fine ore thickener (pond) (the gloomy industry of woods parent company, ore deposit, Shen group design jointly) full steel structure, overhead 9 meters in the air from cover of ore discharge thing thickener (pond) NZ-15 type.Concentrate the Fe60% fine ore.
24, concentrate disk filter (ore deposit, Shen group): the U.S. introduces technology, 2 in GPZ-60 type ZBE1303 vavuum pump; 2 of φ 1000 moving discharge opeings; One of 3L52WC roots blower.Filter the smart powder of iron of Fe63%, Fe60% respectively, produce the smart powder charging of finished iron storehouse.
25, slag stock pump (Shijiazhuang industrial water pump factory): the 250ZJ-1-A68 type, the whole tail water of mine tailing are sent into the mine tailing concentration basin.
26, mine tailing thickener (pond) (ore deposit, Shen group): 2 covers of NT-36 type.With all mine tailings in the ore dressing, tail water concentrates certain proportion and sends into the tailing filtration machine with the slag stock pump.
27, mine tailing disk filter (ore deposit, Shen group): GPZ-60 type 6 covers; 6 in ZBE1303 vavuum pump; 6 of φ 1000 moving discharge opeings; 3 of 3L52WC roots blowers are that dry type can be utilized mine tailing with tailing filtration.
28,4 cun, 3 cun, 2 cun ZJF vertical slag slurry pumps of other slag stock pump are respectively applied for the two-stage chute after the flotation, and the outer ore pulp that can not flow automatically such as shaking table returns gravity treatment.If production scale increases, can increase the specification and the model of equipment according to logistics capacity, but constant, all tail water of linker and technological process in producing, through post precipitation, circulation is used for ore dressing once more.
The technic index of concrete every technology products obtained therefrom is as follows:
Embodiment 1:
300 tons of bloodstone main component: Fe:45%, P:1.8%, SiO
2: 18%
Execute natural silica removal Dephosphorising agent and after twice flotation, Fe:52%, P:0.36%, SiO
2: 4.5%
Through roughly select spiral chute, carefully select the spiral chute sorting after, Fe:60%, P:0.24%, SiO
2: 4%.
Scan Fe:63%P:0.1%, SiO by shaking table
2: 3.5%.
At last, obtain concentrate 150t.
Wherein one-level concentrate 95t accounts for 63.33% of 150t concentrate, Fe:63%, P:0.1%, SiO
2: 3.5%, (superstate standard)
Second concentrate powder 40t accounts for 26.67% of 150t concentrate, Fe:60%, P:0.25%, SiO
2: 3.8%, (national standard)
Mix and utilize chats 15t, account for 10% of 150t concentrate, Fe:56%, P:0.3%, SiO
2: 4.5% mixing utilizes sintering deposit.
Mine tailing 129t accounts for 43% of 300t raw ore.
Embodiment 2:
1000t bloodstone main component: Fe:45%, P:2.0%, SiO
2: 20%
Execute natural silica removal Dephosphorising agent and Fe:52%, P:0.4%, SiO after twice flotation
2: 5%
Through roughly select spiral chute, carefully select the spiral chute sorting after, Fe:60%, P:0.26%, SiO
2: 4.2%.
Scan Fe:63%P:0.1%, SiO by shaking table
2: 3.5%.
At last, obtain concentrate 500t.
Wherein one-level concentrate 316.7t accounts for 63.33% of 500t concentrate, Fe:63%, P:0.1%, SiO
2: 3.5%, (superstate standard)
Second concentrate powder 133.33t accounts for 26.67% of 500t concentrate, Fe:60%, P:0.28%, SiO
2: 4%, (national standard)
Mix and utilize chats 50t, account for 10% of 500t concentrate, Fe:56%, P:0.3%, SiO
2: 4.5% mixing utilizes sintering deposit.
Mine tailing 430t accounts for 43% of 1000t raw ore.
Embodiment 3:
3000t bloodstone main component: Fe:45%, P:2.2%, SiO
2: 22%
Execute natural silica removal Dephosphorising agent and Fe:53%, P:0.44%, SiO after twice flotation
2: 5.5%
Through roughly select spiral chute, carefully select the spiral chute sorting after, Fe:60%, P:0.28%, SiO
2: 4.2%.
Scan Fe:63%P:0.1%, SiO by shaking table
2: 3.5%.
At last, obtain concentrate 1500t.
Wherein one-level concentrate 950t accounts for 63.33% of 1500t concentrate, Fe:63%, P:0.1%, SiO
2: 3.5%, (superstate standard)
Second concentrate powder 400t accounts for 26.67% of 1500t concentrate, Fe:60%, P:0.26%, SiO
2: 3.9%, (national standard)
Mix and utilize chats 150t, account for 10% of 1500t concentrate, Fe:56%, P:0.3%, SiO
2: 4.6% mixing utilizes sintering deposit.
Mine tailing 1290t accounts for 43% of 3000t raw ore.
Claims (17)
1. one kind comprises that ore reduction screening, grind grading, Dephosphorising agent handle the high-phosphorus hematite ore-dressing technique with float glass process ore dressing, breeze classification, it is characterized in that in turn will imposing Dephosphorising agent behind high-phosphorus hematite ore reduction screening, the grind grading, and the flotation of process two-stage reaches the purpose of dephosphorization silica removal, unite again utilization spiral chute and shaking table carry out the roughly selecting of breeze, selected, scan, smelting process requires goes into the stove iron ore thereby the content that improves the iron grade and reduce element phosphor, silicon is to obtain to meet.
2. the technology of claim 1, it is characterized in that the classification in the described grind grading step utilizes the conventional classification string partition level except comprising, also comprise the classification of being undertaken by the high frequency sieve, and ore particles had both been pressed the physical dimension classification in screening/classification process, have sorting again, with the order degree and the uniformity of control ore particles.
3. the technology of claim 2 is characterized in that described order degree is that 95% ore particles is not less than 180 orders.
4. the technology of claim 3 is characterized in that described order degree is that 95% ore particles is 200 orders.
5. the technology of claim 1 is characterized in that described Dephosphorising agent is handled and the float glass process beneficiation steps is carried out in tank diameter and multicomponent level flotation cell.
6. the technology of claim 5 is characterized in that described multicomponent level flotation cell comprises second group of flotation cell that being used to of being used in combination carries out first group of flotation cell of flotation and be used for reverse flotation.
7. the technology of claim 5 is characterized in that described Dephosphorising agent is handled and the float glass process beneficiation steps adopts the multiple spot addition method that adds the single-point addition method of whole Dephosphorising agents or add Dephosphorising agent in tank diameter in tank diameter and multicomponent level flotation cell.
8. the technology of claim 7, the addition that it is characterized in that described Dephosphorising agent is 1-5 kilogram Dephosphorising agent/ton hematite ore.
9. the technology of claim 8, the addition that it is characterized in that described Dephosphorising agent is 1.5-2.5 kilogram Dephosphorising agent/ton hematite ore.
10. the technology of claim 9, the addition that it is characterized in that described Dephosphorising agent is 1.85 kilograms of Dephosphorising agents/ton hematite ore.
11. the technology of claim 7, it is characterized in that described Dephosphorising agent is handled and the float glass process beneficiation steps comprises the Dephosphorising agent that adds 30 weight %-50 weight % in tank diameter, amount to the Dephosphorising agent of 25 weight %-35 weight % to the single groove supply of the first group of flotation cell classification that is used for carrying out flotation, and amount to the Dephosphorising agent of 25-35 weight % to the single groove supply of second group of flotation cell classification that is used for carrying out reverse flotation.
12. the technology of claim 11 is characterized in that described Dephosphorising agent is handled and the float glass process beneficiation steps comprises the Dephosphorising agent that adds 40 weight % in tank diameter.
13. the technology of claim 11 is characterized in that described Dephosphorising agent is handled with the float glass process beneficiation steps and comprises the Dephosphorising agent that amounts to 30 weight % to the single groove supply of first group of flotation cell classification that is used for carrying out flotation.
14. the technology of claim 11 is characterized in that described Dephosphorising agent is handled with the float glass process beneficiation steps and comprises the Dephosphorising agent that amounts to 30 weight % to the single groove supply of second group of flotation cell classification that is used for carrying out reverse flotation.
15. each technology among the claim 1-14 is characterized in that described Dephosphorising agent is selected from chemical Dephosphorising agent and natural Dephosphorising agent.
16. the technology of claim 15 is characterized in that described Dephosphorising agent is selected from natural Dephosphorising agent.
17. the technology of claim 15 is characterized in that described natural Dephosphorising agent comprises grease 50-90 weight %, in the soap 4-20 weight % and the free organic acids 2-15 weight % of C18 odium stearate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710138275A CN100592933C (en) | 2006-07-31 | 2007-07-31 | Novel rhombohedral iron ore beneficiation technics |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610104007.3 | 2006-07-31 | ||
| CN200610104007 | 2006-07-31 | ||
| CN200710138275A CN100592933C (en) | 2006-07-31 | 2007-07-31 | Novel rhombohedral iron ore beneficiation technics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101116841A CN101116841A (en) | 2008-02-06 |
| CN100592933C true CN100592933C (en) | 2010-03-03 |
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| US10207275B2 (en) | 2012-10-26 | 2019-02-19 | Vale S.A. | Iron ore concentration process with grinding circuit, dry desliming and dry or mixed (dry and wet) concentration |
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