CN102010987B - Vanadium and titanium pellet ore production process - Google Patents
Vanadium and titanium pellet ore production process Download PDFInfo
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- CN102010987B CN102010987B CN201010605253A CN201010605253A CN102010987B CN 102010987 B CN102010987 B CN 102010987B CN 201010605253 A CN201010605253 A CN 201010605253A CN 201010605253 A CN201010605253 A CN 201010605253A CN 102010987 B CN102010987 B CN 102010987B
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Abstract
The invention discloses a vanadium and titanium pellet ore production process, which is used for producing by using a drying grate and a rotary kiln and has the characteristic of lowering energy consumption in the process. The vanadium and titanium pellet ore production process comprises the following steps of: mixing iron ore concentrate and bentonite so as to obtain a mixture; and adding an oxidation heat liberation auxiliary material into the mixture. Due to the addition of the oxidation heat liberation auxiliary material, the baking temperature of the rotary kiln can be lowered from 1,280DEG C to about 1,180 DEG C, the compressive strength of pellet ore reaches over 1,800 N/piece, drum index reaches over 90 percent and the energy consumption in a rotary kiln process is lowered by about 11 kgCe/t; simultaneously, ring formation of the rotary kiln can be reduced, the operation rate of main body equipment reaches over 90 percent and the production process is particularly suitable to be popularized and applied to the production of vanadium and titanium pellet ore.
Description
Technical field
The present invention relates to a kind of production technique of pellet, be specifically related to a kind of vanadium titanium globe ore production technology that adopts chain grate machine, rotary kiln to produce.
Background technology
Chain grate machine-rotary kiln production technique is a kind of main production of current domestic and international production pellet; Pellet roasting is fixed to be that green-ball is under high temperature action; Through the solid particle diffusion, form cross structure and a small amount of liquid phase and be bonded together solid particulate, make it to have the process of sufficient mechanical strength.
Calcining process is that pellet is produced one of the most key link, and the roasting system not only has influence on output, the quality of pellet, also has influence on indexs such as process energy consumption, service life of equipment, equipment operation rate.Under the certain situation of roasting time, the maturing temperature height directly has influence on the consolidation rate and the final strength of pellet.Generally, domestic common magnet pellet ore rotary kiln maturing temperature is about 1250 ℃, and the calcining process energy consumption is about 28KgCe/t, and the main equipment operating rate is about 90%.The pelletizing plant's vanadium titanium globe ore rotary kiln design maturing temperature that has at present is 1250～1300 ℃, and the rotary kiln baking temperature-averaging is at 1280 ℃.From production practice, pellet quality all reaches and surpasses specification of quality, but high-temperature service causes process energy consumption and equipment failure rate higher, and ring formation of rotary kiln is serious.Its average annual process energy consumption is up to 38.5KgCe/t, and is higher than level of the same trade; The main equipment operating rate is 86%, is lower than this kind equipment M.L.; High-temperature roasting causes ring formation of rotary kiln serious, and ring formation thing material structure is fine and close in the kiln, intensity is big, and it is fixed liquid phase to occur, needs regularly to shut down artificial the removing, and cost is high, dangerous big, and kiln lining is destroyed serious.
Summary of the invention
Technical problem to be solved by this invention provides a kind of vanadium titanium globe ore production technology capable of reducing energy consumption.
The technical solution adopted for the present invention to solve the technical problems is: the vanadium titanium globe ore production technology comprises the steps:
A, iron ore concentrate mixed with wilkinite form compound;
B, the compound that iron ore concentrate and wilkinite are formed are put into the drying machine drying, and the mass percentage content that makes moisture in the compound is 7.5～8.5%;
C, dried compound get into pelletizer and make the ball exercise work behind the profit grinding system;
D, the green-ball that obtains through pelletizer are transported to chain grate machine and carry out drying, preheating;
E, get into rotary kiln through the green-ball of super-dry, preheating and carry out the fixed formation pellet of high-temperature roasting;
F, the pellet of fixed formation after the high-temperature roasting is transported to central cooler cools off;
It is characterized in that: mix adding oxidation heat liberation auxiliary material in the compound that forms with wilkinite at iron ore concentrate among the step a.
As preferred version, said oxidation heat liberation auxiliary material is the mixture of steel-smelting sewage sludge and containing metal iron ore concentrate.
Further be that the mass percent of said oxidation heat liberation auxiliary material in compound is 2%～5%.
Further be, the green-ball that obtains among the step c gets into the green-ball sieve apparatus and sieves, and the green-ball of particle diameter between 8～16mm gets in the d step and carry out drying, preheating, and makes particle diameter less than 8mm or send into pelletizer greater than the green-ball of 16mm and carry out secondary and make ball exercise and do.
Further be, get into the d step and carry out in the green-ball of drying, preheating that the quantity of particle diameter green-ball between 8～12mm is greater than 70%.
Further be the green-ball that obtains among the step c, mass percent≤9.3% that its moisture is shared.
Further be, making in the ball exercise work in step c adds reinforcer, and the mass percent of said reinforcer is 0.25%～0.32%.
Further be; Chain grate machine in the steps d comprises two sections of blasting drying period, down-draft drying zone, preheated one-section and preheatings, and the fabric thickness of green-ball in chain grate machine is 180 ± 20mm, and the chain grate machine machine speed is controlled at 0.15～2.35m/min; The temperature of said blasting drying period petticoat pipe is controlled at 50～100 ℃; The temperature of down-draft drying zone petticoat pipe is controlled at 150～300 ℃, and the temperature of preheated one-section petticoat pipe is controlled at 600～850 ℃, and the temperature of two sections petticoat pipes of preheating is controlled at 850～1000 ℃.
Further be, the central cooler among the step f comprise the ring cold one section, the ring cold two sections with the ring cold three sections, the cold one section air quantity of said ring is controlled at 90000～100000m
3/ h.
The invention has the beneficial effects as follows: can the maturing temperature of rotary kiln be reduced to about 1180 ℃ by 1280 ℃, the ultimate compression strength of pellet reaches more than 1800N/, and tumbler index reaches more than 90%, about rotary kiln process energy consumption decline 11KgCe/t; Simultaneously can also reduce ring formation of rotary kiln, the main equipment operating rate reaches more than 90%, is particluarly suitable for applying in the production in vanadium titanium globe ore deposit.
Figure of description
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
As shown in Figure 1, vanadium titanium globe ore production technology of the present invention comprises the steps:
A, iron ore concentrate mixed with wilkinite form compound;
B, the compound that iron ore concentrate and wilkinite are formed are put into the drying machine drying, and the mass percentage content that makes moisture in the compound is 7.5%～8.5%; What make that it satisfies subsequent handling makes the ball requirement.
C, dried compound get into pelletizer and make the ball exercise work behind the profit grinding system;
D, the green-ball that obtains through pelletizer are transported to chain grate machine and carry out drying, preheating; For green-ball is got ready at the revolution roasting in kilns.
E, get into rotary kiln through the green-ball of super-dry, preheating and carry out the fixed formation pellet of high-temperature roasting; In roasting process, should guarantee that oxidizing atmosphere is abundant in the rotary kiln, be beneficial to carrying out fast of pelletizing reaction.
F, the pellet of fixed formation after the high-temperature roasting is transported to central cooler cools off;
It is characterized in that, mix adding oxidation heat liberation auxiliary material in the compound that forms with wilkinite at iron ore concentrate among the step a.After adding the oxidation heat liberation auxiliary material, then in the high-temperature roasting consolidation process in step e, can make that pellet is inner, and exothermic oxidation reaction takes place, pellet is inner to produce bigger heat thereby make, and can guarantee that pellet grills thoroughly fully, does not have kernel.Therefore, after adding the oxidation heat liberation auxiliary material, can the high-temperature roasting temperature of rotary kiln be reduced to about 1180 ℃; Can guarantee that equally pellet intensity after high-temperature roasting can not descend; Simultaneously, can also reduce process energy consumption, make about rotary kiln process energy consumption decline 11KgCe/t.
In addition, in actual production, because green-ball is before the chain grate machine that gets into the d step carries out drying, preheating; Need have bad luck halfway; Generally having bad luck number of times is 5 times, breaks in the process of having bad luck for preventing green-ball, need in the c step, control balling disk (-sc) rotating speed: 7～8r/min, balling disk (-sc) inclination angle: 46～48 °, feed: 25t/h (being speed 1.5m/s); Add the water mode: the balling-up district adds drips the shape water conservancy in forming mother bulb; Add spray water xi in the district of growing up and be beneficial to mother bulb rolling adhered materials and grow up, big or small scraper cooperates and closely is as the criterion just to wipe bed material off, makes the dropping strength of the green-ball that obtains in the c step reach 5 times/0.5m and (green-ball is highly freely fallen on the thick steel plate of 10mm in 0.5m; Afterwards break promptly the dropping strength of this ball is (n-1) inferior/0.5m if fall n time.10 green-balls of each survey are averaged as the dropping strength of green-ball).
In aforementioned embodiments, said oxidation heat liberation auxiliary material can adopt the raw material that all can oxidation heat liberation in oxidation reaction process, as being prone to take place the metal of oxidizing reaction.As optimal way, said oxidation heat liberation auxiliary material is the mixture of steel-smelting sewage sludge and containing metal iron ore concentrate.Steel-smelting sewage sludge is during steel-making converter is produced, the dedusting dust that is produced; The containing metal iron ore concentrate is a kind of slag iron that produces in producing of smelting iron, a kind of containing metal iron ore concentrate that obtains after the wearable choosing.Contain a large amount of FeO materials in the mixture of steel-smelting sewage sludge and containing metal iron ore concentrate, can make in oxidising process that pellet is inner to produce bigger heat, when reducing maturing temperature, pelletizing inside can the oxidation gain of heat; Moreover high FeO material is prone to produce the lower melting point liquid phase, increase pelletizing bonding phasor, the consolidation strength of reinforcement pelletizing.For guaranteeing the quality of pellet, the mass percent of said oxidation heat liberation auxiliary material in compound is 2%～5%.
In above embodiment; The green-ball particle diameter that the entering chain grate machine carries out drying, preheating can be any size; But in order further to reduce process energy consumption; The green-ball that obtains among the step c gets into the green-ball sieve apparatus and sieves, and the green-ball of particle diameter between 8～16mm gets in the d step and carry out drying, preheating, and makes particle diameter less than 8mm or send into pelletizer greater than the green-ball of 16mm and carry out secondary and make ball exercise and do.Promptly getting into the green-ball particle diameter that chain grate machine carries out drying, preheating is controlled between 8～16mm; And being preferably in the entering chain grate machine carries out in the green-ball of drying, preheating; Particle diameter is controlled at greater than 70% in the quantity of green-ball between 8～12mm (quantity of establishing the green-ball between 8～16mm is A; The quantity of green-ball is B between 8～12mm, and B/A should be greater than 70%).This particle size range can be made bead technology through pelletizer and obtain, and when the green-ball entering rotary kiln of this particle size range carries out roasting, can reduce the roasting time of rotary kiln, thereby can reduce process energy consumption greatly; In addition, compare, under the identical situation of roasting time, can make the roasting effect of green-ball better with the green-ball of other particle size range.
In above embodiment, for obtaining the more green-ball of good quality, as preferred mode, the green-ball that in step c, obtains, the mass percent that its moisture is shared is controlled at≤and 9.3%.Because green-ball moisture height will cause cracking temperature of green pellet to reduce; Produce a large amount of powder, be prone to cause the serious intensity reduction with pellet of ring formation of rotary kiln, and with moisture controlled≤9.3%; Can improve the quality of green-ball greatly, prevent that ring formation of rotary kiln is serious in the after baking process.
In above embodiment, in order to prevent ring formation of rotary kiln, making in the ball exercise work in step c adds reinforcer (a kind of crystal water huge legendary turtle compound of inorganic molysite), and the mass percent of said reinforcer is 0.25%～0.32%.Then in making the ball process, can improve and make the ball effect, can reduce the amount of powder that enters into rotary kiln, for the ring formation that reduces rotary kiln provides favourable guarantee; Simultaneously, after adding reinforcer, can improve cracking temperature of green pellet, reduce green-ball explosion amount, can make drying, preheating temperature in the steps d improve 30～100 ℃, thereby improve the drying and preheating effect of pellet, be beneficial to the roasting of pellet.
On the basis of above-mentioned embodiment; Chain grate machine in the steps d comprises two sections of blasting drying period, down-draft drying zone, preheated one-section and preheatings; The fabric thickness of green-ball in chain grate machine is 180 ± 20mm; The chain grate machine machine speed is controlled at 0.15～2.35m/min, and the temperature of said blasting drying period petticoat pipe is controlled at 50～100 ℃, and the temperature of down-draft drying zone petticoat pipe is controlled at 150～300 ℃; The temperature of preheated one-section petticoat pipe is controlled at 600～850 ℃, and the temperature of two sections petticoat pipes of preheating is controlled at 850～1000 ℃.Temperature value more of the prior art; The temperature of blasting drying period petticoat pipe has improved 10～20 ℃, and the temperature of down-draft drying zone petticoat pipe has improved 50～100 ℃, and the temperature of preheated one-section petticoat pipe has improved 50～100 ℃; Can guarantee drying, the pre-heat effect of green-ball, improve the quality of pellet.
Be the better quality that improves pellet, the central cooler among the step f comprise cold one section of ring, ring cold two sections with cold three sections of ring, the cold one section air quantity of said ring is controlled at 90000～100000m
3/ h.Compared with prior art, reduced and encircled cold one section air quantity, can prevent that the height of center warm area temperature decline of pelletizing is too fast, thereby be beneficial to the further oxidation of height of center warm area of pelletizing.
Embodiment:
| Sequence number | 1 | 2 | 3 | 4 |
| Oxidation heat liberation auxiliary material mass percent (%) | 5 | 4 | 3 | 2 |
| Reinforcer mass percent (%) | 0.25 | 0.28 | 0.30 | 0.32 |
| Get into the green-ball particle diameter (mm) of chain grate machine inner drying | 10 | 11 | 12 | 12 |
| The fabric thickness (mm) of green-ball in chain grate machine | 175 | 182 | 190 | 200 |
| Chain grate machine machine speed (m/min) | 2.12 | 2.18 | 2.10 | 2.25 |
| Blasting drying period petticoat pipe temperature (℃) | 55 | 65 | 72 | 83 |
| Down-draft drying zone petticoat pipe temperature (℃) | 210 | 230 | 240 | 251 |
| Preheated one-section petticoat pipe temperature (℃) | 651 | 695 | 674 | 710 |
| Two sections petticoat pipe temperature of preheating (℃) | 910 | 920 | 930 | 945 |
| The rotary kiln baking temperature (℃) | 1185 | 1182 | 1186 | 1190 |
| The ultimate compression strength of pellet (N/) | 1856 | 1921 | 1945 | 1911 |
| Rotary kiln process energy consumption (KgCe/t) | 26.5 | 26.9 | 27.1 | 27.3 |
| Main equipment operating rate (%) | 93.3 | 92.9 | 94.8 | 92.7 |
Claims (8)
1. the vanadium titanium globe ore production technology comprises the steps:
A, iron ore concentrate mixed with wilkinite form compound, mixes adding oxidation heat liberation auxiliary material in the compound of formation with wilkinite at iron ore concentrate;
B, the compound that iron ore concentrate and wilkinite are formed are put into the drying machine drying, and the mass percentage content that makes moisture in the compound is 7.5%～8.5%;
C, dried compound get into pelletizer and make the ball exercise work behind the profit grinding system;
D, the green-ball that obtains through pelletizer are transported to chain grate machine and carry out drying, preheating;
E, get into rotary kiln through the green-ball of super-dry, preheating and carry out the fixed formation pellet of high-temperature roasting;
F, the pellet of fixed formation after the high-temperature roasting is transported to central cooler cools off;
It is characterized in that: making in the ball exercise work in step c adds reinforcer, and the mass percent of said reinforcer is 0.25% ~ 0.32%, and wherein said reinforcer is a kind of crystal water huge legendary turtle compound of inorganic molysite.
2. vanadium titanium globe ore production technology as claimed in claim 1 is characterized in that: said oxidation heat liberation auxiliary material is the mixture of steel-smelting sewage sludge and containing metal iron ore concentrate.
3. vanadium titanium globe ore production technology as claimed in claim 2 is characterized in that: the mass percent of said oxidation heat liberation auxiliary material in compound is 2% ~ 5%.
4. vanadium titanium globe ore production technology as claimed in claim 3; It is characterized in that: the green-ball that obtains among the step c gets into the green-ball sieve apparatus and sieves; The green-ball of particle diameter between 8～16mm gets in the d step and carries out drying, preheating, and makes particle diameter less than 8mm or send into pelletizer greater than the green-ball of 16mm and carry out secondary and make ball exercise and do.
5. vanadium titanium globe ore production technology as claimed in claim 4 is characterized in that: get into the d step and carry out in the green-ball of drying, preheating, the quantity of particle diameter green-ball between 8～12mm is greater than 70%.
6. vanadium titanium globe ore production technology as claimed in claim 5 is characterized in that: the green-ball that obtains among the step c, mass percent≤9.3% that its moisture is shared.
7. vanadium titanium globe ore production technology as claimed in claim 1; It is characterized in that: the chain grate machine in the steps d comprises two sections of blasting drying period, down-draft drying zone, preheated one-section and preheatings; The fabric thickness of green-ball in chain grate machine is 180 ± 20mm; The chain grate machine machine speed is controlled at 0.15～2.35m/min, and the temperature of said blasting drying period petticoat pipe is controlled at 50～100 ° of C, and the temperature of down-draft drying zone petticoat pipe is controlled at 150～300 ° of C; The temperature of preheated one-section petticoat pipe is controlled at 600～850 ° of C, and the temperature of two sections petticoat pipes of preheating is controlled at 850～1000 ° of C.
8. vanadium titanium globe ore production technology as claimed in claim 1 is characterized in that: the central cooler among the step f comprise the ring cold one section, the ring cold two sections with the ring cold three sections, the cold one section air quantity of said ring is controlled at 90000～100000m
3/ h.
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| CN110878388A (en) * | 2019-11-29 | 2020-03-13 | 四川大裂谷钒业有限公司 | Method for roasting vanadium-containing material by using chain grate and rotary kiln |
| CN111676368B (en) * | 2020-06-19 | 2021-05-18 | 太原钢铁(集团)有限公司 | Pellet production method for reducing agglomeration proportion of pellets |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101003851A (en) * | 2006-09-22 | 2007-07-25 | 攀钢集团钢城企业总公司球团厂 | Method for producing high titanium type acid pellet vanadium titanium by chain grate - rotary kiln |
-
2010
- 2010-12-24 CN CN201010605253A patent/CN102010987B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101003851A (en) * | 2006-09-22 | 2007-07-25 | 攀钢集团钢城企业总公司球团厂 | Method for producing high titanium type acid pellet vanadium titanium by chain grate - rotary kiln |
Non-Patent Citations (1)
| Title |
|---|
| 张永康.钒钛球团矿低温焙烧工艺探索与实践.《烧结球团》.2010,第35卷(第6期),17-23. * |
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