CN1766129A - Titanium ore cold briquetting for protecting blast furnace and its production method - Google Patents
Titanium ore cold briquetting for protecting blast furnace and its production method Download PDFInfo
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- CN1766129A CN1766129A CN 200410067669 CN200410067669A CN1766129A CN 1766129 A CN1766129 A CN 1766129A CN 200410067669 CN200410067669 CN 200410067669 CN 200410067669 A CN200410067669 A CN 200410067669A CN 1766129 A CN1766129 A CN 1766129A
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- briquetting
- blast furnace
- binding agent
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Abstract
The chill-pressing titanium block to protect blast furnace comprises: 90-98% titanium powder, 2-10wt% composite adhesive composed of cement, polyvinyl alcohol and phosphodiester by proportion as 4-8:1-5:0-1; wherein, cement: cellulose is 5-10:1-5,epoxy resin:sodium humate is 8-10:0-2, waste molasses liquid:lime hydrate is 7-10:0-3, and waterglass:bentonite:silicasol is 7-10:0-2:0-1. The preparation method comprises: mixing material with adhesive, rolling, covering tightly the material, pressing to form; screening the crude block to re-press the powder less than 10mmm and form product. Compared with prior art, this invention increases mechanical strength, and reduces greatly the powder rate when screening powder.
Description
Technical field
The present invention relates to ferrous metallurgy, particularly a kind of production method of titanium ore cold briquetting for protecting blast furnace.
Background technology
The titaniferous cold bound pellet is as a kind of novel blast furnace protecting raw material, and how tame Steel Plant use.But find that existing titaniferous briquetting is at TiO
2There is bigger problem in aspects such as content, blast furnace groove powder unloading rate, RDI, hot strength.Cause blast furnace K value during this period to rise 0.2 thus, and have titanium valve to stick on the furnace wall.
China Patent No. 93103638.0 discloses " high Ti cold curing pellet ", it adopts low-temperature concretion technology to replace high-temperature concretion technology, produce high Ti cold curing pellet, use the smart powder of titaniferous amount 33～40%, granularity-200 order, 22～26%, the moisture content titanium below 2% to be raw material, with addition of mineral binder bond-water glass 8% or compound binding agent (water glass rosin) through batch mixing, high Ti cold curing pellet is produced in pressure ball and cryodrying, and intensity 3100N/～5500N/ is individual.
In sum, there is bigger problem in the titaniferous briquetting at aspects such as powder rate (being cold strength), RDI, hot strengths, and it is bad that its root just is to produce the binder formula and the production technique of titaniferous briquetting.
Summary of the invention
The object of the present invention is to provide a kind of titanium ore cold briquetting for protecting blast furnace and production method thereof, produce the furnace retaining titanium ore cold briquetting that a kind of physical strength and high temperature metallurgical properties satisfy the technical requirements of large, medium and small type blast furnace technology comprehensively, realization substitutes import higher-grade titanium lump ore fully with titanium ore cold briquetting and comes furnace retaining, thereby reaches the final purpose that reduces molten iron cost and widen the furnace retaining raw material range.
For achieving the above object, technical scheme of the present invention is,
Key problem in technology of the present invention is to seek that performance is good, price is low, blast furnace ironmaking process is had no side effect binding agent and best molding technological condition.This is because the cold strength of finished product titaniferous briquetting and performance that high temperature metallurgical properties depends primarily on binding agent and the quality of molding technological condition.
Technical scheme of the present invention is, a kind of titanium ore cold briquetting for protecting blast furnace, with perovskite powder (the comprise titanium lump ore minus sieve) raw material-perovskite powder 90～98% of granularity less than 8mm, add any in following five kinds of compound binding agents, this compound binding agent is 2～10wt% of raw material total amount, requires the moisture of perovskite powder raw material to be lower than 8%.
Consisting of of compound binding agent one: cement: polyvinyl alcohol: phosphodiester=4～8: 1～5: 0～1.
Consisting of of compound binding agent two: cement: Mierocrystalline cellulose (spent pulping liquor or starch or xylogen)=5～10: 1～5.
Consisting of of compound binding agent three: Resins, epoxy: sodium humate=8～10: 0～2.
Consisting of of compound binding agent four: honey waste liquid: slaked lime=7～10: 0～3.
Consisting of of compound binding agent five: water glass: bentonite: silicon sol=7～10: 0～2: 0～1.
Production method of the present invention is with the perovskite powder raw material of batching and the compound that compound binding agent is formed at first mix according to a certain ratio, then roll, shelving is 0.5～2 hour then, shelving can make binding agent fully wetting with perovskite powder, contact and react, vexed good material is carried out compound stalk forming, the green briquette of compacting sieves earlier, to return briquetting press briquetting again less than the powder of 10mmm, greater than the green briquette drying of 10mmm 1～2 hour, or natural curing 7～28 days, promptly obtain finished product titaniferous briquetting, the granularity of finished product briquetting is 10～50mm.
Beneficial effect of the present invention
Key of the present invention is the binding agent of titaniferous briquetting is improved, and for example adopts the compound binding agent that adds polyvinyl alcohol, and it can obtain high physical strength, satisfies the high mechanical strength requirement of big blast furnace production to furnace charge.Compare with the titaniferous briquetting that the Baosteel blast furnace is originally on probation, owing to significantly improving of physical strength, the powder rate generating capacity when the titaniferous briquetting that the inventive method is produced sieves powder under transhipment, blast furnace groove has significantly reduced.The purpose that adds phosphoric acid ester is in order to improve the hot strength of titaniferous briquetting, to add phosphoric acid ester and compare with not adding phosphoric acid ester, and the Pulverization ratio after 900 ℃ of reduction can reduce (absolute value) more than 10%.The addition of compound binding agent is controlled in 8%, brings too much gangue content and detrimental impurity into to avoid binding agent.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Referring to Fig. 1, through test of many times, the kind of research perovskite powder, granularity and moisture, the mixing of perovskite powder and roll mode and processing condition such as forming pressure to the influence of finished product titaniferous briquetting quality, optimization perovskite powder agglomeration process of the present invention is as follows:
With the perovskite powder raw material of batching and the compound that compound binding agent is formed at first mix with intensive mixer according to a certain ratio, then roll, shelving is 0.5～2 hour then, shelving can make binding agent and perovskite powder fully wetting, contact and reaction, the vexed good material pair roller compound stalk forming machine that is equipped with the screw press feeding machine of packing into is carried out briquetting, adopting pressure is the pair roller briquetting press compound stalk forming of 10～100MPa, the effect of screw press feeding machine is the degree of compactness that improves feed, thereby improve the one-tenth piece rate and the intensity of green briquette, the green briquette of compacting sieves earlier, to return briquetting press briquetting again less than the powder of 10mmm, green briquette greater than 10mmm was dried 1～2 hour through low temperature (150～200 ℃), or natural curing 7～28 days, promptly obtaining finished product titaniferous briquetting, the granularity of finished product briquetting is 10～50mm.
Embodiment 1:
Baosteel is cooperated with Shanghai Australia precious industry and trade company limited, adopt the briquetting production unit and the place of Shanghai Australia precious industry and trade company limited, adopt the Canadian titanium lump ore minus sieve in Chengde concentrated ilmenite and the Baosteel stock ground to make test raw material, adopt above-mentioned compound binding agent one to make binding agent, the titaniferous briquetting that is numbered " Australia precious titanium ball 0762-2 " has been manufactured experimently in production, and its salient features is as follows:
TiO
2 28.7％，TFe 33.1％；
JIS barrate strength 75.7%, approaching with the Baosteel sinter strength;
RDI (Japanese enterprises standard) is 24.3%, is better than the RDI index of Baosteel agglomerate, also is better than certain factory's titaniferous briquetting that the Baosteel blast furnace was tried out between in October, 1999 to December, and its RDI is 45.0%;
The Pulverization ratio index is 30.3% after 900 ℃ of reduction, significantly is better than the titaniferous briquetting that the Baosteel blast furnace was tried out between in October, 1999 to December, and the Pulverization ratio index is 58.7% after its 900 ℃ of reduction.
On the whole, the titaniferous briquetting that the present invention produced has good physical strength and metallurgical performance index, significantly be better than certain factory's titaniferous briquetting that the Baosteel blast furnace is tried out between in October, 1999 to December, satisfied the specification of quality of large blast furnace substantially the furnace retaining raw material.The inventive method has realized that substituting import higher-grade titanium lump ore fully with titanium ore cold briquetting comes furnace retaining, thereby can reduce the furnace retaining cost, obtains remarkable economic efficiency; Widened the source range that comes of furnace retaining raw material simultaneously.
Embodiment 2:
No. 2 blast furnaces of Baosteel bring into use the precious titaniferous briquetting of the Australia that is produced by the present invention to climb western titanium lump ore with displacement.Its chemical ingredients and metallurgical performance index are shown in following table 1 and table 2.
The chemical ingredients of the precious titaniferous briquetting of table 1 Australia, %
| Kind | TFe | SiO 2 | Al 2O 3 | MgO | TiO 2 | CaO | P 2O 5 | S |
| Australia's treasured | 31.87 | 8.36 | 3.69 | 2.05 | 28.56 | 7.75 | 0.21 | 1.9 |
The metallurgical performance index of the precious titaniferous briquetting of table 2 Australia, %
| Kind | Barrate strength (TI), % | RDI(550℃)，％ | RDI(900℃)，％ |
| Australia's treasured | 87.54 | 18.0 | 35.62 |
Use through No. 2 blast furnace production of Baosteel, the molten iron yield level of blast furnace is moderate, is 8800t/d; Permeability index is 2.4～2.5; Furnace temperature is kept higher, is 1505～1510 ℃.Blast furnace production practice during this period show: it is normal that titanium is reduced the process that enters molten iron, illustrates that titanium is effectively utilized in stove; Compare with the titanium lump ore, the titaniferous amount of titanium briquetting is higher, helps to reduce the blast furnace quantity of slag.
Other embodiment see Table 3, table 4, and wherein, table 3 is the composition and the embodiment of binding agent; Table 4 is the ratio of components embodiment of perovskite powder and compound binding agent.
The composition of table 3 binding agent and embodiment
| The binding agent composition | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| Compound binding agent | Cement | 80％ | 75％ | 60％ | 50％ | 60％ | 40％ |
| Polyvinyl alcohol | 10％ | 25％ | 40％ | 40％ | 35％ | 50％ | |
| Phosphodiester | 10％ | 5％ | / | 10％ | 5％ | 10％ | |
| Compound binding agent two (1) | Cement | 90％ | 80％ | 70％ | 60％ | 50％ | |
| Spent pulping liquor | 10％ | 20％ | 30％ | 40％ | 50％ | ||
| Compound binding agent two (2) | Cement | 90％ | 80％ | 70％ | 60％ | 50％ | |
| Starch | 10％ | 20％ | 30％ | 40％ | 50％ | ||
| Compound binding agent two (3) | Cement | 90％ | 80％ | 70％ | 60％ | 50％ | |
| Xylogen | 10％ | 20％ | 30％ | 40％ | 50％ | ||
| Compound binding agent | Resins, epoxy | 100％ | 95％ | 90％ | 85％ | 80％ | |
| Sodium humate | / | 5％ | 10％ | 15％ | 20％ | ||
| Compound binding agent four | The honey waste liquid | 70％ | 80％ | 90％ | 100％ | ||
| Slaked lime | 30％ | 20％ | 10％ | / | |||
| Compound binding agent five | Water glass | 70％ | 80％ | 85％ | 90％ | 95％ | 95％ |
| Bentonite | 20％ | 15％ | 12％ | 8％ | 5％ | / | |
| Silicon sol | 10％ | 5％ | 3％ | 2％ | / | 5％ | |
The ratio of components embodiment of table 4 perovskite powder and compound binding agent
| Ratio of components | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | ||
| 1 | The perovskite powder raw material | Ilmenite concentrate | 78％ | 80％ | 65％ | 75％ | 77％ | 80％ |
| The titanium ore minus sieve | 20％ | 16％ | 30％ | 19％ | 15％ | 10％ | ||
| Compound binding agent one | 2％ | 4％ | 5％ | 6％ | 8％ | 10％ | ||
| 2 | The perovskite powder raw material | Ilmenite concentrate | 70％ | 76％ | 85％ | 80％ | 74％ | 75％ |
| The titanium ore minus sieve | 28％ | 20％ | 10％ | 14％ | 18％ | 15％ | ||
| Compound binding agent two (1) | 2％ | 4％ | 5％ | 6％ | 8％ | 10％ | ||
| 3 | The perovskite powder raw material | Ilmenite concentrate | 70％ | 76％ | 85％ | 80％ | 74％ | 75％ |
| The titanium ore minus sieve | 28％ | 20％ | 10％ | 14％ | 18％ | 15％ | ||
| Compound binding agent two (2) | 2％ | 4％ | 5％ | 6％ | 8％ | 10％ | ||
| 4 | The perovskite powder raw material | Ilmenite concentrate | 70％ | 76％ | 85％ | 80％ | 74％ | 75％ |
| The titanium ore minus sieve | 28％ | 20％ | 10％ | 14％ | 18％ | 15％ | ||
| Compound binding agent two (3) | 2％ | 4％ | 5％ | 6％ | 8％ | 10％ | ||
| 5 | The perovskite powder raw material | Ilmenite concentrate | 75％ | 70％ | 85％ | 80％ | 75％ | 85％ |
| The titanium ore minus sieve | 23％ | 26％ | 10％ | 14％ | 17％ | 5％ | ||
| Compound binding agent three | 2％ | 4％ | 5％ | 6％ | 8％ | 10％ | ||
| 6 | The perovskite powder raw material | Ilmenite concentrate | 60％ | 70％ | 80％ | 74％ | 82％ | 70％ |
| The titanium ore minus sieve | 38％ | 26％ | 15％ | 20％ | 10％ | 20％ | ||
| Compound binding agent four | 2％ | 4％ | 5％ | 6％ | 8％ | 10％ | ||
| 7 | The perovskite powder raw material | Ilmenite concentrate | 68％ | 71％ | 75％ | 79％ | 82％ | 82％ |
| The titanium ore minus sieve | 30％ | 25％ | 20％ | 15％ | 10％ | 8％ | ||
| Compound binding agent five | 2％ | 4％ | 5％ | 6％ | 8％ | 10％ | ||
In the present invention iron and steel enterprise at home and even in the worldwide iron industry wide promotional value and application prospect are arranged, can widen the source range that comes of furnace retaining raw material, the furnace retaining cost of titaniferous furnace charge that reduces large-scale, medium-sized and small blast furnace.
Claims (13)
1. titanium ore cold briquetting for protecting blast furnace, it forms mass percent,
Perovskite powder 90～98%
Compound binding agent 2～10%;
Wherein, described binding agent is: cement: polyvinyl alcohol: phosphodiester=4～8: 1～5: 0～1.
2. titanium ore cold briquetting for protecting blast furnace, it forms mass percent,
Perovskite powder 90～98%
Compound binding agent 2～10%;
Wherein, described binding agent is: cement: Mierocrystalline cellulose=5～10: 1～5.
3. titanium ore cold briquetting for protecting blast furnace as claimed in claim 2 is characterized in that, described Mierocrystalline cellulose is spent pulping liquor or starch or xylogen.
4. titanium ore cold briquetting for protecting blast furnace, it forms mass percent,
Perovskite powder 90～98%
Compound binding agent 2～10%;
Wherein, described binding agent: Resins, epoxy: sodium humate=8～10: 0～2.
5. titanium ore cold briquetting for protecting blast furnace, it forms mass percent,
Perovskite powder 90～98%
Compound binding agent 2～10%;
Wherein, described binding agent: honey waste liquid: slaked lime=7～10: 0～3.
6. titanium ore cold briquetting for protecting blast furnace, it forms mass percent,
Perovskite powder 90～98%
Compound binding agent 2～10%;
Wherein, described binding agent: water glass: bentonite: silicon sol=7～10: 0～2: 0～1.
7. as claim 1 or 2 or 4 or 5 or 6 described titanium ore cold briquetting for protecting blast furnace, it is characterized in that the granularity of described perovskite powder is less than 8mm.
8. as claim 1 or 2 or 4 or 5 or 6 described titanium ore cold briquetting for protecting blast furnace, it is characterized in that described perovskite powder comprises ilmenite concentrate, titanium ore minus sieve.
9. as claim 1 or 2 or 4 or 5 or 6 described titanium ore cold briquetting for protecting blast furnace, it is characterized in that the moisture of perovskite powder raw material is lower than 8%.
10. the production method of a titanium ore cold briquetting for protecting blast furnace, with the perovskite powder raw material of batching and the compound that compound binding agent is formed at first mix according to a certain ratio, then roll, shelving is 0.5～2 hour then, make binding agent fully wetting with perovskite powder, contact and react; The vexed good material compound stalk forming machine of packing into is carried out briquetting, the green briquette of compacting sieves earlier, will return briquetting press briquetting again less than the powder of 10mmm, dries through 1～2 hour greater than the green briquette of 10mmm, or natural curing 7～28 days, promptly obtain finished product titaniferous briquetting.
11. the production method of titanium ore cold briquetting for protecting blast furnace as claimed in claim 10 is characterized in that, described moulding pressure is 10～100Mpa.
12. the production method of titanium ore cold briquetting for protecting blast furnace as claimed in claim 10 is characterized in that, bake out temperature is 150～200 ℃.
13. the production method of titanium ore cold briquetting for protecting blast furnace as claimed in claim 10 is characterized in that, the granularity of finished product briquetting is 10～50mm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665868B (en) * | 2009-07-30 | 2011-04-27 | 山西太钢不锈钢股份有限公司 | Method for utilizing stainless steel removed dust as ironmaking raw material |
| CN101613616B (en) * | 2009-07-31 | 2011-12-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Coke for furnace protection and preparation method thereof |
| CN102746913A (en) * | 2011-04-21 | 2012-10-24 | 宝山钢铁股份有限公司 | Moulding method of moulded coal used for smelting-reduction ironmaking |
| CN105907958A (en) * | 2016-05-10 | 2016-08-31 | 江苏省冶金设计院有限公司 | Composite binder and application of composite binder to water-bearing copper slag pelletizing |
| CN106086401A (en) * | 2016-06-23 | 2016-11-09 | 北京科技大学 | A kind of method inorganic polymer being applied in iron mineral powder agglomeration technique |
| CN110295282A (en) * | 2019-07-24 | 2019-10-01 | 深圳市中金岭南有色金属股份有限公司 | A kind of blast furnace returning charge briquetting technique |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6280230A (en) * | 1985-10-01 | 1987-04-13 | Kobe Steel Ltd | Unfired high-titanium pellet |
| CN1035887C (en) * | 1993-04-05 | 1997-09-17 | 王明奎 | Method for producing high-titanium cold-bonded pellets |
| CN1085737C (en) * | 1999-08-10 | 2002-05-29 | 中南工业大学 | Process for preparing Ti-enriched material from ilmenite concentrate |
-
2004
- 2004-10-29 CN CNB2004100676699A patent/CN100366756C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665868B (en) * | 2009-07-30 | 2011-04-27 | 山西太钢不锈钢股份有限公司 | Method for utilizing stainless steel removed dust as ironmaking raw material |
| CN101613616B (en) * | 2009-07-31 | 2011-12-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Coke for furnace protection and preparation method thereof |
| CN102746913A (en) * | 2011-04-21 | 2012-10-24 | 宝山钢铁股份有限公司 | Moulding method of moulded coal used for smelting-reduction ironmaking |
| CN105907958A (en) * | 2016-05-10 | 2016-08-31 | 江苏省冶金设计院有限公司 | Composite binder and application of composite binder to water-bearing copper slag pelletizing |
| CN106086401A (en) * | 2016-06-23 | 2016-11-09 | 北京科技大学 | A kind of method inorganic polymer being applied in iron mineral powder agglomeration technique |
| CN110295282A (en) * | 2019-07-24 | 2019-10-01 | 深圳市中金岭南有色金属股份有限公司 | A kind of blast furnace returning charge briquetting technique |
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