CN101654737A - Compound iron ore pellet of molybdenum tailings and sulfate slags and preparation method thereof - Google Patents
Compound iron ore pellet of molybdenum tailings and sulfate slags and preparation method thereof Download PDFInfo
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- CN101654737A CN101654737A CN200810231439A CN200810231439A CN101654737A CN 101654737 A CN101654737 A CN 101654737A CN 200810231439 A CN200810231439 A CN 200810231439A CN 200810231439 A CN200810231439 A CN 200810231439A CN 101654737 A CN101654737 A CN 101654737A
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- sulfate slag
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Abstract
A compound iron ore pellet of molybdenum tailings and sulfate slags is prepared by blending, pelletizing and roasting the following raw materials in parts by weight: 30-60 parts of molybdenum tailings, 20-30 parts of sulfate slags, 20-40 parts of magnetite powder and 1-3 parts of binders. A preparation method is characterized by carrying out beneficiation after fine grinding of the coarse molybdenum tailings and sulfate slags, mixing ores with the magnetite powder, adding the binders, adding water and blending, roasting at 1000-1100 DEG C for 25-35min after palletizing and drying, and cooling,thus obtaining the finished product, wherein, the content of the ores with granularity not more than 0.074mm is not less than 85%. The compound pellet effectively utilizes the wastes from industrialproduction, improves the environment and provides the secondary iron-bearing raw materials for steel production in China.
Description
Technical field
The invention belongs to iron smelting pellets ore deposit technical field, be specifically related to a kind of secondary iron ore deposit comprehensive utilization of steel production industry blast furnace ironmaking raw material, improve molybdenum tailings, sulfate slag compound iron ore pellet of environmental protection and preparation method thereof.
Background technology
At present, China's gas washing in SA production has at least 2,200 ten thousand tons of iron-holder to produce at the sulfate slag more than 35%.Because it is to many-sided detrimentally affects such as the output of sintering and pellet formation and quality, its utilization ratio is less than 30%.For many years, the sulfate slag of accumulation has accounted for large quantities of farmlands and waters, the environment of having gone back severe contamination.In addition, the iron content tailings of annual production metal molybdenum about 3,000,000 tons, is not also well developed so far yet.
Pellet is one of main raw material of blast furnace ironmaking and direct reduction iron making.For blast furnace ironmaking, use pellet can improve the technico-economical comparison of blast furnace, to increase economic efficiency, the raw material of producing used for pellet at present mainly contains two kinds, and a kind of is magnetite powder, and its main chemical compositions is Fe
3O
4, a kind of is ground hematite, its main chemical compositions is Fe
2O
3
Summary of the invention
The objective of the invention is in order to make the iron content waste that produces in steel chemical and the mining processing industry production obtain effectively and widely utilizing, even the iron content secondary resource obtains comprehensive utilization, can allow contaminated environment improve again, turn waste into wealth, a kind of molybdenum tailings, sulfate slag compound iron ore pellet and preparation method thereof are provided.
The objective of the invention is to be achieved through the following technical solutions:
Molybdenum tailings of the present invention, sulfate slag compound iron ore pellet, it be by the smart powder of the molybdenum tailings of following weight parts, sulfate slag, iron and binding agent through mixing, make ball, roasting is prepared from:
Molybdenum tailings 30～60 weight parts
Sulfate slag 20～30 weight parts
Magnetite powder 20～40 weight parts
Binding agent 1～3 weight part.
Described binding agent is selected from any one in wilkinite, lime, cement, water glass, borate, coal tar, clay, water glass, the humic acid, is preferably sodium bentonite.
The preparation method of molybdenum tailings, sulfate slag compound iron ore pellet: at first molybdenum tailings and sulfate slag coarse fodder are carried out ore dressing after the fine grinding, the content of ore grain size≤0.074mm 〉=85%, mix with magnetite powder then, their blending ratio is molybdenum tailings 30～60 weight parts, sulfate slag 20～30 weight parts, magnetite powder 20～40 weight parts, add 1～3 parts by weight of adhesive, add the water mixing, through make ball, dry after at 1000～1100 ℃ of following roasting 25～35min.
The present invention is in order effectively to utilize the secondary iron ore deposit and to improve environmental protection, molybdenum tailings and sulfate slag that the coarse grain iron-holder is low are selected behind ball milling, their iron level is brought up to 62-65%, again with the magnetite powder mixed pelletizing, roasting, make qualified iron ore pellets, changed the influence of the smart powder mixing of single sulfate slag and iron to the iron ore pellets yield and quality, also changed simultaneously the disadvantageous effect that the adapted sulfate slag produces sintering quality in the SINTERING PRODUCTION, for blast furnace ironmaking production provides a kind of high-quality furnace charge (molybdenum improves steel plasticity-and wear resisting property etc.) that certain molybdenum content is arranged.This composite briquette ore has effectively utilized industrial waste, has improved environment, for steel production in China provides the secondary iron-bearing material.
Adopt the quality of the finished pellet that patent of the present invention makes to reach the specification of quality of country.Ultimate compression strength reaches average 2000N/, and 900 ℃ reduction degree reaches more than 65% more than the ball, and reduction swellability index (RSI) reaches＜20% level.
Embodiment
Below in conjunction with embodiment the present invention is elaborated, but and do not limit the present invention in any way.
Embodiment 1
(1) molybdenum tailings of the present invention, sulfate slag compound iron ore pellet, it be by the smart powder of the molybdenum tailings of following weight parts, sulfate slag, iron and binding agent through mixing, make ball, roasting is prepared from:
Molybdenum tailings 60 weight parts
Sulfate slag 20 weight parts
Magnetite powder 20 weight parts
Binding agent (sodium bentonite) 2.0 weight parts.
(2) preparation method of molybdenum tailings, sulfate slag compound iron ore pellet: at first molybdenum tailings and sulfate slag coarse fodder are carried out ore dressing after the fine grinding, the content of ore grain size≤0.074mm 〉=85%, mix with magnetite powder then, their blending ratio is molybdenum tailings 60 weight parts, sulfate slag 20 weight parts, magnetite powder 20 weight parts, their iron level is brought up to 62～65%, add 2 parts by weight of adhesive again, add the water mixing, causing diameter at the balling disk (-sc) of ∮ 3.8M is the pellet of 10mm-15mm, reinstalls 6m after the drying
2Shaft furnace at 1100 ℃ of following roasting 35min, enter behind the central cooler internal cooling finished product.
Finished product ultimate compression strength reaches average 2050N/ ball level, and 900 ℃ reduction degree reaches 66%, and reduction swellability index (RSI) reaches 18% level.
Embodiment 2
(1) molybdenum tailings of the present invention, sulfate slag compound iron ore pellet, it be by the smart powder of the molybdenum tailings of following weight parts, sulfate slag, iron and binding agent through mixing, make ball, roasting is prepared from:
Molybdenum tailings 30 weight parts
Sulfate slag 30 weight parts
Magnetite powder 40 weight parts
Binding agent (sodium bentonite) 1.8 weight parts.
(2) preparation method of molybdenum tailings, sulfate slag compound iron ore pellet: at first molybdenum tailings and sulfate slag coarse fodder are carried out ore dressing after the fine grinding, the content of ore grain size≤0.074mm 〉=85%, mix with magnetite powder then, their blending ratio is molybdenum tailings 30 weight parts, sulfate slag 30 weight parts, magnetite powder 40 weight parts, their iron level is brought up to 62～65%, add 1 parts by weight of adhesive again, add the water mixing, causing diameter at the balling disk (-sc) of ∮ 3.8M is the pellet of 10mm-15mm, reinstalls 6m after the drying
2Shaft furnace at 1080 ℃ of following roasting 25min, enter the finished product that obtains behind the central cooler internal cooling.
Finished product ultimate compression strength reaches average 2200N/ ball level, and 900 ℃ reduction degree reaches 68%, and reduction swellability index (RSI) reaches 16% level.
Embodiment 3
(1) molybdenum tailings of the present invention, sulfate slag compound iron ore pellet, it be by the smart powder of the molybdenum tailings of following weight parts, sulfate slag, iron and binding agent through mixing, make ball, roasting is prepared from:
Molybdenum tailings 40 weight parts
Sulfate slag 30 weight parts
Magnetite powder 30 weight parts
Binding agent (sodium bentonite) 2.5 weight parts.
(2) preparation method of molybdenum tailings, sulfate slag compound iron ore pellet: at first molybdenum tailings and sulfate slag coarse fodder are carried out ore dressing after the fine grinding, the content of ore grain size≤0.074mm 〉=85%, mix with magnetite powder then, their blending ratio is molybdenum tailings 40 weight parts, sulfate slag 30 weight parts, magnetite powder 30 weight parts, their iron level is brought up to 62～65%, add 4 parts by weight of adhesive again, add the water mixing, causing diameter at the balling disk (-sc) of ∮ 3.8M is the pellet of 10mm-15mm, reinstalls 6m after the drying
2Shaft furnace at 1090 ℃ of following roasting 28min, enter the central cooler internal cooling and obtain finished product.
Finished product ultimate compression strength reaches an average 2150N/ ball, and 900 ℃ reduction degree reaches 66%, and reduction swellability index (RSI) reaches 18.5%.
Embodiment 4
(1) molybdenum tailings of the present invention, sulfate slag compound iron ore pellet, it be by the smart powder of the molybdenum tailings of following weight parts, sulfate slag, iron and binding agent through mixing, make ball, roasting is prepared from:
Molybdenum tailings 50 weight parts
Sulfate slag 25 weight parts
Magnetite powder 25 weight parts
Binding agent (sodium bentonite) 2.2 weight parts.
(2) preparation method of molybdenum tailings, sulfate slag compound iron ore pellet: at first molybdenum tailings and sulfate slag coarse fodder are carried out ore dressing after the fine grinding, the content of ore grain size≤0.074mm 〉=85%, mix with magnetite powder then, their blending ratio is molybdenum tailings 50 weight parts, sulfate slag 25 weight parts, magnetite powder 25 weight parts, add 3 parts by weight of adhesive, add the water mixing, causing diameter at the balling disk (-sc) of ∮ 3.8M is the pellet of 10mm-15mm, reinstalls 6m after the drying
2Shaft furnace at 1095 ℃ of following roasting 32min, enter the central cooler internal cooling and get product.
Finished product ultimate compression strength reaches an average 2180N/ ball, and 900 ℃ reduction degree reaches 67%, and reduction swellability index (RSI) reaches 19%.
Embodiment 5
(1) molybdenum tailings of the present invention, sulfate slag compound iron ore pellet, it be by the smart powder of the molybdenum tailings of following weight parts, sulfate slag, iron and binding agent through mixing, make ball, roasting is prepared from:
Molybdenum tailings 45 weight parts
Sulfate slag 20 weight parts
Magnetite powder 35 weight parts
Binding agent (sodium bentonite) 1.6 weight parts.
(2) preparation method of molybdenum tailings, sulfate slag compound iron ore pellet: at first molybdenum tailings and sulfate slag coarse fodder are carried out ore dressing after the fine grinding, the content of ore grain size≤0.074mm 〉=85%, mix with magnetite powder then, their blending ratio is molybdenum tailings 45 weight parts, sulfate slag 20 weight parts, magnetite powder 35 weight parts, add 1.6 parts by weight of adhesive, add the water mixing, causing diameter at the balling disk (-sc) of ∮ 3.8M is the pellet of 10mm-15mm, reinstalls 6m after the drying
2Shaft furnace at 1090 ℃ of following roasting 30min, enter the central cooler internal cooling and get product.
Finished product ultimate compression strength reaches an average 2250N/ ball, and 900 ℃ reduction degree reaches 66%, and reduction swellability index (RSI) reaches 18.5%.
Claims (4)
1. a molybdenum tailings, sulfate slag compound iron ore pellet, it is characterized in that: it is by the molybdenum tailings of following weight parts, sulfate slag, magnetite powder and binding agent, through mixing, make ball, roasting is prepared from:
Molybdenum tailings 30～60 weight parts
Sulfate slag 20～30 weight parts
Magnetite powder 20～40 weight parts
Binding agent 1～3 weight part.
2. molybdenum tailings according to claim 1, sulfate slag compound iron ore pellet is characterized in that: described binding agent is selected from wilkinite.In lime, cement, water glass, borate, coal tar, clay, water glass, the humic acid any one.
3. molybdenum tailings according to claim 2, sulfate slag compound iron ore pellet is characterized in that: described binding agent is a sodium bentonite.
4. the preparation method of the described molybdenum tailings of claim 1, sulfate slag compound iron ore pellet, it is characterized in that: at first molybdenum tailings and sulfate slag coarse fodder are carried out ore dressing after the fine grinding, the content of ore grain size≤0.074mm 〉=85%, mix with magnetite powder then, their blending ratio is molybdenum tailings 30～60 weight parts, sulfate slag 20～30 weight parts, magnetite powder 20～40 weight parts, add 1～5 parts by weight of adhesive, add the water mixing, at 1000～1100 ℃ of following roasting 25～35min, cooling gets product after making ball, drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810231439XA CN101654737B (en) | 2008-12-19 | 2008-12-19 | Compound iron ore pellet of molybdenum tailings and sulfate slags and preparation method thereof |
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|---|---|---|---|
| CN200810231439XA CN101654737B (en) | 2008-12-19 | 2008-12-19 | Compound iron ore pellet of molybdenum tailings and sulfate slags and preparation method thereof |
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| CN101654737A true CN101654737A (en) | 2010-02-24 |
| CN101654737B CN101654737B (en) | 2011-07-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153098A (en) * | 2010-12-15 | 2011-08-17 | 何侠 | Method for preparing water glass and macroporous spherical silica gel from treatment waste residues of sulfuric acid cinder |
| CN103882223A (en) * | 2014-04-02 | 2014-06-25 | 山西太钢不锈钢股份有限公司 | Method for increasing bursting temperature of laterite nickel ore pellets |
| CN106544499A (en) * | 2015-09-17 | 2017-03-29 | 攀钢冶金材料有限责任公司 | A kind of composite assistant and its preparation method and application |
| CN106591567A (en) * | 2016-11-15 | 2017-04-26 | 江苏省冶金设计院有限公司 | Method for restraining and reducing reduction degradation of iron sand pellets and system special for method for restraining and reducing reduction degradation of iron sand pellets |
| CN106636623A (en) * | 2016-11-15 | 2017-05-10 | 江苏省冶金设计院有限公司 | Method for increasing reduction degree of ferrochromium pellet ore and special system for method |
| CN106702147A (en) * | 2016-11-15 | 2017-05-24 | 江苏省冶金设计院有限公司 | Method and system for reducing reduction degradation of vanadium-titanium magnet pellets |
| CN106755978A (en) * | 2016-11-15 | 2017-05-31 | 江苏省冶金设计院有限公司 | A kind of method and system of control laterite nickel ore pellets reduction swellability |
| CN113862470A (en) * | 2021-09-28 | 2021-12-31 | 兰溪市博远金属有限公司 | Binder for fine-grained aluminum ash dry-type pelletizing and fine-grained aluminum ash pelletizing method |
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2008
- 2008-12-19 CN CN200810231439XA patent/CN101654737B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153098A (en) * | 2010-12-15 | 2011-08-17 | 何侠 | Method for preparing water glass and macroporous spherical silica gel from treatment waste residues of sulfuric acid cinder |
| CN103882223A (en) * | 2014-04-02 | 2014-06-25 | 山西太钢不锈钢股份有限公司 | Method for increasing bursting temperature of laterite nickel ore pellets |
| CN103882223B (en) * | 2014-04-02 | 2016-03-30 | 山西太钢不锈钢股份有限公司 | A kind of method improving red soil nickel ore bursting temperature of pellet ores |
| CN106544499A (en) * | 2015-09-17 | 2017-03-29 | 攀钢冶金材料有限责任公司 | A kind of composite assistant and its preparation method and application |
| CN106544499B (en) * | 2015-09-17 | 2018-07-24 | 攀钢冶金材料有限责任公司 | A kind of composite assistant and its preparation method and application |
| CN106591567A (en) * | 2016-11-15 | 2017-04-26 | 江苏省冶金设计院有限公司 | Method for restraining and reducing reduction degradation of iron sand pellets and system special for method for restraining and reducing reduction degradation of iron sand pellets |
| CN106636623A (en) * | 2016-11-15 | 2017-05-10 | 江苏省冶金设计院有限公司 | Method for increasing reduction degree of ferrochromium pellet ore and special system for method |
| CN106702147A (en) * | 2016-11-15 | 2017-05-24 | 江苏省冶金设计院有限公司 | Method and system for reducing reduction degradation of vanadium-titanium magnet pellets |
| CN106755978A (en) * | 2016-11-15 | 2017-05-31 | 江苏省冶金设计院有限公司 | A kind of method and system of control laterite nickel ore pellets reduction swellability |
| CN113862470A (en) * | 2021-09-28 | 2021-12-31 | 兰溪市博远金属有限公司 | Binder for fine-grained aluminum ash dry-type pelletizing and fine-grained aluminum ash pelletizing method |
| CN113862470B (en) * | 2021-09-28 | 2023-06-09 | 兰溪市博远金属有限公司 | Adhesive for dry pelletizing of fine-fraction aluminum ash and pelletizing method of fine-fraction aluminum ash |
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| CN101654737B (en) | 2011-07-27 |
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