CN104152681A - Pellet composite bentonite and manufacturing method thereof - Google Patents
Pellet composite bentonite and manufacturing method thereof Download PDFInfo
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- CN104152681A CN104152681A CN201410410508.9A CN201410410508A CN104152681A CN 104152681 A CN104152681 A CN 104152681A CN 201410410508 A CN201410410508 A CN 201410410508A CN 104152681 A CN104152681 A CN 104152681A
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Abstract
Disclosed are pellet composite bentonite and a manufacturing method of the pellet composite bentonite. The pellet composite bentonite comprises, by weight, 70 percent to 81 percent of montmorillonite, five percent to eight percent of sodium carboxymethylcellulose, three percent to five percent of cellulose acetate membranes, one percent to three percent of barium stearate and nine percent to 14 percent of calcined lime. Main chemical components of the bentonite comprise, by weight, 55 percent to 65 percent of SiO2, 10 percent to 45 percent of CaO, and water smaller than 15 percent. Raw materials are respectively fine ground to minus 320 meshes through a Raymond mill, more than 95 percent of the raw materials can pass through the minus 320 meshes, matched materials measured according to the ratio are strongly and evenly mixed, then are conveyed to a material matching bunker and participate in pellet matching, and the matching adding amount is 1.0 percent to 1.2 percent of the total pellet weight. According to the method, the iron ore concentrate balling rate can be improved, the green-ball intensity index is improved, meanwhile, the grade of finished pellet can be correspondingly improved by 0.8 percent point, and therefore the yield of a blast furnace is improved by three percent, the coke ratio is reduced by two percent, the tonnage iron cost is reduced by 2.5 yuan to 3.0 yuan, and the aims of increasing production and reducing the coke ratio are achieved.
Description
Technical field
The invention belongs to raw material field, iron smelting pellets ore deposit, composite bentonite and method for formulating thereof that particularly a kind of iron smelting pellets pelletizing is used.
Background technology
At present, domestic iron and steel enterprises all needs to add a certain amount of binding agent and improves pellet strength in pellet formation process, and to meet pelletizing demand, most of factory adds sodium bentonite, also has part producer to add organic binder bond and liquid-containing binder.
But, in production practice process, find, no matter be to add sodium bentonite, still add organic binder bond or liquid-containing binder, all there is certain limitation and defect.Because sodium bentonite addition is larger, cause finished ball nodulizing grade to reduce, the comprehensive grade of blast furnace feeding raw material is declined, larger on furnace processor and coke ratio impact.Organic binder bond price is higher, if large with addition of amount, certainly will cause pellet cost to raise; If little with addition of amount, measure difficulty large, and be difficult for mixing, do not reach the effect of anticipation.Although liquid-containing binder addition means is simple, after pelletizing uses, cracking temperature of green pellet reduces, and will have a strong impact on the quality of pellet.
Summary of the invention
The present invention aims to provide one can improve iron ore concentrate balling ratio, when improving green ball strength index, improves finished ball nodulizing grade, reduces raw material and smelting cost, realizes volume increase and falls burnt pelletizing composite bentonite and method for formulating thereof.
For this reason, the solution that the present invention takes is:
A kind of pelletizing composite bentonite, is characterized in that, its component wt% is:
Montmorillonite 70～81%, Xylo-Mucine 5～8%, cellulose acetate membrane 3～5%, barium stearate 1～3%, unslaked lime 9～14%.
Described composite bentonite main chemical compositions wt% is:
SiO
255～65%, CaO 10～45%, moisture < 15%.
A method for formulating for composite bentonite for pelletizing, is characterized in that:
Raw material montmorillonite, Xylo-Mucine, cellulose acetate membrane, barium stearate and unslaked lime are finely ground to-320 meshes by Raymond mill respectively more than 95% to be passed through, then the each raw material powder after sieving is measured by proportioning by belt scale, batching after metering is mixed into composite bentonite through intensive mixer, composite bentonite is transported to pelletizing plant's compounding plant by suction tank car, be transported to batching ore deposit groove by pneumatic conveyer, participation pelletizing batching, composite bentonite be pelletizing gross weight with addition of amount 1.0～1.2%.
Beneficial effect of the present invention is:
The present invention can improve iron ore concentrate balling ratio, and when improving green ball strength index, corresponding raising finished ball nodulizing grade, reduces raw material and smelting cost, realizes volume increase and falls burnt object.Production practice prove, pellet formation replaces sodium bentonites with addition of 1.0～1.2% composite bentonites, can make finished ball nodulizing grade improve 0.8 percentage point, thereby make blast furnace feeding grade raise 1%, output improves 3%, and coke ratio reduces by 2%, and iron cost per ton can reduce by 2.5～3.0 yuan.
Embodiment
Embodiment raw materials quality should ensure that the composite bentonite main chemical compositions wt% after preparation meets: SiO
255～65%, CaO 10～45%, moisture < 15%.
Embodiment 1:
Pelletizing with composite bentonite component wt% is: montmorillonite 70%, Xylo-Mucine 8%, cellulose acetate membrane 5%, barium stearate 3%, unslaked lime 14%.
By raw material montmorillonite, Xylo-Mucine, cellulose acetate membrane, barium stearate and unslaked lime are finely ground to-320 meshes by Raymond mill respectively more than 95% to be passed through, then by the each raw material powder after sieving by belt scale by montmorillonite 70%, Xylo-Mucine 8%, cellulose acetate membrane 5%, barium stearate 3%, the proportioning metering of unslaked lime 14%, batching after metering is mixed into composite bentonite through intensive mixer, composite bentonite is transported to pelletizing plant's compounding plant by suction tank car, be transported to batching ore deposit groove by pneumatic conveyer, participation pelletizing batching, composite bentonite with addition of amount for pelletizing gross weight 1.2%.
Embodiment 2:
Pelletizing with composite bentonite component wt% is: montmorillonite 80%, Xylo-Mucine 5%, cellulose acetate membrane 3%, barium stearate 2%, unslaked lime 10%.
By raw material montmorillonite, Xylo-Mucine, cellulose acetate membrane, barium stearate and unslaked lime are finely ground to-320 meshes by Raymond mill respectively more than 95% to be passed through, then by the each raw material powder after sieving by belt scale by montmorillonite 80%, Xylo-Mucine 5%, cellulose acetate membrane 3%, barium stearate 2%, the proportioning metering of unslaked lime 10%, batching after metering is mixed into composite bentonite through intensive mixer, composite bentonite is transported to pelletizing plant's compounding plant by suction tank car, be transported to batching ore deposit groove by pneumatic conveyer, participation pelletizing batching, composite bentonite with addition of amount for pelletizing gross weight 1.0%.
Embodiment 3:
Pelletizing with composite bentonite component wt% is: montmorillonite 75%, Xylo-Mucine 7%, cellulose acetate membrane 4%, barium stearate 2%, unslaked lime 12%.
By raw material montmorillonite, Xylo-Mucine, cellulose acetate membrane, barium stearate and unslaked lime are finely ground to-320 meshes by Raymond mill respectively more than 95% to be passed through, then by the each raw material powder after sieving by belt scale by montmorillonite 75%, Xylo-Mucine 7%, cellulose acetate membrane 4%, barium stearate 2%, the proportioning metering of unslaked lime 12%, batching after metering is mixed into composite bentonite through intensive mixer, composite bentonite is transported to pelletizing plant's compounding plant by suction tank car, be transported to batching ore deposit groove by pneumatic conveyer, participation pelletizing batching, composite bentonite with addition of amount for pelletizing gross weight 1.1%.
Claims (3)
1. a pelletizing composite bentonite, is characterized in that, its component wt% is:
Montmorillonite 70～81%, Xylo-Mucine 5～8%, cellulose acetate membrane 3～5%, barium stearate 1～3%, unslaked lime 9～14%.
2. pelletizing composite bentonite according to claim 1, is characterized in that, described composite bentonite main chemical compositions wt% is:
SiO
255～65%, CaO 10～45%, moisture < 15%.
3. the method for formulating of composite bentonite for pelletizing as claimed in claim 1, is characterized in that:
Raw material montmorillonite, Xylo-Mucine, cellulose acetate membrane, barium stearate and unslaked lime are finely ground to-320 meshes by Raymond mill respectively more than 95% to be passed through, then the each raw material powder after sieving is measured by proportioning by belt scale, batching after metering is mixed into composite bentonite through intensive mixer, composite bentonite is transported to pelletizing plant's compounding plant by suction tank car, be transported to batching ore deposit groove by pneumatic conveyer, participation pelletizing batching, composite bentonite be pelletizing gross weight with addition of amount 1.0～1.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410508.9A CN104152681B (en) | 2014-08-18 | 2014-08-18 | A kind of pelletizing composite bentonite and method for formulating thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410508.9A CN104152681B (en) | 2014-08-18 | 2014-08-18 | A kind of pelletizing composite bentonite and method for formulating thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN104152681A true CN104152681A (en) | 2014-11-19 |
| CN104152681B CN104152681B (en) | 2016-03-30 |
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| CN201410410508.9A Expired - Fee Related CN104152681B (en) | 2014-08-18 | 2014-08-18 | A kind of pelletizing composite bentonite and method for formulating thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070153A (en) * | 2010-11-26 | 2011-05-25 | 攀枝花学院 | Bentonite binder and preparation method thereof |
| CN102719664A (en) * | 2011-03-30 | 2012-10-10 | 鞍钢股份有限公司 | Pellet binder and adding device and adding method thereof |
| CN102719662A (en) * | 2011-03-30 | 2012-10-10 | 鞍钢股份有限公司 | Magnesium binder for pellets and preparation method and addition method thereof |
| CN103898316A (en) * | 2014-04-14 | 2014-07-02 | 王志 | Magnesium composite bentonite for pelletizing |
| CN103922356A (en) * | 2014-03-26 | 2014-07-16 | 芜湖恒杰膨润土科技有限公司 | Preparation technology of composite bentonite |
-
2014
- 2014-08-18 CN CN201410410508.9A patent/CN104152681B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070153A (en) * | 2010-11-26 | 2011-05-25 | 攀枝花学院 | Bentonite binder and preparation method thereof |
| CN102719664A (en) * | 2011-03-30 | 2012-10-10 | 鞍钢股份有限公司 | Pellet binder and adding device and adding method thereof |
| CN102719662A (en) * | 2011-03-30 | 2012-10-10 | 鞍钢股份有限公司 | Magnesium binder for pellets and preparation method and addition method thereof |
| CN103922356A (en) * | 2014-03-26 | 2014-07-16 | 芜湖恒杰膨润土科技有限公司 | Preparation technology of composite bentonite |
| CN103898316A (en) * | 2014-04-14 | 2014-07-02 | 王志 | Magnesium composite bentonite for pelletizing |
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| Publication number | Publication date |
|---|---|
| CN104152681B (en) | 2016-03-30 |
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Granted publication date: 20160330 Termination date: 20160818 |