CN102021319A - Novel binder for metallurgical pellet and preparation method thereof - Google Patents
Novel binder for metallurgical pellet and preparation method thereof Download PDFInfo
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- CN102021319A CN102021319A CN2009101874384A CN200910187438A CN102021319A CN 102021319 A CN102021319 A CN 102021319A CN 2009101874384 A CN2009101874384 A CN 2009101874384A CN 200910187438 A CN200910187438 A CN 200910187438A CN 102021319 A CN102021319 A CN 102021319A
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- parts
- pellets
- natural calcium
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- metallurgical
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- 239000008188 pellet Substances 0.000 title claims abstract description 53
- 239000011230 binding agent Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 36
- 239000011734 sodium Substances 0.000 claims abstract description 23
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 23
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 22
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 18
- 239000001913 cellulose Substances 0.000 claims abstract description 17
- 229920002678 cellulose Polymers 0.000 claims abstract description 17
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 9
- 239000000440 bentonite Substances 0.000 claims abstract description 9
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011575 calcium Substances 0.000 claims abstract description 6
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910000281 calcium bentonite Inorganic materials 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract 2
- 238000003913 materials processing Methods 0.000 abstract 1
- 238000007781 pre-processing Methods 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 229940092782 bentonite Drugs 0.000 description 5
- 230000009172 bursting Effects 0.000 description 4
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 description 2
- 229910000280 sodium bentonite Inorganic materials 0.000 description 2
- 229940080314 sodium bentonite Drugs 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention belongs to metallurgical materials and preprocessing technology, and particularly relates to a novel binder for metallurgical pellets and preparation method thereof. The novel binder for metallurgical pellets comprises the following components by weight: 100 parts of natural calcium base bentonite, 2-5 parts of sodium carbonate, 1.1-2.0 parts of sodium cellulose. The natural calcium base bentonite has a montmorillonite content of above 54%. The preparation method comprises the following steps: adding 2-5 parts by weight of sodium carbonate into 100 parts by weight of natural calcium base bentonite to perform sodification; drying to obtain a water content of less than 12%; grinding to allow the content of particles with a particle size below 43 microns to be more than 90%; adding 1.1-2.0 parts by weight of sodium cellulose; stirring and uniformly mixing to obtain a novel binder product for metallurgical pellets. The binder of the invention effectively improves the pelletability of green pellets, increases the shock temperature of green pellets, and plays a role of production increase and consumption reduction in the production of pellets.
Description
Technical Field
The invention belongs to metallurgical raw materials and a pretreatment technology, and particularly relates to a novel binder for metallurgical pellets and a preparation method thereof.
Background
For many years, several kinds of bentonite have been used as a pellet binder in the ore industry pellet mill, and the soil species of the bentonite is mainly natural calcium bentonite, and the unit consumption of the bentonite is more than 35 kg/ton of pellet, and the unit consumption is relatively high. Sodium bentonite alone has also been tested for a reduction in unit consumption but fails due to the bursting problem. In order to select a pellet binder with better service performance, reduce the addition amount of the binder in the pellet production process, ensure the total iron grade of finished pellets and improve the metallurgical performance of the pellets, research and development of the binder used for producing novel metallurgical pellets are very needed.
Disclosure of Invention
The invention aims to provide a novel binder for metallurgical pellets, which reduces the dosage of the binder added in the pellet sintering process and improves the iron grade of pellet products.
The invention also aims to provide a preparation method of the novel binder for the metallurgical pellets.
The purpose of the invention is realized by the following technical scheme:
the novel binder for the metallurgical pellets is characterized by comprising the following components in percentage by weight:
100 portions of natural calcium bentonite
2-5 parts of sodium carbonate
1.1-2.0 parts of sodium cellulose.
The natural calcium bentonite is natural calcium bentonite with montmorillonite content more than 54%.
The addition amount of sodium carbonate and sodium cellulose can be selected according to the montmorillonite content of the natural calcium bentonite. For example, the weight ratio of the components is as follows:
100 portions of natural calcium bentonite
2-3 parts of sodium carbonate
1.1-1.3 parts of sodium cellulose.
Or,
the weight ratio of the components is as follows:
100 portions of natural calcium bentonite
3-4 parts of sodium carbonate
And 1.4-1.6 parts of sodium cellulose.
Or,
the weight ratio of the components is as follows:
100 portions of natural calcium bentonite
4-5 parts of sodium carbonate
And 1.7-2.0 parts of sodium cellulose.
The preparation method for preparing the novel binder for the metallurgical pellets is characterized by comprising the following steps:
1) the natural calcium-based bentonite is crushed,
2) adding 2-5 parts by weight of sodium carbonate into 100 parts by weight of crushed natural calcium bentonite,
3) the two materials are evenly mixed, and then the mixture is stirred,
4) the mixture is extruded into blocks and the blocks are formed,
5) piling the extruded lump materials for 15-20 days to complete sodium treatment,
6) naturally airing the block subjected to sodium modification for 5-15 days,
7) drying the naturally aired block by hot air to ensure that the water content is less than 12 percent by weight,
8) adding 1.1-2.0 parts by weight of sodium cellulose, stirring and mixing uniformly,
9) grinding until the grain size is less than 43 microns and accounts for more than 90 percent to prepare a novel binder product for metallurgical pellets,
10) grading and bagging the product.
The novel binder for metallurgical pellets replaces calcium bentonite or sodium bentonite in the production process of pellets, can effectively improve the pelletizing property of green pellets, improve the bursting temperature of the green pellets, improve the metallurgical performance of the pellets, and has the effects of increasing production and reducing consumption for the production of the pellets.
The novel binder for the metallurgical pellets has the advantages that:
1. the addition of the binder in the pellet production is reduced, and the iron grade of the pellets is improved. The addition amount of the binder is reduced from 35 kg/ton balls per unit consumption to 16 kg/ton balls, the iron grade of the pellets is improved by one percentage, and the economic benefit is obvious.
2. The binder can effectively improve the balling performance of green pellets, increase the bursting temperature of the green pellets from 400 ℃ to 450 ℃, shorten the drying time and improve the productivity.
3. Experimental results show that the pellet produced by the binder has stable metallurgical performance. The method provides reference significance for domestic ore dressing of the same kind and has obvious social benefit.
Detailed Description
The following examples are provided to illustrate specific embodiments of the present invention.
The novel binder for the metallurgical pellets is characterized by comprising the following components in percentage by weight:
100 portions of natural calcium bentonite
2-5 parts of sodium carbonate
1.1-2.0 parts of sodium cellulose.
The natural calcium bentonite is natural calcium bentonite with montmorillonite content more than 54%.
Example 1
The weight ratio of the components is as follows:
100 portions of natural calcium bentonite
2-3 parts of sodium carbonate
1.1-1.3 parts of sodium cellulose.
Example 2
The weight ratio of the components is as follows:
100 portions of natural calcium bentonite
3-4 parts of sodium carbonate
And 1.4-1.6 parts of sodium cellulose.
Example 3
The weight ratio of the components is as follows:
100 portions of natural calcium bentonite
4-5 parts of sodium carbonate
And 1.7-2.0 parts of sodium cellulose.
The preparation method for preparing the novel binder for the metallurgical pellets is characterized by comprising the following steps:
1) the natural calcium-based bentonite is crushed,
2) adding 2-5 parts by weight of sodium carbonate into 100 parts by weight of crushed natural calcium bentonite,
3) the two materials are evenly mixed, and then the mixture is stirred,
4) the mixture is extruded into blocks and the blocks are formed,
5) piling the extruded lump materials for 15-20 days to complete sodium treatment,
6) naturally airing the block subjected to sodium modification for 5-15 days,
7) drying the naturally aired block by hot air to ensure that the water content is less than 12 percent by weight,
8) adding 1.1-2.0 parts by weight of polyacrylamide, stirring and mixing uniformly,
9) grinding until the grain size is less than 43 microns and accounts for more than 90 percent to prepare a novel binder product for metallurgical pellets,
10) grading and bagging the product.
The invention has the beneficial effects that:
1. the addition of the binder in the pellet production is reduced, and the iron grade of the pellets is improved. The addition amount of the binder is reduced from 35 kg/ton balls per unit consumption to 16 kg/ton balls, the iron grade of the pellets is improved by one percentage, and the economic benefit is obvious.
2. The binder can effectively improve the balling performance of green pellets, increase the bursting temperature of the green pellets from 400 ℃ to 450 ℃, shorten the drying time and improve the productivity.
3. Experimental results show that the pellet produced by the binder has stable metallurgical performance. The method provides reference significance for domestic ore dressing of the same kind and has obvious social benefit.
Claims (6)
1. The novel binder for the metallurgical pellets is characterized by comprising the following components in percentage by weight:
100 portions of natural calcium bentonite
2-5 parts of sodium carbonate
1.1-2.0 parts of sodium cellulose.
2. The novel binder for metallurgical pellets as claimed in claim 1, wherein the natural calcium bentonite is a natural calcium bentonite having a montmorillonite content of more than 54%.
3. The novel binder for metallurgical pellets as claimed in claim 1, wherein the weight ratio of the components is:
100 portions of natural calcium bentonite
2-3 parts of sodium carbonate
1.1-1.3 parts of sodium cellulose.
4. The novel binder for metallurgical pellets as claimed in claim 1, wherein the weight ratio of the components is:
100 portions of natural calcium bentonite
3-4 parts of sodium carbonate
And 1.4-1.6 parts of sodium cellulose.
5. The novel binder for metallurgical pellets as claimed in claim 1, wherein the weight ratio of the components is:
100 portions of natural calcium bentonite
4-5 parts of sodium carbonate
And 1.7-2.0 parts of sodium cellulose.
6. A method for preparing a novel binder for metallurgical pellets according to claim 1, characterized by comprising the following steps:
1) the natural calcium-based bentonite is crushed,
2) adding 2-5 parts by weight of sodium carbonate into 100 parts by weight of crushed natural calcium bentonite,
3) the two materials are evenly mixed, and then the mixture is stirred,
4) the mixture is extruded into blocks and the blocks are formed,
5) piling the extruded blocks for 15-20 daysSodium modification is completed，
6) Naturally airing the block subjected to sodium modification for 5-15 days,
7) drying the naturally aired block by hot air to ensure that the water content is less than 12 percent by weight,
8) adding 1.1-2.0 parts by weight of sodium cellulose, stirring and mixing uniformly,
9) grinding until the grain size is less than 43 microns and accounts for more than 90 percent to prepare a novel binder product for metallurgical pellets,
10) grading and bagging the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101874384A CN102021319A (en) | 2009-09-18 | 2009-09-18 | Novel binder for metallurgical pellet and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101874384A CN102021319A (en) | 2009-09-18 | 2009-09-18 | Novel binder for metallurgical pellet and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102021319A true CN102021319A (en) | 2011-04-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101874384A Pending CN102021319A (en) | 2009-09-18 | 2009-09-18 | Novel binder for metallurgical pellet and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102021319A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805279A (en) * | 2015-05-27 | 2015-07-29 | 李建文 | Magnesium-containing compounded additive and preparation method thereof |
| CN108103309A (en) * | 2017-12-19 | 2018-06-01 | 东北大学 | A kind of converter dust-removing ash coal-pressing ball adhesive special |
| CN109852789A (en) * | 2019-04-25 | 2019-06-07 | 王勇 | A kind of metallurgical briquetting compound binding agent and its production technology |
| CN109929995A (en) * | 2019-03-29 | 2019-06-25 | 信阳市上天梯怡和矿产资源开发有限公司 | A kind of aluminium ash pellet binder and preparation method thereof |
-
2009
- 2009-09-18 CN CN2009101874384A patent/CN102021319A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805279A (en) * | 2015-05-27 | 2015-07-29 | 李建文 | Magnesium-containing compounded additive and preparation method thereof |
| CN108103309A (en) * | 2017-12-19 | 2018-06-01 | 东北大学 | A kind of converter dust-removing ash coal-pressing ball adhesive special |
| CN109929995A (en) * | 2019-03-29 | 2019-06-25 | 信阳市上天梯怡和矿产资源开发有限公司 | A kind of aluminium ash pellet binder and preparation method thereof |
| CN109929995B (en) * | 2019-03-29 | 2020-08-07 | 信阳市上天梯怡和矿产资源开发有限公司 | Aluminum ash pellet binder and preparation method thereof |
| CN109852789A (en) * | 2019-04-25 | 2019-06-07 | 王勇 | A kind of metallurgical briquetting compound binding agent and its production technology |
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Application publication date: 20110420 |