CN102021321A - Novel binder for metallurgical pellets - Google Patents
Novel binder for metallurgical pellets Download PDFInfo
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- CN102021321A CN102021321A CN2009101874401A CN200910187440A CN102021321A CN 102021321 A CN102021321 A CN 102021321A CN 2009101874401 A CN2009101874401 A CN 2009101874401A CN 200910187440 A CN200910187440 A CN 200910187440A CN 102021321 A CN102021321 A CN 102021321A
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- natural calcium
- metallurgical
- polyacrylamide
- binder
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Abstract
The invention belongs to the metallurgical raw materials and pretreatment technology and in particular relates to a novel binder for metallurgical pellets. The binder comprises the following components by weight: 100 parts of natural calcium bentonite, 2-5 parts of sodium carbonate and 0.8-1.5 parts of polyacrylamide, wherein The content of montmorillonite in the natural calcium bentonite is more than 54%. A preparation method comprises the following steps: 1) adding 2-5 parts of sodium carbonate to 100 parts of natural calcium bentonite; 2) after sodium treatment, carrying out drying until the moisture is lower than 12% and carrying out ore grinding until the powder with size below 43mu m accounts for more than 90%; and 3) adding 0.8-1.5 parts of polyacrylamide and stirring and mixing the mixture uniformly to prepare the novel binder product for metallurgical pellets. The binder can effectively improve the pelletizing performance of the green pellets, improve the cracking temperature of the green pellets, improve the metallurgical performance of the pellet ore and increase yield and reduce consumption in pellet ore production.
Description
Technical field
The invention belongs to metallurgical raw material and preconditioning technique field, particularly relate to a kind of novel metallurgical pelletizing binding agent and preparation method thereof.
Background technology
For many years, mining industry pelletizing plant once used the man wilkinite of number as pellet binder, and bentonitic soil species mainly is the natural calcium base bentonite, and its unit consumption is more than 35kg/ ton ball, and this unit consumption is than higher.Also once tested and used separately sodium bentonite, though unit consumption decrease, owing to the explosion problem is failed.Be to select the more excellent pellet binder of use properties, reduce binding agent in the pellet formation process with addition of amount, guarantee the full iron grade of finished ball nodulizing, improve the pellet metallurgical performance, be starved of the binding agent that a kind of novel metallurgical pellet formation of research and development is used.
Summary of the invention
The objective of the invention is for developing a kind of novel metallurgical pelletizing binding agent, purpose is to reduce in the pellet sintering process with addition of the binding agent consumption, improves pellet product iron grade.
The objective of the invention is to realize by following technical proposals:
According to a kind of novel metallurgical pelletizing binding agent of the present invention, it is characterized in that being formed by the component of following weight ratio:
100 parts of natural calcium base bentonites
Yellow soda ash 2-5 part
Polyacrylamide 0.8-1.5 part.
The structural formula of polyacrylamide is [CH2-CH (CONH2)] n.
Described natural calcium base bentonite is a smectite content greater than 60% natural calcium base bentonite.
In the pellet production process, substitute calcium-base bentonite or sodium bentonite with binding agent with novel metallurgical pelletizing of the present invention, can effectively improve the balling-up of green-ball, improve the burst temperature of green-ball, improve the metallurgical performance of pellet, production has the effect of volume increase consumption reduction to pellet.
The addition of yellow soda ash and polyacrylamide can be according to the smectite content of natural calcium base bentonite
Come selected.For example, the weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 2-3 part
Polyacrylamide 0.8-1.0 part.
Perhaps, the weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 3-4 part
Polyacrylamide 1.0-1.2 part.
Perhaps, the weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 4-5 part
Polyacrylamide 1.3-1.5 part.
Being used to prepare the novel metallurgical pelletizing comprises the steps: with the method for binding agent
1) the natural calcium base bentonite is pulverized,
2) add the yellow soda ash of 2-5 part weight ratio in the natural calcium base bentonite through pulverizing of 100 parts of weight ratios,
3) two kinds of material are mixed,
4) compound is squeezed into piece,
The piece stockpile that 5) will be squeezed into is put and was finished sodium in 15-20 days,
6) the piece material that will finish sodium carries out natural airing 6-15 husband,
7) the piece material that will finish natural airing carries out warm air drying, makes moisture reach weight percent below 12%,
8) with addition of the polyacrylamide of 0.8-1.5 part weight ratio, stirring and evenly mixing,
9) be milled to below 43 microns through ore grinding and account for more than 90%, make novel metallurgical pelletizing binder product,
10) product is carried out classification, pack.
Novel metallurgical pelletizing of the present invention has with the advantage of binding agent:
1, reduces the pellet formation content of binder, improve pellet iron grade.Content of binder is reduced to 16kg/ ton ball by unit consumption 35kg/ ton ball, and pelletizing iron grade improves one percentage point, economic benefit
2, this binding agent can effectively improve the green-ball balling property, improves the burst temperature of green-ball, and the burst temperature of green-ball is brought up to 450 ℃ by 400 ℃, shortens time of drying, improves production capacity.
3, experimental result shows, the pellet metallurgical performance that this binding agent is produced is stable.To the domestic similar ore beneficiation meaning of offering reference, obvious social benefit.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with embodiment.
According to a kind of novel metallurgical pelletizing binding agent of the present invention, it is characterized in that being formed by the component of following weight ratio:
100 parts of natural calcium base bentonites
Yellow soda ash 2-5 part
Polyacrylamide 0.8-1.5 part.
Described natural calcium base bentonite is a smectite content greater than 54% natural calcium base bentonite.
Embodiment 1
The weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 2-3 part
Polyacrylamide 0.8-1.0 part.
Embodiment 2
The weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 3-4 part
Polyacrylamide 1.0-1.2 part.
Embodiment 3
The weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 4-5 part
Polyacrylamide 1.3-1.5 part.
Claims (5)
1. novel metallurgical pelletizing binding agent is characterized in that being made up of the component of following weight ratio:
100 parts of natural calcium base bentonites
Yellow soda ash 2-5 part
Polyacrylamide 0.8-1.5 part.
2. a kind of novel metallurgical pelletizing binding agent according to claim 1 is characterized in that described natural calcium base bentonite is a smectite content greater than 60% natural calcium base bentonite.
3. a kind of novel metallurgical pelletizing binding agent according to claim 1 is characterized in that the weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 2-3 part
Polyacrylamide 0.8-1.0 part.
4. a kind of novel metallurgical pelletizing binding agent according to claim 1 is characterized in that the weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 3-4 part
Polyacrylamide 1.0-1.2 part.
5. a kind of novel metallurgical pelletizing binding agent according to claim 1 is characterized in that the weight ratio of described component is:
100 parts of natural calcium base bentonites
Yellow soda ash 4-5 part
Polyacrylamide 1.3-1.5 part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101874401A CN102021321A (en) | 2009-09-18 | 2009-09-18 | Novel binder for metallurgical pellets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101874401A CN102021321A (en) | 2009-09-18 | 2009-09-18 | Novel binder for metallurgical pellets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102021321A true CN102021321A (en) | 2011-04-20 |
Family
ID=43863096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101874401A Pending CN102021321A (en) | 2009-09-18 | 2009-09-18 | Novel binder for metallurgical pellets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102021321A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194595A (en) * | 2013-04-06 | 2013-07-10 | 江西理工大学 | Composite type fluorite pelletizing adhesive |
| CN105219956A (en) * | 2015-10-30 | 2016-01-06 | 兰州大学 | A kind of preparation method of iron powder coal-pressing ball compound binding agent |
-
2009
- 2009-09-18 CN CN2009101874401A patent/CN102021321A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194595A (en) * | 2013-04-06 | 2013-07-10 | 江西理工大学 | Composite type fluorite pelletizing adhesive |
| CN105219956A (en) * | 2015-10-30 | 2016-01-06 | 兰州大学 | A kind of preparation method of iron powder coal-pressing ball compound binding agent |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110420 |