CN108004395A - A kind of compound binding agent for producing acid pellet - Google Patents
A kind of compound binding agent for producing acid pellet Download PDFInfo
- Publication number
- CN108004395A CN108004395A CN201711376105.7A CN201711376105A CN108004395A CN 108004395 A CN108004395 A CN 108004395A CN 201711376105 A CN201711376105 A CN 201711376105A CN 108004395 A CN108004395 A CN 108004395A
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- China
- Prior art keywords
- binding agent
- compound binding
- parts
- borate
- lime
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Glanulating (AREA)
Abstract
The present invention relates to a kind of compound binding agent for producing acid pellet, it is made of following parts by weight of component：25~60 parts of 0.003~2 part of lime, 3~8 parts of polyvinyl alcohol, 0.01~0.5 part of borate and water.The compound binding agent of the present invention can significantly improve the drop strength and compression strength of green-ball, and be obviously improved pelletizing burst temperature, when the compression strength of agglomerates greatly improves.
Description
Technical field
The invention belongs to technical field of smelting, and in particular to a kind of compound binding agent for producing acid pellet.
Background technology
High-grade iron ore, the reserves of high-quality coking coal gradually become rare with the development of steel and iron industry, obtain high-quality
The cost of resource steps up.Moreover, it is achieved that high-quality, high yield, low consumption, environmental protection are the only way which must be passed of current steel industry.And
In world wide, the large storage capacity of lean ore, exploration prospect is wide, but lean ore needs the early period by mining, ore grinding and ore dressing etc.
Processing can just obtain the of a relatively high iron ore concentrate of grade, but this grade it is higher iron ore concentrate particle diameter it is smaller, it is impossible to enter stove
Directly smelted, entering stokehold needs to carry out pelletizing to obtain the suitable pelletizing of size and could smelt.
Be unable to do without when producing pelletizing and add appropriate binding agent, under conditions of binding agent is lacked pelletizing will be unable to balling-up or
Person's pellet characteristics are unstable, and commonplace binding agent be bentonite at present, but the excessive bentonite of addition can reduce pelletizing
Grade, and some enterprises attempt directly to add organic binder bond, but effect is not so good, main cause be organic binder bond price compared with
Height, the easy combustion decomposition of high temperature, the compression strength of reduction high-temperature roasting pelletizing.
The content of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of compound binding agent for producing acid pellet.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include：
A kind of compound binding agent for producing acid pellet, it is made of following parts by weight of component：0.003~2 part of lime, gather
25~60 parts of 3~8 parts of vinyl alcohol, 0.01~0.5 part of borate and water.
Compound binding agent as described above, it is preferable that the lime is 0.005~1.5 part, and the polyvinyl alcohol is 4~7
Part, the borate is 0.05~0.4 part, and water is 30~55 parts.
Compound binding agent as described above, it is preferable that the borate is Boratex or potassium borate.
A kind of preparation method of compound binding agent as described above, includes the following steps：
Polyvinyl alcohol, be added in hot water, stirring and dissolving by S1, and after adding borate, stirring forms mixture；
S2, add lime in the mixture after the step S1, and insulation, after fully mixing, powder is obtained through pervaporation
The compound binding agent of shape.
Preparation method as described above, it is preferable that in step sl, hot water as described above is 75~80 DEG C, described to stir
Mix time preferably 5~10min of dissolving.
Preparation method as described above, it is preferable that in step s 2, the condition of the insulation is 85~100 DEG C, during insulation
Between when being 1~2 small.
A kind of application method of compound binding agent as described above, in acid pellet is produced, the compound binding agent makes
Dosage is weight percentage 0.15~1.0%.
Further, the preferable usage amount of the compound binding agent is weight percentage 0.25~0.5%.
(3) beneficial effect
The beneficial effects of the invention are as follows：
The compound binding agent of the present invention can change the interface energy between particle when producing acid pellet, suitable to divide
The binding agent of minor structure can not only improve the viscosity of solution between green-ball endoparticle, and strong change can also be produced in particle surface
Absorption is learned, strengthens the hydrophily of particle surface, corresponding chemical action, viscous effect energy and capillary attraction is improved, from
And improve the intensity of green-ball.The compound binding agent of the present invention can significantly improve the drop strength and compression strength of green-ball, and substantially
Improve pelletizing burst temperature, when the compression strength of agglomerates greatly improves.
Embodiment
In order to preferably explain the present invention, in order to understand, by embodiment, the present invention is described in detail.
Embodiment 1
First prepare NEW TYPE OF COMPOSITE binding agent：5kg polyvinyl alcohol, be dissolved in the hot water of 80 DEG C of 40kg temperature by S1, and magnetic force stirs
Dissolving is mixed, adds 0.2kg Boratexes, stirring forms mixture；S2, add the lime of 0.01kg in said mixture, 90 DEG C
1.5h is kept the temperature, after fully mixing, powdered compound binding agent is obtained through pervaporation.
Take the compound binding agents of above-mentioned different amounts to add water to carry out stewing material 30min with 3kg iron ore concentrates, with iron ore concentrate according to
Vexed good material is put into disc balling machine and carries out spin and produces general acid pellet, rotating speed is 30r/min during spin, and inclination angle is
45 °, for the control of the additive amount of moisture 8% or so of raw material gross weight, the method for spin is to add fraction of raw material at first, and is added
Enter appropriate water and make mother bulb, allow pelletizing gradually to roll greatly when the quantity and size of mother bulb reach the water spray side charging of certain condition back,
Be off feeding when pelletizing size reaches appropriate size, allow pelletizing continue continue in disc balling machine roll 5-10min with
Further allow pelletizing to roll more closely knit, achieve the purpose that to improve pellet strength.By the life for the size qualification produced
Ball selects the measurement that part carries out drop strength, compression strength and burst temperature, and another part is then put into it in baking oven and carries out
Drying and processing, drying temperature are 120 DEG C, drying time 120min, then measure the drop strength and compression strength of dry bulb, and
High-temperature roasting is carried out to part, calcination temperature is 1250 DEG C, roasting time 25min, after the completion of roasting, by roasting ball out of stove
Taking-up is put to be allowed to cool to room temperature in atmosphere, then measures compression strength, the Muffle furnace used in oxidizing roasting and blowing air.Survey
Method for testing uses the traditional test methods of this area, and it is as shown in table 1 to measure experimental data.
1. compound binding agent of table is to preparing acid pellet performance test data
Lot of experiments is found, when the excessively dosage of addition compound binding agent, the oxidation ball of preparation can be made on the contrary
Resistance to compression after the roasting of group slightly reduces, so when preparing acid pellet, the suitable usage amount of compound binding agent is weight percent
Than 0.25~0.5%.
As a comparison case, using bentonite commonly used in the prior art, its component composition is that weight ratio is 69.7%
SiO2, 16.57% Al2O3, 2.07% Fe2O3, 2.42% CaO, 1.16% MgO be used to prepare oxygen in embodiment 1
Pellet, under equal conditions, replaces above-mentioned compound binding agent with bentonite and is tested, test result shows, equal dosage
Bentonite production pelletizing performance not as good as the performance of compound binding agent in the present embodiment, and compoiste adhering prepared by the present invention
The cost of agent will be less than bentonitic cost.
Embodiment 2
First prepare NEW TYPE OF COMPOSITE binding agent：7kg polyvinyl alcohol, be dissolved in the hot water of 80 DEG C of 55kg temperature by S1, and magnetic force stirs
10min dissolvings are mixed, add 0.4kg potassium borates, stirring forms mixture；S2, add the lime of 1kg in said mixture, 100
DEG C insulation 1h, fully mix after, obtain powdered compound binding agent through pervaporation.
The binding agent 0.05kg of above-mentioned preparation is taken, is added in 9.95kg iron ore concentrates, as 1 conditional of embodiment prepares oxidation ball
Group, prepared pelletizing will detect, and compression strength of green pel let is up to 40N, and roasting ball compression strength is up to 2708N.
The above described is only a preferred embodiment of the present invention, being not the limitation that other forms are done to the present invention, appoint
What those skilled in the art can be changed or be modified as the equivalence enforcement of equivalent variations using technology contents disclosed above
Example.But it is every without departing from technical solution of the present invention content, what the technical spirit according to the present invention made above example appoints
What simple modification, equivalent variations and remodeling, still falls within the protection domain of technical solution of the present invention.
Claims (8)
1. a kind of compound binding agent for producing acid pellet, it is characterised in that it is made of following parts by weight of component：Lime
25-60 parts of 0.003~2 part, 3~8 parts of polyvinyl alcohol, 0.01~0.5 part of borate and water.
2. compound binding agent as claimed in claim 1, it is characterised in that the lime is 0.005~1.5 part, the poly- second
Enol is 4~7 parts, and the borate is 0.05~0.4 part, and the water is 30~55 parts.
3. compound binding agent as claimed in claim 1 or 2, it is characterised in that the borate is Boratex or potassium borate.
4. the preparation method of a kind of compound binding agent as any one of claim 1-3, it is characterised in that including as follows
Step：
Polyvinyl alcohol, be added in hot water, stirring and dissolving by S1, and after adding borate, stirring forms mixture；
S2, add lime in the mixture after the step S1, and insulation, after fully mixing, obtains powdered through pervaporation
Compound binding agent.
5. preparation method as claimed in claim 4, it is characterised in that in step sl, the temperature of the hot water is 75~80
DEG C, the time of the stirring and dissolving is 5~10min.
6. preparation method as claimed in claim 4, it is characterised in that in step s 2, the condition of the insulation is 85~100
DEG C, when soaking time is 1~2 small.
7. a kind of application method of the compound binding agent as any one of claim 1-3, it is characterised in that aoxidized in production
In pelletizing, the usage amount of the compound binding agent is weight percentage 0.15~1.0%.
8. the application method of compound binding agent as claimed in claim 7, it is characterised in that the usage amount of the compound binding agent is
Percentage by weight 0.25~0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711376105.7A CN108004395A (en) | 2017-12-19 | 2017-12-19 | A kind of compound binding agent for producing acid pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711376105.7A CN108004395A (en) | 2017-12-19 | 2017-12-19 | A kind of compound binding agent for producing acid pellet |
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| Publication Number | Publication Date |
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| CN108004395A true CN108004395A (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711376105.7A Pending CN108004395A (en) | 2017-12-19 | 2017-12-19 | A kind of compound binding agent for producing acid pellet |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088618A (en) * | 1992-12-23 | 1994-06-29 | 中南工业大学 | Direct reduction technology for compound adhesive cool solidifying globus coal base |
| CN102277487A (en) * | 2011-09-03 | 2011-12-14 | 马鞍山钢铁股份有限公司 | Adhesive for carbon-containing pellets and using method thereof |
| CN103276203A (en) * | 2013-06-20 | 2013-09-04 | 嘉峪关大友企业公司 | Production method of stainless steel dusting ash pellets |
| CN103952544A (en) * | 2014-05-20 | 2014-07-30 | 攀枝花学院 | Compound binder as well as preparation method and application thereof |
| CN105567953A (en) * | 2015-12-28 | 2016-05-11 | 杨群 | Iron-containing organic metallurgical pellet binder and preparation method thereof |
-
2017
- 2017-12-19 CN CN201711376105.7A patent/CN108004395A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088618A (en) * | 1992-12-23 | 1994-06-29 | 中南工业大学 | Direct reduction technology for compound adhesive cool solidifying globus coal base |
| CN102277487A (en) * | 2011-09-03 | 2011-12-14 | 马鞍山钢铁股份有限公司 | Adhesive for carbon-containing pellets and using method thereof |
| CN102277487B (en) * | 2011-09-03 | 2013-05-22 | 马鞍山钢铁股份有限公司 | Adhesive for carbon-containing pellets and using method thereof |
| CN103276203A (en) * | 2013-06-20 | 2013-09-04 | 嘉峪关大友企业公司 | Production method of stainless steel dusting ash pellets |
| CN103952544A (en) * | 2014-05-20 | 2014-07-30 | 攀枝花学院 | Compound binder as well as preparation method and application thereof |
| CN105567953A (en) * | 2015-12-28 | 2016-05-11 | 杨群 | Iron-containing organic metallurgical pellet binder and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 裘炽昌 等: "《常用建筑材料手册（第二版）》", 30 April 1997 * |
| 魏邦柱: "《胶乳·乳液应用技术》", 31 July 2003 * |
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Application publication date: 20180508 |