CN107723465A - A kind of compound method of pelletizing binding agent containing magnesium - Google Patents
A kind of compound method of pelletizing binding agent containing magnesium Download PDFInfo
- Publication number
- CN107723465A CN107723465A CN201710901638.6A CN201710901638A CN107723465A CN 107723465 A CN107723465 A CN 107723465A CN 201710901638 A CN201710901638 A CN 201710901638A CN 107723465 A CN107723465 A CN 107723465A
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- Prior art keywords
- pelletizing
- binding agent
- agent containing
- containing magnesium
- pellet
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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
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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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
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (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)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to a kind of compound method of pelletizing binding agent containing magnesium, and it is to use to be made up of dead burned magnesia, modified alta-mud, carboxymethyl cellulose and anti-knock agent.Pelletizing is simple with the application method of binding agent containing magnesium, and pelletizing effect is good, does not contain any harmful element, improves metallurgical properties index significant effect, with the increasingly increase of domestic pellet yield, pelletizing will have wide applicability with binding agent containing magnesium.In pelletizing compound with addition of Mg-containing additive after, the metallurgical performance index of pellet is improved, and improves the softening temperature of pellet, reduces softening temperature section, and cohesive zone is thinning, improves bed permeability.Make smooth operation of furnace, reach the purpose of volume increase tar reduction.
Description
Technical field
The present invention relates to a kind of metallurgical, pelletizing technology field, the compound method of particularly a kind of pelletizing binding agent containing magnesium.
Background technology
MgO mainly plays fluxing effect in blast furnace ironmaking process, and bits stream can be improved by containing a certain amount of MgO in molten iron
Dynamic property, reduces the viscosity of slag, is advantageous to desulfurizing iron.
MgO essentially from sintering deposit, because MgO fusing point is up to 2799 DEG C, is burning in blast furnace ironmaking process clinker at present
During knot, part is fused to magnetic iron ore and forms magnesium magnetic iron ore admittedly, when content of MgO is too high, can reduce containing for calcium ferrite in sintering deposit
Amount, so as to reduce sintering deposit mechanical strength.In addition, sintering deposit content of MgO is too high, large effect is also produced to hot index.
Disclosed according to Chinese patent（Bulletin）Number CN105714108A discloses a kind of pellet binder and its pelletizing of production,
It is mainly characterized by, its composition composition percentage by weight is：Magnesium chloride 30%~60%, bentonite 40%~70%.Wherein chlorination
" chlorine " belongs to harmful element to blast furnace and steel material in magnesium.The present invention proposes using dead burned magnesia to solve this problem
With the compound method of the binding agent of modified alta-mud composition.
Contain a small amount of MgO in pellet, high-melting-point liquid phase mineral, such as forsterite can be formed【2MgO·SiO2】With it is inclined
Magnesium silicate【MgO·SiO2】, their fusion temperature is 1890 DEG C and 1557 DEG C respectively, and the softening temperature for improving pellet is referred to
Indicate obvious effect.
After being improved due to pellet softening temperature, the thickness of cohesive zone in blast furnace ironmaking process is reduced, makes air blast resistance
Reduce, improve the blow rate required, enhance blast furnace process, reduce sliding caused by being built the pressure because of caused by blast furnace burden poor air permeability
Expect, collapse material, controls blast furnace accident, improve the usage factor of blast furnace.
The content of the invention
It is an object of the present invention to provide a kind of compound method of pelletizing binding agent containing magnesium, the binding agent being configured in this approach
After pelletizing production, the metallurgical performance of finished ball nodulizing can be improved, base is established for rich-oxygen of blast furnace, coal powder injection, big ore deposit batch operation
Plinth, make smooth operation of furnace, reach volume increase consumption reduction purpose.
The present invention is realized using such method：
The essential mineral of binding agent containing magnesium forms：Binding agent containing magnesium is mainly by dead burned magnesia, modified alta-mud, carboxymethyl cellulose
Being formed with anti-knock agent, wherein weight percent takes dead burned magnesia 25~35%, modified alta-mud 50~60%, anti-knock agent 4~
6%, carboxymethyl cellulose 9-11%.The element being harmful to blast furnace is not contained.
The essential mineral component basis mechanism of binding agent containing magnesium is as follows：
Dead burned magnesia：Why it is exactly that content of MgO therein is high with reheating（It is general to require to be more than 85%）, can be with matching somebody with somebody on a small quantity
Than the requirement that can meets pellet.After pellet contains certain MgO, hot index is improved, blast furnace process stove
Ore deposit direct motion, the effect of increase yield reduction coke ratio can be achieved.
Modified alta-mud：Former bentonite is exactly done into deep processing once, is exactly mainly sodium, the purpose is to increase bentonite
Useful effect.
Anti-knock agent：Mainly green-ball is controlled to be burst in temperature-rise period, because after binding agent containing magnesium is used for pelletizing, green-ball is rising
Warm process easily bursts.
Carboxymethyl cellulose：Bentonitic caking property is mainly improved, it is mixed to form with bentonite meets binding agent, glues
Property increases substantially, and can reduce the dosage of binding agent.
The physical and chemical indexes of binding agent containing magnesium：Chemical index：Content of MgO 30-35% or so, SiO2 content 40-45%, Al2O3 contain
Measure 11-13%.Physical index：Moisture is less than 15%, the mesh of granularity -200 percent of pass more than 90%.
Beneficial effects of the present invention are as follows：
With addition of 3.0% binding agent in pelletizing compound, content of MgO can reach 1.2% in pellet, and initial softening temperature improves
100~150 DEG C, furnace processor increase by 5% or so, ratio of putting coke into furnace about reduces by 10 ㎏.
Pelletizing uses binding agent containing magnesium, and effect is embodied in blast furnace, soft after blast furnace uses the pellet that binding agent containing magnesium produces
Molten band narrows, and blast furnace permeability is improved, furnace condition anterograde, and furnace processor improves.
According to production target, using 3.5% binding agent containing magnesium, the softening temperature of finished ball nodulizing raises 120 DEG C, blast furnace
350 tons of output increased, ratio of putting coke into furnace reduce 9.5kg.
Pelletizing is simple with the application method of binding agent containing magnesium, and pelletizing effect is good, does not contain any harmful element, improves pellet
Metallurgical performance index significant effect, with the increasingly increase of domestic pellet yield, pelletizing binding agent containing magnesium will have widely
Practicality.
In pelletizing compound with addition of Mg-containing additive after, the metallurgical performance index of pellet is improved, improve pellet
Softening temperature, reduce softening temperature section, cohesive zone is thinning, improves bed permeability.Make smooth operation of furnace, reach volume increase tar reduction
Purpose.
With reference to embodiment, the present invention is further illustrated：
Embodiment, a kind of compound method of pelletizing binding agent containing magnesium, its composition combined ingredient：Weight percent takes reheating oxygen
Change magnesium 30%, modified alta-mud 55%, methylcellulose 10%, anti-knock agent 5%.
Mixing：Above-mentioned raw materials composition is mixed with intensive mixer, it is ensured that physical and chemical indexes fully mix.
Fine grinding：Material after mixing is ground and then sieved with Raymond mill, granularity is less than 200 mesh percent of pass after ensureing smalls
More than 90%.
Finished product exports and pelletizing production application：Binding agent suction after sieving, which fills, is transported to pelletizing dispensing ore deposit groove.
Claims (1)
1. a kind of compound method of pelletizing binding agent containing magnesium, it is by magnesium chloride 30%~60%, the institute of bentonite 40%~70%
Composition, it is characterised in that：Weight percent takes dead burned magnesia 25~35%, modified alta-mud 50~60%, and anti-knock agent 4~
6%, carboxymethyl cellulose 9-11%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710901638.6A CN107723465A (en) | 2017-09-28 | 2017-09-28 | A kind of compound method of pelletizing binding agent containing magnesium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710901638.6A CN107723465A (en) | 2017-09-28 | 2017-09-28 | A kind of compound method of pelletizing binding agent containing magnesium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107723465A true CN107723465A (en) | 2018-02-23 |
Family
ID=61208892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710901638.6A Pending CN107723465A (en) | 2017-09-28 | 2017-09-28 | A kind of compound method of pelletizing binding agent containing magnesium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107723465A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136546A (en) * | 2018-09-26 | 2019-01-04 | 芜湖市鹏磊新材料有限公司 | A kind of bentonitic processing method of pellet binder |
| CN109852789A (en) * | 2019-04-25 | 2019-06-07 | 王勇 | A kind of metallurgical briquetting compound binding agent and its production technology |
| CN110923443A (en) * | 2019-11-13 | 2020-03-27 | 鞍钢集团矿业有限公司 | Magnesium binder for improving strength of preheated pellets of magnesium-containing pellets and preparation method and application thereof |
| CN111996370A (en) * | 2020-10-09 | 2020-11-27 | 河南钰镁新材料科技有限公司 | Acid pellet binder and use method thereof |
| CN112126781A (en) * | 2020-10-09 | 2020-12-25 | 河南钰镁新材料科技有限公司 | Complex phase pellet mining binder and use method thereof |
| CN112176180A (en) * | 2020-10-09 | 2021-01-05 | 河南钰镁新材料科技有限公司 | Bentonite-free complex phase pellet and manufacturing method thereof |
Citations (6)
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|---|---|---|---|---|
| CN101270410A (en) * | 2007-03-20 | 2008-09-24 | 尚国洪 | Cold bonded pellet and method of producing the same |
| CN101660041A (en) * | 2009-08-11 | 2010-03-03 | 河南德海源诚矿业有限公司 | Method for manufacturing MgO acid pellets by using molybdenum slag |
| 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 |
| CN104805278A (en) * | 2014-01-23 | 2015-07-29 | 刘天会 | Magnesia pellet binder and preparation method thereof |
| CN105714108A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Pellet binder and pellets produced by same |
| CN105861818A (en) * | 2015-01-23 | 2016-08-17 | 鞍钢股份有限公司 | Efficient composite bentonite for pellets |
-
2017
- 2017-09-28 CN CN201710901638.6A patent/CN107723465A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270410A (en) * | 2007-03-20 | 2008-09-24 | 尚国洪 | Cold bonded pellet and method of producing the same |
| CN101660041A (en) * | 2009-08-11 | 2010-03-03 | 河南德海源诚矿业有限公司 | Method for manufacturing MgO acid pellets by using molybdenum slag |
| 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 |
| CN104805278A (en) * | 2014-01-23 | 2015-07-29 | 刘天会 | Magnesia pellet binder and preparation method thereof |
| CN105714108A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Pellet binder and pellets produced by same |
| CN105861818A (en) * | 2015-01-23 | 2016-08-17 | 鞍钢股份有限公司 | Efficient composite bentonite for pellets |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136546A (en) * | 2018-09-26 | 2019-01-04 | 芜湖市鹏磊新材料有限公司 | A kind of bentonitic processing method of pellet binder |
| CN109852789A (en) * | 2019-04-25 | 2019-06-07 | 王勇 | A kind of metallurgical briquetting compound binding agent and its production technology |
| CN110923443A (en) * | 2019-11-13 | 2020-03-27 | 鞍钢集团矿业有限公司 | Magnesium binder for improving strength of preheated pellets of magnesium-containing pellets and preparation method and application thereof |
| CN111996370A (en) * | 2020-10-09 | 2020-11-27 | 河南钰镁新材料科技有限公司 | Acid pellet binder and use method thereof |
| CN112126781A (en) * | 2020-10-09 | 2020-12-25 | 河南钰镁新材料科技有限公司 | Complex phase pellet mining binder and use method thereof |
| CN112176180A (en) * | 2020-10-09 | 2021-01-05 | 河南钰镁新材料科技有限公司 | Bentonite-free complex phase pellet and manufacturing method thereof |
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Application publication date: 20180223 |