CN110079668A - A kind of preparation method and application of bilayer carbonaceous pelletizing - Google Patents
A kind of preparation method and application of bilayer carbonaceous pelletizing Download PDFInfo
- Publication number
- CN110079668A CN110079668A CN201910337244.1A CN201910337244A CN110079668A CN 110079668 A CN110079668 A CN 110079668A CN 201910337244 A CN201910337244 A CN 201910337244A CN 110079668 A CN110079668 A CN 110079668A
- Authority
- CN
- China
- Prior art keywords
- mixture
- carbonaceous pelletizing
- binder
- preparation
- pelletizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to ironmaking technology fields, and in particular to a kind of preparation method and application of bilayer carbonaceous pelletizing.Technical solution is as follows: including the following steps: that the first mixture and the second mixture is respectively prepared by different ratio in Iron Ore Powder, coal dust and binder by (1)；The molar ratio C/O=0.95-1.15 of the oxygen of fixed carbon and ferriferous oxide in first mixture, and the mass percent of the first mixture shared by binder is 1.0%-1.5%；The molar ratio C/O=1.2-1.5 of the oxygen of fixed carbon and ferriferous oxide in second mixture, and the mass percent of the second mixture shared by binder is 2.0%-3.0%；(2) the internal layer centre of sphere that diameter is 5-15mm is made in the first mixture, the double-deck carbonaceous pelletizing for being made that diameter is 10-25mm is overlayed on outside the internal layer centre of sphere using the second mixing package.The present invention can effectively prevent the secondary oxidation in reduction later period, improve the degree of metalization of pelletizing, while decreasing the content of objectionable impurities in pelletizing, improve product quality.
Description
Technical field
The invention belongs to ironmaking technology fields, and in particular to a kind of preparation method and application of bilayer carbonaceous pelletizing.
Background technique
Carbonaceous pelletizing refers to Iron Ore Powder, fine particles containing carbon and binder by certain proportion, is made after mixing well certain
The agglomerate of granularity.Compared with conventional oxidation pelletizing, carbonaceous pelletizing itself has reducing agent, does not depend on the also Primordial Qi in outside atmosphere
Body, rate of reduction are substantially better than common pelletizing.In the industrial production of carbonaceous pelletizing, green-ball mixed carbon comtent directly affects pelletizing
Final degree of metalization, mixed carbon comtent is too low to will cause being not thorough for ferriferous oxide reduction inside pelletizing, and the on the one hand meeting of excessive carbon
The waste of resource is caused, while can also bring the ferrous grade that more impurity thereby reduce pelletizing into.Therefore, guaranteeing finally
Under the premise of degree of metalization, seek under lower mixed carbon comtent reasonably to match carbon mode to be to improve coal utilizaton rate, improve product matter
The important channel of amount.
Summary of the invention
A kind of preparation method and application of double-deck carbonaceous pelletizing provided by the invention, can effectively prevent the two of reduction later period
Secondary oxidation, improves the degree of metalization of pelletizing, while decreasing the content of objectionable impurities in pelletizing, improves product quality.
Technical scheme is as follows:
A kind of preparation method of bilayer carbonaceous pelletizing, includes the following steps:
(1) the first mixture and the second mixture is respectively prepared by different ratio in Iron Ore Powder, coal dust and binder；First
The molar ratio C/O=0.95-1.15 of the oxygen of fixed carbon and ferriferous oxide in mixture, and the matter of the first mixture shared by binder
Amount percentage is 1.0%-1.5%；The molar ratio C/O=1.2-1.5 of the oxygen of fixed carbon and ferriferous oxide in second mixture, and
The mass percent of second mixture shared by binder is 2.0%-3.0%；
(2) the internal layer centre of sphere that diameter is 5-15mm is made in the first mixture, is overlayed in described using the second mixing package
The double-deck carbonaceous pelletizing that diameter is 10-25mm is made outside the layer centre of sphere, controls the volume ratio of the internal layer centre of sphere and outer layer spherical shell
For 2:1-1:1.
Further, the preparation method of the double-deck carbonaceous pelletizing, wherein the Iron Ore Powder is a seed type Iron Ore Powder
Or the mixture of multiple types Iron Ore Powder.
Further, the preparation method of the double-deck carbonaceous pelletizing, wherein the coal dust is a seed type coal dust or more
The mixture of seed type coal dust.
Further, the preparation method of the double-deck carbonaceous pelletizing, wherein the binder is a kind of types of binders
Or the mixture of multiple types binder.
A kind of application of bilayer carbonaceous pelletizing, the bilayer made from the preparation method of the above-mentioned double-deck carbonaceous pelletizing is contained
Carbon pellets are put into high temperature furnace and restore, and temperature is 900-1250 DEG C, recovery time 15-120min.
The invention has the benefit that method of the invention is compared with traditional carbonaceous pelletizing preparation method, due to outer layer carbon
Oxygen is higher, can effectively prevent the secondary oxidation in reduction later period, improve the degree of metalization of pelletizing, while decrease in pelletizing and have
The content of evil impurity, improves product quality.For the double-deck carbonaceous pelletizing in reduction process, reduction initial stage substantially will not be by surrounding gas
The reduction later period has only been arrived in the influence of atmosphere, and the double-deck carbonaceous pelletizing outer layer carbon is totally consumed, and carbon residue exists only in double-deck containing carbon ball
Group is internal.The double-deck carbonaceous pelletizing outer layer is in oxidizing atmosphere at this time, it may occur that reoxidizes phenomenon.Above-mentioned phenomenon is in experiment and mould
It is observed in quasi- calculating.Therefore, it is high outside and low outside that the double-deck carbonaceous pelletizing, which reasonably matches carbon mode,.
Specific embodiment
Embodiment 1:
The ingredient of bloodstone employed in the present embodiment and coal dust is shown in Tables 1 and 2 respectively, and binder uses bentonite.
Wherein, the first mixture C/O molar ratio is 1, and the mass percent of the first mixture shared by binder is 1.0%, the second mixing
Expect that C/O molar ratio is 1.2, the mass percent of the first mixture shared by binder is 2.0%, and diameter is made in the first mixture
For the internal layer centre of sphere of 10mm, the double-deck carbonaceous pelletizing that diameter is 15mm is made with addition of the second mixture.The double-deck carbonaceous pelletizing is set
In reduction furnace, temperature is 1200 DEG C, recovery time 20min, and gained pelletizing degree of metalization is 87.92%.
1 bloodstone ingredient (wt/%) of table
2 coal chemistry ingredient (wt/%) of table
Embodiment 2:
Bloodstone, coal dust and the bentonite ingredient used in the present embodiment is same as Example 1.Wherein, the first mixture
C/O molar ratio is 1.1, and the mass percent of the first mixture shared by binder is 1.3%；Second mixture C/O molar ratio is
1.4, the mass percent of the first mixture shared by binder is 2.5%.The internal layer that diameter is 15mm is made in first mixture
The double-deck carbonaceous pelletizing that diameter is 19mm is made with addition of the second mixture in the centre of sphere.The double-deck carbonaceous pelletizing is placed in reduction furnace, temperature
Degree is 1250 DEG C, recovery time 20min, and gained pelletizing degree of metalization is 89.33%.
Claims (5)
1. a kind of preparation method of bilayer carbonaceous pelletizing, which comprises the steps of:
(1) the first mixture and the second mixture is respectively prepared by different ratio in Iron Ore Powder, coal dust and binder；First mixing
The molar ratio C/O=0.95-1.15 of the oxygen of fixed carbon and ferriferous oxide in material, and the quality hundred of the first mixture shared by binder
Divide than being 1.0%-1.5%；The molar ratio C/O=1.2-1.5 of the oxygen of fixed carbon and ferriferous oxide in second mixture, and bond
The mass percent of second mixture shared by agent is 2.0%-3.0%；
(2) the internal layer centre of sphere that diameter is 5-15mm is made in the first mixture, overlays on the internal layer ball using the second mixing package
The double-deck carbonaceous pelletizing that diameter is 10-25mm is made outside the heart, the volume ratio for controlling the internal layer centre of sphere and outer layer spherical shell is 2:
1-1:1。
2. the preparation method of bilayer carbonaceous pelletizing according to claim 1, which is characterized in that the Iron Ore Powder is a type
The mixture of sections miberal powder or multiple types Iron Ore Powder.
3. the preparation method of bilayer carbonaceous pelletizing according to claim 1, which is characterized in that the coal dust is a seed type
The mixture of coal dust or multiple types coal dust.
4. the preparation method of bilayer carbonaceous pelletizing according to claim 1, which is characterized in that the binder is a type
The mixture of type binder or multiple types binder.
5. a kind of application of bilayer carbonaceous pelletizing, which is characterized in that by the double-deck carbonaceous pelletizing as described in one of claim 1-4
Preparation method made from the double-deck carbonaceous pelletizing be put into high temperature furnace and restore, temperature is 900-1250 DEG C, and the recovery time is
15-120min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910337244.1A CN110079668A (en) | 2019-04-25 | 2019-04-25 | A kind of preparation method and application of bilayer carbonaceous pelletizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910337244.1A CN110079668A (en) | 2019-04-25 | 2019-04-25 | A kind of preparation method and application of bilayer carbonaceous pelletizing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110079668A true CN110079668A (en) | 2019-08-02 |
Family
ID=67416649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910337244.1A Pending CN110079668A (en) | 2019-04-25 | 2019-04-25 | A kind of preparation method and application of bilayer carbonaceous pelletizing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110079668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981093A (en) * | 2021-02-09 | 2021-06-18 | 鞍钢股份有限公司 | Magnesium melt type iron coke composite pellet and hot-pressing manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088212A (en) * | 2013-02-22 | 2013-05-08 | 陈谦 | Method and equipment for preparing carbon-bearing pellets of coal-based direct reduced iron |
| CN103484660A (en) * | 2013-09-13 | 2014-01-01 | 中南大学 | Method for strengthening sintering of high-proportion iron ore concentrate |
| CN104726630A (en) * | 2015-03-25 | 2015-06-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | High-alkalinity composite metallized pellet for converter and production process thereof |
| CN104726698A (en) * | 2015-03-25 | 2015-06-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Acidic composite metallized pellet and production process thereof |
| CN106957984A (en) * | 2017-04-11 | 2017-07-18 | 江苏省冶金设计院有限公司 | A kind of preparation method of mother liquor of stainless steel |
-
2019
- 2019-04-25 CN CN201910337244.1A patent/CN110079668A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088212A (en) * | 2013-02-22 | 2013-05-08 | 陈谦 | Method and equipment for preparing carbon-bearing pellets of coal-based direct reduced iron |
| CN103484660A (en) * | 2013-09-13 | 2014-01-01 | 中南大学 | Method for strengthening sintering of high-proportion iron ore concentrate |
| CN104726630A (en) * | 2015-03-25 | 2015-06-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | High-alkalinity composite metallized pellet for converter and production process thereof |
| CN104726698A (en) * | 2015-03-25 | 2015-06-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Acidic composite metallized pellet and production process thereof |
| CN106957984A (en) * | 2017-04-11 | 2017-07-18 | 江苏省冶金设计院有限公司 | A kind of preparation method of mother liquor of stainless steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981093A (en) * | 2021-02-09 | 2021-06-18 | 鞍钢股份有限公司 | Magnesium melt type iron coke composite pellet and hot-pressing manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100535133C (en) | Steel making lime additive and its production process | |
| CN103320607B (en) | A kind of cold-consolidated ball and preparation method thereof | |
| JP2009144240A (en) | Method of manufacturing molding material for producing sintered ore | |
| CN104232886A (en) | Raw materials for production of oxidized pellets with low reduction expansion rate and preparation method of oxidized pellets | |
| CN103981310A (en) | Method for melting vanadium titano-magnetite by blast furnace | |
| CN110106348B (en) | Composite additive for strengthening sintering of laterite-nickel ore and use method thereof | |
| CN110079668A (en) | A kind of preparation method and application of bilayer carbonaceous pelletizing | |
| JPS60255937A (en) | Manufacture of cold-bound briquette | |
| CN105331808A (en) | Method for iron ore powder agglomeration | |
| CN110527826B (en) | Sintering method for inhibiting perovskite generation in sintering process | |
| DE3307175C2 (en) | ||
| US2473019A (en) | Production of ferrochromium | |
| CN106337101A (en) | Calcium series top slag modification agent and application method thereof | |
| CN104087698B (en) | Pig iron carburization technique by coal-base direct reduction | |
| CN110343796B (en) | Method for reducing iron loss in blast furnace smelting of vanadium titano-magnetite | |
| CN110894572B (en) | Additive for reducing roasting temperature of high-silicon magnetite concentrate pellets and application method thereof | |
| CN111575442B (en) | Low-melting-point high-efficiency desulfurizing agent and preparation and application methods thereof | |
| CN104419824A (en) | Material distribution method for producing pre-reduced agglomerate | |
| JPH0285324A (en) | Operating method for sintering low in nox | |
| CN109852745B (en) | Magnesium-iron-calcium complex composite flux for iron-making sinter | |
| JPS63282216A (en) | Manufacture of sintered ore excellent in reducibility | |
| CN108660272B (en) | Blast furnace composite furnace protection burden and preparation and furnace protection methods thereof | |
| CN111763822A (en) | Method for producing sintered ore from superfine iron concentrate powder | |
| CN111286575A (en) | Reduction iron-making complexing agent and preparation method and application thereof | |
| CN113481364B (en) | Preparation method of vanadium titano-magnetite carbon-containing pellets suitable for rotary kiln iron-making process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190802 |
|
| RJ01 | Rejection of invention patent application after publication |