CN111996370A - Acid pellet binder and use method thereof - Google Patents
Acid pellet binder and use method thereof Download PDFInfo
- Publication number
- CN111996370A CN111996370A CN202011069472.4A CN202011069472A CN111996370A CN 111996370 A CN111996370 A CN 111996370A CN 202011069472 A CN202011069472 A CN 202011069472A CN 111996370 A CN111996370 A CN 111996370A
- Authority
- CN
- China
- Prior art keywords
- cementing material
- component
- cementing
- mixing
- binder
- 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
- 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
-
- 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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
Abstract
The invention provides an acid pellet mine binder and a use method thereof, wherein the acid pellet mine binder is composed of an anti-cracking component and a powdery cementing material; SiO in cementing material2Not less than 65%, the sum of CaO and MgO contents is not more than 20.0%, and Al2O3The content is not more than 3.0 percent; the powder fineness of the cementing material is less than 0.045 mm. The invention overcomes the defect that the bentonite is used as the green ball binder, and the main component (such as SiO) of the invention2CaO and MgO) is useful and advantageous for blast furnace slagging, the fibrous anti-explosion component of the invention can avoid the bursting phenomenon of the pellet in the drying and roasting processes, the invention avoids the technical difficulty of uniformly mixing the fibrous component and the powdery cementing material, the anti-explosion component is mixed with the transmitter water necessary for iron concentrate powder pelletizing, and the invention has the advantages of simple and easy uniform mixing and dispersion.
Description
Technical Field
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to an acid pellet binder and a using method thereof.
Background
At present, because bentonite has the function of improving the green pellet performance of magnetite pelletizing, such as green pellet strength, bursting temperature and other indexes, the existing magnetite for producing oxidized pellets generally uses the technology of drying and oxidizing roasting bentonite pelletizing, and the process method has the defect that only acidic or semi-basic pellets can be produced (when the alkalinity is high, the pellets are cracked and pulverized seriously in the roasting production process, so that the operation of shaft furnace or grate rotary kiln equipment is not smooth or accidents in the pellet production process are caused). In addition, the bentonite component in the pellet has the disadvantages of large slag amount and large consumption of coke and limestone in the subsequent blast furnace ironmaking process. If a material can be invented to completely replace bentonite, the main component of the material is SiO2The components such as CaO and MgO which are beneficial to blast furnace slagging have positive significance for saving bentonite, reducing the consumption of blast furnace ironmaking slagging materials, reducing the slag amount and reducing the coke ratio.
Disclosure of Invention
The invention aims to: in view of the above-mentioned circumstances, and in order to overcome the disadvantages of the prior art, the object of the present invention is to provide SiO which completely replaces bentonite and whose main component is advantageous for blast furnace slagging2CaO, MgO and the like, and can avoid the cracking of the pellets in the drying and roasting processes.
The technical scheme of the invention is as follows: the acid pellet binder is composed of an anti-cracking component and a powdery cementing material; SiO in cementing material2Not less than 65%, the sum of CaO and MgO contents is not more than 20.0%, and Al2O3The content is not more than 3.0 percent; the powder fineness of the cementing material is less than 0.045 mm; the cementing material is composed of an alkaline cementing material and an acidic cementing material, the alkaline cementing material is formed by mixing and homogenizing one or more than one of quick lime, light-burned dolomite lime and light-burned magnesium oxide, the acidic cementing material is one or more than one of silica fume and silicon dioxide micropowder, and the fineness of the acidic cementing material is not more than 0.015 mm; the anti-bursting component is a fibrous material, the mass fraction of the anti-bursting component is not more than 20% of the mass fraction of the cementing material, the fineness of the fibrous material is not more than 20 mu m, the length of the fibrous material is not more than 25mm, and the fibrous material is one or more of pulp powder, plant fiber and glass fiber.
The method for using the acid pellet mine binder comprises the following steps:
the method comprises the following steps: preparing one or more raw materials of quick lime, light-burned dolomite lime and light-burned magnesium oxide into an alkaline cementing material mixing material according to a proper proportion;
step two: crushing and grinding the acidic cementing material and the alkaline cementing material in a proper proportion to prepare a cementing material with the fineness of less than 0.045mm and uniform components;
step three: mixing an anti-cracking component with the mass fraction of the cementing material being not more than 20% with a proper amount of transmitter water to prepare a suspension of the fibrous material uniformly distributed in the transmitter water;
step four: adding the gelled material into a pelletizer, spraying a proper amount of turbid liquid into the pelletizer, rolling the gelled material of the alkaline binder, the anti-explosion component and the transmitter water together with the bonded materials in a ball disk pelletizer, mixing, homogenizing and pelletizing.
The invention has the beneficial effects that: the invention overcomes the defects that the pellet ore adopts the bentonite as the green pellet binder (such as consumption of bentonite resource and increase of blast furnace slag amount), and the main component (SiO) of the invention2CaO and MgO) is useful and advantageous for blast furnace slagging, the fibrous anti-explosion component of the invention can avoid the bursting phenomenon of the pellet in the drying and roasting processes, the invention avoids the technical difficulty of uniformly mixing the fibrous component and the powdery cementing material, the anti-explosion component is mixed with the transmitter water necessary for iron concentrate powder pelletizing, and the invention has the advantages of simple and easy uniform mixing and dispersion.
The specific implementation mode is as follows:
the following further describes the embodiments of the present invention in detail.
The acid pellet binder is composed of an anti-cracking component and a powdery cementing material; SiO in cementing material2Not less than 65%, the sum of CaO and MgO contents is not more than 20.0%, and Al2O3The content is not more than 3.0 percent; the powder fineness of the cementing material is less than 0.045 mm; the cementing material is composed of an alkaline cementing material and an acidic cementing material, the alkaline cementing material is formed by mixing and homogenizing one or more than one of quick lime, light-burned dolomite lime and light-burned magnesium oxide, the acidic cementing material is one or more than one of silica fume and silicon dioxide micropowder, and the fineness of the acidic cementing material is not more than 0.015 mm; the anti-bursting component is a fibrous material, the mass fraction of the anti-bursting component is not more than 20% of the mass fraction of the cementing material, the fineness of the fibrous material is not more than 20 mu m, the length of the fibrous material is not more than 25mm, and the fibrous material is one or more of pulp powder, plant fiber and glass fiber.
The method for using the acid pellet mine binder comprises the following steps:
the method comprises the following steps: preparing one or more raw materials of quick lime, light-burned dolomite lime and light-burned magnesium oxide into an alkaline cementing material mixing material according to a proper proportion;
step two: crushing and grinding the acidic cementing material and the alkaline cementing material in a proper proportion to prepare a cementing material with the fineness of less than 0.045mm and uniform components;
step three: mixing an anti-cracking component with the mass fraction of the cementing material being not more than 20% with a proper amount of transmitter water to prepare a suspension of the fibrous material uniformly distributed in the transmitter water;
step four: adding the gelled material into a pelletizer, spraying a proper amount of turbid liquid into the pelletizer, rolling, mixing, homogenizing and pelletizing the gelled material, the anti-explosion component and the transmitter water together with the bonded materials in a pellet pelletizer.
The first embodiment is as follows: powdery cementing material prepared from raw materials of silica fume, quicklime and light-burned magnesium oxide, wherein SiO in the cementing material2Content of 60%, fineness of the gelled material of 0.038mm (about 400 mesh), AL2O3The content is 2.0 percent, the fibrous material used by the anti-bursting component is glass fiber, the fineness of the glass fiber is not more than 8 mu m, and the length of the glass fiber is not more than 15 mm. The mass fraction of the anti-bursting component is 12% of the mass fraction of the cementing material.
The acid pellet binder of this example was used:
the method comprises the following steps: mixing quicklime and light-burned magnesia in a ratio of 60: 40, preparing an alkaline cementing material mixture;
step two: mixing the silica fume and the alkaline cementing material according to the weight ratio of 70: 30, adding the mixture into a jaw crusher for crushing, and then grinding the crushed mixture in a ball mill to prepare a cementing material with the fineness of less than 0.038mm (about 400 meshes) and uniform components;
step three: mixing glass fiber accounting for 12% of the mass fraction of the cementing material with a proper amount of transmitter water in a container to prepare suspension liquid in which the glass fiber is uniformly distributed in the transmitter water;
step four: adding a cementing material into a pelletizer, simultaneously spraying a proper amount of turbid liquid into the pelletizer, rolling, mixing, homogenizing and pelletizing the cementing material, the anti-explosion component and transmitter water together with the bonded materials in a pellet pelletizer; the acid pellet binder plays a role in binding.
In the conventional technology, magnetite concentrate and a binder are mixed with transmitter water to prepare a compact wet ball, the compact wet ball shrinks in the drying process, and when the transmitter water is evaporated, evaporated and dried between a dried shell and a wet core under the condition of temperature difference and humidity difference between the inside and the outside of the wet ball, a plurality of drying shrinks cause that a steam channel is insufficient (or moisture of the wet core is evaporated too fast) and the steam in the wet core causes burst phenomenon in the drying and increasing process, in the embodiment, glass fiber powder is used as an anti-bursting component, the short glass fiber powder is uniformly filled in the compact wet ball in the ball manufacturing process, the glass fiber not only increases the green strength, but also forms a steam channel, thereby overcoming the defect that the steam channel is seriously insufficient due to the drying shrinkage of only a calcium oxide or magnesium oxide gelling material, and the melting temperature of the glass fiber is lower than the firing temperature 1250 ℃, so that the glass fiber forms liquid phase in the oxidizing and sintering process to raise the strength of pellet owing to the liquid phase consolidation in the pellet
The moisture of the wet ore ball of this example was found to be 12.6%, the falling (0.5 m) strength was greater than 8 times, the compressive strength of the wet ore ball was greater than 20N/ball, the high temperature burst strength of the wet ore ball of this example was 816 ℃, and no burst phenomenon occurred in the wet ore ball of this example when it was dried and fired in the grate and rotary kiln, respectively.
Example two: powdery cementing material prepared from raw materials of silica fume, quicklime and light-burned magnesium oxide, wherein SiO in the cementing material2Content of 60%, fineness of the gelled material of 0.038mm (about 400 mesh), AL2O3The content is 2.0 percent, and the fibrous material used by the anti-bursting component is paper pulp dry powder. The mass fraction of the anti-bursting component (pulp dry powder) is 8 percent of the mass fraction of the gelled material.
The acid pellet binder of this example was used:
the method comprises the following steps: mixing quicklime and light-burned magnesia in a ratio of 55: 45, preparing an alkaline cementing material mixture;
step two: mixing silica fume and an alkaline cementing material according to the weight ratio of 75: 25, adding the materials into a jaw crusher for crushing, and then grinding the materials in a ball mill into a cementing material with the fineness of less than 0.038mm (about 400 meshes) and uniform components;
step three: mixing paper pulp dry powder accounting for 8% of the mass fraction of the cementing material with a proper amount of transmitter water in a container to prepare suspension liquid with glass fibers uniformly distributed in the transmitter water;
step four: adding the cementing material into a pelletizer, and spraying a proper amount of turbid liquid into the pelletizer; rotating the pelletizer to mix the cementing material, the anti-explosion component and the transmitter water together with the bonded material (the magnet concentrate powder) in a ball disk pelletizer, homogenizing, rolling and pelletizing; the acid pellet binder plays a role in binding.
In the embodiment, the dry pulp powder is used as an anti-bursting component and is uniformly filled in the compact wet ball in the pelletizing process, so that the dry pulp powder not only increases the green ball strength, but also forms a steam channel, and the defect of serious shortage of the steam channel caused by drying shrinkage only by using a calcium oxide or magnesium oxide gelling material is overcome.
The moisture of the wet ore ball in the embodiment is 11.6%, the falling (0.5 m) strength is more than 10 times, the compression strength of the wet ore ball is more than 23N/ball, the high-temperature bursting strength of the wet ore ball in the embodiment is 806 ℃, and in the wet ore ball in the embodiment, the high-temperature bursting phenomenon does not occur when the wet ore ball in the embodiment is dried and sintered in a shaft furnace device.
The invention overcomes the defects of using bentonite as green pellet binder (such as consumption of bentonite resource and increase of blast furnace slag content) of pellet ore, and the main components (such as SiO) of the invention2CaO and MgO) is useful and advantageous for blast furnace slagging, the fibrous anti-explosion component of the invention can avoid the occurrence of the burst phenomenon of the pellet in the drying and roasting processes, the invention avoids the technical difficulty of uniformly mixing the fibrous component and the powdery cementing material, and the anti-explosion component is pelletized with iron concentrate powderThe necessary transmitter agent and water are mixed for use, and the advantages of uniform mixing and dispersion are simple and easy.
Claims (2)
1. The binder for the acid pellet ore is characterized by comprising the following components in parts by weight: the acid pellet mineral binder consists of an anti-cracking component and a powdery cementing material; SiO in cementing material2Not less than 65%, the sum of CaO and MgO contents is not more than 20.0%, and Al2O3The content is not more than 3.0 percent; the powder fineness of the cementing material is less than 0.045 mm; the cementing material is composed of an alkaline cementing material and an acidic cementing material, the alkaline cementing material is formed by mixing and homogenizing one or more than one of quick lime, light-burned dolomite lime and light-burned magnesium oxide, the acidic cementing material is one or more than one of silica fume and silicon dioxide micropowder, and the fineness of the acidic cementing material is not more than 0.015 mm; the anti-bursting component is a fibrous material, the mass fraction of the anti-bursting component is not more than 20% of the mass fraction of the cementing material, the fineness of the fibrous material is not more than 20 mu m, the length of the fibrous material is not more than 25mm, and the fibrous material is one or more of pulp powder, plant fiber and glass fiber.
2. The method for using the acid pellet mining binder of claim 1, wherein the method comprises the following steps:
the method comprises the following steps: preparing one or more raw materials of quick lime, light-burned dolomite lime and light-burned magnesium oxide into an alkaline cementing material mixing material according to a proper proportion;
step two: crushing and grinding the acidic cementing material and the alkaline cementing material in a proper proportion to prepare a cementing material with the fineness of less than 0.045mm and uniform components;
step three: mixing an anti-cracking component with the mass fraction of the cementing material being not more than 20% with a proper amount of transmitter water to prepare a suspension of the fibrous material uniformly distributed in the transmitter water;
step four: adding the gelled material into a pelletizer, spraying a proper amount of turbid liquid into the pelletizer, rolling, mixing, homogenizing and pelletizing the gelled material, the anti-explosion component and the transmitter water together with the bonded materials in a pellet pelletizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069472.4A CN111996370A (en) | 2020-10-09 | 2020-10-09 | Acid pellet binder and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069472.4A CN111996370A (en) | 2020-10-09 | 2020-10-09 | Acid pellet binder and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111996370A true CN111996370A (en) | 2020-11-27 |
Family
ID=73475687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011069472.4A Pending CN111996370A (en) | 2020-10-09 | 2020-10-09 | Acid pellet binder and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111996370A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4075027A (en) * | 1975-02-14 | 1978-02-21 | Charcon Products Limited | Consolidation of particulate materials |
| CN1133345A (en) * | 1995-12-19 | 1996-10-16 | 祝朝晖 | Activating carbon magnesium type iron smelting pellets |
| WO2004050924A1 (en) * | 2002-12-02 | 2004-06-17 | Council Of Scientific And Industrial Research | Cold briquetting and pelletisation of mineral fines using an iron-bearing hydraulic binder |
| CN102051474A (en) * | 2010-12-17 | 2011-05-11 | 兰州三普电力有限公司 | Cr-Fe powder ore cold-hardened pellet binder and process for pelleting by using same |
| CN105385848A (en) * | 2015-11-10 | 2016-03-09 | 湖南华菱湘潭钢铁有限公司 | Preparation method of iron ore powder pelletized magnesian binding agent |
| CN105861818A (en) * | 2015-01-23 | 2016-08-17 | 鞍钢股份有限公司 | High performance composite bentonite for pelletizing |
| CN107723465A (en) * | 2017-09-28 | 2018-02-23 | 毕德玉 | A kind of compound method of pelletizing binding agent containing magnesium |
-
2020
- 2020-10-09 CN CN202011069472.4A patent/CN111996370A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4075027A (en) * | 1975-02-14 | 1978-02-21 | Charcon Products Limited | Consolidation of particulate materials |
| CN1133345A (en) * | 1995-12-19 | 1996-10-16 | 祝朝晖 | Activating carbon magnesium type iron smelting pellets |
| WO2004050924A1 (en) * | 2002-12-02 | 2004-06-17 | Council Of Scientific And Industrial Research | Cold briquetting and pelletisation of mineral fines using an iron-bearing hydraulic binder |
| CN102051474A (en) * | 2010-12-17 | 2011-05-11 | 兰州三普电力有限公司 | Cr-Fe powder ore cold-hardened pellet binder and process for pelleting by using same |
| CN105861818A (en) * | 2015-01-23 | 2016-08-17 | 鞍钢股份有限公司 | High performance composite bentonite for pelletizing |
| CN105385848A (en) * | 2015-11-10 | 2016-03-09 | 湖南华菱湘潭钢铁有限公司 | Preparation method of iron ore powder pelletized magnesian binding agent |
| CN107723465A (en) * | 2017-09-28 | 2018-02-23 | 毕德玉 | A kind of compound method of pelletizing binding agent containing magnesium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2090525C1 (en) | Briquets for manufacturing mineral wool, methods for manufacturing briquets and mineral wool | |
| KR101078951B1 (en) | Slag powder composition and concrete composition comprising the same | |
| CN101270410A (en) | Cold bonded pellet and method of producing the same | |
| Pal et al. | Development on iron ore pelletization using calcined lime and MgO combined flux replacing limestone and bentonite | |
| CN102603337A (en) | Method for producing heat storage brick by magnesite tailing | |
| CN109852788B (en) | Method and device for preparing alkaline pellets by using slaked lime | |
| CN101613798B (en) | Puddling additive and predation method thereof | |
| CN101544501B (en) | Forsterite zirconia brick and producing method thereof | |
| CN101921911A (en) | Pellet binder and preparation method thereof | |
| CN103343219B (en) | Method for producing sintered ore by using quick lime | |
| CN102337394A (en) | Composition for fabricating pellets | |
| JP2015137379A (en) | Non-burning carbonaceous material interior ore for blast furnace and manufacturing method therefor | |
| CN111996370A (en) | Acid pellet binder and use method thereof | |
| CN101417867B (en) | Method for preparing silicate magnesium slag concrete by using magnesium slag | |
| CN102816926A (en) | Bentonite used for pellets, and preparation method thereof | |
| CN112126781A (en) | Complex phase pellet mining binder and use method thereof | |
| JP2016160451A (en) | Method for manufacturing carbonaceous material interior ore | |
| CN110894572B (en) | Additive for reducing roasting temperature of high-silicon magnetite concentrate pellets and application method thereof | |
| CN110607438B (en) | Antioxidant calcium adhesive for steel mill fly ash and method for preparing fly ash pellets | |
| CN110343796B (en) | Method for reducing iron loss in blast furnace smelting of vanadium titano-magnetite | |
| JP2002212646A (en) | Method for producing iron ore pellet | |
| CN112126782A (en) | Binder for alkaline pellet mine and preparation method thereof | |
| CN112080634A (en) | Acidic pellet binder and preparation method thereof | |
| US3074806A (en) | Dolomitic refractory | |
| RU2321647C1 (en) | Iron-containing waste material such as scale briquetting method for melting |
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: 20201127 |
|
| RJ01 | Rejection of invention patent application after publication |