CN111996369A - Ferrochromium powder ball for steelmaking and preparation method thereof - Google Patents
Ferrochromium powder ball for steelmaking and preparation method thereof Download PDFInfo
- Publication number
- CN111996369A CN111996369A CN202010887205.1A CN202010887205A CN111996369A CN 111996369 A CN111996369 A CN 111996369A CN 202010887205 A CN202010887205 A CN 202010887205A CN 111996369 A CN111996369 A CN 111996369A
- Authority
- CN
- China
- Prior art keywords
- ferrochrome powder
- steelmaking
- ferrochrome
- ball
- 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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
Abstract
The invention discloses a ferrochrome powder ball for steelmaking and a preparation method thereof, the ferrochrome powder ball is prepared by adding a binder into ferrochrome powder generated after various ferrochromes are crushed, mixing, pressing, forming, drying and cooling, wherein the weight of ferrochrome powder accounts for 96-98.5% of the total weight of raw materials, the weight of the added binder accounts for 1.5-4% of the weight of the ferrochrome powder, and the sum of the component proportions of the ferrochrome powder and the binder is 100%; the grain size of the prepared ferrochrome powder ball is 10-50mm or 20-60 mm. The ferrochrome powder ball is prepared by adding the binder into the powder generated by crushing various ferrochromes, can replace the existing ferrochrome, ensures that the alloy components are controlled when the steelmaking alloying elements reach the standard, and the narrow component control of the alloy is promoted, can reduce environmental pollution and save resources and energy, has obvious economic benefit when being used for a steelmaking process, accords with the sustainable development strategy, and is suitable for popularization and use.
Description
Technical Field
The invention relates to the technical field of steel making, in particular to ferrochrome powder balls for steel making and a preparation method thereof.
Background
The smelting stainless steel and weathering resistant steel both adopt ferrochrome as additive, and the grain size of 10-50mm or 20-60mm is needed for steel making and furnace charging. Ferrochromium has high hardness, generates a large amount of powder during crushing, pollutes the environment when the powder is melted at high temperature, has low chromium yield and brings influence on smelting. Therefore, the steel mill has higher requirements on the grain size control of the ferrochrome and high purchase price, and the steel mill urgently needs a product with the consistent components to replace the ferrochrome.
Disclosure of Invention
The invention aims to provide ferrochrome powder balls for steelmaking and a preparation method thereof, aiming at the problems in the prior art.
The invention aims to solve the problems by the following technical scheme:
a ferrochrome powder ball for steelmaking is characterized in that: the ferrochrome powder ball is prepared by adding a binder into ferrochrome powder generated by crushing various ferrochromes, wherein the weight of the ferrochrome powder accounts for 96-98.5% of the total weight of the raw materials, the weight of the added binder accounts for 1.5-4% of the weight of the ferrochrome powder, and the sum of the component proportions of the ferrochrome powder and the binder is 100%; the grain size of the prepared ferrochrome powder ball is 10-50mm or 20-60 mm.
2. The ferrochrome powder ball for steelmaking as set forth in claim 1, wherein: the prepared ferrochrome powder ball contains 50-69 wt% of Cr, less than or equal to 1.5wt% of Si, less than or equal to 0.06wt% of S, less than or equal to 0.06wt% of P, less than or equal to 10wt% of C, less than or equal to 0.03wt% of Ca and the balance of Fe.
The ferrochrome powder is at least one of high-carbon ferrochrome powder, medium-carbon ferrochrome powder, low-carbon ferrochrome powder and micro-carbon ferrochrome powder.
The binder is at least one of sodium silicate, silica sol and polyvinyl alcohol.
A preparation method of ferrochrome powder balls for steelmaking is characterized by comprising the following steps: the preparation method comprises the following steps:
a. adding the raw materials of 96-98.5 wt% of ferrochromium powder and 1.5-4 wt% of adhesive into a stirrer and uniformly stirring;
b. putting the uniformly stirred raw materials into a pressure forming machine to be pressed and formed into ferrochrome powder balls;
c. putting the pressed and molded ferrochrome powder balls into a hot air circulation tunnel kiln with the drying temperature of 150-200 ℃ for drying;
d. naturally cooling the dried ferrochrome powder balls and packaging to obtain the required ferrochrome powder balls for steelmaking.
The pressure of the pressure forming machine in the step b is not less than 150T, and the pressure forming machine is a double-roller type strong forming machine.
The feeding and pressing process of the pressure forming machine in the step b comprises the following steps: the uniformly stirred raw materials are conveyed to a lifter through a conveying belt and then are uniformly put into a pressure forming machine for prepressing, the raw materials are conveyed into a double-roller main pressing forming machine for main pressing forming after the prepressing is finished, and the ferrochrome powder balls meeting the requirements are screened out through a screen mesh.
The mesh size of the screen is 10-50mm or 20-60 mm.
And c, drying the hot air circulation tunnel kiln in the step c at the temperature of 160-200 ℃.
Compared with the prior art, the invention has the following advantages:
the ferrochrome powder ball is prepared by adding the binder into the powder generated by crushing various ferrochromes, can replace the existing ferrochrome, ensures that the alloy components are controlled when the steelmaking alloying elements reach the standard, and the narrow component control of the alloy is promoted, can reduce environmental pollution and save resources and energy, has obvious economic benefit when being used for a steelmaking process, accords with the sustainable development strategy, and is suitable for popularization and use.
Detailed Description
The present invention will be further described with reference to the following examples.
The ferrochrome powder ball for steelmaking is prepared by adding a binder into ferrochrome powder generated after various ferrochrome are crushed, wherein the weight of ferrochrome powder accounts for 96-98.5 percent of the total weight of raw materials, the weight of the added binder accounts for 1.5-4 percent of the weight of the ferrochrome powder, and the sum of the component proportions of the ferrochrome powder and the binder is 100 percent; the grain size of the prepared ferrochrome powder ball is 10-50mm or 20-60 mm. The weight of the prepared ferrochrome powder ball contains 50 to 69 weight percent of Cr, less than or equal to 1.5 weight percent of Si, less than or equal to 0.06 weight percent of S, less than or equal to 0.06 weight percent of P, less than or equal to 10 weight percent of C, less than or equal to 0.03 weight percent of Ca and the balance of Fe.
In the aspect of raw materials, the ferrochrome powder is at least one of high-carbon ferrochrome powder, medium-carbon ferrochrome powder, low-carbon ferrochrome powder and micro-carbon ferrochrome powder; the binder is at least one of sodium silicate, silica sol and polyvinyl alcohol.
A preparation method of ferrochrome powder balls for steelmaking comprises the following steps: a. adding the raw materials of 96-98.5 wt% of ferrochromium powder and 1.5-4 wt% of adhesive into a stirrer and uniformly stirring; b. putting the uniformly stirred raw materials into a double-roller type powerful forming machine with the pressure not less than 150T for pressing and forming into ferrochrome powder balls, and the specific process comprises the following steps: the uniformly stirred raw materials are conveyed to a lifter through a conveying belt and then uniformly put into a double-roller type strong forming machine for prepressing, the materials are conveyed into double-roller type main pressing forming after the prepressing is finished, and ferrochrome powder balls with the specification of 10-50mm or 20-60mm are screened out through a screen mesh; c. putting the pressed and molded ferrochrome powder balls into a hot air circulation tunnel kiln with the drying temperature of 150-200 ℃ for drying; d. naturally cooling the dried ferrochrome powder balls and packaging to obtain the required ferrochrome powder balls for steelmaking.
The ferrochrome powder ball is prepared by adding the binder into the powder generated by crushing various ferrochromes, can replace the existing ferrochrome, ensures that the alloy components are controlled when the steelmaking alloying elements reach the standard, and the narrow component control of the alloy is promoted, can reduce environmental pollution and save resources and energy, has obvious economic benefit when being used for a steelmaking process, accords with the sustainable development strategy, and is suitable for popularization and use.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical scheme according to the technical idea proposed by the present invention falls within the protection scope of the present invention; the technology not related to the invention can be realized by the prior art.
Claims (9)
1. A ferrochrome powder ball for steelmaking is characterized in that: the ferrochrome powder ball is prepared by adding a binder into ferrochrome powder generated by crushing various ferrochromes, wherein the weight of the ferrochrome powder accounts for 96-98.5% of the total weight of the raw materials, the weight of the added binder accounts for 1.5-4% of the weight of the ferrochrome powder, and the sum of the component proportions of the ferrochrome powder and the binder is 100%; the grain size of the prepared ferrochrome powder ball is 10-50mm or 20-60 mm.
2. The ferrochrome powder ball for steelmaking as set forth in claim 1, wherein: the prepared ferrochrome powder ball contains 50-69 wt% of Cr, less than or equal to 1.5wt% of Si, less than or equal to 0.06wt% of S, less than or equal to 0.06wt% of P, less than or equal to 10wt% of C, less than or equal to 0.03wt% of Ca and the balance of Fe.
3. The ferrochrome powder ball for steelmaking as set forth in claim 1, wherein: the ferrochrome powder is at least one of high-carbon ferrochrome powder, medium-carbon ferrochrome powder, low-carbon ferrochrome powder and micro-carbon ferrochrome powder.
4. The ferrochrome powder ball for steelmaking as set forth in claim 1, wherein: the binder is at least one of sodium silicate, silica sol and polyvinyl alcohol.
5. The method for preparing ferrochrome powder balls for steelmaking as set forth in any one of claims 1 to 4, wherein the method comprises the steps of: the preparation method comprises the following steps:
a. adding the raw materials of 96-98.5 wt% of ferrochromium powder and 1.5-4 wt% of adhesive into a stirrer and uniformly stirring;
b. putting the uniformly stirred raw materials into a pressure forming machine to be pressed and formed into ferrochrome powder balls;
c. putting the pressed and molded ferrochrome powder balls into a hot air circulation tunnel kiln with the drying temperature of 150-200 ℃ for drying;
d. naturally cooling the dried ferrochrome powder balls and packaging to obtain the required ferrochrome powder balls for steelmaking.
6. The ferrochrome powder ball for steelmaking as set forth in claim 5, wherein: the pressure of the pressure forming machine in the step b is not less than 150T, and the pressure forming machine is a double-roller type strong forming machine.
7. The ferrochrome powder ball for steelmaking as set forth in claim 6, wherein: the feeding and pressing process of the pressure forming machine in the step b comprises the following steps: the uniformly stirred raw materials are conveyed to a lifter through a conveying belt and then are uniformly put into a pressure forming machine for prepressing, the raw materials are conveyed into a double-roller main pressing forming machine for main pressing forming after the prepressing is finished, and the ferrochrome powder balls meeting the requirements are screened out through a screen mesh.
8. The ferrochrome powder ball for steelmaking as set forth in claim 7, wherein: the mesh size of the screen is 10-50mm or 20-60 mm.
9. The ferrochrome powder ball for steelmaking as set forth in claim 5, wherein: and c, drying the hot air circulation tunnel kiln in the step c at the temperature of 160-200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010887205.1A CN111996369A (en) | 2020-08-28 | 2020-08-28 | Ferrochromium powder ball for steelmaking and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010887205.1A CN111996369A (en) | 2020-08-28 | 2020-08-28 | Ferrochromium powder ball for steelmaking and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111996369A true CN111996369A (en) | 2020-11-27 |
Family
ID=73465997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010887205.1A Pending CN111996369A (en) | 2020-08-28 | 2020-08-28 | Ferrochromium powder ball for steelmaking and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111996369A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899426A (en) * | 2021-01-19 | 2021-06-04 | 乔柏人 | Process for producing ferrochromium alloy by using tunnel kiln |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060682A (en) * | 1990-10-10 | 1992-04-29 | 上海宝山钢铁总厂 | The ball making method of alloy powder material |
| CN1060874A (en) * | 1990-10-20 | 1992-05-06 | 李景林 | Briquetting method for powdered alloy |
| CN1334347A (en) * | 2000-07-17 | 2002-02-06 | 重庆钢铁(集团)有限责任公司 | Process for briquetting alloy powder |
| CN101910427A (en) * | 2008-09-29 | 2010-12-08 | 塔塔钢铁有限公司 | The method of agglomeration of ferroalloy fines such as ferromanganese, ferrochrome and ferrosilicon fines |
| CN104674000A (en) * | 2013-11-28 | 2015-06-03 | 徐存瑞 | Manganese-silicon-carbon ball for steel making and preparation method thereof |
-
2020
- 2020-08-28 CN CN202010887205.1A patent/CN111996369A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060682A (en) * | 1990-10-10 | 1992-04-29 | 上海宝山钢铁总厂 | The ball making method of alloy powder material |
| CN1060874A (en) * | 1990-10-20 | 1992-05-06 | 李景林 | Briquetting method for powdered alloy |
| CN1334347A (en) * | 2000-07-17 | 2002-02-06 | 重庆钢铁(集团)有限责任公司 | Process for briquetting alloy powder |
| CN101910427A (en) * | 2008-09-29 | 2010-12-08 | 塔塔钢铁有限公司 | The method of agglomeration of ferroalloy fines such as ferromanganese, ferrochrome and ferrosilicon fines |
| CN104674000A (en) * | 2013-11-28 | 2015-06-03 | 徐存瑞 | Manganese-silicon-carbon ball for steel making and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王运正等: "《现代锰冶金》", 30 September 2015 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899426A (en) * | 2021-01-19 | 2021-06-04 | 乔柏人 | Process for producing ferrochromium alloy by using tunnel kiln |
| CN112899426B (en) * | 2021-01-19 | 2022-03-25 | 乔柏人 | Process for producing ferrochromium alloy by using tunnel kiln |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101705333B (en) | Reduction and utilization method of dedusting ash of stainless steel | |
| CN101705317B (en) | Harmless process method for chrome slag by utilizing metallurgy sintering and blast furnace | |
| CN109266847B (en) | Preparation method of low-temperature consolidated metallurgical pellets | |
| CN101942571A (en) | Method for innocently treating and recycling chromium residues and metallurgical waste material | |
| CN109266848B (en) | Binder for preparing chromite oxidized pellets | |
| CN103088186B (en) | Slag-making method for rapid dephosphorization of semisteel | |
| CN111996369A (en) | Ferrochromium powder ball for steelmaking and preparation method thereof | |
| CN110699506A (en) | Preparation method for preparing high-carbon ferrochrome from chromium ore powder | |
| CN102051473B (en) | Preparation method of non-sintered carbon-bearing iron pellets | |
| CN104674000A (en) | Manganese-silicon-carbon ball for steel making and preparation method thereof | |
| CN103725875B (en) | High-performance pellet | |
| CN102827624B (en) | Ferrocoke and its production method | |
| CN106319124A (en) | Preparing method for ferrochrome silicon alloy | |
| CN111607677A (en) | Operation method for reducing iron loss of molten iron torpedo ladle | |
| CN108796216B (en) | Pellet iron-magnesium composite binder and preparation and use methods thereof | |
| CN103146914A (en) | Cold-pressed high-strength fluorite pellet binder and use method thereof | |
| CN102628099B (en) | Method for forming balls by cooling and solidifying mineral powder by using water glass as bonding agent | |
| CN104762550A (en) | Hot-press molding process for hot-press briquette | |
| CN101775487A (en) | Production method of block material for ironmaking by using ferroalloy mineral powder | |
| CN101768664B (en) | Binder for metal powder ore cold consolidation so as to substitute for sinter ore and application method thereof | |
| KR20110124408A (en) | Ferroalloy briquette and producing method for the same | |
| CN106755710B (en) | A kind of utilization method of converter smelting stainless steel waste-chromium mud | |
| CN104152679A (en) | Ultrasonic field sintering pallet and ultrasonic reinforced iron ore powder sintering method | |
| CN112899426B (en) | Process for producing ferrochromium alloy by using tunnel kiln | |
| KR102306414B1 (en) | Multi-purpose Fe-containing briquette including high efficiency of heat compensation function and manufacturing method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201127 |