CN114214480A - Environment-friendly steelmaking heating slag melting agent - Google Patents
Environment-friendly steelmaking heating slag melting agent Download PDFInfo
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- CN114214480A CN114214480A CN202111586307.0A CN202111586307A CN114214480A CN 114214480 A CN114214480 A CN 114214480A CN 202111586307 A CN202111586307 A CN 202111586307A CN 114214480 A CN114214480 A CN 114214480A
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- China
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- environment
- carbonaceous material
- exothermic
- friendly
- friendly steelmaking
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/005—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using exothermic reaction compositions
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
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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
- C22B1/2406—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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
- C21C2007/0062—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires with introduction of alloying or treating agents under a compacted form different from a wire, e.g. briquette, pellet
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The embodiment of the invention relates to an environment-friendly steelmaking heating slagging agent, which consists of 50-90 wt% of carbonaceous material, 10-50 wt% of metal magnesium slag and 1-10 wt% of binder; the environment-friendly steelmaking exothermic slagging agent has the advantages that the main raw materials used by the environment-friendly steelmaking exothermic slagging agent are wastes which widely exist in domestic markets or have great influence on the environment and are generated in industrial production. After the raw materials are pressed into balls according to a reasonable proportion, the heating effect of the raw materials is superior to that of the existing similar heating agent, and a method for comprehensively utilizing waste resources is found.
Description
Technical Field
The embodiment of the invention relates to a slagging agent, in particular to an environment-friendly steelmaking heating slagging agent.
Background
With the development of the steel-making industry in China and the increasing shortage of international iron ore resources, the use amount of scrap steel in the steel-making process is continuously increased. However, during smelting in a converter or an electric furnace, the ratio of scrap steel is increased, which inevitably causes insufficient heat in the furnace in the early stage of smelting, and causes the conditions of slow slagging and poor initial slag fluidity, thereby bringing inconvenience to production. In order to solve the problem, steel mills generally add different exothermic agents and a part of slagging agents into a furnace at the initial stage of smelting according to smelting requirements, wherein the exothermic agents are high-grade ferrosilicon, silicon-carbon synthetic balls and the like, and the conventional slagging agents comprise magnesium oxide-containing slagging materials such as light-burned magnesium balls and light-burned dolomite. Such exothermic agents generally contain a certain amount of ferrosilicon, which is expensive to produce and causes a serious environmental load.
The carbon materials in China have wide sources, and common carbon materials capable of providing heat for the steelmaking process comprise carbon-containing substances such as natural graphite, artificial graphite, calcined coal, anthracite, waste electrodes and the like, so that the carbon materials are heating materials with wide sources, low price and good effect.
The magnesium slag is waste material produced in the magnesium smelting production process, about 5.5 tons of magnesium slag are produced in each ton of magnesium smelting, and China can produce a large amount of magnesium slag every year, but most of the magnesium slag is buried and is not friendly to the environment. The main components of the magnesium metal slag comprise 30-40% of calcium oxide, 20-30% of silicon dioxide, 1-5% of magnesium oxide and 20-25% of ferric oxide, and the magnesium metal slag belongs to a low-melting-point material after being refined by magnesium metal, and is very suitable for a slag melting agent for converter steelmaking.
Therefore, after the carbonaceous material and the metal magnesium slag are mixed and subjected to ball pressing treatment, the obtained product can generate heat and rapidly form slag, and is an ideal environment-friendly steelmaking heating slag melting material.
Disclosure of Invention
The invention aims to provide an ideal environment-friendly steelmaking heating slagging material which can not only generate heat, but also can rapidly form slag.
In order to achieve the purpose, the embodiment of the invention designs an environment-friendly steelmaking heating slagging agent, which is characterized by comprising 50-90 wt% of carbonaceous material, 10-50 wt% of metal magnesium slag and 1-10 wt% of binder.
Further, the carbon content in the carbonaceous material is not less than 70% by weight.
Furthermore, the granularity of the carbonaceous material is not more than 3mm, and the granularity of the metal magnesium slag brick is not more than 3 mm.
Further, the carbonaceous material is one or a combination of more of natural graphite, artificial graphite, calcined coal, anthracite and waste electrode.
Furthermore, the magnesium metal slag is a byproduct in the magnesium metal smelting process, and the main components of the magnesium metal slag are calcium oxide, silicon dioxide and ferric oxide.
Further, the carbonaceous material with the granularity not more than 3mm, the metal magnesium slag and the binder are mixed, fully stirred and uniformly mixed, and then pressed into a spherical body or a block body by a high-pressure double-roll ball press.
Compared with the prior art, the environment-friendly steelmaking exothermic slagging agent has the advantages that the main raw materials used by the environment-friendly steelmaking exothermic slagging agent are wastes which are widely available in domestic markets or have great influence on the environment in industrial production. After the raw materials are pressed into balls according to a reasonable proportion, the heating effect of the raw materials is superior to that of the existing similar heating agent, and a method for comprehensively utilizing waste resources is found.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solutions claimed in the claims of the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.
The first embodiment of the invention relates to an environment-friendly steelmaking heating slagging agent, which comprises 50-90 wt% of carbonaceous material, 10-50 wt% of metal magnesium slag and 1-10 wt% of binder.
In the carbonaceous material in the environment-friendly steelmaking heating slag melting agent in the embodiment, the carbon content is not less than 70% by weight.
The particle size of the carbonaceous material in the environment-friendly steelmaking heating slagging agent in the embodiment is not more than 3mm, and the particle size of the metal magnesia slag brick is not more than 3 mm.
The carbonaceous material in the environment-friendly steelmaking heating slag melting agent in the embodiment is one or a combination of a plurality of natural graphite, artificial graphite, calcined coal, anthracite and waste electrodes.
The magnesium slag in the environment-friendly steelmaking heating slagging agent in the embodiment is a byproduct in a magnesium metal smelting process, and the main components of the magnesium slag are calcium oxide, silicon dioxide and ferric oxide.
The environment-friendly steelmaking heating slag melting agent in the embodiment is prepared by mixing the carbonaceous material with the granularity of not more than 3mm, the metal magnesium slag and the binder, fully stirring and uniformly mixing, and then pressing into a spherical body or a block body by using a high-pressure double-roll ball press.
The following provides a detailed description of the preferred embodiments of the present invention.
Example 1: the environment-friendly steelmaking heating slag melting agent is characterized by being prepared from a carbonaceous material, metal magnesium slag and a binder as raw materials in percentage by weight: 55% of carbonaceous material; 40% of metal magnesium slag; 5% of binder.
Example 2: the environment-friendly steelmaking heating slag melting agent is characterized by being prepared from a carbonaceous material, metal magnesium slag and a binder as raw materials in percentage by weight: 65% of carbonaceous material; 30% of metal magnesium slag; 5% of binder.
Example 3: the environment-friendly steelmaking heating slag melting agent is characterized by being prepared from a carbonaceous material, metal magnesium slag and a binder as raw materials in percentage by weight: 75% of carbonaceous material; 20% of metal magnesium slag; 5% of binder.
Example 4: the environment-friendly steelmaking heating slag melting agent is characterized by being prepared from a carbonaceous material, metal magnesium slag and a binder as raw materials in percentage by weight: 85% of carbonaceous material; 10% of metal magnesium slag; 5% of binder.
The raw materials in the above embodiments are weighed, fully stirred and mixed uniformly, and then pressed into a spheroid by a high-pressure double-roller ball press.
The exothermic agent prepared in the above examples is tested in a 250-ton converter in China, 10 furnaces are tested on site in each group of examples, and compared with the carbonaceous exothermic agent currently used, the effect is shown in the following table 1:
TABLE 1 comparison of effects of heat generating agent used in the case of different examples
Note: the above test cases are data obtained under the same molten iron conditions.
From the above examples, it can be seen that the heating and slagging agent prepared by the method of the present invention has a heating effect significantly better than that of the original heating agent, and the slagging time is significantly shortened, and the converter smelting process is accelerated, compared with the original carbon heating agent, under the condition of the same addition amount.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (6)
1. The environment-friendly steelmaking heating slagging agent is characterized by comprising 50-90 wt% of carbonaceous material, 10-50 wt% of metal magnesium slag and 1-10 wt% of binder.
2. The environment-friendly steelmaking exothermic slagging agent according to claim 1, wherein the carbon content in the carbonaceous material is not less than 70% by weight.
3. The environment-friendly steelmaking exothermic slagging agent according to claim 1, wherein the carbonaceous material has a particle size of not more than 3mm, and the magnesite clinker has a particle size of not more than 3 mm.
4. The environment-friendly steelmaking exothermic slagging agent according to claim 1, wherein the carbonaceous material is one or a combination of natural graphite, artificial graphite, calcined coal, anthracite and waste electrodes.
5. The environment-friendly steelmaking exothermic slagging agent according to claim 1, wherein the magnesium slag is a by-product of magnesium metal smelting process, and the main components thereof are calcium oxide, silicon dioxide and iron oxide.
6. The environment-friendly steelmaking exothermic slagging medium as claimed in claim 1, wherein the carbonaceous material with a particle size of not more than 3mm, the metallic magnesium slag and the binder are mixed, fully stirred and mixed uniformly, and then pressed into a spherical body or a block body by a high-pressure double-roll ball press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111586307.0A CN114214480A (en) | 2021-12-23 | 2021-12-23 | Environment-friendly steelmaking heating slag melting agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111586307.0A CN114214480A (en) | 2021-12-23 | 2021-12-23 | Environment-friendly steelmaking heating slag melting agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114214480A true CN114214480A (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111586307.0A Pending CN114214480A (en) | 2021-12-23 | 2021-12-23 | Environment-friendly steelmaking heating slag melting agent |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731069A (en) * | 2012-07-24 | 2012-10-17 | 西安科技大学 | Magnesium slag heating body and preparation method thereof |
| US20170029922A1 (en) * | 2014-04-14 | 2017-02-02 | Heyi TAN | Environmentally friendly treatment method of refining magnesium slag |
| WO2017090929A1 (en) * | 2015-11-25 | 2017-06-01 | 주식회사 포스코 | Refractory composition and well block for steel casting manufactured therefrom |
| CN108165697A (en) * | 2017-12-25 | 2018-06-15 | 上海盛宝冶金科技有限公司 | A kind of pneumatic steelmaking exothermic mixture and its production method |
| CN112853038A (en) * | 2020-12-24 | 2021-05-28 | 上海盛宝冶金科技有限公司 | Environment-friendly carbonaceous exothermic agent for steelmaking and preparation method thereof |
| CN112981049A (en) * | 2021-02-05 | 2021-06-18 | 上海盛宝冶金科技有限公司 | Heating slag melting agent for steelmaking and preparation method thereof |
-
2021
- 2021-12-23 CN CN202111586307.0A patent/CN114214480A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731069A (en) * | 2012-07-24 | 2012-10-17 | 西安科技大学 | Magnesium slag heating body and preparation method thereof |
| US20170029922A1 (en) * | 2014-04-14 | 2017-02-02 | Heyi TAN | Environmentally friendly treatment method of refining magnesium slag |
| WO2017090929A1 (en) * | 2015-11-25 | 2017-06-01 | 주식회사 포스코 | Refractory composition and well block for steel casting manufactured therefrom |
| CN108165697A (en) * | 2017-12-25 | 2018-06-15 | 上海盛宝冶金科技有限公司 | A kind of pneumatic steelmaking exothermic mixture and its production method |
| CN112853038A (en) * | 2020-12-24 | 2021-05-28 | 上海盛宝冶金科技有限公司 | Environment-friendly carbonaceous exothermic agent for steelmaking and preparation method thereof |
| CN112981049A (en) * | 2021-02-05 | 2021-06-18 | 上海盛宝冶金科技有限公司 | Heating slag melting agent for steelmaking and preparation method thereof |
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Application publication date: 20220322 |