CN112063835A - Method for treating iron-containing solid waste by using sintering process - Google Patents
Method for treating iron-containing solid waste by using sintering process Download PDFInfo
- Publication number
- CN112063835A CN112063835A CN202010874739.0A CN202010874739A CN112063835A CN 112063835 A CN112063835 A CN 112063835A CN 202010874739 A CN202010874739 A CN 202010874739A CN 112063835 A CN112063835 A CN 112063835A
- Authority
- CN
- China
- Prior art keywords
- percent
- iron
- solid waste
- sintering process
- containing solid
- 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
Images
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
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
-
- 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
- C22B1/16—Sintering; Agglomerating
Abstract
The invention discloses a method for treating iron-containing solid waste by using a sintering process, which comprises the following raw material ingredients in percentage by mass: 2 to 4 percent of steel slag magnetic separation concentrate, 40 to 50 percent of iron ore concentrate, B40 to 45 percent of iron ore powder, C6 to 12 percent of iron ore powder, 3.5 to 8.5 percent of limestone, 0 to 4 percent of light-burned dolomite, 1.5 to 2.5 percent of serpentine, 3.0 to 4.5 percent of quicklime and 4.5 to 6.0 percent of coke powder; adding water into the raw materials, mixing and granulating to obtain a mixture; and distributing the mixture, igniting and sintering to obtain the sinter. The invention mixes the limonite and other iron materials according to a certain proportion, can effectively utilize the limonite to produce the sinter under the condition of ensuring that the quality index of the sinter meets the smelting requirement of a blast furnace, improves the quality index of the sinter, and can effectively reduce the cost of sintering and batching.
Description
Technical Field
The invention relates to the field of metallurgical sinter production, in particular to a method for treating iron-containing solid waste by using a sintering process.
Background
The sintered ore is the most important iron-containing furnace charge of the blast furnace, and at present, the furnace entering iron charge structure of the blast furnace is generally high-alkalinity sintered ore matched with acid pellet ore. In order to reduce the unit consumption of iron materials and the addition amount of alkaline flux and realize the recycling of solid waste, steel slag magnetic separation concentrate is added into a sintering and mixing material, the magnetic separation concentrate is tailings which are obtained by taking hot splashing-magnetic separation concentrate provided by metallurgical slag companies as a raw material and extracting calcium and magnesium elements in the concentrate through carbonization reaction, and the iron-containing solid waste is obtained after a magnetic separation process. The grade of the magnetic concentrate is low and is 38.54%; SiO 22The content is medium, and the content of CaO and MgO is still higher after calcium and magnesium are extracted, which is 12.03 percent and 11.94 percent respectively.
Disclosure of Invention
The invention aims to provide a method for treating iron-containing solid waste by using a sintering process, which comprises the steps of mixing steel slag magnetic separation concentrate with other iron materials according to a certain proportion, and after some technical means are adopted, under the condition that the quality index of sintered minerals meets the smelting requirement of a blast furnace, effectively improving the quality index of the sintered minerals and simultaneously effectively reducing the cost of sintering ingredients.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for treating iron-containing solid waste by using a sintering process comprises the following raw material ingredients in percentage by mass: 2 to 4 percent of steel slag magnetic separation concentrate, 40 to 50 percent of iron ore concentrate, B40 to 45 percent of iron ore powder, C6 to 12 percent of iron ore powder, 3.5 to 8.5 percent of limestone, 0 to 4 percent of light-burned dolomite, 1.5 to 2.5 percent of serpentine, 3.0 to 4.5 percent of quicklime and 4.5 to 6.0 percent of coke powder; adding water into the raw materials, mixing and granulating to obtain a mixture; and distributing the mixture, igniting and sintering to obtain the sinter.
Further, the steel slag magnetic separation concentrate: TFe: 35.0% > E40.0 percent, and the main components comprise the following components in percentage by mass: FeO: 18.0-22.0%, CaO: 10.5% -13.5% of SiO2：4.5％～6.5％、MgO：10.5％～13.5％，P：0.35％～0.55％，Ig：1.5％～2.5％。
Further, the iron ore concentrate a: TFe: 64.5-66.5 percent, and the main components comprise the following components in percentage by mass: FeO: 27.5% -31.0%, CaO: 0.75% -2.35% of SiO2：1.05％～3.5％、MgO：0.65％～1.05％、Na2O：0.05％～0.15％、F：0.08％～0.3％、S：0.65％～0.95％、K2O: 0.05% -0.15%, Ig: 1.0-2.0 percent and the passing rate of a 200-mesh screen is 90-95 percent.
Further, the iron ore powder B: TFe: 59.5-62.5%, the main components by weight percentage are as follows: FeO: 0.40-0.85%, CaO: 0.10% -0.80% of SiO2：4.0％～5.5％、MgO：0.68％～1.15％、P：0～0.15％、S：0.025％～0.120％、Ig：4.5％～6.0％。
Further, iron ore powder C: TFe: 59.30% -61.50%, the main components according to the mass percentage are: FeO: 0-0.1%, CaO: 0 to 0.1% of SiO2：4.0％～5.0％、MgO：0.05％～0.08％、P：0～0.10％、S：0.020％～0.030％、Ig：4.5％～5.5％。
Further: the alkalinity of the sintered ore is 1.95-2.05, and the mass percentage of MgO in the sintered ore is 1.90% -2.10%.
Further: the mass percentage of the water in the mixture is 6.5-8.0%.
Further: and granulating the mixture, wherein the time of the granulating process is controlled to be 4-6 min.
Further: and distributing the granulated mixture.
Further: and igniting the mixture arranged on the sintering device, wherein the ignition time is controlled to be 1-3 min, and the ignition negative pressure is 5000-7000 Pa.
Further: the sintering process is accompanied with air draft treatment, and the negative pressure of the air draft is 9000-12000 Pa.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention mixes the limonite and other iron materials according to a certain proportion, can effectively utilize the limonite to produce the sinter under the condition of ensuring that the quality index of the sinter meets the smelting requirement of a blast furnace, improves the quality index of the sinter, and can effectively reduce the cost of sintering ingredients
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a flow chart of the method for treating iron-containing solid waste by using a sintering process according to the present invention.
Detailed Description
The following description of the embodiments of the present invention is made with reference to the accompanying drawings 1:
the raw materials and the mixture ratio shown in the table 1 and the table 2 are mixed. Adding water into the raw materials in a primary mixer, and uniformly mixing, wherein the water content is controlled to be 7.0%; then granulating in a secondary mixer for 3 min; the granulated mixture is uniformly distributed to a sintering device through a distributing device, the thickness of a material layer is 700mm, ignition is carried out through a sintering igniter, ignition fuel is natural gas, the ignition time is 2.0min, air exhaust is started at the bottom of the sintering device, certain negative pressure is formed under a grate, the ignition negative pressure is 5000Pa, air after ignition is pumped away from the sintering material layer from top to bottom, the sintering air exhaust negative pressure is 10000Pa, and a combustion zone on the surface of the material layer after ignition gradually moves towards the lower material layer along with the completion of combustion of fuel on the upper part. And when the combustion zone reaches the grate, the sintering process is ended to obtain the sinter.
Example (b):
the chemical components of the raw fuel for sintering are shown in table 1, the iron material proportion is shown in table 2, the chemical components of the sinter and the process indexes of the sinter are compared and analyzed under the condition of different steel slag magnetic separation concentrate proportions in the sintered iron material, and the result is shown in table 3.
TABLE 1 chemical composition of raw fuel for sintering (wt%)
The chemical composition and process index of the sintered ore are shown in table 3.
TABLE 2 raw material ratio (wt%)
TABLE 3 chemical composition and Process index of sintered ore of examples
As can be seen from tables 2 and 3:
solid burnup aspect: compared with the reference point, the solid fuel consumption is reduced along with the increase of the proportioning of the steel slag magnetic separation concentrate. In the aspect of drum strength: compared with the reference example, the drum strength tends to increase along with the increase of the proportioning of the magnetic concentrate.
TABLE 4 change in unit consumption of flux and fuel after addition of magnetic concentrate in sintering, kg/t
As can be seen from Table 4, the unit consumption of the total flux (dolomite + limestone + quicklime) is reduced after the magnetic concentrate is added in the sintering process due to the high CaO and MgO contents of the magnetic concentrate. Compared with the method without adding magnetic separation concentrate: 2 percent of magnetic concentrate is added, and the unit consumption of the total flux is reduced by 8.37 kg/t; and 4% of magnetic concentrate is added, so that the unit consumption of the total flux is reduced by 16.93 kg/t.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. The method for treating the iron-containing solid waste by using the sintering process is characterized by comprising the following raw materials in percentage by mass: 2 to 4 percent of steel slag magnetic separation concentrate, 40 to 50 percent of iron ore concentrate, B40 to 45 percent of iron ore powder, C6 to 12 percent of iron ore powder, 3.5 to 8.5 percent of limestone, 0 to 4 percent of light-burned dolomite, 1.5 to 2.5 percent of serpentine, 3.0 to 4.5 percent of quicklime and 4.5 to 6.0 percent of coke powder; adding water into the raw materials, mixing and granulating to obtain a mixture; and distributing the mixture, igniting and sintering to obtain the sinter.
2. The method for treating the iron-containing solid waste by using the sintering process as claimed in claim 1, wherein the steel slag magnetic separation concentrate is: TFe: 35.0-40.0 percent, and the main components comprise the following components in percentage by mass: FeO: 18.0-22.0%, CaO: 10.5% -13.5% of SiO2：4.5％～6.5％、MgO：10.5％～13.5％，P：0.35％～0.55％，Ig：1.5％～2.5％。
3. The method for treating the iron-containing solid waste by using the sintering process according to claim 1, wherein the iron ore concentrate A: TFe: 64.5-66.5 percent, and the main components comprise the following components in percentage by mass: FeO: 27.5% -31.0%, CaO: 0.75% -2.35% of SiO2：1.05％～3.5％、MgO：0.65％～1.05％、Na2O：0.05％～0.15％、F：0.08％～0.3％、S：0.65％～0.95％、K2O: 0.05% -0.15%, Ig: 1.0-2.0 percent and the passing rate of a 200-mesh screen is 90-95 percent.
4. The method for treating iron-containing solid waste by using a sintering process according to claim 1, wherein the iron ore powder B: TFe: 59.5-62.5%, the main components by weight percentage are as follows: FeO: 0.40% -0.85% of CaO：0.10％～0.80％、SiO2：4.0％～5.5％、MgO：0.68％～1.15％、P：0～0.15％、S：0.025％～0.120％、Ig：4.5％～6.0％。
5. The method for treating iron-containing solid waste by using a sintering process according to claim 1, wherein the ratio of iron ore powder C: TFe: 59.30% -61.50%, the main components according to the mass percentage are: FeO: 0-0.1%, CaO: 0 to 0.1% of SiO2：4.0％～5.0％、MgO：0.05％～0.08％、P：0～0.10％、S：0.020％～0.030％、Ig：4.5％～5.5％。
6. The method for treating iron-containing solid waste by using the sintering process as claimed in claim 1, wherein the basicity of the sintered ore is 1.95-2.05, and the mass percentage of MgO in the sintered ore is 1.90-2.10%.
7. The method for treating the iron-containing solid waste by using the sintering process as claimed in claim 1, wherein the mass percentage of the moisture in the mixed material is 6.5-8.0%.
8. The method for treating the iron-containing solid waste by using the sintering process as claimed in claim 7, wherein the mixture is subjected to a granulation process, and the time of the granulation process is controlled to be 4-6 min.
9. The method for treating the iron-containing solid waste by using the sintering process as claimed in claim 8, wherein the mixture arranged on the sintering device is ignited, the ignition time is controlled to be 1-3 min, and the ignition negative pressure is 5000-7000 Pa; the sintering process is accompanied with air draft treatment, and the negative pressure of the air draft is 9000-12000 Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874739.0A CN112063835A (en) | 2020-08-27 | 2020-08-27 | Method for treating iron-containing solid waste by using sintering process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010874739.0A CN112063835A (en) | 2020-08-27 | 2020-08-27 | Method for treating iron-containing solid waste by using sintering process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112063835A true CN112063835A (en) | 2020-12-11 |
Family
ID=73659001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010874739.0A Pending CN112063835A (en) | 2020-08-27 | 2020-08-27 | Method for treating iron-containing solid waste by using sintering process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112063835A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113817917A (en) * | 2021-08-05 | 2021-12-21 | 包头钢铁（集团）有限责任公司 | Ore blending method based on iron ore granularity composition |
| CN113943859A (en) * | 2021-09-27 | 2022-01-18 | 包头钢铁（集团）有限责任公司 | Method for preparing sintered ore by utilizing high-density hematite powder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045857A (en) * | 2012-12-28 | 2013-04-17 | 柳州钢铁股份有限公司 | Production method for sintering converter granulated slag to produce blast-furnace smelting sintered ore |
| CN107460310A (en) * | 2017-08-09 | 2017-12-12 | 包头钢铁（集团）有限责任公司 | A kind of method for preparing sintering deposit |
-
2020
- 2020-08-27 CN CN202010874739.0A patent/CN112063835A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045857A (en) * | 2012-12-28 | 2013-04-17 | 柳州钢铁股份有限公司 | Production method for sintering converter granulated slag to produce blast-furnace smelting sintered ore |
| CN107460310A (en) * | 2017-08-09 | 2017-12-12 | 包头钢铁（集团）有限责任公司 | A kind of method for preparing sintering deposit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113817917A (en) * | 2021-08-05 | 2021-12-21 | 包头钢铁（集团）有限责任公司 | Ore blending method based on iron ore granularity composition |
| CN113943859A (en) * | 2021-09-27 | 2022-01-18 | 包头钢铁（集团）有限责任公司 | Method for preparing sintered ore by utilizing high-density hematite powder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102181610B (en) | Composite slagging agent for making semisteel, and preparation method and using method thereof | |
| CN109576488B (en) | Method for producing sinter by using high-proportion baiyuneboite concentrate | |
| CN109207739B (en) | Method for producing iron-making furnace burden by resource utilization of zinc-containing metallurgical dust | |
| CN108950189B (en) | method for producing MgO-containing sintered ore by using waste magnesia carbon bricks | |
| CN111172385B (en) | Method for preparing sintered ore by using high-crystallization-water iron ore powder | |
| CN104975173A (en) | Production method of fluxed composite carbon-containing pellets used in blast furnace | |
| CN112063835A (en) | Method for treating iron-containing solid waste by using sintering process | |
| CN111118284A (en) | F-containing sinter and production method thereof | |
| CN107488784A (en) | A kind of blast furnace ironmaking superfluxed pellets and its production method | |
| Cao et al. | Making ferronickel from laterite nickel ore by coal-based self-reduction and high temperature melting process | |
| CN110257626B (en) | Method for preparing sinter from steel rolling iron scale and prepared sinter | |
| CN111139332B (en) | Slag former and light and thin scrap steel mixed processing furnace entering process | |
| CN114293010A (en) | Method for preparing sintered ore by adding steel slag through sintering process | |
| CN112080598A (en) | Method and system for comprehensively utilizing slag resources of iron and steel smelting and blast furnace slag tank | |
| CN113943859A (en) | Method for preparing sintered ore by utilizing high-density hematite powder | |
| CN113817917A (en) | Ore blending method based on iron ore granularity composition | |
| CN111154934A (en) | Furnace burden structure ratio for adjusting blast furnace slag MgO | |
| CN104651553A (en) | Steel slag modifier | |
| CN110042227B (en) | Sintered ore and preparation method thereof | |
| CN1035848A (en) | Vanadium chromium leaches tailings ironmaking comprehensive utilization process | |
| FI130083B (en) | Method and apparatus for treating iron-contained raw material using bath smelting furnace | |
| CN116397096A (en) | Method for preparing sinter by using high-silicon Brazil coarse powder | |
| CN114622087A (en) | Method for preparing sintered ore by using iron ore concentrate with high alkali metal content | |
| CN108929931B (en) | Desiliconization agent for pretreatment of molten iron outside blast furnace and preparation and use methods thereof | |
| CN115522013B (en) | Method for effectively solving converter slag re-drying problem and converter re-drying inhibitor |
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 |