CN102296140A - Method of producing cast iron for auto parts with desulfuration residues - Google Patents
Method of producing cast iron for auto parts with desulfuration residues Download PDFInfo
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- CN102296140A CN102296140A CN2011102264443A CN201110226444A CN102296140A CN 102296140 A CN102296140 A CN 102296140A CN 2011102264443 A CN2011102264443 A CN 2011102264443A CN 201110226444 A CN201110226444 A CN 201110226444A CN 102296140 A CN102296140 A CN 102296140A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to comprehensive utilization of desulfuration residues. The method comprises the steps of: grinding and screening the desulfuration residues; reselecting and grinding the desulfuration residues with a grooved shaking table; conducting magnetic separation so as to separate out concentrates and tailings; desulfurizing the concentrates of the desulfuration residues; carrying out burdening and smelting; conducting an inoculation treatment by inoculation in a ladle; implementing spheroidization through a tundish-cover spheroidizing process; and performing casting. The method of the invention is characterized by comprehensively utilizing the desulfuration residues to produce cast iron for production of auto parts, so that the additional value of desulfuration residues is enhanced. Also, the method provided in the invention reduces land occupation and environmental pollution, and has simple operation as well as strong operability.
Description
Technical field
The present invention relates to the comprehensive utilization of desulfurization slag, specifically belong to the desulfurization slag smelting that utilizes the desulfurization generation and pour into auto parts machinery method cylinder iron.
Technical background
Along with the raising that the user requires steel quality, more and more stricter to the requirement that reduces sulphur content in the steel, therefore, the application of molten iron pretreatment desulfurizing more and more widely, the desulfurization quantity of slag of Chan Shenging is bigger thereupon.For a large amount of desulfurization slag that desulfurization produces, because shortage is effectively utilized means, low value-added product be handled or be produced to these desulfurization slag can only in the slag field mode of storing up at present.Owing to need not only waste iron resources through containing a large amount of sulphur and iron in the desulfurization slag after desulfurization and the slag skimming process processing, storing up, take a large amount of soils, and can produce serious harm to environment.
Accelerate industrialization, urbanization construction period because China is in, simultaneously, western developed country has been finished modernization of industry process, and production shifts to China gradually, makes China's economy enter the fast-developing new period.The fast development of cities and towns and motorway for this reason, car industry has also entered the benign cycle stage.
Under the guiding of automobile great demand, the Chinese automobile consumption will continue double-digit growth after 2010.Automobile brake drum series and other automobile chassis parts (as reducing gearbox etc.) etc. have the bigger market requirement.In order to cater to great demand and to make full use of existing raw material and market resource, the present invention produces auto-parts with the waste desulfurization slag of Iron and Steel Production, turn waste into wealth, improve environment, save the area, also improve simultaneously the comprehensive utilization added value of desulfurization slag, filled up the vacancy of its develop rapidly automobile industry.After the invention process, will drive enterprise economic growth, form the recycling economy in zone.Its project technical process advanced person, cost advantage is obvious, will become new profit growth point.
Summary of the invention
The objective of the invention is to solve the land occupation that stacking brought of desulfurization slag, problem of environment pollution caused, provide a kind of and can not only reduce land occupation and environmental pollution, make desulfurization slag obtain comprehensive utilization, produce the desulfurization slag of utilizing that satisfies graphitic cast iron that auto parts machinery uses and spheroidal graphite cast iron and produce the method for the cast iron that auto-parts use.
Realize the technical measures of above-mentioned purpose:
A kind of desulfurization slag of utilizing is produced auto parts machinery method cylinder iron, its step:
1) desulfurization slag to be ground and sieved, granularity is controlled at≤and 0.5 millimeter;
2) adopt the notch type shaking table that desulfurization slag is carried out gravity treatment and be ground to granularity≤0.074 millimeter;
3) carry out magnetic separation, tell concentrate and mine tailing, controlling magnetic field intensity is at 80～140kA/m, and in the control concentrate: the TFe weight percent is 75%～90%, and the weight percent of S is 0.10%～0.25%, and the TFe weight percent is 8～18% in the mine tailing;
4) above-mentioned desulfurization slag concentrate is carried out desulfurization: insert in the desulfurization container desulfurization slag concentrate and heat fused; The desulfurization slag concentrate is all skimmed after the fusing, adds the calcification sweetening agent according to 10～15kg/ ton desulfurization slag concentrate then in the desulfurization container and stirs, and the weight percent of S is≤0.03% in the molten iron of control after desulfurization;
The component of described calcification sweetening agent and weight percent are: CaO:79%～86%, CaF
2: 10%～20%, aluminium powder: 1～5%;
5) batching and smelt is 60%～85% desulfurization slag concentrate according to weight percent with the Graphite Powder 99 carburelant mixing of 14%～35% the pig iron or steel scrap and 1～5% and smelt into molten iron;
6) breed method in the employing bag and carry out inoculation: nucleating agent is selected ferrosilicon nucleating agent 75SiFe, and stirs evenly according to 0.2%～0.5% adding of molten iron gross weight;
7) adopt and cover the bag method and carry out spheroidizing: nodulizing agent is selected the QRMg6RE2 nodulizing agent, and stirs evenly according to 0.5%～2.5% adding of molten iron gross weight;
8) cast: the molten iron after the nodularization is poured into moulding in the mold, and its foundry goods is processed as requested.
It is characterized in that: batching is according to the pig iron of 70%～80% desulfurization slag concentrate and 19%～28% or the Graphite Powder 99 carburelant mixing of steel scrap and 1～2%.
It is characterized in that: described desulfurization container is carbon tube furnace or medium-frequency induction furnace.
It is characterized in that: when the desulfurization slag concentrate is carried out desulfurization, add aluminium powder according to 1～10kg/ ton desulfurization slag.
Characteristics of the present invention:
1), produced the satisfied fully cast iron of producing auto-parts, thereby improved the added value of desulfurization slag by comprehensive utilization to desulfurization slag;
2) operating procedure is simple, and is workable;
3) the minimizing desulfurization slag is stored up the pollution to environment, improves environmental quality, increases economic benefit.
Description of drawings
The graphitic cast iron metallographic structure figure of Fig. 1 for adopting the present invention to smelt
The spheroidal graphite cast iron metallographic structure figure of Fig. 2 for adopting the present invention to smelt.
Embodiment
Below the present invention is described further:
Embodiment 1
The component of the desulfurization slag that is adopted and weight percent are: SiO
2: 3.57%, Al
2O
3: 0.46%, CaO:21.74%, MgO:3.69%, TFe:40.18%, S:1.01%, MnO:0.195%, C:2.15%, all the other are unavoidable impurities.
A kind of desulfurization slag of utilizing is produced auto parts machinery method cylinder iron, its step:
1) to main ingredient and weight percent is: SiO
2: 3.57%, Al
2O
3: 0.46%, CaO:21.74%, MgO:3.69%, TFe:40.18%, S:1.01%, MnO:0.195%, the desulfurization slag of C:2.15% is ground and is sieved, and granularity is controlled at below 0.5 millimeter and gets final product;
2) adopt the notch type shaking table that above-mentioned desulfurization slag is carried out gravity treatment and be ground to granularity≤0.074 millimeter;
3) carry out magnetic separation, tell concentrate and mine tailing, controlling magnetic field intensity is at 80～85kA/m, and in the control concentrate: the TFe weight percent is 75%, and the weight percent of S is 0.10%, and the TFe weight percent is 8% in the mine tailing;
4) above-mentioned desulfurization slag concentrate is carried out desulfurization: insert in the carbon tube furnace desulfurization slag concentrate and heat fused; The desulfurization slag concentrate is all skimmed after the fusing, adds the calcification sweetening agent according to 10kg/ ton desulfurization slag concentrate then in carbon tube furnace and stirs, and the weight percent of S is 0.03% in the molten iron of control after desulfurization;
The component of described calcification sweetening agent and weight percent are: CaO:79%, CaF
2: 20%, aluminium powder: 1%;
5) batching and smelt is 60% desulfurization slag concentrate according to weight percent with the Graphite Powder 99 carburelant mixing of 35% the pig iron and 5% and smelt into molten iron;
6) breed method in the employing bag and carry out inoculation: nucleating agent is selected ferrosilicon nucleating agent 75SiFe, and stirs evenly according to 0.2% adding of molten iron gross weight;
7) adopt and cover the bag method and carry out spheroidizing: nodulizing agent is selected the QRMg6RE2 nodulizing agent, and stirs evenly according to 0.5% adding of molten iron gross weight;
8) cast: the molten iron after the nodularization is poured into moulding in the mold, and its foundry goods is processed as requested.
Embodiment 2
The component of the desulfurization slag that is adopted and weight percent are: SiO
2: 3.42%, Al
2O
3: 0.52%, CaO:18.56%, MgO:3.28%, TFe:45.16%, S:1.25%, MnO:0.17%, C:2.04%, all the other are unavoidable impurities.
A kind of desulfurization slag of utilizing is produced auto parts machinery method cylinder iron, its step:
1) to main ingredient and weight percent is: SiO
2: 3.42%, Al
2O
3: 0.52%, CaO:18.56%, MgO:3.28%, TFe:45.16%, S:1.25%, MnO:0.17%, C:2.04%, all the other grind and sieve for the desulfurization slag of unavoidable impurities, and granularity is controlled at below 0.5 millimeter and gets final product;
2) adopt the notch type shaking table that above-mentioned desulfurization slag is carried out gravity treatment and be ground to granularity≤0.074 millimeter;
3) carry out magnetic separation, tell concentrate and mine tailing, controlling magnetic field intensity is at 100～105kA/m, and in the control concentrate: the TFe weight percent is 83%, and the weight percent of S is 0.18%, and the TFe weight percent is 13% in the mine tailing;
4) above-mentioned desulfurization slag concentrate is carried out desulfurization: insert in the carbon tube furnace desulfurization slag concentrate and heat fused; The desulfurization slag concentrate is all skimmed after the fusing, adds the calcification sweetening agent according to 12kg/ ton desulfurization slag concentrate then in carbon tube furnace and stirs, and the weight percent of S is 0.025% in the molten iron of control after desulfurization;
The component of described calcification sweetening agent and weight percent are: CaO:82%, CaF
2: 16%, aluminium powder: 2%;
5) batching and smelt is 73% desulfurization slag concentrate according to weight percent with the Graphite Powder 99 carburelant mixing of 24% the pig iron and 3% and smelt into molten iron;
6) breed method in the employing bag and carry out inoculation: nucleating agent is selected ferrosilicon nucleating agent 75SiFe, and stirs evenly according to 0.35% adding of molten iron gross weight;
7) adopt and cover the bag method and carry out spheroidizing: nodulizing agent is selected the QRMg6RE2 nodulizing agent, and stirs evenly according to 1.5% adding of molten iron gross weight;
8) cast: the molten iron after the nodularization is poured into moulding in the mold, and its foundry goods is processed as requested.
Embodiment 3
The component of the desulfurization slag that is adopted and weight percent are: SiO
2: 3.21%, Al
2O
3: 0.38%, CaO:23.42%, MgO:3.21%, TFe:38.68%, S:1.12%, MnO:0.17%, C:2.12%, all the other are unavoidable impurities.
A kind of desulfurization slag of utilizing is produced auto parts machinery method cylinder iron, its step:
1) to main ingredient and weight percent is: SiO
2: 3.21%, Al
2O
3: 0.38%, CaO:23.42%, MgO:3.21%, TFe:38.68%, S:1.12%, MnO:0.17%, C:2.12%, all the other grind and sieve for the desulfurization slag of unavoidable impurities, and granularity is controlled at below 0.5 millimeter and gets final product;
2) adopt the notch type shaking table that above-mentioned desulfurization slag is carried out gravity treatment and be ground to granularity≤0.074 millimeter;
3) carry out magnetic separation, tell concentrate and mine tailing, controlling magnetic field intensity is at 135～140kA/m, and in the control concentrate: the TFe weight percent is 90%, and the weight percent of S is 0.25%, and the TFe weight percent is 18% in the mine tailing;
4) above-mentioned desulfurization slag concentrate is carried out desulfurization: insert in the medium-frequency induction furnace desulfurization slag concentrate and heat fused; The desulfurization slag concentrate is all skimmed after the fusing, adds the calcification sweetening agent according to 15kg/ ton desulfurization slag concentrate then in carbon tube furnace and stirs, and the weight percent of S is 0.023% in the molten iron of control after desulfurization;
The component of described calcification sweetening agent and weight percent are: CaO:86%, CaF
2: 13%, aluminium powder: 1%;
5) batching and smelt is 85% desulfurization slag concentrate according to weight percent with the Graphite Powder 99 carburelant mixing of 14% the pig iron and 1% and smelt into molten iron;
6) breed method in the employing bag and carry out inoculation: nucleating agent is selected ferrosilicon nucleating agent 75SiFe, and stirs evenly according to 0.5% adding of molten iron gross weight;
7) adopt and cover the bag method and carry out spheroidizing: nodulizing agent is selected the QRMg6RE2 nodulizing agent, and stirs evenly according to 2.5% adding of molten iron gross weight;
8) cast: the molten iron after the nodularization is poured into moulding in the mold, and its foundry goods is processed as requested.
Embodiment 4
The component of the desulfurization slag that is adopted and weight percent are: SiO
2: 3.65%, Al
2O
3: 0.54%, CaO:20.64%, MgO:3.73%, TFe:41.35%, S:1.21%, MnO:0.21, C:2.16%, all the other are unavoidable impurities.
A kind of desulfurization slag of utilizing is produced auto parts machinery method cylinder iron, its step:
1) to main ingredient and weight percent is: SiO
2: 3.65%, Al
2O
3: 0.54%, CaO:20.64%, MgO:3.73%, TFe:41.35%, S:1.21%, MnO:0.21, C:2.16%, all the other grind and sieve for the desulfurization slag of unavoidable impurities, and granularity is controlled at below 0.5 millimeter and gets final product;
2) adopt the notch type shaking table that above-mentioned desulfurization slag is carried out gravity treatment and be ground to granularity≤0.074 millimeter;
3) carry out magnetic separation, tell concentrate and mine tailing, controlling magnetic field intensity is at 115～120kA/m, and in the control concentrate: the TFe weight percent is 86%, and the weight percent of S is 0.20%, and the TFe weight percent is 10% in the mine tailing;
4) above-mentioned desulfurization slag concentrate is carried out desulfurization: insert in the medium-frequency induction furnace desulfurization slag concentrate and heat fused; The desulfurization slag concentrate is all skimmed after the fusing, in medium-frequency induction furnace, add the calcification sweetening agent then according to 12kg/ ton desulfurization slag concentrate, add aluminium powder and stir according to 8kg/ ton desulfurization slag concentrate, the weight percent of S is 0.022% in the molten iron of control after desulfurization;
The component of described calcification sweetening agent and weight percent are: CaO:85%, CaF
2: 10%, aluminium powder: 5%;
5) batching and smelt is 80% desulfurization slag concentrate according to weight percent with the Graphite Powder 99 carburelant mixing of 19% the pig iron and 1% and smelt into molten iron;
6) breed method in the employing bag and carry out inoculation: nucleating agent is selected ferrosilicon nucleating agent 75SiFe, and stirs evenly according to 0.4% adding of molten iron gross weight;
7) adopt and cover the bag method and carry out spheroidizing: nodulizing agent is selected the QRMg6RE2 nodulizing agent, and stirs evenly according to 2.0% adding of molten iron gross weight;
8) cast: the molten iron after the nodularization is poured into moulding in the mold, and its foundry goods is processed as requested.
Table 1 is each embodiment analysis of chemical elements the results list after treatment;
Table 2 is the automobile component tension test test result tabulation that each embodiment pilot scale is made;
Table 3 is each embodiment pilot scale automobile component product pliability test test result tabulation;
Table 4 is each embodiment pilot scale automobile component product compression testing test result tabulation;
Table 5 is each embodiment pilot scale automobile component product shock test test result tabulation;
Table 6 is each embodiment pilot scale automobile component product hardness experimental test the results list.
Analysis of chemical elements result (weight percent) % of each embodiment of table 1 desulfurization slag after treatment
Each embodiment pilot scale automobile component tension test test result of table 2
Each embodiment pilot scale automobile component product pliability test test result of table 3
Each embodiment pilot scale automobile component product compression testing test result of table 4
Each embodiment pilot scale automobile component product shock test test result of table 5
Each embodiment pilot scale automobile component product hardness experimental test result of table 6
Claims (4)
1. one kind is utilized desulfurization slag to produce auto parts machinery method cylinder iron, its step:
1) desulfurization slag to be ground and sieved, granularity is controlled at≤and 0.5 millimeter;
2) adopt the notch type shaking table that desulfurization slag is carried out gravity treatment and be ground to granularity≤0.074 millimeter;
3) carry out magnetic separation, tell concentrate and mine tailing, controlling magnetic field intensity is at 80～140kA/m, and in the control concentrate: the TFe weight percent is 75%～90%, and the weight percent of S is 0.10%～0.25%, and the TFe weight percent is 8～18% in the mine tailing;
4) above-mentioned desulfurization slag concentrate is carried out desulfurization: insert in the desulfurization container desulfurization slag concentrate and heat fused; The desulfurization slag concentrate is all skimmed after the fusing, adds the calcification sweetening agent according to 10～15kg/ ton desulfurization slag concentrate then in the desulfurization container and stirs, and the weight percent of S is≤0.03% in the molten iron of control after desulfurization;
The component of described calcification sweetening agent and weight percent are: CaO:79%～86%, CaF2:10%～20%, aluminium powder: 1～5%;
5) batching and smelt is 60%～85% desulfurization slag concentrate according to weight percent with the Graphite Powder 99 carburelant mixing of 14%～35% the pig iron or steel scrap and 1～5% and smelt into molten iron;
6) breed method in the employing bag and carry out inoculation: nucleating agent is selected ferrosilicon nucleating agent 75SiFe, and stirs evenly according to 0.2%～0.5% adding of molten iron gross weight;
7) adopt and cover the bag method and carry out spheroidizing: nodulizing agent is selected the QRMg6RE2 nodulizing agent, and stirs evenly according to 0.5%～2.5% adding of molten iron gross weight;
8) cast: the molten iron after the nodularization is poured into moulding in the mold, and its foundry goods is processed as requested.
2. a kind of desulfurization slag of utilizing as claimed in claim 1 is produced auto parts machinery method cylinder iron, it is characterized in that: batching is according to the pig iron of 70%～80% desulfurization slag concentrate and 19%～28% or the Graphite Powder 99 carburelant mixing of steel scrap and 1～2%.
3. a kind of desulfurization slag of utilizing as claimed in claim 1 is produced auto parts machinery method cylinder iron, and it is characterized in that: described desulfurization container is carbon tube furnace or medium-frequency induction furnace.
4. a kind of desulfurization slag of utilizing as claimed in claim 1 is produced auto parts machinery method cylinder iron, it is characterized in that: when the desulfurization slag concentrate is carried out desulfurization, add aluminium powder according to 1～10kg/ ton desulfurization slag.
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| CN2011102264443A CN102296140A (en) | 2011-08-09 | 2011-08-09 | Method of producing cast iron for auto parts with desulfuration residues |
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|---|---|---|---|
| CN2011102264443A CN102296140A (en) | 2011-08-09 | 2011-08-09 | Method of producing cast iron for auto parts with desulfuration residues |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634625A (en) * | 2012-05-07 | 2012-08-15 | 武汉冶金渣环保工程有限责任公司 | Method for producing ductile cast iron by utilizing desulfurized slags |
| CN103981304A (en) * | 2014-05-30 | 2014-08-13 | 苏州大学 | Regeneration method for molten iron desulphurization slag |
| CN104451359A (en) * | 2014-11-26 | 2015-03-25 | 山东省源通机械股份有限公司 | Ultralow-temperature high-toughness special nodular cast iron metal material and preparation method thereof |
| CN106862498A (en) * | 2017-03-03 | 2017-06-20 | 马鞍山市兴隆铸造有限公司 | A kind of high intensity anchor plate preparation technology |
| CN111451444A (en) * | 2020-05-21 | 2020-07-28 | 宜宾普什联动科技有限公司 | Casting method of high-horsepower engine box body casting |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634625A (en) * | 2012-05-07 | 2012-08-15 | 武汉冶金渣环保工程有限责任公司 | Method for producing ductile cast iron by utilizing desulfurized slags |
| CN103981304A (en) * | 2014-05-30 | 2014-08-13 | 苏州大学 | Regeneration method for molten iron desulphurization slag |
| CN104451359A (en) * | 2014-11-26 | 2015-03-25 | 山东省源通机械股份有限公司 | Ultralow-temperature high-toughness special nodular cast iron metal material and preparation method thereof |
| CN106862498A (en) * | 2017-03-03 | 2017-06-20 | 马鞍山市兴隆铸造有限公司 | A kind of high intensity anchor plate preparation technology |
| CN111451444A (en) * | 2020-05-21 | 2020-07-28 | 宜宾普什联动科技有限公司 | Casting method of high-horsepower engine box body casting |
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Application publication date: 20111228 |