CN107699686B - Method for digesting waste mineral oil of iron and steel enterprises by using steelmaking process - Google Patents
Method for digesting waste mineral oil of iron and steel enterprises by using steelmaking process Download PDFInfo
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- CN107699686B CN107699686B CN201710807234.0A CN201710807234A CN107699686B CN 107699686 B CN107699686 B CN 107699686B CN 201710807234 A CN201710807234 A CN 201710807234A CN 107699686 B CN107699686 B CN 107699686B
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- converter
- mineral oil
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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
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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
-
- 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
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a method for digesting waste mineral oil of a steel enterprise by utilizing a steelmaking process, which comprises the following steps of 1, pulling secondary fly ash of a converter to a pelletizing production line for standby; 2. drawing the waste mineral oil grease to a pelletizing production line for later use; 3. transporting the iron scale generated by the converter continuous casting machine system to a pelletizing production line for standby; 4. uniformly adding the waste mineral oil and fat into the fly ash, uniformly stirring, then adding the iron scale granules, and uniformly stirring, wherein the proportion of the secondary fly ash of the converter, the iron scale granules and the waste mineral oil and fat is controlled according to the mass percentage of 40:54: 6; 5. after the grease and various raw materials are uniformly mixed, conveying the mixed raw materials into a pellet press, and pressing pellets and agglomerating to prepare cold-bonded pellets; 6. and pulling the produced cold-bonded pellet product to a converter production line, and adding the cold-bonded pellet product into a converter for use according to a method of adding molten iron firstly and then adding the cold-bonded pellet product.
Description
Technical Field
The invention relates to a method for digesting waste mineral oil of iron and steel enterprises by utilizing a steelmaking process.
Background
The grease is used in the middle of various process equipment such as mechanical lubrication, hydraulic transmission and the like in the steel industry, mechanical abrasion is caused in the lubrication process, and metal scraps of parts enter the grease. As most of lubricated mechanical parts are special steel, the infiltration of cadmium, nickel, molybdenum, copper, zinc and lead makes grease become a dangerous waste rich in heavy metal elements. On the other hand, as the most common medium for hydraulic transmission, the molecular structure and chemical properties of the grease are changed to different degrees after use, and the change of the properties makes the recycling of the grease a technical barrier which is difficult to deal with in the industry.
Disclosure of Invention
The invention aims to provide a method for digesting the waste mineral oil of a steel enterprise by using a steelmaking process, which can carry out full treatment on the waste mineral oil generated by the steel enterprise, promote the utilization of waste mineral oil resources and realize harmless treatment.
The invention aims to realize the method for digesting the waste mineral oil of the iron and steel enterprises by using the steelmaking process, and the waste mineral oil is treated according to the following steps: 1. drawing the converter secondary dedusting ash to a pelletizing production line for later use; 2. drawing the waste mineral oil grease to a pelletizing production line for later use; 3. transporting the iron scale generated by the converter continuous casting machine system to a pelletizing production line for standby; 4. uniformly adding the waste mineral oil and fat into the fly ash, uniformly stirring, then adding the iron scale granules, and uniformly stirring, wherein the proportion of the secondary fly ash of the converter, the iron scale granules and the waste mineral oil and fat is controlled according to the mass percentage of 40:54: 6; 5. after the grease and various raw materials are uniformly mixed, conveying the mixed raw materials into a pellet press, and pressing pellets and agglomerating to prepare cold-bonded pellets; 6. the produced cold bonded pellet product is pulled to a converter production line and is used as a substitute of scrap steel in converter steelmaking production, the cold bonded pellet product is added into a converter for use according to a method of firstly adding molten iron and then adding cold bonded pellets, and the adding amount of the cold bonded pellets is 3% -10% of the loading amount of the converter.
The invention utilizes the waste mineral oil which is a weakly acidic material and a material with polar characteristics as a binder, uses the secondary dedusting ash of a converter and iron oxide scales generated by a steelmaking continuous casting machine system as a grading ingredient to pelletize and produce cold-bonded pellets, and is used as a substitute of waste steel in converter steelmaking production, wherein the addition amount is 3-10% of the loading amount, and the waste mineral oil can be fully digested.
The technical principle of the invention is based on the following four points: (1) the waste mineral oil is a weakly acidic substance and can react with an alkaline substance to generate grease acid salt, and the grease is a polar substance, so that the waste mineral oil can be used as a binder to bind the alkaline substance for pelletizing. The secondary fly ash of the converter is alkaline substance with calcium oxide, magnesium oxide and iron oxide as main contents, and the waste mineral oil can be used as a binder for pelletizing the secondary fly ash of the converter. Because the pelletizing raw material needs to have a particle material and the produced pellets also need to ensure the content of total iron, the iron oxide scale produced by a continuous casting machine is selected as aggregate to be used, and the cold-bonded pellets with the TFe content of more than 50 percent can be produced. (2) After pelletizing, the cold-bonded pellets are used in a converter as a substitute of scrap steel, and in order to prevent negative effects generated in the steelmaking process by considering the cracking characteristic of grease at 350 ℃, the cold-bonded pellets are smelted in the converter, and after molten iron is added into the converter, the cold-bonded pellets are added, so that explosion accidents in the molten iron adding process are prevented. (3) After the cold-bonded pellets are added into molten iron, firstly, the decomposition and cracking of grease acid salt and grease are carried out, hydrogen is firstly separated out in the process and reacts with iron oxide in the middle of the pellets or oxygen in the middle of furnace gas to release heat energy, the earlier-stage temperature rise of a converter is facilitated, then cracked C reacts with iron oxide or other metal oxides or oxygen in the middle of the furnace gas to generate CO and CO2, and the CO can be recycled as converter gas and applied to TRT power generation or used as fuel, so that the resource utilization of grease molecules in the middle of waste mineral oil is realized. (4) Heavy metal substances contained in the waste mineral oil are reduced by C, H cracked by grease in the interior of the pellets, heavy metal oxides enter molten pool iron liquid to become alloy elements, and the alloy elements existing in a metal form directly enter the molten pool iron liquid to become alloying elements of steel. The process method can realize the reutilization of heavy metal elements in the waste mineral oil and realize harmless treatment.
The invention utilizes the characteristics of grease, uses the grease as a binder, is used for producing self-reducing pellets, is applied to steel making or iron making, and in the process link of steel making and iron making, grease molecules in the grease are cracked and decomposed into carbon and hydrogen to participate in metallurgical reaction of steel making, wherein the carbon is oxidized to generate carbon monoxide, and the carbon monoxide enters a coal gas recovery system of converter steel making to be used as fuel of TRT power generation. The hydrogen is oxidized into vapor and discharged to the atmosphere, heavy metal substances in the grease are reduced and enter the molten steel to be utilized as alloy elements, and the full utilization of the waste mineral oil is realized. The invention has the following application range and application prospect: in the steel industry, a large amount of grease is needed for mechanical lubrication, hydraulic transmission machinery and the like, and after the grease is used for a period of time, some grease is mixed with heterogeneous substances, and other grease is infiltrated into water, acid and other substances to form waste. This waste is commonly referred to collectively as waste mineral oil, and is mostly hazardous waste. The treatment process of the waste is complex, the waste needs to be classified, collected and intensively pulled to a company or a mechanism for specially treating the waste mineral oil for recovery treatment, the treatment cost is high, and no good utilization method exists for residual substances after the waste mineral oil is recycled at present. The invention utilizes the characteristics of grease, uses the grease as a binder, is used for producing self-reducing pellets, is applied to steel making or iron making, and in the process link of steel making and iron making, grease molecules in the grease are cracked and decomposed into carbon and hydrogen to participate in metallurgical reaction of steel making, wherein the carbon is oxidized to generate carbon monoxide, and the carbon monoxide enters a coal gas recovery system of converter steel making to be used as fuel of TRT power generation. The hydrogen is oxidized into steam and discharged to the atmosphere, and heavy metal substances in the grease are reduced to enter the molten steel and are utilized as alloy elements, so that the full utilization of the waste mineral oil is realized, the environment is protected, a large profit space can be created, and the force of technical progress is revealed.
Detailed Description
The process technology of the invention takes a converter production line as an example.
The secondary dust generation amount of one converter accounts for about 3 percent of the steel yield.
Step 1: and (4) pulling the secondary dedusting ash of the converter to a pelletizing production line for later use.
Step 2: drawing the waste mineral oil grease to a pelletizing production line for later use;
and step 3: transporting the iron scale generated by the converter continuous casting machine system to a pelletizing production line for standby;
and 4, step 4: uniformly adding the waste mineral oil and fat into the fly ash, uniformly stirring, then adding the iron scale granules, and uniformly stirring, wherein the proportion of the secondary fly ash of the converter, the iron scale granules and the waste mineral oil and fat is controlled according to the mass percentage of 40:54: 6;
and 5: after the grease and various raw materials are uniformly mixed, conveying the mixed raw materials into a pellet press, and pressing pellets and agglomerating to prepare cold-bonded pellets;
step 6: the produced cold bonded pellet product is pulled to a converter production line and is used as a substitute of scrap steel in converter steelmaking production, the cold bonded pellet product is added into a converter for use according to a method of firstly adding molten iron and then adding cold bonded pellets, and the adding amount of the cold bonded pellets is 3% -10% of the loading amount of the converter.
Claims (1)
1. A method for digesting the waste mineral oil of a steel enterprise by utilizing a steelmaking process is characterized by treating the waste mineral oil according to the following steps: 1. drawing the converter secondary dedusting ash to a pelletizing production line for later use; 2. drawing the waste mineral oil grease to a pelletizing production line for later use; 3. transporting the iron scale generated by the converter continuous casting machine system to a pelletizing production line for standby; 4. uniformly adding the waste mineral oil and fat into the fly ash, uniformly stirring, then adding the iron scale granules, and uniformly stirring, wherein the proportion of the secondary fly ash of the converter, the iron scale granules and the waste mineral oil and fat is controlled according to the mass percentage of 40:54: 6; 5. after the grease and various raw materials are uniformly mixed, conveying the mixed raw materials into a pellet press, and pressing pellets and agglomerating to prepare cold-bonded pellets; 6. the produced cold bonded pellet product is pulled to a converter production line and is used as a substitute of scrap steel in converter steelmaking production, the cold bonded pellet product is added into a converter for use according to a method of firstly adding molten iron and then adding cold bonded pellets, and the adding amount of the cold bonded pellets is 3% -10% of the loading amount of the converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710807234.0A CN107699686B (en) | 2017-09-08 | 2017-09-08 | Method for digesting waste mineral oil of iron and steel enterprises by using steelmaking process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710807234.0A CN107699686B (en) | 2017-09-08 | 2017-09-08 | Method for digesting waste mineral oil of iron and steel enterprises by using steelmaking process |
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| CN107699686A CN107699686A (en) | 2018-02-16 |
| CN107699686B true CN107699686B (en) | 2021-01-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108484124B (en) * | 2018-04-11 | 2022-02-15 | 新疆八一钢铁股份有限公司 | Production method of slag tank slag adhesion preventing agent |
| CN110669921B (en) * | 2019-10-18 | 2023-10-27 | 甘肃酒钢集团宏兴钢铁股份有限公司 | System and method for recycling steelmaking secondary dust removal ash |
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| CN103468939A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Cold press palletizing bonding agent and preparation method thereof |
| CN104073631A (en) * | 2013-03-27 | 2014-10-01 | 鞍钢股份有限公司 | Method for preparing iron-contained waste cold-bonded pellets by using tar residues |
| CN104451139A (en) * | 2014-12-31 | 2015-03-25 | 安徽工业大学 | Technique for making pellet by means of waste plastic and sheet iron containing oil through low-temperature hot pressing |
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| JP2015196896A (en) * | 2014-04-03 | 2015-11-09 | 新日鐵住金株式会社 | Method of regenerating oil-containing waste to useful material |
| CN105695735A (en) * | 2015-11-26 | 2016-06-22 | 新疆八钢铁股份有限公司 | Self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust |
| CN106148686A (en) * | 2015-04-19 | 2016-11-23 | 王虎 | A kind of carbon containing presses down slag cooled agglomerated pellet and Application way thereof |
| CN106435168A (en) * | 2016-11-29 | 2017-02-22 | 江苏省冶金设计院有限公司 | Method for preparing and reducing pellets |
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2017
- 2017-09-08 CN CN201710807234.0A patent/CN107699686B/en active Active
Patent Citations (8)
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| CN104073631A (en) * | 2013-03-27 | 2014-10-01 | 鞍钢股份有限公司 | Method for preparing iron-contained waste cold-bonded pellets by using tar residues |
| CN103468939A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Cold press palletizing bonding agent and preparation method thereof |
| JP2015196896A (en) * | 2014-04-03 | 2015-11-09 | 新日鐵住金株式会社 | Method of regenerating oil-containing waste to useful material |
| CN104451139A (en) * | 2014-12-31 | 2015-03-25 | 安徽工业大学 | Technique for making pellet by means of waste plastic and sheet iron containing oil through low-temperature hot pressing |
| CN106148686A (en) * | 2015-04-19 | 2016-11-23 | 王虎 | A kind of carbon containing presses down slag cooled agglomerated pellet and Application way thereof |
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| CN107699686A (en) | 2018-02-16 |
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Effective date of registration: 20180716 Address after: 830022 No. 1 Bayi Road, Toutun River District, Urumqi, the Xinjiang Uygur Autonomous Region Applicant after: Xinjiang Bayi Iron & Steel Co., Ltd. Address before: 830022 No. 1 Xingang Road, Toutun River District, Urumqi, the Xinjiang Uygur Autonomous Region. Applicant before: Baosteel Group Xinjiang Bayi Iron & Steel Co., Ltd. |
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