CN105695735A - Self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust - Google Patents
Self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust Download PDFInfo
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- CN105695735A CN105695735A CN201610119952.4A CN201610119952A CN105695735A CN 105695735 A CN105695735 A CN 105695735A CN 201610119952 A CN201610119952 A CN 201610119952A CN 105695735 A CN105695735 A CN 105695735A
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- slag
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 62
- 239000010959 steel Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000000428 dust Substances 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 30
- 238000005096 rolling process Methods 0.000 title claims abstract description 29
- 239000010802 sludge Substances 0.000 title claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 81
- 238000005453 pelletization Methods 0.000 claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 235000019738 Limestone Nutrition 0.000 claims abstract description 10
- 239000006028 limestone Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 57
- 229910052742 iron Inorganic materials 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 239000008188 pellet Substances 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 16
- 239000003921 oil Substances 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 10
- 239000002910 solid waste Substances 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000011701 zinc Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 229940067573 brown iron oxide Drugs 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010731 rolling oil Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000004531 microgranule Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust. Limestone powder with the grain size smaller than 2mm is purchased and conveyed to a pelletizing production line for use, and an opposite-roll cold pressing pelletizing machine production line is adopted by the pelletizing production line; meanwhile, the steel rolling oily sludge and blast furnace gas dust are conveyed to the pelletizing production line for use; the limestone powder, the blast furnace gas dust and the steel rolling oily sludge are added into an ordinary vertical mixer to be stirred and mixed uniformly according to mass percentages of 10:75:15; after a mixture obtained in the previous step is mixed uniformly, the mixture is compacted into pellets with the diameters of 30-50 mm on an opposite-roll cold pressing pelletizing machine, and then the pellets are conveyed to a converter production line for use; during a converter deslagging process, the pellets are added into a slag tank along with steel slags, or the pellets are added into the slag tank containing molten steel slags from the top, and the mass ratio of the added pellets to the steel slags is 1:10; and after the pellets are added, the slag tank stands for 60+/-20 min, and then the steel slags can be processed according to a normal slag hot disintegration process.
Description
Technical field
The present invention relates to the autoreduction of a kind of steel rolling oily sludge and blast furnace dust and utilize technique, utilize steel rolling oil-containing greasy filth to produce the self-reductivity pelletizing of synthesis with blast furnace dust, join in the slag ladle containing converter liquid steel slag, utilize the waste heat of slag to carry out upgrading。
Background technology
Oily sludge is the inevitable outcome of steel rolling processing procedure, and its volume accounts for and processes the 0.3%～1% of sewage volume, and the handling of mud accounts for the 8%～25% of whole water handling。Along with the raising of enterprises' production capacity, water consumption increases, and the discharge capacity of mud also increases accordingly。The feature of oily sludge be moisture content compared with high, volume big, be easily generated stench, because containing brown iron oxide grain, proportion is bigger, and be in granular form, hardness is high, abrasion is big, oil content up to 10%～20%, viscosity is high, be easily formed " greasy filth group ", is a kind of iron and steel enterprise iron content solid waste of being difficult to process。
Blast furnace gas mud is the raw material dust and high-temperature region intense reaction that carry out in blast furnace ironmaking process along with blast furnace gas and the product that obtains through wet dust removal of the microgranule that produces。Blast furnace gas mud is as the side-product of steel and iron industry, and its main component is oxide and the carbon of ferrum, and namely from the Iron Ore Powder of furnace roof blowout and coke powder, full ferrum iron content is probably about 30%, and carbon content is about 20%。Simultaneously because containing a certain amount of non-ferrous metal in the iron ore of part blast furnace use, some lower boiling non-ferrous metals enter blast furnace gas after volatilizing in blast furnace, are finally enriched with in gas mud in the form of the oxide。There is presently no a kind of effective low cost process method and can effectively process blast furnace dust。
By consulting literatures: (1) Ji Zhenxing have in the middle of 2005 " Second China National metallurgy water saving, sewage disposal technology seminar " upper paper being entitled as " research of steel rolling oil-containing turbid circulating water comprehensive treatment technique " announced " concentration of hydraulic mixture 40% of certain steel rolling mill; oil content is up to 11～13; by being pumped into three-phase decanter machine dehydration; continuous feed; solid, oily, water three-phase is continuously separated; aqueous phase contains only the oil of 0.05%～0.1% and the solid matter of 0.3%～0.4% after dehydration, sedimentation tank can be sent into and return turbid circulating water system。In oil phase, oil content reaches 97%, recycles。The moisture content of mud cake is only 14%～16% and minimal amount of oil (～3.0%) mainly brown iron oxide, recycles as high-grade Iron concentrate。" content statement；(2) Liao Hongqiang, Qian Kai, Zhao Minge et al. 2006 " Second China National Baosteel Annual Conference " upper announce be entitled as in " Shoudu Iron and Steel Co develop a circular economy engineering practice and strategic thinking " literary composition and have " the steel rolling oil-sludge treatment technology of Shoudu Iron and Steel Co independent development; the processing of steel rolling greasy filth solid waste is separated into moisture, oil point and three kinds of products of brown iron oxide, and realizes its harmless treatment and recycling。" content statement。(3) there is the content statement of " after (blast furnace dust etc.) solid waste makes consumption increase; Metallurgical Properties of Sinter worsens serious; and then have influence on blast furnace; blast furnace shows as overall permeability of stock column and is deteriorated, and full blast level reduces " in the middle of paper being entitled as " Shoudu Iron and Steel Co moves steel blast furnace sinter with addition of solid waste practice summary " that Wang Weiping, Zhang Haibin announce in the middle of " the 13rd the big blast furnace ironmaking Annual Conference collection of thesis in the whole nation "。(4) Xu Haichuan, have in the middle of all and quick et al. papers being entitled as " through engineering approaches and production practices thereof that rotary hearth furnace processes steel mill's solid waste technique " delivered on " iron and steel " magazine of the third phase in 2012 " steel mill's zinc-containing dust due in blast furnace iron-making process cannot efficient recovery, cause the huge wasting of resources and environmental pollution。The U.S. and Japan and other countries adopt rotary hearth furnace process to process the iron dust containing of steel mill's solid waste especially zincy lead, have proven to successful technique at present。" content statement。
Known according to above content statement: (1) processes the main technique of steel rolling greasy filth at present is adopt plant equipment to carry out dehydration deoiling treatment。But do not state the Land use systems of follow-up greasy filth。(2) the current maximally effective technique of blast furnace dust is to adopt rotary hearth furnace process to process, but the investment of the technological equipment of rotary hearth furnace is higher, processes this type of zinc-containing dust of blast furnace dust relatively costly。
Summary of the invention
It is an object of the invention to provide the autoreduction of a kind of steel rolling oily sludge and blast furnace dust and utilize technique, it is possible to the oil price in gas ash and steel rolling greasy filth is worth maximized utilization, reclaim harmful element, no longer environment is worked the mischief。
The object of the present invention is achieved like this: the autoreduction of a kind of steel rolling oily sludge and blast furnace dust utilizes technique, and the buying granularity limestone powder roping less than 2mm is stand-by to pelletizing production line, and pelletizing production line adopts pair rolls cold pressing ball machine production line；Simultaneously by stand-by to pelletizing production line to steel rolling greasy filth and blast furnace dust roping；Limestone powder, blast furnace dust and steel rolling greasy filth, add common vertical mixer according to the ratio that mass percent is 10:75:15 of three and be stirred mixing；After stirring, it being pressed on pair rolls cold pressing ball machine the pelletizing that diameter is 30～50mm, roping is stand-by to converter lines；In converter tapping process, described pelletizing is added together along with slag slag ladle, or to equipped with adding described pelletizing in the slag ladle of liquid steel slag from top, the pelletizing of addition and the mass ratio of slag are 1:10；After pelletizing adds, slag ladle stands 60 ± 20min, and then slag carries out processing according to normal hot vexed slag technique；After the vexed Slag treatment of heat, slag carries out the iron-bearing material after selecting ferrum can directly for pelletizing plant, sintering plant, and tailings recommends construction of road and bridge field or cement industry uses。
Present invention process is to utilize steel rolling oily sludge and blast furnace dust both solid wastes, adding portion functional material, synthetically produced self-reductivity pelletizing, join in the slag ladle equipped with liquid converter oxidisability slag, the high temperature utilizing slag and the more feature of the oxide contained, make the two react, then slag adopts hot vexed slag technique to process, slag after process is through magnetic separation, reclaim iron-bearing material therein, it is applied to ironmaking or steel-making, tailings is applied to repair the roads or manufacture of cement, realize the reasonable recovery of gas ash and the valuable element in greasy filth, tailings can be innoxious and be used。Wherein the composition of certain factory's liquid converter oxidizing slag is shown in following table:
The know-why of the present invention is based on following fundamental cause and mechanism:
(1) blast furnace dust is powder waste, pulverous gas ash is difficult to join in the middle of the slag ladle containing converter liquid steel slag, by its pelletizing or agglomeration, join in converter slag ladle, C in the middle of gas ash is the non-conductor of heat, affect the reaction of gas ash and slag and the subsequent treatment of slag。
(2) oil in steel rolling greasy filth is also the non-conductor of a kind of heat, greasy filth is joined in converter liquid steel slag, or joining in converter liquid steel slag after pelletizing, the greasy filth of steel rolling all can not participate in reaction, the subsequent treatment of this utilization affecting steel rolling greasy filth equally and slag at short notice。
(3) temperature of converter liquid oxidatively slag is at 1400～1750 DEG C, the heat of converter oxidizing slag, the oil in the carbon contained in the middle of blast furnace dust and steel rolling greasy filth is passed in heat, they all can react by the ferrum oxide middle with gas ash and greasy filth, it also is able to react with the ferrum oxide of converter oxidizing slag centre, manganese oxide, generate physics ferrum, be deposited on tank bottoms and be recycled。Wherein carbon is shown in following table with the reaction condition of ferrum oxide:
(4) oxide of alkali metal oxide in the middle of gas ash and zinc, the condition that itself and carbon react is shown in following table:
(5) result of study that what By consulting literatures (5) Zhou Guangyu published between the 8th (2011) China Steel nd Annual Meeting is concentrated be entitled as " metallurgical breeze and the research of ion dust mud contaning pellet binder " announces shows, oil is also a kind of binding agent。Oil in steel rolling greasy filth is a kind of acidulous material, is also the binder material of a kind of iron content pelletizing。
Inventor is according to above process characteristic, use steel rolling greasy filth as binding agent, bonding limestone powder and blast furnace dust, ball press is suppressed into the pelletizing of 30～50mm, while liquid steel slag is poured out in converter, join in slag ladle, can also to equipped with in the slag ladle of liquid steel slag, pelletizing is added from slag ladle top, after adding pelletizing, limestone in pelletizing first decomposes, pelletizing fragmentation is promoted to become little granule one by one, directly react with liquid steel slag, can also react with little intragranular ferrum oxide, avoid pelletizing because of carbon containing, heat is caused quickly to transmit, promote that pelletizing participates in the short slab of reaction。Reaction equation and the principle of the present invention are as follows:
CaCO3+QHeat→CaO+CO2↑ (1)
2Fe2O3(s)+3C (s)+QHeat=4Fe(s)+3CO2(g) (2)
FeO+Fe2O3+CnHmOr+QHeat→Fe(s)+CO2(g)↑+H2O(g)↑(3)
FeO+C→Fe+CO2(g)↑ (4)
MnO+C→Mn+CO2(g)↑ (5)
2ZnO(s)+C(S)=2Zn(g)+CO2(g)↑ (6)
The gas CO of generation is decomposed after reaction (1) decomposes21. effusion, play: promote pelletizing fragmentation to become little granule, quickly participate in reduction reaction；2.: CO2, in the process of effusion, stirs liquid steel slag, adds the contact area of the little granule of pelletizing and liquid steel slag, improve response speed；3.: owing to this reaction is the endothermic reaction, it is possible to effectively reduce the temperature of converter liquid steel slag, be conducive to the vexed residues processing technique of heat of slag。
Reaction (2) produces autoreduction for the ferrum oxide that the carbon in the middle of gas ash and gas ash are middle and reacts, and the same gas produced contributes to expanding reaction interface。
Reaction (3) is reacted for the autoreduction occurred with the ferrum oxide in greasy filth after the oil-breaking in the middle of greasy filth。
The carbon that reaction (4) (5) decomposites for gas ash and greasy filth reacts with the ferrum oxide of slag centre, manganese oxide, the favourable potential value that make use of carbon, contributes to reclaiming the ferrum element in the middle of slag。
Reaction (6) is the autoreduction the occurred reaction of the ZnO in the middle of gas ash, but adopt this technique, after pelletizing fragmentation, ferrum oxide and manganese oxide that carbonaceous material is maximum with slag component intermediate amounts react, and reduce the probability of the ZnO autoreduction occurred reaction, and most zinc oxide has been stayed inside slag, oxidation by air again after the Zn gasification being reduced on a small quantity, entering inside the dedusting ash of hot vexed slag, the raw material being taken as cement is used, or proposes zinc process after enrichment。
60 ± 20min after pelletizing adds liquid steel slag, slag processes according to normal hot vexed slag technique, and after process, magnetic separation ferrum element therein is used for making steel or smelting iron, and tailings is applied to cement industry or highway industry, is used。
Beneficial effects of the present invention: through the PROCESS FOR TREATMENT of the present invention, in steel rolling greasy filth, the carbon of most oil and gas ash centre is taken as reducing agent use, become metallic iron, it is deposited in bottom slag ladle, achieve the value maximization of valuable element in both solid wastes, and do not affect follow-up normal process and the utilization of slag。The present invention utilizes the slag processing equipment of iron and steel enterprise, does not increase any investment and all can realize, and cost is low, it does not have the risk of contaminated environment。
Detailed description of the invention
The autoreduction of a kind of steel rolling oily sludge and blast furnace dust utilizes technique, and for certain factory's vexed slag technique of heat, step is as follows:
1, pelletizing production line adopts pair rolls cold pressing ball machine production line；The buying granularity limestone powder roping less than 2mm is stand-by to pelletizing production line；Simultaneously by stand-by to pelletizing production line to steel rolling greasy filth and blast furnace dust roping；2, limestone powder, blast furnace dust and greasy filth, add common vertical mixer according to the ratio that mass percent is 10:75:15 of three and be stirred mixing；After stirring, it being suppressed on pair roller ball press the pelletizing of 30～50mm, roping is stand-by to converter lines；3, in converter tapping process, adding slag ladle together along with slag, or to equipped with adding pelletizing in the slag ladle of liquid steel slag from top, the ratio of pelletizing additional proportion and slag is 1:10；4, after pelletizing adds, slag ladle stands 60 ± 20min, and then slag carries out processing according to normal hot vexed slag technique；5, after hot vexed Slag treatment, slag carries out the iron-bearing material after selecting ferrum can directly for pelletizing plant, sintering plant, and tailings recommends construction of road and bridge field or cement industry uses。
Claims (1)
1. the autoreduction of a steel rolling oily sludge and blast furnace dust utilizes technique, it is characterised in that comprise the following steps: 1, the buying granularity limestone powder roping less than 2mm stand-by to pelletizing production line, pelletizing production line employing pair rolls cold pressing ball machine production line；Simultaneously by stand-by to pelletizing production line to steel rolling greasy filth and blast furnace dust roping；2, limestone powder, blast furnace dust and steel rolling greasy filth, add common vertical mixer according to the ratio that mass percent is 10:75:15 of three and be stirred mixing；After stirring, it being pressed on pair rolls cold pressing ball machine the pelletizing that diameter is 30～50mm, roping is stand-by to converter lines；3, in converter tapping process, described pelletizing is added together along with slag slag ladle, or to equipped with adding described pelletizing in the slag ladle of liquid steel slag from top, the pelletizing of addition and the mass ratio of slag are 1:10；4, after pelletizing adds, slag ladle stands 60 ± 20min, and then slag carries out processing according to normal hot vexed slag technique；5, after hot vexed Slag treatment, slag carries out the iron-bearing material after selecting ferrum can directly for pelletizing plant, sintering plant, and tailings recommends construction of road and bridge field or cement industry uses。
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| CN2015108331187 | 2015-11-26 | ||
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| CN107641711A (en) * | 2017-11-20 | 2018-01-30 | 宝钢集团新疆八钢铁有限公司 | Utilize steel rolling oily sludge and the method for blast furnace dust production revolving furnace slag pressing agent |
| CN107699686A (en) * | 2017-09-08 | 2018-02-16 | 宝钢集团新疆八钢铁有限公司 | A kind of method that iron and steel enterprise's waste minerals oil is digested using process for making |
| CN109385321A (en) * | 2018-12-07 | 2019-02-26 | 马钢集团设计研究院有限责任公司 | A kind of waste emulsified mixture oil-sludge treatment method |
| CN110029232A (en) * | 2019-04-30 | 2019-07-19 | 云南驰宏锌锗股份有限公司 | A kind of method of low-grade lead Zinc oxide resource utilization |
| CN110029234A (en) * | 2019-05-31 | 2019-07-19 | 衢州市业胜金属材料有限公司 | A method of zinc oxide is prepared using blast furnace dust |
| CN110293112A (en) * | 2019-06-12 | 2019-10-01 | 山东钢铁股份有限公司 | The reuse method of special steel dedusting ash and steel rolling greasy filth |
| CN112342375A (en) * | 2020-10-28 | 2021-02-09 | 湖南华菱湘潭钢铁有限公司 | Method for recovering iron in metallurgical dust and mud |
| CN112746139A (en) * | 2021-01-01 | 2021-05-04 | 新疆互力佳源环保科技有限公司 | Method for cooperatively treating waste lead-acid storage battery by using liquid steel slag |
| CN112941311A (en) * | 2021-01-29 | 2021-06-11 | 武汉科技大学 | Preparation method of composite cold-pressed pellets for converter steelmaking |
| CN112961959A (en) * | 2021-02-01 | 2021-06-15 | 武汉钢铁有限公司 | Oil-containing iron-containing dust mud and hot-state casting residue cooperative production and utilization method |
| CN114807462A (en) * | 2022-03-29 | 2022-07-29 | 马鞍山钢铁股份有限公司 | Method for hot-rolling oil sludge through hot-disintegration treatment of steel slag |
| CN115505745A (en) * | 2022-10-29 | 2022-12-23 | 新源县渣宝环保技术有限公司 | Method for treating fly ash in sintering process by using steel slag thermal coupling technology |
| CN115612836A (en) * | 2022-11-04 | 2023-01-17 | 江苏长强钢铁有限公司 | A method for reducing OG slime using converter slag |
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