CN116174456B - Method for cooperatively treating fly ash in Yili region by utilizing Yili converter slag - Google Patents
Method for cooperatively treating fly ash in Yili region by utilizing Yili converter slag Download PDFInfo
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- CN116174456B CN116174456B CN202310237305.3A CN202310237305A CN116174456B CN 116174456 B CN116174456 B CN 116174456B CN 202310237305 A CN202310237305 A CN 202310237305A CN 116174456 B CN116174456 B CN 116174456B
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- 239000002893 slag Substances 0.000 title claims abstract description 115
- 239000010881 fly ash Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 75
- 239000010959 steel Substances 0.000 claims abstract description 75
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002956 ash Substances 0.000 claims abstract description 23
- 239000008188 pellet Substances 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000004056 waste incineration Methods 0.000 claims abstract description 12
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000009628 steelmaking Methods 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims abstract description 8
- 238000007885 magnetic separation Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000004566 building material Substances 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000010813 municipal solid waste Substances 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 abstract description 14
- 229910001385 heavy metal Inorganic materials 0.000 description 19
- 239000007789 gas Substances 0.000 description 17
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 15
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 9
- 239000000395 magnesium oxide Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 229910052900 illite Inorganic materials 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 7
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011133 lead Substances 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010882 bottom ash Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910003439 heavy metal oxide Inorganic materials 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
Abstract
The invention discloses a method for cooperatively treating fly ash in Yi-plow regions by utilizing Yi-steel converter slag, which comprises the steps of firstly, pulling blast furnace gas ash to a fly ash storage region of a waste incineration plant in Yi-Ning city for later use; the waste tundish coating produced by Yi-plow steel iron limited company is transported to fly ash storage area of Yi-Ning municipal waste incineration plant for standby; uniformly mixing fly ash, blast furnace gas ash and waste tundish coating according to the mass percentage of 75:15:10, and pressing into pellets with the diameter of 30-50mm by adopting a high-pressure dry powder ball pressing machine, wherein the pellets are added into a slag pot along with slag flow when a converter is used for slag discharge, and the addition amount is 50-150kg of ton slag; standing the slag pot for 60-90min, and then treating according to a normal hot slag splashing treatment process; after the steel slag treatment is finished, the granulated iron rich in Fe, cr, cd, ni, cu, pb, zn is recovered in a steel slag magnetic separation production line and is used as a raw material for steelmaking for recycling.
Description
Technical Field
The invention relates to the two technical fields of steel slag thermal coupling (steel slag on-line tempering) technology and harmless treatment of fly ash, in particular to a method for cooperatively treating fly ash in an illite plough zone by utilizing illite steel converter steel slag.
Background
The solid residue after the incineration treatment of the household garbage accounts for 30% -35% of the total amount of the garbage, wherein the bottom ash accounts for 25% -30% and the fly ash accounts for 2% -5%. The waste incineration fly ash refers to the residues of the trapped matters of the flue gas purification system of the waste incineration plant and the sedimentation at the bottoms of the flue and the chimney, contains a certain amount of dioxin, soluble heavy metals and salts, belongs to HW18 dangerous wastes (772-002-18 household waste incineration fly ash) in national hazardous waste directory, and can be safely landfilled after being subjected to harmless treatment in advance. At present, research on recycling of fly ash is found in literature and report. In the journal of environmental impact evaluation in period 4 of 2019, the reference document (1) Luo Renhong discloses a paper entitled "resource utilization profile of household garbage incineration fly ash", wherein the paper has the content expression that the household garbage incineration fly ash is utilized in cement, concrete, ceramic lightweight aggregate and building materials, the fly ash is a novel material, can be considered as a part of base materials for replacing road building materials, but needs to be supported by related policies, and needs to be further researched later; (2) Du Jian in 2017, journal of Henan building materials, 4 th period, discloses a paper entitled "cement curing technology for treatment of waste incineration fly ash", wherein "curing fly ash generated by municipal waste incineration with Portland cement is used, the influence of the fly ash doping amount on curing strength and heavy metal leaching performance is analyzed, and the result shows that the compression strength of a cured body is reduced along with the increase of the fly ash doping amount after the fly ash is cured by Portland cement; along with the reduction of the consumption of silicate cement, heavy metal ions such as Pb, cd and the like are easier to leach out from the solidified body, and the compactness of the cement paste is required to be further improved in order to improve the solidification effect. "content expression; (3) Fan Yanling, zheng Penghui and Zhou Wen in the journal of resource conservation and environmental protection in the 4 th year 2020, the paper entitled "technical review of harmless and recycling treatment of waste incineration fly ash" is published, and there are "the harmless and recycling utilization of waste incineration fly ash in China is still in the starting stage, and many technical difficulties are not overcome, such as the cement solidification capacity increase is large, dioxin substances in a chemical agent stabilization method are not thoroughly destroyed, the heavy metal effect is unstable and the cost is high, the technical effect of hydrothermal treatment is unstable, and the like, but the recycling reuse is not widely applied. "content expression.
As is clear from the above-described publications, there is no process for utilizing fly ash by utilizing converter slag in cooperation with recycling.
Disclosure of Invention
The invention aims to provide a method for cooperatively treating the illite zone fly ash by utilizing the illite steel converter slag, which optimizes the resource utilization performance of the illite steel converter slag, increases the amount of metal elements recovered from the slag and has obvious environmental protection effect while utilizing high-temperature steel slag to harmlessly treat the illite zone fly ash.
The technical scheme adopted by the invention is that the method for cooperatively treating the fly ash in the Yili region by utilizing the Yili converter slag is implemented according to the following steps:
1) Firstly, transporting blast furnace gas ash, wherein the carbon content in the blast furnace gas ash is more than 80%, and the blast furnace gas ash is transported to a fly ash storage area of a garbage incineration plant in Yining city for standby;
2) Waste tundish coating produced by Yi-plow steel iron limited company, wherein the MgO content is more than 60 percent, is pulled and transported to a fly ash storage area of a waste incineration plant in Yi-Ning city for standby;
3) Uniformly mixing fly ash, blast furnace gas ash and waste tundish coating according to the mass percentage ratio of 75:15:10, pressing into pellets with the diameter of 30-50mm by adopting a high-pressure dry powder ball pressing machine, and pulling and transporting to an Italian steel converter slag treatment procedure for standby;
4) When the converter is in slag tapping, adding the pellets into a slag tank along with slag flow, or after slag tapping in the slag tank, adding the pellets into the slag tank, wherein the adding amount of the pellets is 50-150kg per ton of steel slag;
5) Adding the pellets into a slag pot, standing the slag pot for 60-90min, and then treating according to a normal hot splashing slag treatment process;
6) After the steel slag treatment is finished, the Fe, cr, cd, ni, cu, pb, zn-enriched granular iron is recovered in a steel slag magnetic separation production line and is used as a raw material for steelmaking, and tailings are used as a raw material for building materials, cement production and road engineering industries.
The inventors found the following scientific phenomena through experiments and researches:
1. in the process of forming the converter steel slag, a large amount of molten metal is splashed out of a molten pool after being impacted in the process of impacting a converter metal molten pool by high-speed oxygen jet flow, and is splashed back to the molten pool under the action of gravity;
2. the main products of the Ill steel are building materials such as HRB400, Q235 and the like, the temperature of the converter liquid steel slag is between 1580 ℃ and 1750 ℃, fly ash is added into the converter liquid steel slag, harmful substances such as dioxin and the like in the fly ash are subjected to irreversible decomposition reaction, the converter steel slag contains a large amount of FeO and MnO, the reduction reaction can be carried out with carbon elements and heavy metals at high temperature, the reduction reaction can also be carried out with heavy metals, and the thermal conductivity of the converter steel slag after solidification is lower, under the process condition, the carbon elements and hydrogen elements dissociated from the fly ash can react with oxides in the converter steel slag relatively quickly, chlorine elements exist in the steel slag in the form of ions, and form stable compounds with MgO and the like in the steel slag according to the solidification characteristics of the steel slag in the solidification process, so that the substances such as dioxin and the like in the fly ash are decomposed relatively fully and thoroughly;
3. the metallurgical physicochemical reaction is carried out in the slag pot filled with liquid steel slag, after the slag at the upper part of the slag pot is solidified, the chemical reaction in the slag pot is carried out under the positive pressure condition, wherein the chemical reaction follows the ion-molecule coexistence theory of the steel slag reaction process, so that the special heavy metals such as Pb, zn, cd and the like in the fly ash are reduced and then are melted into molten iron liquid droplets in the steel slag, and the risk of vaporization and overflow of part of heavy metal elements is eliminated;
4. the chloride ions in the fly ash can react with f-MgO in the converter steel slag chemically in the slag solidification process, so that the gelation activity of the converter steel slag is improved.
5. The blast furnace gas ash produced by the steel contains 11% -20% of carbon elements, zinc, lead, potassium, sodium and other elements, belongs to solid waste which is difficult to recycle, heavy metal elements in the fly ash in the Yili region exist in the form of chlorides and oxides, and according to the characteristics of liquid steel slag, the carbon elements in the gas ash are utilized to reduce the heavy metal elements in the fly ash and the gas ash, and the endothermic effect of chemical reaction is utilized, so that the temperature of the steel slag can be reduced, the solidification of the steel slag is promoted, the harmless reaction of the fly ash and the gas ash is facilitated, and the recovered and reduced heavy metal in the slag treatment process is facilitated, and is used for steelmaking production.
According to the findings, the inventor adds magnesia waste and blast furnace gas ash into fly ash, presses the fly ash into pellets with the diameter of 30-50mm, then adds the pellets into a slag pot filled with converter liquid steel slag, and utilizes the high-temperature process conditions of the converter steel slag to recycle heavy metals in the fly ash, decompose dioxin in the fly ash and degrade f-CaO and f-MgO in the converter steel slag, thereby eliminating hazard factors of the fly ash while realizing on-line tempering of the converter steel slag. After the fly ash in the slag pot reacts for 60-90min, the steel slag is treated according to the normal hot splashing slag or hot disintegrating slag process, the granular iron material containing the melted heavy metal elements is recovered in the magnetic separation production line of the steel slag, and the tailings are used as raw materials for recycling in the building material industry, the road construction field and the cement production.
The innovation points of the invention are as follows: based on the above scientific findings, the inventors propose adding blast furnace gas ash into fly ash, using the blast furnace gas ash as a reducing agent for reducing and recovering heavy metal compounds in the fly ash and blast furnace gas ash, reducing heavy metals in the fly ash into metals, melting the metals into small iron liquid particles in converter steel slag, recycling the metals in the fly ash in a converter steel slag magnetic separation production line, and recycling the metals as a metallizing material or an alloy material for steelmaking, thereby realizing harmless conversion of heavy metal elements in the fly ash. Waste magnesia materials (waste slag of a tundish of a continuous casting machine) are added into the fly ash and are used for forming mineral composition of magnesia cement with chloride ions in the fly ash, so that the gelation activity of the steel slag is increased; the physical heat of the high-temperature converter steel slag is utilized to decompose dioxin in fly ash, carbon in the dioxin after decomposition is used as a reducing agent to reduce heavy metal oxides and compounds in the steel slag, so that the recovery of heavy metals such as metallic iron elements, nickel elements and the like from the steel slag is improved, the steel slag is used for steelmaking production, and the recycling of harmful substances is realized. The method has the advantages that the harm of f-CaO and f-MgO in the converter steel slag is eliminated by utilizing the characteristic of low alkalinity of the fly ash and the blast furnace gas ash, the performance of the converter steel slag is optimized while the fly ash is recycled, and the safety in the recycling process of the converter steel slag is ensured.
The beneficial contribution of the invention is as follows:
1. fly ash in the illite plough area is treated by landfill at present, and potential pollution risks still exist for the environment;
2. at present, the treatment of fly ash is mainly focused on the cooperative treatment of a cement kiln. Because the steel slag is an overburden silicate cement clinker, the final product of the invention is similar to the treatment result of a cement kiln, but the treatment cost is equivalent to 30% of the treatment cost of the cement kiln, and the invention has better economical efficiency;
3. the invention can recycle heavy metals in the fly ash, and is used as steelmaking raw materials or alloying materials for recycling, thereby realizing the recycling of the maximum value of rare heavy metal elements;
4. the invention utilizes the thermodynamic condition of the waste heat of the steel slag to decompose the dioxin, realizes the decomposition of the dioxin, and simultaneously ensures that the decomposition products participate in the deoxidation of the steel slag, thereby improving the hydration reaction activity of the steel slag and optimizing the stability of the converter steel slag in the recycling process.
The invention utilizes thermodynamic process conditions of the steel converter slag of the Italian steel, adopts an innovative process method, optimizes the resource utilization performance of the steel converter slag of the Italian steel while utilizing high-temperature steel slag to harmlessly treat the fly ash of the Italian region, increases the quantity of recovered metal elements from the steel slag for steel production, develops a very competitive process method for treating the fly ash generated after the garbage incineration in the Italian region in a large scale, protects the ecological environment of the Italian region, and shows the technical advantages of cross innovation in different technical fields.
Description of the embodiments
The embodiment of the invention takes a hot splashing production line of steel slag of Xinjiang Yi plow steel iron Limited of Chinese Bao groups as an example.
A method for cooperatively treating the fly ash in the Yili region by utilizing the Yili converter slag is implemented according to the following steps:
1) Firstly, transporting blast furnace gas ash, wherein the carbon content in the blast furnace gas ash is more than 80%, and the blast furnace gas ash is transported to a fly ash storage area of a garbage incineration plant in Yining city for standby;
2) Waste tundish coating produced by Yi-plow steel iron limited company, wherein the MgO content is more than 60 percent, is pulled and transported to a fly ash storage area of a waste incineration plant in Yi-Ning city for standby;
3) Uniformly mixing fly ash, blast furnace gas ash and waste tundish coating according to the mass percentage ratio of 75:15:10, pressing into pellets with the diameter of 30-50mm by adopting a high-pressure dry powder ball pressing machine, and pulling and transporting to an Italian steel converter slag treatment procedure for standby;
4) When the converter is in slag tapping, adding the pellets into a slag tank along with slag flow, or after slag tapping in the slag tank, adding the pellets into the slag tank, wherein the adding amount of the pellets is 50-150kg per ton of steel slag;
5) Adding the pellets into a slag pot, standing the slag pot for 60-90min, and then treating according to a normal hot splashing slag treatment process;
6) After the steel slag treatment is finished, the Fe, cr, cd, ni, cu, pb, zn-enriched granular iron is recovered in a steel slag magnetic separation production line and is used as a raw material for steelmaking, and tailings are used as a raw material for industries such as building materials, cement production, road engineering and the like.
Claims (1)
1. A method for cooperatively treating the fly ash in the Yili region by utilizing the Yili converter slag is characterized by comprising the following steps:
1) Firstly, transporting blast furnace gas ash, wherein the carbon content of the blast furnace gas ash is more than 80%, and the blast furnace gas ash is transported to a fly ash storage area of a garbage incineration plant in Yining city for standby;
2) Waste tundish coating produced by Yi-plow steel iron limited company, wherein the MgO content is more than 60 percent, is pulled and transported to a fly ash storage area of a waste incineration plant in Yi-Ning city for standby;
3) Uniformly mixing fly ash, blast furnace gas ash and waste tundish coating according to the mass percentage ratio of 75:15:10, pressing into pellets with the diameter of 30-50mm by adopting a high-pressure dry powder ball pressing machine, and pulling and transporting to an Italian steel converter slag treatment procedure for standby;
4) When the converter is in slag tapping, adding the pellets into a slag tank along with slag flow, or after slag tapping in the slag tank, adding the pellets into the slag tank, wherein the adding amount of the pellets is 50-150kg per ton of steel slag;
5) Adding the pellets into a slag pot, standing the slag pot for 60-90min, and then treating according to a normal hot splashing slag treatment process;
6) After the steel slag treatment is finished, the Fe, cr, cd, ni, cu, pb, zn-enriched granular iron is recovered in a steel slag magnetic separation production line and is used as a raw material for steelmaking, and tailings are used as a raw material for building materials, cement production and road engineering industries.
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| CN202310237305.3A CN116174456B (en) | 2023-03-13 | 2023-03-13 | Method for cooperatively treating fly ash in Yili region by utilizing Yili converter slag |
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| CN202310237305.3A CN116174456B (en) | 2023-03-13 | 2023-03-13 | Method for cooperatively treating fly ash in Yili region by utilizing Yili converter slag |
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| CN116174456B true CN116174456B (en) | 2023-11-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040042537A (en) * | 2002-11-14 | 2004-05-20 | 주식회사 포스코 | Converter working method of phosphorous added low carbon steel using ladle slag |
| CN101074457A (en) * | 2006-05-16 | 2007-11-21 | 重庆大学 | Method for smelting and separating refuse-combustion fly-ash heavy metal |
| CN104131130A (en) * | 2014-07-17 | 2014-11-05 | 攀钢集团西昌钢钒有限公司 | Converter final-slag modifier and use thereof |
| 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 |
| CN112441759A (en) * | 2019-08-29 | 2021-03-05 | 宝山钢铁股份有限公司 | Method and device for treating waste incineration fly ash with low energy consumption, resource utilization and environmental protection |
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| CN115716738A (en) * | 2022-12-09 | 2023-02-28 | 新源县渣宝环保技术有限公司 | Production process of high-strength steel slag brick |
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