CN115058592A - Method for mixing and preparing multiple types of dedusting ash in ferrous metallurgy and returning to sintering - Google Patents
Method for mixing and preparing multiple types of dedusting ash in ferrous metallurgy and returning to sintering Download PDFInfo
- Publication number
- CN115058592A CN115058592A CN202210778215.0A CN202210778215A CN115058592A CN 115058592 A CN115058592 A CN 115058592A CN 202210778215 A CN202210778215 A CN 202210778215A CN 115058592 A CN115058592 A CN 115058592A
- Authority
- CN
- China
- Prior art keywords
- dust
- iron
- sintering
- mixing
- returning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005245 sintering Methods 0.000 title claims abstract description 45
- 238000002156 mixing Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000009851 ferrous metallurgy Methods 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000000428 dust Substances 0.000 claims abstract description 77
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910052742 iron Inorganic materials 0.000 claims abstract description 41
- 239000000292 calcium oxide Substances 0.000 claims abstract description 32
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 31
- 239000008188 pellet Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000009865 steel metallurgy Methods 0.000 claims abstract description 18
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 230000004907 flux Effects 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000012141 concentrate Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims abstract description 10
- 235000012054 meals Nutrition 0.000 claims abstract description 9
- 235000012255 calcium oxide Nutrition 0.000 claims description 30
- 239000011230 binding agent Substances 0.000 claims description 14
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 11
- 235000008504 concentrate Nutrition 0.000 claims description 10
- 238000005453 pelletization Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 239000006188 syrup Substances 0.000 claims description 4
- 235000020357 syrup Nutrition 0.000 claims description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- -1 returned ore Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- YPFNIPKMNMDDDB-UHFFFAOYSA-K 2-[2-[bis(carboxylatomethyl)amino]ethyl-(2-hydroxyethyl)amino]acetate;iron(3+) Chemical compound [Fe+3].OCCN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O YPFNIPKMNMDDDB-UHFFFAOYSA-K 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本申请提供了一种钢铁冶金中多种除尘灰混合配制返回烧结的方法，将高碳除尘灰、高铁除尘灰、高氧化钙除尘灰以及粘结剂在混合机中混合均匀，然后经造球制成除尘灰小球，然后将除尘灰小球加入二次混合机中与混匀铁精矿、返矿、燃料以及熔剂混合均匀，然后将混匀生料加入烧结机中进行烧结，得到成品的烧结矿；控制除尘灰小球的粒度为3‑8mm，消除了原除尘灰容易堵塞烧结料层孔隙导致的料层透气性变差问题；通过3种除尘灰的合理配比、分类配入、有序使用，保证了除尘灰小球的成分稳定，解决了原有的混合料中碳含量波动、烧结矿中的氧化钙含量不稳定等问题，消除了多种不同含量的除尘灰对烧结矿的产量和质量的影响，提高了烧结矿的质量与产量。The application provides a method for mixing and preparing various dust removal dusts in iron and steel metallurgy and returning to sintering. The dust-removing pellets are made, and then the dust-removing pellets are added to the secondary mixer to mix evenly with the mixed iron concentrate, returned ore, fuel and flux, and then the mixed raw meal is added to the sintering machine for sintering to obtain the finished product The particle size of the dust-removing ash pellets is controlled to be 3-8mm, which eliminates the problem of poor air permeability of the material layer caused by the easy blocking of the pores of the sintered material layer by the original dust-removing dust; , orderly use, to ensure the stability of the composition of the dust pellets, to solve the problems of fluctuation of carbon content in the original mixture, unstable calcium oxide content in the sintered ore, etc. The impact on the output and quality of the ore increases the quality and output of the sintered ore.
Description
技术领域technical field
本发明涉及钢铁冶金技术领域，尤其是涉及一种钢铁冶金中多种除尘灰混合配制返回烧结的方法。The invention relates to the technical field of iron and steel metallurgy, in particular to a method for mixing, preparing, and returning to sintering of various dust removal dusts in iron and steel metallurgy.
背景技术Background technique
在长流程钢铁冶炼的生产过程中，各个工艺流程都会产生除尘灰，通常除尘灰的处理方式是返回烧结工序中参与烧结，做为含铁或含碳原料重新使用，这样处理会给烧结工序带来一系列负面影响，包括烧结料层的透气性变差、混合料中碳含量波动、烧结矿中的氧化钙含量不稳定等问题，进而导致烧结矿的产量和质量下降。In the production process of long-term iron and steel smelting, dust removal is generated in each process. Usually, the dust removal method is to return to the sintering process to participate in sintering and reuse it as iron-containing or carbon-containing raw materials. A series of negative effects, including poor air permeability of the sinter layer, fluctuating carbon content in the mixture, and unstable calcium oxide content in the sinter, lead to a decline in the yield and quality of the sinter.
烧结矿是将粉铁矿、各类助熔剂及细焦炭经混拌、造粒后，经布料系统加入烧结机中，由点火炉点燃细焦炭，经由抽气风车抽风完成烧结反应，烧结矿经破碎冷却、筛选后，送往高炉作为冶炼铁水的主要原料。烧结原料有各种富铁矿粉、焦粉、钢铁厂粉尘和粉粒状含铁废料等。Sintered ore is a process of mixing and granulating fine iron ore, various fluxes and fine coke, and then adding it to the sintering machine through the distribution system, igniting the fine coke by the ignition furnace, and completing the sintering reaction by exhausting the air through the air extraction windmill. After crushing, cooling and screening, it is sent to the blast furnace as the main raw material for smelting molten iron. The raw materials for sintering include various iron-rich ore powder, coke powder, iron and steel mill dust and powdery iron-containing waste.
发明内容SUMMARY OF THE INVENTION
本发明的目的是提供一种钢铁冶金中多种除尘灰混合配制返回烧结的方法，使得钢铁冶金中的各个工序产生的含铁、含碳或者含钙的除尘灰在烧结工序中合理使用，消除含铁、含碳或者含钙的除尘灰对烧结矿的产量和质量的影响，实现除尘灰这种冶金固废资源的合理有效的回收利用。The purpose of the present invention is to provide a method for mixing and preparing various dust removal dusts and returning to sintering in iron and steel metallurgy, so that the iron-containing, carbon-containing or calcium-containing dust removal dust generated by various processes in iron and steel metallurgy can be reasonably used in the sintering process, eliminating the need for The influence of iron-containing, carbon-containing or calcium-containing dust dust on the output and quality of sintered ore can realize the reasonable and effective recycling of dust dust, a metallurgical solid waste resource.
为解决上述技术问题，本发明提出的技术方案为：In order to solve the above-mentioned technical problems, the technical scheme proposed by the present invention is:
一种钢铁冶金中多种除尘灰混合配制返回烧结的方法，包括以下依次进行的步骤：A method for mixing and preparing multiple dust removal dusts in iron and steel metallurgy and returning to sintering comprises the following steps in sequence:
1) 将高碳除尘灰、高铁除尘灰、高氧化钙除尘灰以及粘结剂在混合机中混合均匀，完成后得到混匀料；1) Mix high-carbon dust, high-speed iron dust, high calcium oxide dust and binder in a mixer evenly, and obtain a mixed material after completion;
2) 将步骤1)得到的混匀料加入造球机中，经造球制成除尘灰小球；2) adding the mixed material obtained in step 1) into the pelletizing machine, and making the dust-removing pellets through pelletizing;
3) 将步骤2)得到的除尘灰小球加入二次混合机中，在二次混合机中除尘灰小球、混匀铁精矿、返矿、燃料以及熔剂混合均匀，完成后得到混匀生料；3) Add the dust-removing pellets obtained in step 2) into the secondary mixer, and in the secondary mixer, the dust-removing pellets, the iron concentrate, the returned ore, the fuel and the flux are mixed uniformly, and the mixing is obtained after completion. Raw material;
4) 将步骤3)得到的混匀生料加入烧结机中，依次进行布料、点火、烧结，完成后得到成品的烧结矿。4) Add the mixed raw meal obtained in step 3) into the sintering machine, and sequentially carry out distribution, ignition and sintering, and after completion, the finished sintered ore is obtained.
优选的，步骤1)中，高碳除尘灰包括以下质量百分数的组分：30%-35%的TFe，1.0%-2.0%的CaO，1.0%-1.5%的MgO，4%-6%的SiO2，2%-4%的A12O3，25%-30%的C，0.1%-0.3%的Na2O，0.3%-0.6%的K2O，4%-7%的ZnO。Preferably, in step 1), the high carbon dust ash includes the following components by mass percentage: 30%-35% TFe, 1.0%-2.0% CaO, 1.0%-1.5% MgO, 4%-6% SiO 2 , 2%-4% A1 2 O 3 , 25%-30% C, 0.1%-0.3% Na 2 O, 0.3%-0.6% K 2 O, 4%-7% ZnO.
优选的，步骤1)中，高铁除尘灰包括以下质量百分数的组分：55%-65%的TFe，10%-15%的CaO，2%-4%的MgO，1%-3%的SiO2，0.1%-1.0%的A12O3，0.1%-1.0%的C，0.1%-0.5%的Na2O，0.1%-0.5%的K2O，2%-4%的ZnO。Preferably, in step 1), the high-speed iron dust removal includes the following components by mass percentage: 55%-65% TFe, 10%-15% CaO, 2%-4% MgO, 1%-3% SiO 2 , 0.1%-1.0% A1 2 O 3 , 0.1%-1.0% C, 0.1%-0.5% Na 2 O, 0.1%-0.5% K 2 O, 2%-4% ZnO.
优选的，步骤1)中，高氧化钙除尘灰包括以下质量百分数的组分：2%-5%的TFe，55%-65%的CaO，10%-13%的MgO，1.0%-2.0%的SiO2，0.1%-1.0%的A12O3，1%-3%的C，0.1%-0.5%的Na2O，0.1%-1.0%的K2O，0.1%-1.0%的ZnO。Preferably, in step 1), the high calcium oxide dust ash includes the following components by mass percentage: 2%-5% TFe, 55%-65% CaO, 10%-13% MgO, 1.0%-2.0% SiO 2 , 0.1%-1.0% A1 2 O 3 , 1%-3% C, 0.1%-0.5% Na 2 O, 0.1%-1.0% K 2 O, 0.1%-1.0% ZnO .
优选的，步骤1)中，粘结剂包括以下质量百分数的组分：10%-15%的淀粉，10%-15%的糖浆，10%-15%的生石灰，余量的膨润土。Preferably, in step 1), the binder comprises the following components by mass percentage: 10%-15% starch, 10%-15% syrup, 10%-15% quicklime, and the balance of bentonite.
优选的，步骤1)中，混匀料的配料：高碳除尘灰的配比是25%-35%，高铁除尘灰的配比是35%-45%，高氧化钙除尘灰的配比是25%-35%，余量的粘结剂。Preferably, in step 1), the ingredients of the mixing material: the proportion of high-carbon dust dust is 25%-35%, the proportion of high-speed iron dust dust is 35%-45%, and the proportion of high calcium oxide dust dust is 25%-35%, the balance of binder.
优选的，步骤2)中，除尘灰小球中的水分控制范围为10%-15%，除尘灰小球的粒度控制为3mm-8mm。Preferably, in step 2), the moisture control range in the dust-removing pellets is 10%-15%, and the particle size of the dust-removing pellets is controlled to be 3mm-8mm.
优选的，步骤3)中，混匀生料的配比：60%-70%的混匀铁精矿，15%-20%的返矿，4%-8%的燃料，5%-10%的熔剂，余量的除尘灰小球。Preferably, in step 3), the ratio of the mixed raw meal: 60%-70% of the mixed iron concentrate, 15%-20% of the returned ore, 4%-8% of the fuel, 5%-10% of flux, and the remainder of the dust pellets.
本申请取得了如下的有益的技术效果：The application has achieved the following beneficial technical effects:
1) 本申请使用经过制粒的除尘灰小球，除尘灰小球的粒度控制范围为3mm-8mm，基本消除了原来的除尘灰堵塞烧结料层孔隙导致的料层透气性变差的问题。1) This application uses granulated dust-removing balls, and the particle size control range of the dust-removing balls is 3mm-8mm, which basically eliminates the problem of poor air permeability of the material layer caused by the original dust-removing dust blocking the pores of the sintered material layer.
2) 本申请通过3种除尘灰的合理配比、分类配入、有序使用，可以保证除尘灰小球的化学成分稳定，解决了原有的混合料中碳含量波动、烧结矿中的氧化钙含量不稳定等问题，避免了对烧结矿的质量与产量构成不利影响。2) In this application, through the reasonable proportioning, classified allocation and orderly use of three kinds of dust removal dust, the chemical composition of dust removal dust balls can be guaranteed to be stable, and the fluctuation of carbon content in the original mixture and the oxidation of sintered ore can be solved. Unstable calcium content and other problems avoid adverse effects on the quality and yield of sintered ore.
3) 本申请使得钢铁冶金中的各个工序产生的含铁、含碳或者含钙的除尘灰在烧结工序中合理使用，消除了含铁、含碳或者含钙的除尘灰对烧结矿的产量和质量的影响，实现了除尘灰这种冶金固废资源的合理有效的回收利用。3) This application makes the iron-containing, carbon-containing or calcium-containing dust generated in various processes in iron and steel metallurgy to be reasonably used in the sintering process, eliminating the impact of iron-, carbon- or calcium-containing dust on the output and output of sintered ore. The impact of quality, the reasonable and effective recycling and utilization of metallurgical solid waste resources such as dust ash is realized.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are of the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
本申请提供了一种钢铁冶金中多种除尘灰混合配制返回烧结的方法，包括以下依次进行的步骤：The present application provides a method for mixing, preparing, and returning to sintering of various dust removal dusts in iron and steel metallurgy, including the following steps in sequence:
1) 将高碳除尘灰、高铁除尘灰、高氧化钙除尘灰以及粘结剂在混合机中混合均匀，完成后得到混匀料；1) Mix high-carbon dust, high-speed iron dust, high calcium oxide dust and binder in a mixer evenly, and obtain a mixed material after completion;
2) 将步骤1)得到的混匀料加入造球机中，经造球制成除尘灰小球；2) adding the mixed material obtained in step 1) into the pelletizing machine, and making the dust-removing pellets through pelletizing;
3) 将步骤2)得到的除尘灰小球加入二次混合机中，在二次混合机中除尘灰小球、混匀铁精矿、返矿、燃料以及熔剂混合均匀，完成后得到混匀生料；3) Add the dust-removing pellets obtained in step 2) into the secondary mixer, and in the secondary mixer, the dust-removing pellets, the iron concentrate, the returned ore, the fuel and the flux are mixed uniformly, and the mixing is obtained after completion. Raw material;
4) 将步骤3)得到的混匀生料加入烧结机中，依次进行布料、点火、烧结，完成后得到成品的烧结矿。4) Add the mixed raw meal obtained in step 3) into the sintering machine, and sequentially carry out distribution, ignition and sintering, and after completion, the finished sintered ore is obtained.
在本申请的一个实施例中，步骤1)中，高碳除尘灰包括以下质量百分数的组分：30%-35%的TFe，1.0%-2.0%的CaO，1.0%-1.5%的MgO，4%-6%的SiO2，2%-4%的A12O3，25%-30%的C，0.1%-0.3%的Na2O，0.3%-0.6%的K2O，4%-7%的ZnO。In an embodiment of the present application, in step 1), the high-carbon dust dust includes the following components in mass percentage: 30%-35% TFe, 1.0%-2.0% CaO, 1.0%-1.5% MgO, 4%-6% SiO 2 , 2%-4% A1 2 O 3 , 25%-30% C, 0.1%-0.3% Na 2 O, 0.3%-0.6% K 2 O, 4% -7% ZnO.
在本申请的一个实施例中，步骤1)中，高铁除尘灰包括以下质量百分数的组分：55%-65%的TFe，10%-15%的CaO，2%-4%的MgO，1%-3%的SiO2，0.1%-1.0%的A12O3，0.1%-1.0%的C，0.1%-0.5%的Na2O，0.1%-0.5%的K2O，2%-4%的ZnO。In an embodiment of the present application, in step 1), the high-speed iron dust ash includes the following components by mass percentage: 55%-65% TFe, 10%-15% CaO, 2%-4% MgO, 1 %-3% SiO 2 , 0.1%-1.0% A1 2 O 3 , 0.1%-1.0% C, 0.1%-0.5% Na 2 O, 0.1%-0.5% K 2 O, 2%- 4% ZnO.
在本申请的一个实施例中，步骤1)中，高氧化钙除尘灰包括以下质量百分数的组分：2%-5%的TFe，55%-65%的CaO，10%-13%的MgO，1.0%-2.0%的SiO2，0.1%-1.0%的A12O3，1%-3%的C，0.1%-0.5%的Na2O，0.1%-1.0%的K2O，0.1%-1.0%的ZnO。In an embodiment of the present application, in step 1), the high calcium oxide dust includes the following components by mass percentage: 2%-5% TFe, 55%-65% CaO, 10%-13% MgO , 1.0%-2.0% SiO 2 , 0.1%-1.0% A1 2 O 3 , 1%-3% C, 0.1%-0.5% Na 2 O, 0.1%-1.0% K 2 O , 0.1 %-1.0% ZnO.
在本申请的一个实施例中，步骤1)中，粘结剂包括以下质量百分数的组分：10%-15%的淀粉，10%-15%的糖浆，10%-15%的生石灰，余量的膨润土。In an embodiment of the present application, in step 1), the binder includes the following components in mass percentage: 10%-15% starch, 10%-15% syrup, 10%-15% quicklime, and the remainder amount of bentonite.
在本申请的一个实施例中，步骤1)中，混匀料的配料：高碳除尘灰的配比是25%-35%，高铁除尘灰的配比是35%-45%，高氧化钙除尘灰的配比是25%-35%，余量的粘结剂。In an embodiment of the present application, in step 1), the ingredients of the mixed material: the proportion of high-carbon dust dust is 25%-35%, the proportion of high-speed iron dust dust is 35%-45%, high calcium oxide The proportion of dust removal is 25%-35%, and the balance is binder.
在本申请的一个实施例中，步骤2)中，除尘灰小球中的水分控制范围为10%-15%，除尘灰小球的粒度控制为3mm-8mm。In an embodiment of the present application, in step 2), the moisture control range in the dust-removing dust pellets is 10%-15%, and the particle size of the dust-removing dust pellets is controlled to be 3mm-8mm.
在本申请的一个实施例中，步骤3)中，混匀生料的配比：60%-70%的混匀铁精矿，15%-20%的返矿，4%-8%的燃料，5%-10%的熔剂，余量的除尘灰小球。In an embodiment of the present application, in step 3), the ratio of the mixed raw meal: 60%-70% of the mixed iron concentrate, 15%-20% of the returned ore, 4%-8% of the fuel , 5%-10% of the flux, the remainder of the dust balls.
本申请中，在烧结配料室设置四个以上除尘灰仓，分别装入上述成分不同的除尘灰，包括高碳灰、高铁灰、高氧化钙灰、粘结剂，不同成分的除尘灰按照产生量设定配比，通过配料秤均衡配入，同时配入少量的粘结剂，经过强力混合机混匀润湿后，再加入圆盘造球机，将除尘灰制成3-8mm的小球，然后通过皮带机送至二次混合机的前端皮带上，在二次混合机中与与其它的烧结原料混合均匀，最后加入烧结机中，依次进行布料、点火、烧结，完成后得到成品的烧结矿。In the present application, more than four dust-removing ash bins are set in the sintering batching room, and the above-mentioned dust-removing ash with different components is respectively loaded, including high-carbon ash, high-iron ash, high-calcium oxide ash, and binder. The dust-removing ash with different components is produced according to the The amount is set and the proportion is set, and it is evenly distributed through the batching scale, and a small amount of binder is added at the same time. After mixing and wetting by a strong mixer, it is added to a disc pelletizer to make the dust into 3-8mm small particles. The balls are then sent to the front-end belt of the secondary mixer through the belt conveyor, mixed with other sintering raw materials in the secondary mixer, and finally added to the sintering machine, followed by cloth, ignition, sintering, and the finished product is obtained after completion. of sinter.
本申请中，烧结矿的生产主要包括原料准备、配料、混合、烧结；In this application, the production of sinter mainly includes raw material preparation, batching, mixing, and sintering;
原料准备：含铁原料，含铁量较高、粒度≤5mm的矿粉，包括铁精矿、高炉炉尘、轧钢皮、钢渣等；熔剂，要求熔剂中有效CaO含量高，杂质少，成分稳定，含水3%左右，粒度小于3mm的占90%以上，例如白云石；燃料，主要为高炉筛下焦粉和无烟煤；Raw material preparation: iron-containing raw materials, ore powder with high iron content and particle size ≤5mm, including iron concentrate, blast furnace dust, rolled steel skin, steel slag, etc.; flux, requires high effective CaO content in the flux, less impurities, and stable composition , the water content is about 3%, and the particle size less than 3mm accounts for more than 90%, such as dolomite; the fuel is mainly coke powder and anthracite under blast furnace sieve;
配料：常用质量配料法；Ingredients: commonly used quality ingredients method;
混合：使得烧结料的成分均匀，水分合适，易于造球，从而获得粒度组成良好的烧结混合料，以保证烧结矿的质量和提高产量，混合作业包括加水润湿、混匀和造球，一次混合的目的是润湿与混匀，二次混合的目的是继续混匀，造球，以改善烧结料层透气性；Mixing: Make the composition of the sintered material uniform, the moisture is suitable, and it is easy to make pellets, so as to obtain a sintered mixture with good particle size and composition, so as to ensure the quality of the sintered ore and improve the output. The purpose of mixing is wetting and mixing, and the purpose of secondary mixing is to continue mixing and forming pellets to improve the permeability of the sintered material layer;
使用细磨精矿粉烧结时，因粒度过细，料层透气性差，为改善透气性，必须在混合过程中造球，所以采用两次混合，混合时间一般不少于2.5-3min，烧结厂大多采用两次混合；When finely ground concentrate powder is used for sintering, because the particle size is too fine, the air permeability of the material layer is poor. In order to improve the air permeability, it is necessary to make pellets during the mixing process. Therefore, two times of mixing are used, and the mixing time is generally not less than 2.5-3min. Use two blends;
烧结：烧结作业是烧结生产的中心环节，包括布料、点火、烧结等主要工序。Sintering: The sintering operation is the central part of sintering production, including the main processes such as cloth distribution, ignition, and sintering.
本申请中，返矿是指未完全烧好的烧结矿，包括沿烧结机台车两侧和表层的烧结矿以及经受机械负荷后产生的粉末，环境除尘所回收的尘泥等需要再返回至烧结过程中去的细粒粉料，一般小于5-6mm。In this application, the returned ore refers to the sintered ore that has not been completely burned, including the sintered ore along both sides and the surface of the sintering machine trolley and the powder generated after being subjected to mechanical load, and the dust and sludge recovered from environmental dust removal need to be returned to the The fine-grained powder removed during the sintering process is generally less than 5-6mm.
本申请中的含量(%)与配比(%)均为质量百分数。The content (%) and the ratio (%) in this application are all mass percentages.
本发明未详尽描述的方法和装置均为现有技术，不再赘述。The methods and devices that are not described in detail in the present invention are all in the prior art and will not be described again.
为了进一步理解本发明，下面结合实施例对本发明提供的一种钢铁冶金中多种除尘灰混合配制返回烧结的方法进行详细说明，本发明的保护范围不受以下实施例的限制。In order to further understand the present invention, a method for mixing and preparing various dust removal dusts in iron and steel metallurgy provided by the present invention and returning to sintering is described in detail below with reference to the examples. The protection scope of the present invention is not limited by the following examples.
实施例1Example 1
实施例1提供了一种钢铁冶金中多种除尘灰混合配制返回烧结的方法，包括以下依次进行的步骤：Embodiment 1 provides a method for mixing, preparing, and returning to sintering of various dust removal dusts in iron and steel metallurgy, including the following steps in sequence:
1) 将高碳除尘灰、高铁除尘灰、高氧化钙除尘灰以及粘结剂在混合机中混合均匀，完成后得到混匀料；1) Mix high-carbon dust, high-speed iron dust, high calcium oxide dust and binder in a mixer evenly, and obtain a mixed material after completion;
步骤1)中，高碳除尘灰包括以下质量百分数的组分：33.6%的TFe，1.5%的CaO，1.21%的MgO，5.03%的SiO2，3.1%的A12O3，26%的C，0.21%的Na2O，0.45%的K2O，5.5%的ZnO；In step 1), the high-carbon dust dust includes the following components by mass percentage: 33.6% TFe, 1.5% CaO, 1.21% MgO, 5.03% SiO 2 , 3.1% A1 2 O 3 , 26% C , 0.21% Na 2 O, 0.45% K 2 O, 5.5% ZnO;
步骤1)中，高铁除尘灰包括以下质量百分数的组分：58.9%的TFe，11.7%的CaO，2.7%的MgO，1.3%的SiO2，0.4%的A12O3，0.5%的C，0.2%的Na2O，0.3%的K2O，2.1%的ZnO；In step 1), the high-speed iron dust dust includes the following components by mass percentage: 58.9% TFe, 11.7% CaO, 2.7% MgO, 1.3% SiO 2 , 0.4% A1 2 O 3 , 0.5% C, 0.2% Na 2 O, 0.3% K 2 O, 2.1% ZnO;
步骤1)中，高氧化钙除尘灰包括以下质量百分数的组分：2.4%的TFe，58.5%的CaO，11.3%的MgO，1.2%的SiO2，0.5%的A12O3，1.4%的C，0.2%的Na2O，0.5%的K2O，0.7%的ZnO；In step 1), the high calcium oxide dust ash includes the following components by mass percentage: 2.4% of TFe, 58.5% of CaO, 11.3% of MgO, 1.2% of SiO 2 , 0.5% of Al 2 O 3 , 1.4% of C, 0.2% Na 2 O, 0.5% K 2 O, 0.7% ZnO;
步骤1)中，粘结剂包括以下质量百分数的组分：10.5%的淀粉，11%的糖浆，13%的生石灰，余量的膨润土；In step 1), the binder comprises the following components in mass percentage: 10.5% starch, 11% syrup, 13% quicklime, and the remainder of bentonite;
步骤1)中，混匀料的配料：高碳除尘灰的配比是30.5%，高铁除尘灰的配比是40%，高氧化钙除尘灰的配比是27.5%，余量的粘结剂；In step 1), the ingredients of the mixing material: the proportion of high-carbon dust removal ash is 30.5%, the proportion of high-speed iron dust removal ash is 40%, the proportion of high calcium oxide dust removal ash is 27.5%, and the balance of the binder ;
2) 将步骤1)得到的混匀料加入造球机中，经造球制成除尘灰小球；2) adding the mixed material obtained in step 1) into the pelletizing machine, and making the dust-removing pellets through pelletizing;
步骤2)中，除尘灰小球中的水分控制范围为10%-15%，除尘灰小球的粒度控制为3mm-8mm；In step 2), the moisture control range in the dust-removing ash pellets is 10%-15%, and the particle size of the dust-removing ash pellets is controlled to be 3mm-8mm;
3) 将步骤2)得到的除尘灰小球加入二次混合机中，在二次混合机中除尘灰小球、混匀铁精矿、返矿、燃料以及熔剂混合均匀，完成后得到混匀生料；3) Add the dust-removing pellets obtained in step 2) into the secondary mixer, and in the secondary mixer, the dust-removing pellets, the iron concentrate, the returned ore, the fuel and the flux are mixed uniformly, and the mixing is obtained after completion. Raw material;
步骤3)中，混匀生料的配比：66%的混匀铁精矿，17%的返矿，4%的燃料，6.5%的熔剂，余量的除尘灰小球；In step 3), the ratio of the mixed raw meal: 66% of the mixed iron concentrate, 17% of the returned ore, 4% of the fuel, 6.5% of the flux, and the remainder of the dust pellets;
4) 将步骤3)得到的混匀生料加入烧结机中，依次进行布料、点火、烧结，完成后得到成品的烧结矿。4) Add the mixed raw meal obtained in step 3) into the sintering machine, and sequentially carry out distribution, ignition and sintering, and after completion, the finished sintered ore is obtained.
以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。The descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210778215.0A CN115058592A (en) | 2022-07-04 | 2022-07-04 | Method for mixing and preparing multiple types of dedusting ash in ferrous metallurgy and returning to sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210778215.0A CN115058592A (en) | 2022-07-04 | 2022-07-04 | Method for mixing and preparing multiple types of dedusting ash in ferrous metallurgy and returning to sintering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115058592A true CN115058592A (en) | 2022-09-16 |
Family
ID=83205071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210778215.0A Pending CN115058592A (en) | 2022-07-04 | 2022-07-04 | Method for mixing and preparing multiple types of dedusting ash in ferrous metallurgy and returning to sintering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115058592A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115786691A (en) * | 2022-12-07 | 2023-03-14 | 包头钢铁（集团）有限责任公司 | A Method for Reducing Sintering Fuel Consumption by Using Carbon-Containing Dust Ash and Iron-Containing Sludge |
| CN117025946A (en) * | 2023-07-05 | 2023-11-10 | 山东钢铁集团日照有限公司 | Treatment method of fly ash and application of sintered mixture |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070266824A1 (en) * | 2006-05-19 | 2007-11-22 | Stein Joseph L | Using a slag conditioner to beneficiate bag house dust from a steel making furnace |
| CN101250624A (en) * | 2008-03-31 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Technique of dedusting gray for sintered mine |
| JP2014114494A (en) * | 2012-12-11 | 2014-06-26 | Nippon Steel & Sumitomo Metal | Method for production of sintered ore |
| CN106544498A (en) * | 2015-09-17 | 2017-03-29 | 宝山钢铁股份有限公司 | A kind of iron dust containing high-efficiency sintered method |
| CN113604660A (en) * | 2021-06-21 | 2021-11-05 | 酒泉钢铁(集团)有限责任公司 | Dedusting ash micronized recycling process method |
-
2022
- 2022-07-04 CN CN202210778215.0A patent/CN115058592A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070266824A1 (en) * | 2006-05-19 | 2007-11-22 | Stein Joseph L | Using a slag conditioner to beneficiate bag house dust from a steel making furnace |
| CN101250624A (en) * | 2008-03-31 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Technique of dedusting gray for sintered mine |
| JP2014114494A (en) * | 2012-12-11 | 2014-06-26 | Nippon Steel & Sumitomo Metal | Method for production of sintered ore |
| CN106544498A (en) * | 2015-09-17 | 2017-03-29 | 宝山钢铁股份有限公司 | A kind of iron dust containing high-efficiency sintered method |
| CN113604660A (en) * | 2021-06-21 | 2021-11-05 | 酒泉钢铁(集团)有限责任公司 | Dedusting ash micronized recycling process method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115786691A (en) * | 2022-12-07 | 2023-03-14 | 包头钢铁（集团）有限责任公司 | A Method for Reducing Sintering Fuel Consumption by Using Carbon-Containing Dust Ash and Iron-Containing Sludge |
| CN117025946A (en) * | 2023-07-05 | 2023-11-10 | 山东钢铁集团日照有限公司 | Treatment method of fly ash and application of sintered mixture |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115058592A (en) | Method for mixing and preparing multiple types of dedusting ash in ferrous metallurgy and returning to sintering | |
| CN109055731B (en) | Dust granulation process and iron ore sintering process | |
| CN113604660A (en) | Dedusting ash micronized recycling process method | |
| CN101240375A (en) | Iron sinter efflorescence-resisting agent and producing method thereof | |
| CN102978384B (en) | Method for using steel slags during sintering | |
| US4168966A (en) | Agglomerates for use in a blast furnace and method of making the same | |
| EP3266884B1 (en) | Quasiparticles for sintering and method of producing same | |
| CN114763582A (en) | Method for producing magnesium pellets by using oriented silicon steel magnesium oxide waste | |
| CN117418068A (en) | Self-circulation treatment process for dedusting ash of carbon steel electric furnace | |
| CN114703364B (en) | Method for producing sinter by high-proportion FB powder | |
| US4518428A (en) | Agglomerates containing olivine | |
| JP2000256731A (en) | Method for producing calcium ferrite for molten iron refining | |
| US4963185A (en) | Agglomerates containing olivine for use in blast furnace | |
| US3825638A (en) | Method for producing cold bound agglomerates from particulate mineral concentrates | |
| JPS63282216A (en) | Method for producing sintered ore with excellent reducibility | |
| CN110042227B (en) | Sintered ore and preparation method thereof | |
| JP2001348610A (en) | Slag accelerator | |
| CN113215395A (en) | Production method of cold-solidified pellet | |
| RU2768432C2 (en) | Method for production of fluxed iron ore agglomerate | |
| RU2820429C1 (en) | Method of producing iron ore pellets | |
| JPH0583620B2 (en) | ||
| EP1980632A1 (en) | The agglomeration of metal production dust with geopolymer resin | |
| CN117867267B (en) | Premelted pellet for reducing free calcium oxide in steel slag and preparation method | |
| CN120249657A (en) | Method for preparing sinter by recycling long-process multiple solid waste resources | |
| JP4661077B2 (en) | Method for producing sintered ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220916 |
|
| RJ01 | Rejection of invention patent application after publication |