CN102492792A - Molten steel slag tempering and modifying processing method - Google Patents
Molten steel slag tempering and modifying processing method Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 200
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 105
- 239000010959 steel Substances 0.000 title claims abstract description 105
- 238000005496 tempering Methods 0.000 title claims abstract description 24
- 238000003672 processing method Methods 0.000 title abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 55
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 55
- 239000004571 lime Substances 0.000 claims abstract description 55
- 239000000843 powder Substances 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 238000009628 steelmaking Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 12
- 230000003750 conditioning effect Effects 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 27
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 230000004048 modification Effects 0.000 claims description 15
- 238000012986 modification Methods 0.000 claims description 15
- 238000010791 quenching Methods 0.000 claims description 15
- 230000000171 quenching effect Effects 0.000 claims description 15
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 13
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 13
- 238000004321 preservation Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000000292 calcium oxide Substances 0.000 description 21
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 239000000126 substance Substances 0.000 description 15
- 238000001816 cooling Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
Description
技术领域 technical field
本发明属于冶金工业中钢渣处理技术领域，具体涉及一种熔融钢渣调质改性处理方法。The invention belongs to the technical field of steel slag treatment in the metallurgical industry, and in particular relates to a quenching and tempering modification treatment method for molten steel slag.
背景技术 Background technique
随着中国现代化建设的快速发展，钢铁产量不断攀升，相应排出的钢渣量也持续增加。2010年中国粗钢产量为6.27亿吨，产生钢渣一亿多吨，而目前中国钢渣有效利用率仅40％左右，大量钢渣堆积不仅占用耕地，而且造成资源浪费和环境污染。With the rapid development of China's modernization, the output of steel continues to rise, and the amount of steel slag discharged correspondingly continues to increase. In 2010, China's crude steel output was 627 million tons, producing more than 100 million tons of steel slag, but the current effective utilization rate of steel slag in China is only about 40%. The accumulation of a large amount of steel slag not only occupies arable land, but also causes waste of resources and environmental pollution.
造成钢渣利用率低的主要原因有两个：一是钢渣中游离氧化钙含量高，造成应用中安定性不良；二是钢渣胶凝活性差，水化缓慢，难以大量掺加到水泥中使用。目前热态转炉钢渣的处理主要采用热泼法、焖渣法、水淬法等，这些处理方法仅能部分消解钢渣中的游离氧化钙，但无法提高钢渣胶凝活性。There are two main reasons for the low utilization rate of steel slag: one is the high content of free calcium oxide in steel slag, which leads to poor stability in application; the other is that steel slag has poor gelling activity and slow hydration, making it difficult to add a large amount to cement for use. At present, hot converter steel slag is mainly treated by hot pouring method, slag stewing method, water quenching method, etc. These treatment methods can only partially dissolve the free calcium oxide in steel slag, but cannot improve the gelling activity of steel slag.
转炉炼钢排出的钢渣温度在1600℃左右，高炉炼铁排出的矿渣温度在1400～1550℃，每吨渣含有的显热相当于50～70kg标准煤的热量，中国一年排出转炉钢渣和矿渣近两亿吨，携带热量相当于1000多万吨标准煤。目前高炉矿渣90％以上采用水淬冷却制取水渣，矿渣热量基本全部散失，而且冷却过程中浪费大量水资源。由于成本问题钢渣显热利用率也很低，造成了热能的巨大浪费。充分利用钢渣和矿渣的显热，对实现资源和能源的高效利用、降低钢铁企业的节能降耗具有重要意义。The temperature of steel slag discharged from converter steelmaking is about 1600°C, and the temperature of slag discharged from blast furnace ironmaking is 1400-1550°C. The sensible heat contained in each ton of slag is equivalent to the heat of 50-70kg of standard coal. China discharges converter steel slag and slag a year Nearly 200 million tons, carrying heat equivalent to more than 10 million tons of standard coal. At present, more than 90% of the blast furnace slag is produced by water quenching and cooling, and the heat of the slag is basically lost, and a large amount of water resources are wasted in the cooling process. Due to the cost problem, the sensible heat utilization rate of steel slag is also very low, resulting in a huge waste of heat energy. Making full use of the sensible heat of steel slag and slag is of great significance to realize the efficient utilization of resources and energy and reduce the energy saving and consumption reduction of iron and steel enterprises.
钢渣胶凝活性很低，主要原因是其中的水硬活性矿物含量低，与硅酸盐水泥熟料化学组成相比，钢渣中CaO、SiO2、Al2O3含量较低，Fe2O3含量较高，而矿渣中SiO2、Al2O3含量较高，再加入石灰提高CaO的含量，改性后钢渣的化学组成与硅酸盐水泥熟料成分相近，高温下反应生成的矿物组成也相近，因此可以很好的改善钢渣的胶凝活性。The gelling activity of steel slag is very low, mainly because the content of hydraulically active minerals is low. Compared with the chemical composition of Portland cement clinker, the content of CaO, SiO 2 , Al 2 O 3 in steel slag is low, and Fe 2 O 3 The content of SiO 2 and Al 2 O 3 in the slag is relatively high, and lime is added to increase the content of CaO. The chemical composition of the modified steel slag is similar to that of Portland cement clinker. It is also similar, so it can improve the gelling activity of steel slag very well.
发明内容 Contents of the invention
为了克服上述现有技术的不足，本发明的目的在于提供一种熔融钢渣调质改性处理方法，其能够同时解决钢渣安定性和活性低的问题，工艺简单，成本低廉。In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a quenching and tempering modification treatment method for molten steel slag, which can simultaneously solve the problems of low stability and low activity of steel slag, and has a simple process and low cost.
为了实现上述目的，本发明采用的技术方案是：In order to achieve the above object, the technical scheme adopted in the present invention is:
一种熔融钢渣调质改性处理方法，将转炉炼钢排出的1500～1700℃熔融钢渣倾倒入保温渣包过程中，同时将石灰粉和1400～1550℃的高炉炼铁矿渣作为调质剂加入渣包中，高炉炼铁矿渣的加入量为熔融钢渣总质量的1～50％，石灰粉加入量为钢渣总质量的1～30％。A tempering and modification treatment method for molten steel slag, in which molten steel slag discharged from converter steelmaking at 1500-1700°C is poured into the insulation slag bag process, and lime powder and blast furnace ironmaking slag at 1400-1550°C are added as conditioning agents In the slag ladle, the amount of blast furnace ironmaking slag added is 1-50% of the total mass of molten steel slag, and the amount of lime powder added is 1-30% of the total mass of steel slag.
所述高炉炼铁矿渣的成分及质量范围为：SiO2：25～45％，CaO：30～50％，Al2O3：5～20％，Fe2O3：0.01～5％，MgO：0.01～10％。The composition and mass range of the blast furnace ironmaking slag are: SiO 2 : 25-45%, CaO: 30-50%, Al 2 O 3 : 5-20%, Fe 2 O 3 : 0.01-5%, MgO: 0.01-10%.
所述石灰粉的成分及质量范围为：CaO：90～99.99％，MgO：0.01～10％，粒径为1.0～10mm。The composition and mass range of the lime powder are: CaO: 90-99.99%, MgO: 0.01-10%, and the particle diameter is 1.0-10mm.
所述石灰粉通过气力喷送喷入渣包中。The lime powder is sprayed into the slag bag by pneumatic spraying.
所述调质剂加入渣包后，在当前温度下保温30～60min。After the conditioner is added into the slag bag, it is kept at the current temperature for 30-60 minutes.
调质剂加入渣包过程中，渣包底部鼓入氮气进行搅拌，并持续至保温结束。During the process of adding the conditioning agent into the slag bag, nitrogen gas is blown into the bottom of the slag bag for stirring, and it lasts until the end of the heat preservation.
在热态钢渣处理过程中，加入高炉炼铁产生的热态矿渣和石灰调质剂，不仅能够充分利用钢渣和矿渣的显热，而且可以有效降低钢渣中游离氧化钙含量，改变钢渣成分和矿物组成，改善钢渣胶凝性能，调质后的钢渣化学组成接近硅酸盐水泥熟料，从而大大增加钢渣在水泥混凝土领域的掺加使用量，提高钢渣利用率。In the process of hot steel slag treatment, adding hot slag and lime conditioning agent produced by blast furnace ironmaking can not only make full use of the sensible heat of steel slag and slag, but also effectively reduce the free calcium oxide content in steel slag, change the composition and minerals of steel slag Composition, improve the gelling performance of steel slag, the chemical composition of steel slag after quenching and tempering is close to Portland cement clinker, thus greatly increasing the amount of steel slag added in the cement concrete field and improving the utilization rate of steel slag.
本发明中转炉钢渣和矿渣都来自钢铁企业，调质剂石灰也在钢铁企业大量使用，运输方便，成本低廉，熔融转炉钢渣调质改性处理工艺简单，操作方便，充分利用了钢渣和矿渣的热源，省去了矿渣水淬处理。在保温渣包内钢渣和矿渣、石灰粉充分混合，钢渣中硅酸二钙吸收氧化钙生成硅酸三钙，矿渣的加入促进活性较高的铁相固溶体生成，从而提高了钢渣水硬活性，同时降低了钢渣中氧化铁含量。充足时间的保温使得钢渣中游离氧化钙被充分吸收，消除了钢渣安定性不良对钢渣使用的影响。Both the converter steel slag and slag of the present invention come from iron and steel enterprises, and lime as a conditioning agent is also used in large quantities in iron and steel enterprises. The transportation is convenient and the cost is low. The heat source saves the slag water quenching treatment. The steel slag, slag, and lime powder are fully mixed in the heat preservation slag bag. The dicalcium silicate in the steel slag absorbs calcium oxide to form tricalcium silicate. The addition of slag promotes the formation of a highly active iron phase solid solution, thereby improving the hydraulic activity of the steel slag. At the same time, the content of iron oxide in steel slag is reduced. Sufficient time of heat preservation allows the free calcium oxide in the steel slag to be fully absorbed, eliminating the impact of poor stability of the steel slag on the use of the steel slag.
具体实施方式 Detailed ways
下面结合实施例对本发明做进一步详细说明。The present invention will be described in further detail below in conjunction with the examples.
实施例一Embodiment one
一种熔融钢渣调质改性处理方法，在将转炉炼钢排出的1600℃熔融钢渣倾倒入保温渣包的过程中，同时作为调质剂加入石灰粉和1450℃的高炉炼铁矿渣，高炉炼铁矿渣的加入量为熔融钢渣总质量的10％，石灰粉加入量为钢渣总质量的10％。其中，石灰粉通过气力喷送喷入渣包中，其化学成分及质量百分比为：CaO：90％，MgO：10％，石灰粉的平均粒径为5mm；高炉炼铁矿渣的化学成分及质量百分比为：SiO2：25％，CaO：40％，Al2O3：20％，Fe2O3：5％，MgO：10％。将调质剂加入渣包后，在当前温度下保温60min。调质剂加入渣包过程中，渣包底部鼓入氮气进行搅拌，并持续至保温结束。冷却后得到调质改性钢渣胶凝材料。A quenching and tempering modification treatment method for molten steel slag. During the process of pouring 1600°C molten steel slag discharged from converter steelmaking into the insulation slag bag, lime powder and 1450°C blast furnace ironmaking slag are added as conditioning agents at the same time. The addition amount of iron slag is 10% of the total mass of molten steel slag, and the addition amount of lime powder is 10% of the total mass of steel slag. Among them, lime powder is sprayed into the slag bag by pneumatic spraying, and its chemical composition and mass percentage are: CaO: 90%, MgO: 10%, and the average particle size of lime powder is 5mm; the chemical composition and quality of blast furnace ironmaking slag The percentages are: SiO 2 : 25%, CaO: 40%, Al 2 O 3 : 20%, Fe 2 O 3 : 5%, MgO: 10%. After adding the conditioning agent into the slag bag, keep it warm at the current temperature for 60 minutes. During the process of adding the conditioning agent into the slag bag, nitrogen gas is blown into the bottom of the slag bag for stirring, and it lasts until the end of the heat preservation. After cooling, the quenched and tempered modified steel slag cementitious material is obtained.
实施例二Embodiment two
一种熔融钢渣调质改性处理方法，在将转炉炼钢排出的1600℃熔融钢渣倾倒入保温渣包过程中，同时作为调质剂加入石灰粉和1400℃的高炉炼铁矿渣，高炉炼铁矿渣的加入量为熔融钢渣总质量的8％，石灰粉加入量为钢渣总质量的8％。其中，石灰粉通过气力喷送喷入渣包中，其化学成分及质量百分比为：CaO：95％，MgO：5％，石灰粉的平均粒径5mm；高炉炼铁矿渣的化学成分及质量百分比为：SiO2：40％，CaO：40％，Al2O3：10％，Fe2O3：5％，MgO：5％。将调质剂加入渣包后，在当前温度下保温30min。调质剂加入渣包过程中，渣包底部鼓入氮气进行搅拌，并持续至保温结束。冷却后得到调质改性钢渣胶凝材料。A method for conditioning and modifying molten steel slag. During the process of pouring 1600°C molten steel slag discharged from converter steelmaking into the thermal insulation slag bag, lime powder and 1400°C blast furnace ironmaking slag are added as conditioning agents at the same time. The addition of slag is 8% of the total mass of molten steel slag, and the addition of lime powder is 8% of the total mass of steel slag. Among them, lime powder is sprayed into the slag bag by pneumatic spraying, and its chemical composition and mass percentage are: CaO: 95%, MgO: 5%, and the average particle size of lime powder is 5mm; the chemical composition and mass percentage of blast furnace ironmaking slag It is: SiO 2 : 40%, CaO: 40%, Al 2 O 3 : 10%, Fe 2 O 3 : 5%, MgO: 5%. After adding the conditioning agent into the slag bag, keep it warm at the current temperature for 30 minutes. During the process of adding the conditioning agent into the slag bag, nitrogen gas is blown into the bottom of the slag bag for stirring, and it lasts until the end of the heat preservation. After cooling, the quenched and tempered modified steel slag cementitious material is obtained.
实施例三Embodiment Three
一种熔融钢渣调质改性处理方法，将转炉炼钢排出的1700℃熔融钢渣倾倒入保温渣包过程中，同时作为调质剂加入石灰粉和1500℃的高炉炼铁矿渣，高炉炼铁矿渣的加入量为熔融钢渣总质量的6％，石灰粉加入量为钢渣总质量的7％。其中，石灰粉通过气力喷送喷入渣包中，其化学成分及质量百分比为：CaO：99％，MgO：1％，石灰粉的平均粒径5mm；高炉炼铁矿渣的化学成分及质量百分比为：SiO2：35％，CaO：50％，Al2O3：5％，Fe2O3：3％，MgO：7％。将调质剂加入渣包后，在当前温度下保温40min。调质剂加入渣包过程中，渣包底部鼓入氮气进行搅拌，并持续至保温结束。冷却后得到调质改性钢渣胶凝材料。A tempering modification treatment method for molten steel slag, pouring 1700°C molten steel slag discharged from converter steelmaking into the thermal insulation slag bag process, and adding lime powder and 1500°C blast furnace ironmaking slag as a conditioning agent at the same time, blast furnace ironmaking slag The addition amount is 6% of the total mass of molten steel slag, and the addition amount of lime powder is 7% of the total mass of steel slag. Among them, lime powder is sprayed into the slag bag by pneumatic spraying, and its chemical composition and mass percentage are: CaO: 99%, MgO: 1%, and the average particle size of lime powder is 5mm; the chemical composition and mass percentage of blast furnace ironmaking slag It is: SiO 2 : 35%, CaO: 50%, Al 2 O 3 : 5%, Fe 2 O 3 : 3%, MgO: 7%. After adding the conditioning agent into the slag bag, keep it warm at the current temperature for 40 minutes. During the process of adding the conditioning agent into the slag bag, nitrogen gas is blown into the bottom of the slag bag for stirring, and it lasts until the end of the heat preservation. After cooling, the quenched and tempered modified steel slag cementitious material is obtained.
实施例四Embodiment Four
一种熔融钢渣调质改性处理方法，将转炉炼钢排出的1550℃熔融钢渣倾倒入保温渣包过程中，同时作为调质剂加入石灰粉和1550℃的高炉炼铁矿渣，高炉炼铁矿渣的加入量为熔融钢渣总质量的25％，石灰粉加入量为钢渣总质量的20％。其中，石灰粉通过气力喷送喷入渣包中，其化学成分及质量百分比为：CaO：97％，MgO：3％，石灰粉的平均粒径10mm；高炉炼铁矿渣的化学成分及质量百分比为：SiO2：40％，CaO：35％，Al2O3：20％，Fe2O3：1％，MgO：4％。将调质剂加入渣包后，在当前温度下保温60min。调质剂加入渣包过程中，渣包底部鼓入氮气进行搅拌，并持续至保温结束。冷却后得到调质改性钢渣胶凝材料。A method for conditioning and modifying molten steel slag. The 1550°C molten steel slag discharged from converter steelmaking is poured into the insulation slag bag process, and at the same time, lime powder and 1550°C blast furnace ironmaking slag and blast furnace ironmaking slag are added as a conditioning agent The addition amount of the lime powder is 25% of the total mass of molten steel slag, and the addition amount of lime powder is 20% of the total mass of steel slag. Among them, lime powder is sprayed into the slag bag by pneumatic spraying, and its chemical composition and mass percentage are: CaO: 97%, MgO: 3%, and the average particle size of lime powder is 10mm; the chemical composition and mass percentage of blast furnace ironmaking slag It is: SiO 2 : 40%, CaO: 35%, Al 2 O 3 : 20%, Fe 2 O 3 : 1%, MgO: 4%. After adding the conditioning agent into the slag bag, keep it warm at the current temperature for 60 minutes. During the process of adding the conditioning agent into the slag bag, nitrogen gas is blown into the bottom of the slag bag for stirring, and it lasts until the end of the heat preservation. After cooling, the quenched and tempered modified steel slag cementitious material is obtained.
实施例五Embodiment five
一种熔融钢渣调质改性处理方法，将转炉炼钢排出的1700℃熔融钢渣倾倒入保温渣包过程中，同时作为调质剂加入石灰粉和1450℃的高炉炼铁矿渣，高炉炼铁矿渣的加入量为熔融钢渣总质量的50％，石灰粉加入量为钢渣总质量的30％。其中，石灰粉通过气力喷送喷入渣包中，其化学成分及质量百分比为：CaO：92％，MgO：8％，石灰粉的平均粒径1mm；高炉炼铁矿渣的化学成分及质量百分比为：SiO2：40％，CaO：40％，Al2O3：15％，Fe2O3：1％，MgO：4％。将调质剂加入渣包后，在当前温度下保温60min。调质剂加入渣包过程中，渣包底部鼓入氮气进行搅拌，并持续至保温结束。冷却后得到调质改性钢渣胶凝材料。A tempering modification treatment method for molten steel slag, pouring 1700°C molten steel slag discharged from converter steelmaking into the thermal insulation slag bag process, and adding lime powder and 1450°C blast furnace ironmaking slag as a conditioning agent at the same time, blast furnace ironmaking slag The addition amount of the lime powder is 50% of the total mass of molten steel slag, and the addition amount of lime powder is 30% of the total mass of steel slag. Among them, lime powder is sprayed into the slag bag by pneumatic spraying, and its chemical composition and mass percentage are: CaO: 92%, MgO: 8%, and the average particle size of lime powder is 1mm; the chemical composition and mass percentage of blast furnace ironmaking slag It is: SiO 2 : 40%, CaO: 40%, Al 2 O 3 : 15%, Fe 2 O 3 : 1%, MgO: 4%. After adding the conditioning agent into the slag bag, keep it warm at the current temperature for 60 minutes. During the process of adding the conditioning agent into the slag bag, nitrogen gas is blown into the bottom of the slag bag for stirring, and it lasts until the end of the heat preservation. After cooling, the quenched and tempered modified steel slag cementitious material is obtained.
实施例六Embodiment six
一种熔融钢渣调质改性处理方法，将转炉炼钢排出的1700℃熔融钢渣倾倒入保温渣包过程中，同时将石灰粉和1500℃的高炉炼铁矿渣作为调质剂加入渣包中，高炉炼铁矿渣的加入量为熔融钢渣总质量的6％，石灰粉加入量为钢渣总质量的7％。其中，石灰粉通过气力喷送喷入渣包中，其化学成分及质量百分比为：CaO：99％，MgO：1％，石灰粉的平均粒径5mm；高炉炼铁矿渣的化学成分及质量百分比为：SiO2：35％，CaO：50％，Al2O3：5％，Fe2O3：3％，MgO：7％。将调质剂加入渣包后，在当前温度下保温60min。调质剂加入渣包过程中，渣包底部鼓入氮气进行搅拌，并持续至保温结束。冷却后得到调质改性钢渣胶凝材料。A method for conditioning and modifying molten steel slag. The 1700°C molten steel slag discharged from converter steelmaking is poured into the insulation slag bag process, and at the same time, lime powder and 1500°C blast furnace ironmaking slag are added into the slag bag as conditioners. The addition amount of blast furnace ironmaking slag is 6% of the total mass of molten steel slag, and the addition amount of lime powder is 7% of the total mass of steel slag. Among them, lime powder is sprayed into the slag bag by pneumatic spraying, and its chemical composition and mass percentage are: CaO: 99%, MgO: 1%, and the average particle size of lime powder is 5mm; the chemical composition and mass percentage of blast furnace ironmaking slag It is: SiO 2 : 35%, CaO: 50%, Al 2 O 3 : 5%, Fe 2 O 3 : 3%, MgO: 7%. After adding the conditioning agent into the slag bag, keep it warm at the current temperature for 60 minutes. During the process of adding the conditioning agent into the slag bag, nitrogen gas is blown into the bottom of the slag bag for stirring, and it lasts until the end of the heat preservation. After cooling, the quenched and tempered modified steel slag cementitious material is obtained.
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Cited By (8)
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| CN106045347A (en) * | 2016-06-02 | 2016-10-26 | 辽宁科技大学 | Method for melting and digesting free calcium oxide in converter slag |
| CN107081432A (en) * | 2017-04-26 | 2017-08-22 | 阜阳市鑫源建材有限公司 | A kind of method that direct powdered of melted gangue metal prepares 3D printing raw material |
| CN107475468A (en) * | 2017-08-22 | 2017-12-15 | 东北大学 | A kind of method of Spinel growth behavior in regulation and control stainless steel slag |
| CN111018388A (en) * | 2019-12-31 | 2020-04-17 | 常州坚鹏建材有限公司 | High-performance mineral admixture and application thereof in concrete |
| CN113087420A (en) * | 2021-03-17 | 2021-07-09 | 张文 | Stokehole modified steel slag and preparation method thereof |
| CN113698115A (en) * | 2021-10-20 | 2021-11-26 | 盐城工学院 | Active auxiliary cementing material and method for on-line tempering of steel slag |
| CN114057403A (en) * | 2021-11-29 | 2022-02-18 | 西安热工研究院有限公司 | A kind of modification and tempering method of double U-shaped liquid slag discharge boiler slag liquid |
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| CN106045347A (en) * | 2016-06-02 | 2016-10-26 | 辽宁科技大学 | Method for melting and digesting free calcium oxide in converter slag |
| CN106045347B (en) * | 2016-06-02 | 2018-03-30 | 辽宁科技大学 | A kind of method for melting free calcium oxide in resolution converter slag |
| CN107081432A (en) * | 2017-04-26 | 2017-08-22 | 阜阳市鑫源建材有限公司 | A kind of method that direct powdered of melted gangue metal prepares 3D printing raw material |
| CN107475468A (en) * | 2017-08-22 | 2017-12-15 | 东北大学 | A kind of method of Spinel growth behavior in regulation and control stainless steel slag |
| CN107475468B (en) * | 2017-08-22 | 2019-03-12 | 东北大学 | A kind of method of Spinel growth behavior in regulation stainless steel slag |
| CN111018388A (en) * | 2019-12-31 | 2020-04-17 | 常州坚鹏建材有限公司 | High-performance mineral admixture and application thereof in concrete |
| CN111018388B (en) * | 2019-12-31 | 2021-09-17 | 常州坚鹏建材有限公司 | High-performance mineral admixture and application thereof in concrete |
| CN113087420A (en) * | 2021-03-17 | 2021-07-09 | 张文 | Stokehole modified steel slag and preparation method thereof |
| CN113698115A (en) * | 2021-10-20 | 2021-11-26 | 盐城工学院 | Active auxiliary cementing material and method for on-line tempering of steel slag |
| CN114057403A (en) * | 2021-11-29 | 2022-02-18 | 西安热工研究院有限公司 | A kind of modification and tempering method of double U-shaped liquid slag discharge boiler slag liquid |
| CN116970765A (en) * | 2023-07-19 | 2023-10-31 | 天津水泥工业设计研究院有限公司 | Modifier for preparing cast steel shot by adopting reconstructed molten steel slag and process |
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