Passivation behavior of reinforcement in simulated pore …
The steel slag and ground granulated blast furnace slag with high fineness exhibit synergistic effects on hydration progress and can be introduced into concrete in high volume. In this paper, the simulated pore solution (SPS) of ternary cement incorporating ultrafine steel slag (US) and ultrafine ground granulated blast furnace slag (UG) was ...
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Slag-Forming in Blast Furnace Ironmaking
A suitable slag composition was found to satisfy the smelting process in a blast furnace with super-high TiO2 content at low temperature by using more MgO and …
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Influence of TiO2, Al2O3, and Basicity on Viscosity and …
High titanium-bearing blast furnace slag is the main type of blast furnace slag produced by vanadium and titanium ore in the Panzhihua area during blast …
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Effect of ground granulated blast-furnace slag (GGBS) and
Palou et al. [16] reported that the lower content (<40 %) of slag did not slow down the hydration rate at high temperatures, and it still underwent hydration reactions at later times. Wang et al. [ 17 ] found that GGBS, fly ash, and steel slag could improve the strength of cement concrete at 60 °C through the consumption of Ca(OH) 2 .
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Comprehensive utilisation of blast furnace slag
Steel slag mainly refers to the blast furnace slag and converter slag produced in the process of iron making and steel making, and with the increase of steel …
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Crystallization enhancement and microstructure evolution
Ti-bearing blast furnace slag (TBS) is produced from vanadium-titanium magnetite ore smelting during the blast furnace process. In China, the total accumulated amount of TBS was more than 70 million tons up to 2017. Approximately 3.6 million tons of TBS are currently produced per year [1, 2]. Such huge storage and production yields …
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Modification of phase evolution in alkali-activated blast furnace slag
The use of slag and fly ash together to form an alkali-activated binder will generally lead to formation of a high amount of tetracoordinated Al charge-balanced by Na, and binder gels in the hydrated Na 2 O–CaO–Al 2 O 3 –SiO 2 system. The nature of the main type of gel formed when both precursors are activated depends on various factors …
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Qiang ZHONG | Central South University, Changsha | CSU
Different vanadiferous titanomagnetites commonly show different sintering performance and the underlying reason is the difference in mineralization behavior. ... Slag of gold-antimony ore blast ...
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Study on the High-temperature Properties of High
Blast furnace operation is a complex phenomenon; maximising productivity requires a balance of burden characteristics. Meeting the targets of optimum sinter strength and minimum slag volume is a … Expand
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Redox, extraction of iron and transition metals Extracting iron
Iron is extracted from iron ore close ore A rock containing enough quantities of a mineral for extraction to be possible. in a huge container called a blast furnace. Iron ores such as haematite ...
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Sintering mechanism of blast furnace slag–kaolin ceramics
Slag contents in the kaolin–slag mixture varied from to 90%, 70% and 50% by weight, and given in Table 2.Mixtures were homogenized in ball mill for 3 h, using a plastic container and highly pure alumina spheres, at 250 cycles/min. Compacts were obtained from powders humidified with 6 wt.% distilled water by cold pressing at 60 …
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Behavior of vanadium during reduction and smelting of …
(in Chinese) [24] YANG Su-bo, LUO Ze-zhong, CAI Kai-ke, JIANG Jun-pu, SONG Bo. Thermodynamic study on distribution of vanadium between iron melt and slag in basic oxygen furnace [J]. Iron Steel, 2006, 41: 36âˆ'38. (in Chinese) [25] NAN Xiang-min. Study on vanadium oxide reduction in blast furnace hearth [J]. Zhuzao Jishu, 2013, 34: …
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How blast rate variation affects dynamic in-furnace …
The blast furnace (BF) is the most energy-consuming and important reactor in ironmaking industries at present (i.e., conventional BFs) and in the near term (i.e., novel BFs) [1].In the BF process, iron ore and coke are loaded alternately at the furnace top, and hot blast is introduced into the lower part of the furnace along the circumference …
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Co-carbonation behaviors of blast furnace ferronickel slag …
Blast furnace ferronickel slag (BFNS) has the potential to sequester CO 2 for building materials. This study used cement to enhance reactivity of BFNS and found that cement can not only improve the CO 2 capture ability of BFNS via stimulating the carbonation of Mg, but also stabilize the formed carbonation products. Co-carbonation of …
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Slag-ing phenomenon originating from reaction of …
The ing phenomenon of high-titanium blast furnace slag was also monitored in real-time by using an experimental device. A series of high-temperature experiments verified the feasibility and reproducibility of the monitoring device used in this study. It is proved that the electric method used in this study to monitor the slag-ing ...
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Failure mechanisms of blast furnace tuyeres and mitigation …
Iron blast furnace is a gigantic counter-current reactor and contributes to the majority of ∼1.8 billion tonnes of steel produced annually. Among various components of …
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Determination of Blast-Furnace Slag Content in Hardened …
Author: Irene K. LaBarca Publisher: ISBN: Category : Portland cement Languages : en Pages : 98 Download Book. Book Description This research examined the properties of concrete containing grade 120 slag cement at replacement levels of 0%, 30%, and 50%.
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Novel CO2 Recycling and Reuse Strategy: Reinjection of …
Metallurgical Off‑Gas Into A Vanadiferous Titanomagnetite Ore Blast ... Fig. 1 a Softening-–melting–dripping furnace. b Slag melting test furnace. Journal of Sustainable Metallurgy (2021) 7:1128–1142 1131 ... GB/T 34,211–2017 (Table 2). This study is mainly based on blast furnace gas (BFG) and basic oxygen furnace gas (BOFG) to study ...
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Experimental study on flow properties of blast furnace slag …
This paper established a novel visualization method for measuring blast furnace slag(BFS) flow properties and investigated the effect of alumina content on the CaO–SiO2–Al 2 O 3 –MgO BFS system. The outcomes indicate that elevating Al 2 O 3 concentration in the BFS mixture from 14% to 26% results in a rise of critical flow …
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Pyrometallurgical Processing of Vanadiferous Slag Using
In this production of ferrovalludium from slag were investigated. process, vanadium-containing hOI metal is treated using a The composition of vanadiferous slags appears to vary controlled oxygen blow to oxidize vanadium into a slag. considerably depending on source. but generally ranges Vanadiferous slags are an internationally traded ...
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Improvement of Early Strength of Cement Mortar Containing …
More recently, High-volume Blast Furnace Slag Cement (HBFSC), whose GBFS content is heightened to 60–70% by applying a cutting-edge technology, is being used for the reduction of the heat of hydration and improvement of seawater and chemical resistance performances . However, GBFS-mixed concrete also has certain …
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Waste heat recovery of blast furnace slag considering …
1. Introduction. BFS (Blast Furnace Slag) constitutes the primary solid co-product of the steel manufacturing process. In the Blast Furnace-Basic Oxygen Furnace process, each ton of crude steel yields approximately 275 kg of BFS [1].From an energy perspective, BFS can be discharged at temperatures up to 1550 °C [2], containing a substantial amount of …
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Physical and Chemical Characteristics of Blast Furnace, Basic …
Approximately 21 million tons of steel industry slag are produced each year in the United States, and many productive commercial uses of slag have been …
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Hanlin SONG | PhD Student | Doctor of Engineering
It is inevitable to encounter the slag thicker, ing slag, and high iron loss due to the excessive formation of titanium carbonitride in the blast furnace (BF) smelting of full high Cr ...
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Reactivity of blast-furnace slag in Portland cement blends …
The increased slag reactivity with higher temperatures is a commonly reported feature of blast furnace slag [6], [7], [13]. With regards to the water available for the reactions, it can be noted in Fig. 2 that the slag reactivity was also increased at higher w/s, compare curves A–B and B–D.
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Study on the High-temperature Properties of High-titania …
The high-temperature metallurgical property of high-titania slag is one of the most significant indicators to measure the production status of Cr-bearing vanadia-titania magnetite blast furnace ...
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A review of high-temperature experimental techniques used …
The softening and melting (S&M) under load test is widely used as a laboratory-scale routine test to investigate the behaviour of ferrous burden materials in the cohesive zone (CZ). However, it has been more than 30 years since the last comprehensive review and over that time, operational conditions in large, high-production blast furnaces (BFs) …
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Novel CO2 Recycling and Reuse Strategy: Reinjection of Hot
A sustainable strategy of reinjecting hot MOG as one of the raw materials into the Cr-bearing vanadiferous titanomagnetite ore (CVTO) blast furnace (BF) to achieve its recovery and reuse was proposed and investigated in this study. ... The melting temperature of the titania slag decreased from 1348.2 to 1331.2 °C, and its surface tension ...
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Novel CO2 Recycling and Reuse Strategy: Reinjection of Hot
A sustainable strategy of reinjecting hot MOG as one of the raw materials into the Cr-bearing vanadiferous titanomagnetite ore (CVTO) blast furnace (BF) to achieve its recovery and reuse was proposed and investigated in this study. ... it also improved the high-temperature properties of the titania slag. The melting temperature of the titania ...
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Mechanoactivated Mineral Compositions Based on Portland …
Preliminary results showed that the introduction of up to 20% blast-furnace dump slag changes the rheological and physical–mechanical characteristics of stone significantly into composite cement formulation both intergrinding and mixing of pre-dispersed components.
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CO2 injection improves the high-temperature
DOI: 10.1016/j.jcou.2020.101363 Corpus ID: 228979237; CO2 injection improves the high-temperature performances of Cr-bearing vanadia-titania magnetite smelting in blast furnace
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Effects of granulated blast furnace slag and superplasticizer …
This paper presents the results of an experimental investigation carried out to study the effect of granulated blast furnace slag and two types of superplasticizers on the properties of self-compacting concrete (SCC). In control SCC, cement was replaced with 10%, 15%, 20%, and 25% of blast furnace slag.
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Preparation and blast furnace slag corrosion behavior of SiC–Sialon–ZrN
Thus, they are widely applied, especially as blast furnace (BF) refractories (a critical and dominating factor in the quality of iron smelting and also the lifespan of blast furnace) [1], [2], [3]. As the matrix in Sialon–SiC composite refractories, Sialon has mostly been prepared using Si, Al, Al 2 O 3 and/or Si 3 N 4 powders as raw ...
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Influence of the pozzolanic reactivity of the Blast Furnace Slag …
The blast furnace slag was recovered from the steel plant in El Hadjar (Annaba, Algeria). The cement used is CEM1- 42.5. Their properties, chemical analysis, BET and D50 are shown in Table 1. Normal mortar called also standard mortar (1/3 liant â€" 2/3 sand) used for the compression tests part, is prepared according to the standard NF …
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A comprehensive study on the impact of nano-silica and …
To make HSC, it was important to use the high-quality materials complying with standard specifications ASTM C33 [31].Therefore, Portland Cement (PC) was found from local market having density of 1440 kg/m 3, ignition loss of 2.45% and fineness of 3.33%.However, the ground granulated blast furnace slag (GGBFS) was utilized as …
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Passivation behavior of reinforcement in simulated pore …
Steel slag (SS) and ground granulated blast furnace slag (GGBFS) are the main solid wastes produced in the steelmaking industry [1].It was reported that China's crude steel production has reached 1,035 million tons in 2022, which exceeds half of the world's total crude steel output (1,951 million tons) [2].Correspondingly, the SS and …
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Kinetics of Smelting Chromia–Bearing Vanadiferous
However, due to the special nature of CVTO blast furnace smelting, under the combined action of coke and nitrogen in the injected air, the titanium dioxide in the samples is easily over–reduced to high melting point titanium carbonitride, which will cause the viscosity of the molten slag to increase sharply, even slag bubbling, difficulty in ...
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Unlocking the potential: A comprehensive review on blast …
The most considerable solid waste generated in the iron and steel industry is BFS, and the rational utilization of BFS can reduce environmental pollution and energy consumption [13].Traditionally, blast-furnace slag has been used for construction materials and …
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Chemical composition of sinter and iron ore
Meeting the targets of optimum sinter strength and minimum slag volume is a matter of concern for high alumina (2·0–2·1%) iron ore fines. ... For blast furnace smelting vanadiferous ...
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Variation in hot metal and slag composition during tapping …
To determine the quality of the hot metal and the thermal conditions inside the blast furnace, the composition of the hot metal and slag must be known. Obtaining …
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