文章信息/Info

Title:

Recent Progress on Low-Carbon MgO-C Refractories

文章編號:

1674-3962(2020)07-0609-09

作者:

朱天彬; 李亞偉; 桑紹柏

（1. 武漢科技大學 省部共建耐火材料與冶金國家重點實驗室，湖北 武漢 430081）（2. 武漢科技大學 高溫材料與爐襯技術國家地方聯(lián)合工程研究中心，湖北 武漢 430081)

Author(s):

ZHU Tianbin;  LI Yawei;  SANG Shaobai

(1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China) （2. National�睵rovincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan 430081, China)

關鍵詞:

鎂碳耐火材料; 納米碳源; 原位陶瓷相; 結合劑; 抗熱震性; 力學性能

Keywords:

MgO-C refractories;  nano carbon sources;  in-situ formed ceramic phases;  binders;  thermal shock resistance;  mechanical properties

分類號:

TQ175

DOI:

10.7502/j.issn.1674-3962.202005001

文獻標志碼:

A

摘要:

鎂碳耐火材料因其中含鱗片石墨等碳組分而具有優(yōu)異的抗熱震性和抗高溫熔渣侵蝕能力，被廣泛用作鋼鐵冶煉用轉爐、電爐、鋼包等爐襯材料。為滿足潔凈鋼冶煉技術、鋼鐵冶金節(jié)能減排、資源高效利用的需求，鎂碳耐火材料的低碳化具有重要的現(xiàn)實意義。然而，單純地降低鎂碳耐火材料中鱗片石墨的含量，勢必會造成材料高溫使用性能下降，尤其是抗熱震性下降。為此，近年來國內外研究者主要從碳源的選擇、結合劑的改性、抗氧化劑的優(yōu)化和原位形成陶瓷相的控制等方面開展了大量卓有成效的工作。主要從納米結構基質的構筑、結合劑碳結構的優(yōu)化及外加劑的引入與陶瓷相的調控出發(fā)，綜述了國內外低碳化鎂碳耐火材料的研究進展，提出了高強韌復合化/輕量化鎂質骨料的制備、新型抗氧化劑的研發(fā)及不同抗氧化技術的結合使用、復合納米碳/陶瓷相協(xié)同強韌化的調控、含納米碳復合粉體的制備以及鱗片石墨替代材料的選擇等發(fā)展方向，期望為低碳化鎂碳耐火材料的研究和工業(yè)應用提供參考。

Abstract:

MgO-C refractories are widely used as the lining materials in steelmaking industries such as basic oxygen furnace, electric arc furnaces and steel ladles owing to their excellent thermal shock resistance and corrosion resistance originated from the presence of flake graphite and other carbon sources. In order to meet the requirements of clean steel smelting, low carbon society and effective usage of resources, it is greatly important to develop low-carbon MgO-C refractories. Nevertheless, the high temperature performance (especially thermal shock resistance) will be decreased significantly when the content of flake graphite in MgO�睠 refractories is reduced. Therefore, much effort based on the selection of carbon sources, modification of binders, optimization of antioxidants and control of in�瞫itu formed ceramic phases was performed to improve the properties of the refractories in the past 20 years. In this review, the recent progress on low-carbon MgO-C refractories is summarized, and the future investigation work including the fabrication of composite/lightweight magnesia-based aggregates with high strength and toughness, the development of new antioxidants, the combined utilization of different antioxidation techniques, the control of synergistic strengthening and toughening of composite nano-carbon/ceramic phase, the preparation of composite powders containing nano-carbon and the selection of flake graphite substitute materials is also proposed, with the aim to provide the guidance for the development and application of low-carbon MgO-C refractories.