耐火材质挡渣帽的研制

本文主要叙述了纯氧顶吹转炉采用炉外精炼设备后,其冶炼钢种日趋发展。为了充分发挥炉外精炼的效果,必须要挡好一次渣。从挡一次渣不良的现状,提出了耐火材质挡渣帽的研制。通过合理的选择材料,探索良好的成型工艺,研制出理想产品,并获得试用良好的效果。

烧成铝碳质滑动水口的研究

本文叙述了选材的理论依据,产品的制造方法及性能指标.讨论了某些工艺因素对合成铝碳材料性能的影响.该产品不仅强度高,耐侵蚀、抗冲刷、热稳定性能好,而且启闭自如,不粘铜、不挂渣、能够适应多炉连铸的需要.是一种较为理想的滑动水口材料.

铬刚玉狭缝型透气砖及座砖在60t钢包上的应用

介绍了在６０ｔ钢包包底吹氩中，采用铬刚玉狭缝型透气砖及高纯高强度氧化铝质浇注成型整体座砖代替高铝弥散型透气砖及一级高铝分体座砖，实现了透气砖及座砖使用与包衬寿命同步，且透气孔不堵塞，不需工人每炉用氧气清扫，重复吹开率达１００％，增加了生产上的安全可靠性。

Effective Use of Cement for Modification of Base Course Material

Cement improves properties of soil materials, such as durability, stiffness, strength and moisture susceptibility. Each of them needs different cement contents that might not be suitable for other properties. Typically, high cement content is desirable for durability, but not for shrinkage and cracking issues on the surface. Thus, improving durability with low cement content while complying with other requirements is an ideal aim, which may be achieved by pozzolanic supplementary products. Pozzolans contribute in hydration reactions and optimise cement consumptions in favour of durable and low shrinkage products. In this paper, the mixes of nano-silica and fly ash are considered to investigate their effect on strength, durability and shrinkage of modified CRB （crushed rock base） material. In the end, the benefits and features of nano-silica as a pozzolanic material will be focused and discussed more for effective cement consumption in soils.