粘性物料对混匀矿生产的影响及控制实践

随着公司降低配矿成本及提高TFe品位的需要,混匀矿中开始逐步增加精矿粉及厂内回收的杂副原料量,此类粘性物料的配入会引起取料机取料台时低、溜槽堵塞溢料、BH易闷槽及斗轮皮带易压料等一系列问题,导致混匀矿在造堆、输出时故障率持续攀升,制约了混匀矿的生产与输出。原料厂通过改造,解决了相关问题,有效保证了混匀矿生产工艺的顺行,提高了杂副原料和精矿粉在混匀矿大堆中的用量。

重钢新区提高混匀矿质量的实践

重钢新区混匀料场自投产以来，通过采取一系列措施，提高了混匀矿的产量和质量，满足了烧结对原料的需求。

Φ3.6 m×14 m实心胶轮传动圆筒混合机在冶金企业中的应用优势

结合河南某冶炼厂混矿生产的特点,对Φ3.6 m×14 m圆筒混合机的齿轮传动、实心胶轮传动和充气轮胎传动等三种传动方式的结构和特点进行对比分析。经过综合分析,实心胶轮传动圆筒混合机在这种混矿生产中具有运行稳定、振动小、噪声低、初期投资少、制造周期短、运行成本低、故障率低、维修简单、节能等优点。

Influence of Mineral Admixtures on Essential Properties of Ternary Cement Blends

Two CaCO3-based materials （limestone and clamshells） and steel slag were used as mineral admixtures in cement to produce ternary blends and their influences on hydration and portlandite formation were analyzed. Additionally, mechanical properties were determined. These properties were determined using X-ray diffraction and scanning electron microscopic/energy dispersive X-ray analytical techniques as well as applying methods specified by EN （European Standards） and ASTM （American Standards for Testing and Materials）. The portlandite （Ca（OH）E） content was considerably reduced from 36.9% of reference cement to between 13.79% and 15.5%. With the water demand and setting times of the cements containing up to 10%, admixtures did not change significantly. The mechanical tests results showed that ternary blends produced 2-day strengths higher than that specified by EN 197-1 and that blends containing up to 20% admixtures can be used to produce both Class 32.5N and 42.5N cements.