ABSTRACT

The addition of pellet binders often represents a compromise between the pellet grade and quality measures as strength, reducibility, and dustiness. Each inorganic compound present within the pellet plays a specific role in each aspect of creating a high-quality pellet. This review seeks to clarify the roles of both binders and coincidentally present inorganic compounds to highlight the interconnected nature of the pelletization process. The goals stemming from the final reduction process are drawn back through the pelletization process to present a clear rationale for why each material can be used to control the pellet quality. Major inorganic binders such as bentonite, colemanite, and lime are examined along with less commonly used alternatives. Each of these binders has specific interactions with common components of the pellet composition, including common ions in water chemistry such as calcium and magnesium. Additionally, major advances in understanding the formation of pellets utilizing inorganic binders are highlighted, such as differential scanning calorimetry to predict sintering heat requirements, roll-press mixing to improve the dispersion of clay binders, and cold bonding techniques as an alternative to sintering.

摘要

添加颗粒粘合剂通常代表颗粒等级和质量测量（如强度、可还原性和含尘量）之间的折衷。颗粒中存在的每种无机化合物在制造高质量颗粒的各个方面都发挥着特定的作用。本综述旨在阐明粘合剂和同时存在的无机化合物的作用，以突出造粒过程的相互关联性。源自最终还原过程的目标在造粒过程中被拉回，为每种材料可用于控制颗粒质量的原因提供了一个清晰的理由。主要无机粘合剂如膨润土、硬硼钙石和石灰与不太常用的替代品一起被检查。这些粘合剂中的每一种都与颗粒组合物的常见成分具有特定的相互作用，包括水化学中的常见离子，例如钙和镁。此外，还强调了在理解利用无机粘合剂形成颗粒方面的重大进展，例如差示扫描量热法预测烧结热需求、辊压混合以改善粘土粘合剂的分散，以及冷粘合技术作为烧结的替代方法。