杭钢使用南非矿粉前后的配矿调整

南非矿是广大烧结工作者认可的高品质、易烧结的铁矿原料，经常在烧结生产中被当作“烧结味精”来改善烧结料的烧结性能。分析了杭钢配矿结构中使用0％～8％的南非矿粉对烧结矿产质量指标的变化，及停用南非矿粉后的配矿结构调整，认识南非矿粉在烧结中的作用。     

配加进口矿粉烧结矿的冶金性能

本文论述了在杭钢条件下配加南非和巴西粉烧结矿的冶金性能，提出了配加南非和巴西矿粉对烧结矿冶金性能的影响及合理的配矿比。     

南非矿粉对烧结矿性能的影响

1 前言目前武钢烧结厂由于澳矿粉失调,为保证高炉入炉烧结矿的铁分,在一、二、三烧不同时期分别加入南非矿粉进行烧结。为配合高炉生产,我们对加入的南非矿粉的烧结矿取样进行了研究。2 南非矿粉烧结矿中用量配比(见表1)     

南非矿粉烧结性能试验研究

本文从实验室试验角度，阐述了南非矿粉具有良好的物化性能和烧结性能。与澳矿粉对比，其烧结利用系数和转鼓强度指标具有一定的优越性。     

钒钛矿粉与进口矿粉的熔融特性比较

随着进口矿粉的限制条件趋紧以及价格上涨，国内矿粉对粗钢产量的贡献率逐年提高，而针对我国攀西地区丰富的钒钛磁铁矿资源的高效开发利用受到钢铁企业的关注。本文以软化温度、半球温度、流动温度和软化区间等熔融特性指标值来近似描述矿粉的液相形成和流动特征，并采用自主研发的微型烧结和矿粉熔融特性测定装置，在约束SiO₂质量分数和碱度(二元碱度为2.0)的条件下，进行混合钒钛矿粉与4种进口矿的熔融特性指标检测，并采用相图分析和互配试验比较钒钛矿粉与进口矿粉的熔融特性。结果表明：不同种类铁矿粉的熔融特性指标各异，黑谷田、瑞禾和百草粉3种钒钛矿粉的软化温度均不高于1 350℃,半球温度、流动温度均不高于1 410、1 490℃,较有利于低温烧结生产；由15%黑谷田粉+55%瑞禾粉+30%百草粉配制成的混合钒钛矿粉的软化温度、半球温度、流动温度、软化区间分别为1 332.5、1 382.5、1 470.5、138℃;澳矿1、2配入对钒钛混合粉的熔融特性有利；当智利矿粉配比超过20%或巴西矿粉超过50%时，混合矿粉的液相生成困难、流动性变差，对烧结矿质量带来负面影响。将一种固定的混合钒钛...     

太钢使用印度果阿矿粉的烧结试验及生产

介绍了太钢烧结配加印度果阿矿粉的烧结试验,实验室试验和工业试验结果表明,印度果阿矿粉的烧结性能及冶金性能与Ｈ．Ｉ矿粉相关不大,适用于太钢烧结生产,同时本文还对烧结使用果阿矿粉的适宜条件进行了初步分析。     

罗伊山矿粉烧结试验研究

针对一种新矿粉-罗伊山矿粉的烧结性能进行了研究。研究结果表明,罗伊山粉的同化性较高,高温下液相流动性较好,与澳粉的高温特性接近,故可以与澳粉进行互相替代,与巴卡粉互补搭配。以此为基础对罗伊山矿粉的配矿方案进行了烧结杯试验。最后,工业生产实践证明,烧结配加5%~10%的罗伊山粉后,烧结运作良好。但从综合性价比上看,当前条件下京唐配加比例在5%较为适宜。     

配加莫桑比克矿粉烧结

本文介绍了在烧结料中配加莫桑比克矿粉的烧结生产情况。技术指标及烧结矿的矿物结构和冶金性能试验表明：莫桑比克矿粉是良好的烧结原料。     

配用加拿大矿粉的烧结试验研究

通过对铁矿粉基础性能进行研究,比较了加拿大矿粉与其他5种矿粉的理化性能和高温烧结特性。依据基础研究结果进行了烧结杯试验,研究配用17％～25％加拿大矿粉的烧结指标变化和搭配矿粉的配比调节范围,得到烧结指标好的加拿大矿粉配用比例和使用方案。结果表明：加拿大矿粉配比在21％左右,火箭A粉配比在30％以下时,烧结矿性能指标较优。     

凌钢配加澳矿粉烧结生产实践

为了解决“四合一”供应量大幅度减少所带来的烧结矿减产问题,于１９９９年开始在烧结混合料中配加澳矿粉,配加澳矿粉后将会对烧结矿产,质量及高炉冶炼带来多大影响？本文依据实际生产数据进行了分析。     

南非粉铬矿球团烧结工艺与技术装备简述

分析了当前世界铬矿生产以及南非铬铁生产的发展趋势,着重阐述了南非普遍采用的奥托昆普球团烧结工艺流程与技术装备的特点,其工艺先进,装备可靠,自动化程度高,回收处理系统完善。     

进口矿粉在韶钢的使用

本文介绍了韶钢配加澳矿和南非矿烧结生产的情况，结果表明，澳矿和南非矿均为良好的烧结原料，澳矿和南非矿的最佳配比都是１５％，南非矿更适合于韶钢烧结。     

烧结矿优化配矿试验研究

针对宏阳钢铁公司现有的原燃料条件,引进南非矿粉,用试验的方法对烧结矿配矿进行了研究.通过对多种配矿方案的比较,找到了各种原燃料的定量搭配关系,为实际烧结生产提供了依据.     

南非粉矿的烧结试验研究

对外购南非KUMBA公司Sishen矿山的粉矿进行了物相和理化性能的分析，以及烧结性能和烧结矿冶金性能的研究，并与武钢使用的其他进口粉矿进行了比较，通过试验找出了该矿的烧结特性和适宜的工艺参数。     

Understanding the Agglomeration Behavior of Selected Copper Ores Using Statistical Design of Experiments

The drum agglomeration of two different crushed copper ores (I and II) has been optimized using Taguchi's L₁₆ (4⁵) orthogonal array design to determine the optimum conditions for maximizing the average agglomerate size and minimizing the amount of fines. The effects of controllable operating factors including moisture content (ore I: 9.6–11.1%; ore II: 12.8–14%), retention time (2–4 min), drum speed (15–45% critical), drum load (ore I: 13–32%; ore II: 6–24%) and acid concentration (6.5–90 g/L) on the performance of the agglomeration process were studied. For ore I, the maximum average agglomerate size and minimum percent fines (?1 mm) occurred under the conditions: drum load (22.75%), moisture (10.35%), time (4 min), drum speed (30% critical), and acid concentration (41 g/L), whereas for ore II, the same conditions occurred under the drum load (18%), moisture (13%), time (3 min), drum speed (30% critical), and acid concentration (30 g/L). Under the conditions studied for ore I, the most effective parameter for maximizing average agglomerate size and minimizing the amount of fines was found to be drum load. For ore I, time and acid concentration had a measurable effect on maximizing average agglomerate size, whereas moisture had a statistically significant effect on minimizing the amount of fines. For ore II, the most effective parameter for maximizing average agglomerate size and minimizing the amount of fines was found to be acid concentration. Time had a measurable effect on maximizing average agglomerate size, whereas the other variables did not affect the responses significantly for ore II.     

REVIEW OF AGGLOMERATION PRACTICE AND FUNDAMENTALS IN HEAP LEACHING

ABSTRACT

This article reviews agglomeration practices for precious metal and copper heap leaching. Both industries prefer drum to conveyor agglomeration, particularly for clayey ore or ore having a high fines content. Precious metal heap leaching operations opt for cement in a dosage from 2.5 to 10 kg cement/t of ore (5–20 lb/ton) added to a cyanide solution. Copper ores are agglomerated with water and up to 40 kg sulfuric acid/t of ore (80 lb/ton) without binder. The agglomerate physical characteristics, with the exception of their strength, can be measured precisely and automatically. The impact of agglomeration on the in situ physical characteristics of the heap, other than the observable ponding and slumping, is not understood well. The most substantial benefits of agglomeration include up to 90% metal recovery from poorly permeable ores, shorter leach cycles, extra metal recovery from already-leached tailings, and better environmental heap closure.     

Disintegration of Northern Cape iron ores under reducing conditions

Abstract

Cracking occurs in the first step of gaseous reduction of hematite iron ore, to magnetite, and can lead to the formation of fine material, with deleterious effects on operation of shaft furnaces. To study this, samples of three ore types from the Northern Cape iron ore field in South Africa, and one blended ore from this region, were studied. The methods were high temperature microscopy (during reduction) and quantification of fines formation following reduction disintegration tests. The ore types do differ significantly with regards to their propensity to form fines. Although disintegration is clearly triggered by reduction, no direct correlation could be established between the degree of reduction and the amount of fines generated. Reduction disintegration increased with higher hydrogen percentages (>5%) in the reduction gas, and at higher temperatures (in the 500–700°C range). Disintegration of the samples decreased at temperatures >750°C. There was no correlation between the presence of gangue minerals and fines formation.     

新钢常用国内外烧结粉矿冶金价值技术经济分析

根据烧结、炼铁生产实际,采用通用铁矿粉冶金价值技术经济分析方法分析了新钢公司常用国内外烧结粉矿的生产使用效果。认为在目前价格条件下综合比较,南美粉矿的生产使用效果优于印度粉和澳粉(含杨迪粉)。采购南美粉矿在现阶段有其经济性和合理性。     

巴西Vale典型富矿粉特点及其烧结技术措施

阐述了Vale烧结用富矿粉的典型特点及其与他国铁矿石的差别,介绍了国内某些钢厂配加Vale粉矿进行烧结所获得的实验室和实际生产经验,对烧结配加Vale粉矿应采取的技术措施提出了建议。     

快速失重法测定富矿粉,焦粉的水分

人重水分测量装置确定了富矿粉和焦粉的极限失重温度。在两者的极限失重温度（３００℃,４５０℃）下进行了水分测量,含有６．６５％朱分的富矿粉,测定时间为５ｍｉｎ;含有２．２５水分的焦粉,测定时间为２．７５ｍｉｎ。