Characterisation of the Physical and Metallurgical …
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Iron Ore Characterization Techniques in Mineral …
WEBAdditional physical quantities, namely the tumbler index (TI), abrasion index (AI), and shatter index (SI) that define the resistance of the ore to breakdown …
Study and Implementation of Quality Improvement …
cold crushing strength of iron ore pellets. Keywords: Abrasion Index, Porosity, Tumbler Index, Blaine Number I. INTRODUCTION Iron orepelletization is a process of agglomerating iron ore concentrate produced by benefi ciating low grade iron ore. Looking at the current scenario of iron ore availability in India,
Determination of Abrasiveness in Copper-Gold Sulfide …
Keywords: abrasiveness; geometallurgy; iron oxide-copper-gold ore; Bond abrasion test; LCPC 1. Introduction Abrasion is the most common wear mechanism in ore mining and mineral processing ... [2,4–7,11]. The outcome of this test is the Bond abrasion index (Bond Ai), which finds
ENGINEERING NATIONAL INSTITUTE OF TECHNOLOGY, …
The Tumbler Index is a relative measure of the resistance of the material to breakage or degradation by impact. (ii) Abrasion Index: It is a relative measure the degradation of iron ore by abrasion. The Tumbler Index and Aibrasion Index are determined in a tumbler test apparatus as per the Bureau of Indian Standard No. IS:6495 .
Evaluation of Dust Generation during Mechanical Wear …
the fraction of material under 0.5 mm as an abrasion index. However, in the case of the BF process and when using iron ore pellet as Fe containing charge, the dominant fraction of particles in BF flue dust is <0.063 mm.3) This suggests that the above mentioned abrasion index does not exactly indicate the dust generation tendency of pellets. J.
A New On-Line Method for Predicting Iron Ore Pellet Quality
The Abrasion Index (AI) describes fines generation from iron ore pellets, and is one of the most common indicators of pellet quality. In a typical pellet plant, dust is generated during the process and then captured. Can …
Quality requirements of iron ore for iron production
Inside a BF, iron ore is reduced in three stages from mainly Fe 2 O 3 to Fe through Fe 3 O 4 and FeO. As mentioned earlier, there is about a 20% volume increase …
(PDF) Iron Ore Sintering: Quality Indices
Sinter quality requirements. Diagram ΔG°/T for the iron phases in the Fe-O system. (1) ΔG° of the Fe 3 O 4 (2) ΔG° of the FeO (3) ΔG° of the Fe 3 O 4 obtained from the FeO (4) ΔG° of the ...
ISO 11323:2010(en), Iron ore and direct reduced iron …
b) the abrasion index is a relative measure of the resistance of lump ore (3.3), agglomerates (3.8) or hot briquetted iron (4.3) to size degradation by abrasion, referred …
Table of Bond Work Index by Minerals
This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the SG of each mineral samples on the other …
Using Rock Geomechanical Characteristics to Estimate Bond Work Index
Geometallurgical modeling of the production benches is an attempt to estimate the geometallurgical variables of the different ore domains, which leads to a better understanding of the ore and its properties. Having geometallurgical variables results in a more accurate prediction of ore characteristics, an improved drilling and blasting …
Iron Ore Pelletizing Process: An Overview | IntechOpen
The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. …
Characterisation of the Physical and Metallurgical Properties of
The physical prop- natural iron ores from the different Muko ore deposits are erties of the ore were studied by determining their tumble, given in Table 1. The limit values of the Tumble Index (TI) abrasion, and shatter indices as well as their apparent and Abrasion Index (AI) for the iron ore pellets used in porosity.
Development and application of a novel fluxing compound …
Good sinter quality is necessary for efficient BF operation which depends on iron ore quality and i... Blast furnaces (BF) ferrous burden consist of sinter (>50%) with rest being pellets and lump ore. ... sinter feed improves the Tumble index by 4.7 points, lowers the Abrasion index by 2.7 points, and decreases the return fines by 4.4% ...
A New On-Line Method for Predicting Iron Ore Pellet …
The Abrasion Index (AI) describes fines generation from iron ore pellets, and is one of the most common indicators of pellet quality. In a typical pellet plant, dust is …
Iron Ore Pellet Dustiness Part II: Effects of Firing Route and Abrasion …
Effects of abrasion index on the dustiness of iron ore Downloaded by [Van Pelt and Opie Library] at 10:37 12 October 2017 pellets. Only pellets with AI <5% are shown. The abrasion Fig. 9. Cross-sectional micrographs of iron ore pellets at high index was defined as the quantity of 0.5-mm fines produced and low levels of abrasion index …
Iron Ore Pellet Dustiness Part I: Factors Affecting Dust Generation
Iron ore pellets abrade during handling and produce dust. This study was conducted to determine what factors affect pellet dustiness, and whether dustiness can be related to the abrasion index. Factors studied included bed depth within a straight grate furnace; pellet chemistry; firing temperature; coke breeze addition; and tumble index.
Quality requirements of iron ore for iron production
Inside a BF, iron ore is reduced in three stages from mainly Fe 2 O 3 to Fe through Fe 3 O 4 and FeO. As mentioned earlier, there is about a 20% volume increase in the reduction of Fe 2 O 3 to Fe 3 O 4 due to the transformation of crystal lattices. ... Abrasion index, % ...
Direct reduced iron — Determination of the tumble and …
direct reduced iron to size degradation by impact and abrasion. This International Standard specifies the determination of the tumble and abrasion indices of hot briquetted iron (HBI). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited ...
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iron ore. Fig. 3.3 : Effect of size of ore on degree of reduction. Iron ore and agglomerates as charge material should be resistant to abrasion. If they break into finer fractions due to impact, abrasion, compression and volume change within the furnace, the smaller particles result in choking of voids thereby affecting reduction and productivity.
Tumbler Index
The Tumbler Index is a relative measure of the resistance of the material to breakage or degradation by impact. (ii) Abrasion Index: It is a relative measure the degradation of iron ore by abrasion. The Tumbler Index and Aibrasion Index are determined in a tumbler test apparatus as per the Bureau of Indian Standard No. IS:6495 .
Modeling of degradation by impact of individual iron ore …
The sample presents total iron content of 67.8% and silica content of 1.4%. The mean compressive strength [13] is 220 kgf/pellet for pellets contained in the size range 16–12.5 mm, whereas its Abrasion index, measured using the tumbling test [39], was 2.4%. The sample contained 98% in the size range from 9 to 16 mm and were classified …
Direct reduced iron — Determination of the tumble and …
direct reduced iron to size degradation by impact and abrasion. This International Standard specifies the determination of the tumble and abrasion indices of hot briquetted iron …
Tumble used in SINTEFs tumble test (a) Picture (b) Drawing
It was found in the literature that a tumble index above 92% and an abrasion index below 6% show quite good strength for iron ore pellets for the Midrex process [21]. For C 1 A-1100 • C, the ...
Chemical, physical, thermal, textural and …
The iron ores were found to have excellent physical properties exemplify with tumbler index (82 wt%–91 wt%), abrasion index (1.27wt%–4.87 wt%) and shatter index …
(PDF) Iron Ore Pelletizing Process: An Overview
The iron ore pelletizing process consists of three main steps: 1. Pelletizing feed preparation and mixing: the raw material (iron ore concentrate, additives. — anthracite, dolomite — and ...
Chemical, physical, thermal, textural and mineralogical
The iron ores were found to have excellent physical properties exemplify with tumbler index (82 wt%–91 wt%), abrasion index (1.27wt%–4.87 wt%) and shatter index (0.87wt%–1.64 wt%). FTIR and thermal analysis were performed to assimilate the analysis interpolations. ... GOLDRING D C. Iron ore categorisation for the iron and steel industry ...
Analysis of abrasive damage of iron ore pellets
The abrasive wear of iron ore pellets (IOP) during transportation and storage in the iron making industry influences process quality and leads to air pollution. Therefore, prediction of the abrasive wear of IOP enables one to eliminate possible damages during processing. In the present research, the abrasive wear of IOP is …
Determination of Abrasiveness in Copper-Gold Sulfide …
Abrasion is the most common wear mechanism in ore mining and mineral processing operations [1,2,3,4,5,6,7,8]. Albertin and Sinatora [ 2 ] pointed out the relationship between the abrasiveness of minerals and the wear of metal surfaces when their investigations showed that high-chromium white cast iron mill balls underwent …
(PDF) Optimization of pelletization process for iron ore …
Iron ore fines utilized in pellet making consist of alumina in the range of 3.20–3.35% and LOI in the range of 3.50–3.70%. Detailed palletization studies have been carried out on high alumina ...