Engineering Insights

Knowledge area

Minerals, Ores & Industrial Materials

A sourced technical knowledge centre covering industrial minerals, metallic ores and process materials, with grinding, drying, classification, screening and ore-preparation behaviour kept technically distinct.

Articles

Technical explanations and selection logic.

99 published articles

Carbonate minerals and rocks

Other industrial minerals

Clays and aluminosilicates

Siliceous and volcanic materials

Process materials and industrial by-products

Metallic ores

28Iron Ore: Hematite, Magnetite and Ore Preparation

Understand hematite and magnetite iron ores and the role of crushing, grinding, screening, classification and preparation before beneficiation.

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29Gold Ore: Mineralogy, Liberation and Ore Preparation

Review free gold, sulfide associations, crushing, grinding, classification and liberation before downstream gold beneficiation.

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30Copper Ore: Preparing Sulfide and Oxide Ores

Compare sulfide and oxide copper ores, including chalcopyrite, grinding, liberation and preparation for downstream beneficiation routes.

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31Lead Ore: Galena, Liberation and Preparation

Review galena-bearing lead ore, its association with zinc and other sulfides, and grinding, liberation and preparation before beneficiation.

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32Zinc Ore: Sphalerite, Mineralogy and Ore Preparation

Understand sphalerite-bearing zinc ore, iron substitution, association with lead sulfides and the implications for grinding, liberation and preparation.

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33Lead-Zinc Ore: Selective Liberation and Preparation

Review galena-sphalerite association in lead-zinc ores, selective liberation, grinding, classification and preparation for downstream separation.

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34Silver Ore: Carrier Minerals and Ore Preparation

Understand native silver and silver-bearing minerals, their association with lead, zinc and gold systems, and the implications for grinding and liberation.

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35Chromite / Chromium Ore: Liberation and Size Preparation

Review chromite as the principal chromium ore mineral and the role of density, particle size, liberation and preparation before beneficiation.

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36Manganese Ore: Oxide, Carbonate Minerals and Preparation

Review manganese oxide and carbonate minerals, gangue separation, crushing, screening, grinding and preparation before beneficiation.

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37Nickel Ore: Sulfide and Laterite Ore Differences

Understand the mineralogical and process differences between sulfide nickel ores and laterites, including grinding, liberation and ore-preparation boundaries.

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38Cobalt Ore: Copper-Nickel Associations and Preparation

Review cobalt as a co-product or by-product in copper and nickel ores, cobalt minerals and the mineralogical boundaries of ore preparation.

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39Molybdenum Ore: Molybdenite, Copper Association and Grinding

Review molybdenite-bearing ores, association with porphyry copper systems, platy particle behaviour and grinding-liberation decisions.

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40Tungsten Ore: Scheelite, Wolframite and Preparation

Review scheelite and wolframite tungsten ores, high density, brittleness, fine-particle loss and preparation for gravity or magnetic separation.

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41Tin Ore: Cassiterite, Gravity Preparation and Fine Control

Review cassiterite tin ore, high density, brittleness, gravity separation and the risk of fine-particle losses during crushing and grinding.

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42Antimony Ore: Stibnite, Gold Association and Preparation

Review stibnite-bearing antimony ore, association with gold and other sulfides, brittleness, grinding-liberation and preparation for downstream beneficiation.

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43Bauxite: Aluminum Ore, Mineralogy and Preparation

Review bauxite mineralogy, gibbsite, boehmite and diaspore, plus crushing, screening, moisture-clay behaviour and preparation before Bayer refining.

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44Lithium Ores: Spodumene, Lepidolite and Hard-Rock Preparation

Review spodumene, lepidolite and petalite in hard-rock lithium ores, including crushing, grinding, sizing and preparation before chemical processing.

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45Titanium Minerals: Ilmenite, Rutile and Ore Preparation

Review ilmenite, rutile and titanium-ore preparation in heavy-mineral sands and hard rock, including sizing and downstream separation requirements.

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Specialty industrial minerals and salts

46Graphite: Natural Types, Properties and Processing

Review flake, vein and amorphous graphite, with emphasis on liberation, grinding, classification and preparation before beneficiation.

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47Boron Minerals: Borax, Ulexite, Colemanite and Processing

Review borax, ulexite and colemanite in the context of ore preparation, size control, impurity management and process selection.

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48Rock Salt and Halite: Properties, Sizing and Processing

Review rock salt and halite in terms of crushing, screening, drying, solubility, moisture and target particle size.

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49Potash and Potassium Salts: Minerals and Processing

Review sylvite, carnallite and other potash salts in the context of crushing, sizing, solubility and preparation for beneficiation.

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50Trona: Natural Soda Ash Feedstock and Processing

Review trona as a natural soda-ash feedstock and the boundary between crushing, drying, sizing and downstream chemical processing.

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51Sulfur: Natural and Recovered Sources, Processing

Review native sulfur, sulfide-related and recovered sources, with emphasis on sizing, handling and process boundaries.

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60Strontium and Celestite: Minerals, Properties and Processing

Review celestite, the principal strontium ore mineral, in terms of particle size, impurities, grinding and product preparation.

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61Kyanite, Andalusite and Sillimanite: Aluminosilicate Minerals

Review kyanite, andalusite and sillimanite, their shared chemistry, different crystal structures and preparation for refractory raw materials.

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62Industrial Garnet: Properties and Processing

Review industrial garnet in terms of hardness, density, grain durability, crushing, classification and abrasive-product preparation.

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63Nepheline Syenite: Properties, Grinding and Industrial Use

Review nepheline syenite versus feldspar, its alkali-alumina chemistry, grinding, impurities and preparation for glass and ceramic use.

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64Pyrophyllite: Properties, Difference from Talc and Grinding

Review pyrophyllite versus talc, its aluminum-silicate chemistry, grinding, particle size and preparation for ceramic and refractory use.

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65Sodium Sulfate: Mirabilite, Thenardite and Processing

Review natural sodium sulfate, mirabilite versus thenardite, and the role of hydration, drying, sizing and product preparation.

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Critical and technology mineral resources

52Zircon and Zircon Sand: Properties and Mineral-Sands Processing

Review zircon and its role in heavy-mineral sands, focusing on particle size, separation, drying and product preparation.

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53Rare-Earth Ores: Minerals and Preparation

Review bastnäsite, monazite and ion-adsorption clays as rare-earth sources, focusing on mineralogical differences and ore preparation.

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54Niobium-Tantalum Ores: Columbite-Tantalite and Preparation

Review columbite-tantalite and related Nb-Ta minerals in terms of liberation, density contrast, particle size and ore preparation.

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55Vanadium Ore: Sources, Mineralogy and Preparation

Review vanadium in titanomagnetite, sandstone-type and byproduct sources, focusing on comminution, magnetic response and ore preparation.

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56Beryllium Ores: Beryl, Bertrandite and Preparation

Review beryl and bertrandite as beryllium sources, focusing on deposit type, liberation, comminution and downstream preparation.

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57Platinum-Group Metal Ores: PGM Minerals and Preparation

Review ores containing platinum-group metals such as platinum, palladium and rhodium, focusing on sulfide association, liberation and beneficiation preparation.

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58Uranium Ore: Deposit Types, Minerals and Preparation

Review uranium deposit types, minerals such as uraninite and the role of mechanical ore preparation before downstream processing.

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59Cesium and Rubidium: Minerals, Sources and Preparation

Review cesium and rubidium in pollucite, lepidolite and brine resources, focusing on mineral preparation and byproduct context.

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66Bismuth Ore and Sources: Byproduct Context and Preparation

Review bismuth as a byproduct of lead, tin and tungsten ore processing, with emphasis on mineral preparation and multi-metal context.

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67Gallium: Bauxite, Zinc Sources and Byproduct Recovery

Review gallium in bauxite and zinc ores, why it is mainly a byproduct, and the limits of mechanical mineral preparation.

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68Germanium: Zinc Ore, Byproduct Sources and Preparation

Review germanium as a byproduct of zinc ore and other sources, focusing on sphalerite association and the limits of mineral preparation.

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69Indium: Sphalerite, Zinc Ore and Byproduct Sources

Review indium in sphalerite and zinc-processing residues, focusing on mineralogical distribution and byproduct recovery context.

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Major ore-forming minerals

70Hematite: Iron-Oxide Mineral, Ore Role and Preparation

Review hematite as Fe₂O₃, its role in iron ore, liberation, grinding and preparation before beneficiation.

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71Magnetite: Magnetic Iron-Oxide Mineral and Ore Preparation

Review magnetite as Fe₃O₄, its strong magnetic response, liberation, grinding and preparation before magnetic separation.

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72Goethite: Iron Oxyhydroxide Mineral and Ore Behaviour

Review goethite as FeO(OH), its relation to limonite, porous texture, fines generation and iron-ore preparation.

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73Limonite: A Hydrated Iron-Ore Mixture Rather Than One Mineral

Learn why limonite is not a single mineral and review its goethite-rich, hydrated iron-oxide character, moisture and preparation behaviour.

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74Siderite: Iron-Carbonate Mineral and Ore Preparation

Review siderite as FeCO₃, how it differs from iron oxides, and the role of liberation and mechanical preparation before any thermal treatment.

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75Pyrite: Iron-Sulfide Mineral, Ore Role and Preparation

Review pyrite as FeS₂, its role in gold and base-metal ores, liberation, sulfide separation and oxidation-related considerations.

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76Arsenopyrite: FeAsS Mineral, Gold Association and Preparation

Review arsenopyrite as FeAsS, its possible association with refractory gold, distinction from pyrite and preparation before beneficiation.

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77Chalcopyrite: Major Copper-Sulfide Mineral and Ore Preparation

Review chalcopyrite as CuFeS₂, its role in copper ores, liberation, grinding and mechanical preparation before flotation.

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78Bornite: Copper-Iron Sulfide Mineral and Ore Preparation

Review bornite as Cu₅FeS₄, its association with chalcopyrite, enrichment zones, liberation and sulfide-ore preparation.

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79Chalcocite: Cu₂S Copper-Sulfide Mineral and Ore Preparation

Review chalcocite as Cu₂S, its role in supergene copper enrichment, associations with bornite and chalcopyrite, and ore preparation.

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80Malachite: Oxidized Copper Mineral and Ore Preparation

Review malachite as Cu₂CO₃(OH)₂, its occurrence in oxidized copper zones, differences from sulfide ores and mechanical preparation.

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81Galena: PbS Lead Mineral and Ore Preparation

Review galena as PbS, its high density, association with sphalerite, role in lead-silver ores and liberation requirements.

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82Sphalerite: ZnS Zinc Mineral and Ore Preparation

Review sphalerite as ZnS, its association with galena and sulfides, iron and trace-element content, liberation and flotation preparation.

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83Pentlandite: Nickel-Iron Sulfide Mineral and Ore Preparation

Review pentlandite as (Fe,Ni)₉S₈, its association with pyrrhotite and chalcopyrite, liberation and preparation of nickel-sulfide ores.

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84Cobaltite: CoAsS Cobalt-Arsenic Mineral and Preparation

Review cobaltite as CoAsS, arsenic-bearing cobalt mineralogy, sulfide/sulfarsenide associations and mechanical preparation.

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85Molybdenite: MoS₂ Molybdenum Mineral and Ore Preparation

Review molybdenite as MoS₂, its role in porphyry Mo and Cu-Mo ores, platy texture, liberation and flotation preparation.

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86Cassiterite: SnO₂ Tin Mineral and Ore Preparation

Review cassiterite as SnO₂, its high density and hardness, occurrence in hard-rock and placer ores, and preparation before gravity separation.

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87Scheelite: CaWO₄ Tungsten Mineral and Ore Preparation

Review scheelite as CaWO₄, its high density and fluorescence, occurrence in skarn/vein ores, liberation and preparation before gravity or flotation.

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88Wolframite: (Fe,Mn)WO₄ Tungsten Mineral and Preparation

Review wolframite as (Fe,Mn)WO₄, its high density, magnetic behaviour, vein/greisen occurrence and liberation requirements.

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89Stibnite: Sb₂S₃ Antimony Mineral and Ore Preparation

Review stibnite as Sb₂S₃, its role in antimony ores, possible gold association, brittleness, liberation and flotation preparation.

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90Pyrolusite: MnO₂ Manganese Mineral and Ore Preparation

Review pyrolusite as MnO₂, its role in manganese ores, porous or fine textures, gangue mineralogy and size preparation.

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91Ilmenite: FeTiO₃ Titanium Mineral and Heavy-Mineral Preparation

Review ilmenite as FeTiO₃, hard-rock and heavy-mineral-sand sources, magnetic/density behaviour and ore preparation.

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92Rutile: TiO₂ Titanium Mineral and Heavy-Mineral Preparation

Review rutile as TiO₂, its heavy-mineral-sand and hard-rock sources, differences from ilmenite, density and size-control requirements.

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93Spodumene: Lithium Pegmatite Mineral and Ore Preparation

Review spodumene as LiAlSi₂O₆, pegmatite mineralogy, quartz-feldspar-mica association, liberation and preparation before beneficiation.

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94Monazite: Rare-Earth Phosphate Mineral and Heavy-Mineral Preparation

Review monazite as an REE-phosphate mineral group, possible thorium content, placer and hard-rock sources, liberation and physical preparation.

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95Bastnäsite: Rare-Earth Fluorocarbonate Mineral and Preparation

Review bastnäsite as an REE fluorocarbonate mineral, carbonatite ore associations, liberation and physical preparation before flotation.

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96Xenotime: YPO₄ Yttrium and Heavy-Rare-Earth Mineral

Review xenotime as YPO₄, its yttrium and heavy-REE content, association with zircon/monazite, and placer or hard-rock preparation.

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97Columbite–Tantalite (Coltan): Niobium-Tantalum Mineral Group

Review the columbite-tantalite series, the term “coltan”, pegmatite and placer sources, high density and preparation for gravity/magnetic separation.

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98Beryl: Be₃Al₂Si₆O₁₈ Beryllium Mineral and Pegmatite Preparation

Review beryl as Be₃Al₂Si₆O₁₈, its pegmatite occurrence, distinction between gem varieties and industrial ore, and liberation requirements.

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99Uraninite (Pitchblende): Uranium-Oxide Mineral and Preparation

Review uraninite as a uranium-oxide mineral, the term pitchblende, deposit diversity, liberation and radiation-safety boundaries.

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