A complete analysis of the characteristics and uses of hematite

1. Core characteristics of hematite

1️⃣ Chemical composition

The chemical formula is Fe₂O₃ (ferrous oxide), with an iron content of up to 70%, and it is an important source of iron ore.

2️⃣ Physical properties

Color: The surface is steel gray to iron black, and the streak is a signature cherry red (key identification feature)🔴

Luster: Semi-metallic to metallic luster, crystals are flaky or blocky

Hardness: Mohs hardness 5.5-6.5, specific gravity 4.9-5.3

Magnetic properties: weakly magnetic (distinguished from magnetite)🧲

3️⃣ Formation environment

Common in sedimentary rocks, metamorphic rocks and volcanic rocks, generated under high-temperature hydrothermal or oxidizing conditions.

2. Core uses of hematite

🏭 Industrial field

Metallurgical raw materials: core ore for iron smelting, production of pig iron, steel, and alloys

Heavy medium separation: high specific gravity characteristics are used for ore dressing and separation

Catalyst: Nano-scale hematite is used for sewage treatment and chemical catalysis

🎨 Pigments and materials

Red pigments for ancient rock paintings/pottery (such as Chinese painted pottery culture)

Raw materials for modern industrial coatings and anti-rust primers

Gem-grade hematite is polished to make black jewelry (such as Mexican "black rose stone")💎

🔬 Scientific research and people's livelihood

Mineralogy teaching specimens

Radiation shielding materials (high density characteristics)

Soil remediation agents (adsorption of heavy metals)

3. Comparison with other iron ores

4. Interesting cold knowledge

🌋 The surface of Mars is red because it is rich in hematite and is called the "Red Planet"

⚒️ The earliest evidence of human iron smelting (Hittite civilization in 2500 BC) is the use of hematite

📚 Hematite is not only the cornerstone of industry, but also the "red code" throughout the history of human civilization!

Author: Xingaonai
Reprint address: http://xingaonai.cn/mineral-profile/a-complete-analysis-of-the-characteristics-and-uses-of-hematite.html