Sulfuric acid, slag, gypsum, etc.
Sulfuric acid
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Sulfuric acid is produced in the copper smelting process using as raw material the sulfur contained in copper concentrate.
It is a colorless, odorless viscous liquid, and multiple products are manufactured for different uses, which range widely from industry to agriculture.
Types and quality standards
Sulfuric acid content | Residue on ignition | Iron content | |
---|---|---|---|
Concentrated sulfuric acid | Nominal sulfuric acid or more | 0.05% or less | 0.03% or less |
Dilute sulfuric acid | |||
Oleum (fuming sulfuric acid) | Nominal free sulfur anhydride or more |
Applications
Fertilizer, textile, paper and pulp, titanium oxide, resin, steel
Slag
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The Group produces copper slag—iron silicate resulting from the bonding of iron in copper concentrate with silica in the copper smelting process. It is crushed by high-pressure water to form black, glassy granules.
Having a large specific gravity of 3.5 and high hardness (6 Mohs or more), this industrial product has greater grain size stability than natural sand.
Types, forms, sizes, etc. | Copper slag |
---|---|
Standard | Composition: Fe 35 to 45%, SiO2 30 to 40%, Al2O3 3 to 5% |
Grain size: 0.3 to 5 mm | |
Applications | Raw material for cement (iron source for clinker), sandblasting material, port applications (caisson filling material, sand compaction material), secondary concrete products, and fine aggregate for ready-mix concrete |
Copper sulfate
![](/english/products/bullion/images/sulfuric_im03.jpg)
The Group produces copper sulfate by refining and crystallizing copper electrolyte in the copper refining process.
It has a wide range of applications from agricultural chemicals to plating and catalysts.
Forms | Blue crystalline powder |
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Quality standard | CuSO4, 5H2O≧98.5% |
Main applications | Agricultural chemicals (for disease control), industrial plating, catalysts |
Gypsum
![](/english/products/bullion/images/sulfuric_im04.jpg)
The Group produces gypsum, a white powdered substance, by adding calcium carbonate to sulfur, contained in copper concentrate.
Three types of gypsum are produced depending on the production process.
Types, forms, sizes, etc. | Sulfuric acid gypsum, flue gas desulfurization gypsum, waste acid treatment process gypsum |
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Applications | Gypsum board, raw material for cement (solidification accelerator) |
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