Quicklime
Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 28.25. > Quicklime > Quicklime
Duty Rate (from China)
Subheadings
Products classified under Tariff item 2522.10.00
Agricultural Quicklime Soil Amendment
Agricultural quicklime in pebble form, produced by calcining limestone, used to correct soil pH and supplement magnesium in acidic farm fields. It is in the crude or processed state permitted by Chapter 25 and is not roasted, calcined beyond the heading's scope, or mixed, so it falls under tariff item 2522.10.00.
Chemical Manufacturing Quicklime
Technical grade quicklime in lump form, used as feedstock for producing calcium carbide and other organometallic compounds. It is obtained by calcining limestone and has not undergone processing beyond that allowed in Chapter 25, so it is classified as quicklime under 2522.10.00.
Construction Quicklime for Mortar
High-reactivity quicklime in pebble form, intended for slaking into lime putty for traditional masonry mortars and plasters. It is quicklime as defined in heading 25.22, not hydraulic or slaked lime, and is not processed beyond crushing or grinding, so it falls under 2522.10.00.
Gold Mining Quicklime
Lump quicklime used in gold mining cyanidation processes to provide alkaline conditions for ore processing. It is unhydrated quicklime derived from limestone calcination, with no processing beyond the mechanical processes allowed in Chapter 25, so it is classified under 2522.10.00.
Industrial Quicklime Powder
High-calcium quicklime in fine powder form, produced by calcining limestone and used in steelmaking for slag formation and impurity removal. It is quicklime under heading 25.22, and powdering is a permitted mechanical process, so it falls under 2522.10.00.
Metallurgical Grade Quicklime
Coarse quicklime lumps graded for use in blast furnaces and steel desulfurization processes. It is unslaked quicklime from high-purity limestone calcination, with no processing beyond crushing or sizing, so it is classified under 2522.10.00.
Paper Industry Quicklime
Reactive quicklime powder used in kraft pulping for caustic recovery cycles and brightness control. It is quicklime from limestone calcination, and powdering is a permitted process, so it falls under 2522.10.00.
Water Treatment Quicklime
Fine-ground quicklime optimized for pH adjustment and softening in municipal water purification plants. It is mineral-derived quicklime, not a precipitated chemical, and grinding is a permitted mechanical process, so it is classified under 2522.10.00.