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Calcium Hydroxide (Hydrated Lime, Slaked Lime) Ca(OH)2

Raw Materials

Natural Limestone

Manufactured Process Summary

The natural limestone is calcined at 1100 degrees Celsius, and thus the limestone is reduced to calcium oxide (CaO). The calcium oxide is reacted with pure water (H2O) to form calcium hydroxide (Ca(OH)2). After the calcium carbonate is dehydrated, crumbled, classified by fineness and packaged, it is called calcium hydroxide (also known as hydrated lime or slaked lime).

Product Introduction

Calcium hydroxide is commonly called hydrated lime or slaked lime, which appears as fine white powder and has the density of 2.24 g/cm3. It could be slightly soluble in water and shows strong base. It may gradually absorb carbon dioxide in the air to be changed into calcium carbonate. Calcium hydroxide can be soluble in acids. Its common application is to environmental friendly acid-base neutralization, modification of acidic soil, and the additives of industrial chemicals.

Product Specifications

          Property

Type

      

Advanced Slaked Lime

Superior Slaked Lime

Appearance

White Powder

White Powder

Assay of Ca(OH)2

85%

92%

250 mesh Residue

max. 4%

max. 4%

CaCO3

max. 12%

max. 7%

CaO

max. 2.0%

max. 2.0%

SiO2

max. 5.0%

max. 2.0%

MgO

max. 1.0%

max. 0.8%

Fe2O3

max. 0.8%

max. 0.5%

Al2O3

max. 0.8%

max. 0.5%

Moisture

max. 2.0%

max. 2.0%

pH value

12.5±1

12.5±1

(The above table is provided for reference only )

Product characteristics

  • Moderately strong base, white powder.
  • The product is superior; users could choose the type according to the applicable purity.

Applications

  • Apply to environmental friendly acid-base neutralization: acidic wastewater or sewage treatment, flue gas desulfurization (FGD), etc.
  • Apply to industrial raw materials: antacids, astringent bleaching powder, light carbonate, chemical reagent, hard water softener, plastic fiber, calcium sulfonate, calcium hypochlorite, etc.
  • Apply to building materials: soil stabilizer, concrete modifier, caulking coagulant of gypsum board, stone cutting agents to help, ingredients of construction adhesive, etc.
  • Apply to agriculture and animal husbandry: such as disinfection of aquaculture fish farms and pigsties. Mushrooms cultivation (such as shiitake). In the other way, lower or improve soil acidity in agriculture; for example, bordeaux mixture (green pesticide) is applied to fruit and vegetables.
  • Apply to others: additives, leather packing, metallurgy, paints, oil lubricants, papermaking, food products, feed, drugs, etc.

Package

The appearance of the product is white powder, which is packaged in a three-layered laminated moisture-proof kraft sack per twenty kilograms or a bag per five hundred kilograms.(Tank cars transporting)