Complaint
| color | white |
| raw material | limestone |
| apperance | powder |
| purity | >90% |
| application | food industry |
| package | 25kg/1000kg Plastic Lined Top-Grade PP woven Bag |
| grade | industrial |
| loading capacity | 16-18tons/20' container |
Hydrated lime is a type of dry powder made from limestone. It is created by adding water to quicklime in order to turn oxides into hydroxides. Combined with water and sand or cement, hydrated lime is most often used to make mortars and plasters. Its chemical name is calcium hydroxide, or Ca(OH)2.
When making hydrated lime, a manufacturer must first make quicklime. Quicklime is made directly from the calcination in raw limestone by the process of calcining and consists of calcium oxide and magnesium oxide. In this process, limestone is first broken up to reduce its size. Then it is washed and taken to kilns to be heated through a three step process: preheating, calcining, and cooling. Once cooled, the quicklime is crushed and then water is added.
Hydrated limes are classified by the amount of water they retain and their maximum air content. S types retain 85 percent water, N types 75 percent. NA and SA types are classified as having a maximum air content of 14 percent, and N and S types have seven percent air content.
Item | Standard | Test results |
Color | White | White |
Form | Powder | Powder |
Ca(OH)2 | 95.0%~100.5% | Pass test |
Carbonate | Pass test | Pass test |
Magnesium and alkali metals | 2.0% max | 1.55% |
Acid insoluble matter | 0.1% max | 0.088% |
As | 2mg/kg max | 1.65mg/kg |
Fluoride(As F) | 50mg/kg max | 48.9mg/kg |
Pb | 2mg/kg max | 1.66mg/kg |
Heavy metal(As Pb ) | 10mg/kg max | 9.67mg/kg |
Loss on drying | 1.0% max | 0.99% |
Sieve residue(0.045mm) | 0.4% max | 0.385% |
