5a (40)

1.4. Expression of results

Calculate the active MgO and CaO content as CaO from the eguation:

•100 [%]

K =

0,02804-V

m

where: K_a - is the available limę content by mass, in percent V - is the bolume of hydrocholric acid used, in mililitres m - is the mass of sample, in grams.

Ad. 2. Determination time and temperaturę of slaking

2.1.    Principles

Ouicklime should be tested for their reactivity on slaking by measuring the increase of temperaturę wiich occurs on reaction with water as a function of the reaction time (wet slaking curve).

2.2.    Apparatus Apparatus as on the Fig. 1.

1.    Dewarvessel,

2.    Stirrer motor (300±10) min ^-1 under load,

3.    Stand and support

4.    Blade stirrer madę of suitable plastics

5.    Plastics lid

6.    Calibrated thermometer

5