overburnt

As far as being no-fuss, the first time, mine were overburnt, 2nd batch, overdone, 3rd batch, juusssttt right.

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Underburnt limestone will not hydrate, while overburnt material is too hard and dense for slaking, or hydrates very slowly.

Chapter 4 1988

· Traditional lime burning in intermittent kilns waste a great deal of fuel (usually firewood) and often produce non-uniform, low quality limes (overburnt or underburnt).

Chapter 4 1988

The oversize core and overburnt material can be slaked separately for a longer period in deep slaking pits and then rescreened.

3. Technical and Production Information 1985

In general however, highly reactive porous type quicklime will require a greater proportion of water than dense or overburnt quicklime.

3. Technical and Production Information 1985

For a dry hydrate, the lime can then be screened by a barrel screen or an air separator can be used to separate the oversize core or overburnt material.

3. Technical and Production Information 1985

A variance in stone feed size will result in the smaller size being overburnt or the larger size having a core of unburnt material, or both.

3. Technical and Production Information 1985

- A fixed volume of overburnt stone will be heavier than soft burnt stone due to shrinkage, i.e. more stone lumps will fit into the same volume.

3. Technical and Production Information 1985

- If water is poured over an overburnt stone and a lightly burnt stone, the former will react more slowly (low reactivity).

3. Technical and Production Information 1985

The stone shrinks (becomes overburnt) by the increasing of crystal size and hence the reduction in the number and size of pores.

3. Technical and Production Information 1985