A horizontal ball mill can be used as in a lime slaking circuit just as well as a vertimill.
Some operations apply the raw quicklime directly to the ore on the belt moving toward further crushing or grinding. In this application, it is necessary only to have a suitable lime storage tank with a live bin bottom and a means for metering the lime from the tank to the ore. Such metering devices may be screw conveyor, belt conveyor or star valves. An activated bin bottom on the storage tank, commonly referred to as a live bin bottom, is very desirable to promote, uniform discharge from the tank. The lime is thus intimately mixed with the ore and slakes to form hydrated lime when it comes in contact with the cyanide leach solution.
When mill practice requires that the lime first be slaked and made into a water slurry, the design engineer will find a wide variety of lime slakers available. All of these reject most of the inert material in the line except the ball mill slaker which grinds the core, which then reports with the lime slurry. Because of the high reactivity of the lime available, it