Abstract: Apparatus and method for drying and cooling products of a granular nature such as coal as they move downwardly through two flow paths by directing ambient air horizontally through the flow paths into a chamber between the flow paths are disclosed. The chamber is partitioned, and air flow is controlled, so that more air flows through the upper part of the chamber as compared with the lower part of the chamber.

Abstract: A hydrocyclone having a primary vessel with multiple inputs, a removable wide mouth top provided with a splash shield and adjustable atmospheric pipe, and quick open-close clamps for making the top quickly removable from and reattachable to the hydrocyclone vessel. A removable apex cone together with changeable wear plate is provided for the outlet and operating opening of the hydrocyclone. A removable vortex finder is also provided together with adjustable holddown rods provided on the top cover plate for maintaining the vortex finder in proper position within the vessel.

Abstract: A method of cleaning a raw ore product such as coal is disclosed wherein the ore product temperature is increased up to about 200.degree.-212.degree. F. before water is separated therefrom whereby the moisture content of the cleaned product is controlled. The ore product is passed through a bath of hot water, then surface water is removed before the ore product is moved through an evaporative cooler in a downward direction while being subjected to air at ambient temperature and at an air capacity of between 10,000 and 15,000 cubic feet per ton of ore product.