Spiral separator is one mining machine used for ore dressing production, which precipitated in the liquid at different speeds by means of the proportion of solid particles and which is a device of the mechanical grading. The screw classifier can grind the material into the powder level in the filter, and then the coarse material can be discharged from the overflow tube. The spiral classifier is also referred as grader. The screw classifiers mainly four types such as high weir single spiral classifier, double spiral, sunken single spiral and double helix classifier.Maintance methods of the spiral classifier:1. All lubricating points should be lubricated by sodium base grease or calcium base grease.2. Workers should check the inside of reduction box to make sure whether the lubricating oil is on the oil needle scribed line, and the oil shoule be replaced every six months.3. Workers should often check the lower support, and check whether the middle bearing pad, bearing and seal ring are worn or broken, in order to replace timely.4. Bearing must be lubricated every 4 hours by pouring high pressure oil into the bearing with manual oil pump, and in that way to keep sealability of the bearing.The screw classifier is also called the spiral classifier, spiral separator or China spiral classifier. There are mainly four types of classifiers, namely high weir single spiral separator, high-weir dual spiral separator, sinking single spiral separator and sinking dual spiral separator. The screw classifier is also called the spiral classifier, spiral separator or China spiral classifier. There are mainly four types of classifiers, namely high weir single spiral separator, high-weir dual spiral separator, sinking single spiral separator and sinking dual China spiral separator. The classifiers can form a closed circuit with the ball mill to distribute the ores, grade slurry and deslime mud in ore and metal dressing process.small ball mill for sale:...