River gravel grinding machines selected river pebbles need is a natural stone, taken from the experience of thousands of years ago after the crustal movement generated by the old riverbed gravel mountain ridge, the long-term impact of experiencing flash floods, water removal process continues extrusion, formation of friction. River gravel surface density of 2.5g / m3 Raymond mill, a bulk density of 280kg / m3, robust indicators of 95-99.8%. River gravel main chemical composition is silicon dioxide, followed by a small amount of iron oxide and small amounts of manganese, copper, aluminum, magnesium and other elements and compounds, quality hard, with compressive strength, abrasion wear characteristics of natural stone, which is a ideal building material. After crushing river gravel as concrete aggregate, in construction materials market has a certain history and is widely promoted, its main purpose is twofold: industrial and civil construction of concrete aggregate and road construction in the horizontal stabilizer layer material. River gravel storage usually rich ultra-fine milling machine, and low mining costs in its economic development potential behind vertical milling machine, revealing a huge demand for high-quality sand. After river gravel crusher later, it is mainly used in many sectors in mining, smelting, building material, highway, railway, water conservancy and chemical industries, breaking strength not exceeding 320 MPa of various materials. If you want river gravel grinding ground, you first need to go through river gravel crusher into the Raymond maximum feed size with the size, and then Raymond milling. When selecting Raymond model, we must first clear the milling of raw materials they need, when production and other issues. Technician Lei Zhengzhou Machinery Co., Ltd. will be based on your needs choose a suitable product for you. Our company is specialized in the development, production and sales of Raymond, crushers, high-pressure micro-grinding and other products manufacturer. Maintenance, installation and maintenance of the machine is an extremely important regular work, it should work closely with most of the operations and maintenance, etc., should be full-time personnel on duty checks. Machine maintenance 1, bearing shoulder the entire load of the machine, so good lubrication of the bearing life of a great relationship mill, which directly affect the life and the operation rate of the machine, which requires the injection of the lubricant must be clean, seal must well, at the main oiling the machine (1) Turn bearing (2) roller bearing (3) all gears (4) activities bearings, sliding plane. 2, the newly installed tire prone to loosening must always be checked. 3, note that each part of the machine is working properly. 4, pay attention to check the wear of wear parts, pay attention to replacement of worn parts. 5, release of the active device chassis plane should avoid activities out dust and other materials bearing can not move the machine on the chassis can not meet the crushed material, so as to cause a serious accident. 6, bearing temperature rise, should immediately stop check the reason to eliminate them. 7, the rotation of the gear in operation should be immediately stopped if the impact of sound check and eliminate. High pressure mill, milling machine, the machine is provided by Lei Lei Machinery Co., Ltd. Zhengzhou. Zhengzhou Lei Machinery Co., Ltd. (www.hnzljx.net) (www.hnzljx.net) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!