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, a bulk density of 280kg / m3, robust indicators of 95-99.8%. River gravel main chemical composition is silicon dioxide, followed by manganese, copper, aluminum, magnesium and other elements of a small amount of a compound of iron oxide and trace and marble mill, the quality of hard, with compression, wear-resistant properties of natural stone abrasion , it is an 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 abundant and low mining costs Raymond machine, behind its economic development potential, 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. How Raymond mill commissioning work: if we bought a new Raymond later, we can be assembled in their own factory, then assembled for just Raymond, they are not able immediately apply to the production of which barite mill, because Raymond is the main target of stone, hence the need for about commissioning work, otherwise it will be for Raymond is a very dangerous thing. For debugging Raymond machine should start commissioning start, installed after Raymond machine, you can use the manual way to turn the disc, in rotation, the main observation there chuck phenomenon, if not chuck phenomenon, commissioning work can be carried out. For the test approach is two ways: one is the no-load test mode, another way is to load test. We can according to their actual situation to select a test mode, we also of two test methods are carried out, so that is more conducive to our safety tests. For no-load test, it is not in the case of feed for Raymond machine for testing. However, the no-load test we must meet the following conditions: first, in the electrical interlocking system test, then can start the program, so that start-up procedure and close the program are designed to meet the need; second, we must ensure it is members have stepped firmly; third, all of the flywheel can be rotated smoothly. Also in the running process among mills, we should always pay attention to the bearing temperature, preferably not more than thirty degrees. In the process of running them, we want to keep the bearings lubricated properly, no leakage phenomenon. Lei Machinery (FIG), barite milling machine, milling machine provided by Zhengzhou Machinery Co., Ltd. Lei. Zhengzhou Lei Machinery Co., Ltd. (www.hnzljx.net) (www.hnzljx.net) is specialized in "Raymond, shredders, mills," the business, the company adhering to the "honesty, hard service" concept To provide you with the highest quality products and services. Welcome to inquire! Contact: Manager.