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Selection of width and length of the screen surface The width and length of the screen surface is an important process parameter for the screen. Generally speaking, the width of the sieve surface determines the processing capacity of the screening machine. The length of the sieve surface determines the screening efficiency of the screening machine. Therefore, the width and length of the sieve surface are correctly selected to improve the production capacity and screening of the vibrating screen machine . Efficiency is very important. The width of the screen surface is not only affected by the processing capacity of the screen, but also by the structural strength of the screen. The larger the width, the more certain the size of the screening machine is. The more problems that need to be solved in the structural strength of the screening machine , the more difficult it is, so the width of the screen surface cannot be arbitrarily increased. The length of the screen surface affec

A. Preparations before construction: The materials and accessories required for construction are fully prepared (three types of I-beam, channel steel, steel plate, electric welding machine, wire, bar, chain, 2 pulleys, 4 inch steel pipe, 3 inch steel pipe, 2 sets of oxygen acetylene, sand, cement, red brick, air duct, wind raft 2, etc.). The lifting beam is made to ensure that the lifting trommel screen is firm and reliable. Before construction, the construction supervisor will lead all construction personnel to learn the measures. The construction personnel must arrive at the construction site 30 minutes in advance to familiarize themselves with the operation of the on-site equipment. The person in charge of the construction shall have a clear grasp of all the lines, equipment and materials on site. The person in charge of construction assigns the tasks of the construction personnel on site and makes the construction personnel clear their respective tasks. B. Precautions during

Sand washing wastewater refers to the wastewater generated by the washing sand and gravel production enterprises in the production process. Sand and gravel is one of the basic materials of the building. With the increasing demand for domestic sand and gravel, the natural sand is facing the reduction of resources and environmental protection. The pressure, washed sand will be used as an important source of construction sand in the building materials market. Washed sand can be widely used in concrete, mortar and products. It has become a good market prospect in modern construction projects. The replacement of natural sand in quality and quantity is one of the signs that the artificial sandstone production line has entered a new era of development. Characteristics of sand washing wastewater The sand washing wastewater is the water produced by sand dewatering screen . The main pollution factors are chemical oxygen demand and suspended solids, and the suspended solids content is the