Natural round-grained washed and dried quartz sand is a non-metallic mineral with stable performance, acid and alkali resistance, which is mainly used in casting, ladle drainage, oil fracturing, stadium artificial turf sand washing, children's playground sand pits, artificial beaches, mortar, and artesian leveling industries, and is widely used.
Its production process mainly includes the following steps:
First of all, select high-quality natural quartz sand ore, high-quality sand source is the key to produce high-quality products, Hebei Chengde paddock area has high-quality aeolian sand ore source, sand ore in this area, with white sand, less impurities, high silicon content, uniform and reasonable particle size composition and other advantages, in addition, Inner Mongolia Tongliao, Liaoning Zhangwu also have such mineral sources, but the sand in Zhangwu area of Zhangwu area is less coarse sand, more fine sand.
Next, the mined raw ore is treated to remove tree roots, stones, and weeds from the sand grains in preparation for sand washing.
Then there is the sand washing link, this link to use the sand washing machine, according to the sand mud and ash situation, generally after 2 to 3 times of washing, mainly to clean off the mud and ash in the sand, and the rust on the surface of the sand, so that the sand is clean, to meet the relevant use standards, this link should pay attention to energy saving and water saving and wastewater treatment and reuse issues, set up a sedimentation tank, so that the water of sand washing can be precipitated and flocculated and reused, and the wastewater that cannot be used can be discharged according to the requirements after rational treatment.
Next is the roasting and drying process. Roasting and drying has three purposes, one is to remove the cyten in the sand through roasting and drying, the second is to burn off the rust on the surface of the sand through roasting and drying, so that the surface of the sand is more smooth, and the third is to burn the non-quartz substances in the sand through high-temperature roasting, so that the quartz sand is more pure and the silicon content is further improved. Roasting and drying is an important part of quartz sand production, which can improve its hardness and wear resistance. The roasting temperature and time should be strictly controlled to ensure product quality.
The next step is the screening process, this link to use the vibrating screen, through the screening, can be coarse and fine mixed sand screening into the required specifications of the mesh, according to the industry application, generally there are 16-30 mesh, 20-40 mesh, 30-50 mesh, 40-70 mesh, 50-100 mesh, 70-140 mesh, etc., in the screening process, the number of sand mesh compliance test should be carried out as required, so that the finished product meets the relevant standards, unqualified finished products will cause an increase in cost and waste of resources.
The next step is to inspect and fill the finished product, and the sand that has passed the screening is packaged after passing the inspection, according to the packaging requirements, it can be packed in tons of bags or small bags, and the packaged finished products are put into storage and recorded.
Throughout the production process, quality inspection and control are required to ensure that the performance indicators of the final product meet the requirements. At the same time, it is necessary to pay attention to environmental protection and resource conservation, rational use of resources, and reduce pollution emissions.