Environment-friendly purification and comprehensive utilization and mineral recovery process for sand-making tail mud

Abstract

The invention discloses an environment-friendly purification and comprehensive utilization and mineral substance recovery process for sand-making tail mud, which comprises the following steps: conveying a fine sand and mineral substance mixture separated by a cyclone to a medium-speed spiral chute unit for treatment to obtain mineral substances, fine sand and muddy water; conveying the muddy water and muddy water separated from the hydrocyclone into a rotational flow sedimentation tank, and starting a stirring paddle while adding clear water to impact and dilute the muddy water, so that fine ore micro-sand is settled and gathered at the bottom of the rotational flow sedimentation tank; extracting the fine ore micro-sand sediment, adding clear water to adjust the sand-water concentration, and feeding into a low-speed spiral chute machine for treatment to obtain fine ore, micro-sand and muddy water; the muddy water and muddy water overflowing from the rotational flow sedimentation tank are fed into a wet-type strong magnetic separation unit to adsorb magnetite micro powder, the muddy water enters a sedimentation tank to be settled, sediment is pumped out and dehydrated, and low-iron tail mud is obtained. According to the method, waste of the sand making industry is reused, tail mud pollutant emission is reduced, mineral resources are effectively recycled, and loss and waste of the mineral resources are avoided.

Description

technical field [0001] The invention relates to a process for recycling sand-making tail mud, in particular to a process for environmental protection, purification, comprehensive utilization and mineral recovery of sand-making tail mud. Background technique [0002] A large amount of sludge is generated in the process of tailings treatment and construction sand production. Since there is no corresponding treatment technology and comprehensive utilization method, the sludge can only be filtered into a mud cake by a filter press, and then transported away by a mud truck. Stacking or landfilling in wasteland will seriously pollute the surrounding environment and water and soil resources, and easily induce safety risks such as geological disasters. [0003] Due to the low mineral content of sand-making raw materials and no independent mining value, sand-making enterprises and river-clearing enterprises only pay attention to the value of sand, while ignoring the potential value o...

AI Technical Summary

Problems solved by technology

[0002] A large amount of sludge is produced in the process of tailings treatment and construction sand production. Since there is no corresponding treatment technology and comprehensive utilization method, the sludge can only be filtered into mud cakes with filter presses, and then transported away by mud trucks. Stacking or landfilling in wasteland will seriously pollute the surrounding environment and water and soil resources, and will easily induce safety risks such as geological disasters

[0003] Due to the low mineral content of sand-making raw materials, they do not have the value of independent mining. Therefore, sand-making enterprises and river cleaning companies only pay attention to the value of sand, while ignoring the potential value of minerals in sand and mud, and there is no corresponding treatment technology, resulting in A large amount of minerals are lost and wasted with construction sand mixed into concrete, and another part of minerals is lost in the wilderness with tailing mud, resulting in serious loss and waste of mineral resources and rare strategic resources

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