A method for making building sand from tailings sand

Abstract

The invention relates to a method for making building sand from tailing sand. The method specifically comprises the steps of (1) deferrization (2) desulfuration, (3) desliming and (4) dewatering. In the step (1), magnetic icon in wasted tailing sand is recovered, strong magnets are used for conducting primary selection and enrichment, and then ball milling and grinding are conducted for fine selection to obtain powdered iron; in the step (2) a pump is used for pumping tailing sand at the tail into a distribution box to be distributed into gravity dressing equipment for selection and desulfuration, and the three steps of rough selection, middle selection and fine selection are included and sulfur concentrate is selected out; in the step (3), a slurry pump is used for discharging the tailing sand to a gravity hydrocyclone for slurry separation so as to separate the tailing sand from slurry, and the slurry flows upwards through the gravity hydrocyclone to be discharged into a slurry reservoir; in the step (4), the tailing sand flows downwards to be discharged onto a dewatering screen to be dewatered, and the dewatered tailing sand is the qualified building silver sand. By means of the method, the wasted tailing sand can be turned into wealth from waste, considerable economic benefits can be generated, local environment pollution and potential safety hazards can be avoided, meanwhile economy development can be promoted and the tax revenue can be increased.

Description

technical field [0001] The invention relates to a method for producing building sand from tailings sand, and relates to the technical field of mineral processing and building. Background technique [0002] Abandoned tailings sand has always been the biggest problem for beneficiation enterprises. At the same time, it pollutes the surrounding environment and is also the main source of potential safety hazards. In the process of comprehensive management, through the re-selection of tailings sand, the selected iron powder, iron sulfide, construction sand, etc. It is his creativity to create high economic and social benefits, and his greatest novelty is turning waste into wealth. It is his practicality to turn all the discarded tailings sand into a commodity for sale in the market. The existing production technology and equipment will cause environmental pollution, potential safety hazards, temporary use of land and other shortcomings, which cannot achieve the purpose of compre...

AI Technical Summary

Problems solved by technology

However, at present, there are problems such as small scale, backward technology, low recovery rate, high energy consumption and high cost in tailings re-election in my country.

Due to the lack of unified planning and management, some even cause serious secondary pollution, or cause harm to the safety of tailings ponds

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