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A method for dehydrating low-concentration ultra-fine tailings

A low-concentration, tailings technology, applied in separation methods, chemical instruments and methods, furnaces, etc., can solve the problems of high water weight percentage of tailings, reduced production efficiency, and many operation steps, and achieves low price, convenient operation, and high efficiency. The effect of mature technology

Active Publication Date: 2022-03-01
安徽马钢张庄矿业有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the tailing sand produced after multi-stage grinding and sorting in production is very fine in size, and it is not easy to settle during dehydration; Sedimentation and other technologies dehydrate low-concentration ultra-fine tailings. This dehydration operation has many steps, and the water content of the prepared tailings is relatively high, about 20%. Concentration and dehydration process" Invention patent application discloses a method of dehydrating ultra-fine tailings through five main unit operations of stirring, slag separation, flocculation, concentration and pressure filtration, which can effectively settle low-concentration ultra-fine tailings Dehydration, and the water content of the filter cake is 15.10% by weight, but the method of adding flocculant to dehydrate the low-concentration ultra-fine tailings requires time to mix the flocculant and a lot of time to stir, which is complicated and cumbersome. It takes 3-4 hours to prepare the 7 kg flocculant disclosed in the method, which greatly reduces the production efficiency. At the same time, a large amount of flocculant is required for a large amount of tailings treatment, resulting in a waste of resources. Therefore, a new kind of flocculant is urgently needed on the market. Solution to the technical problem

Method used

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  • A method for dehydrating low-concentration ultra-fine tailings

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Embodiment 1

[0029] In the target tailings mortar to be treated, 95% of the tailings have a particle size of less than 200 mesh, 60% of the tailings have a particle size of less than 400 mesh, and 18% of the tailings have a particle size of less than 500 mesh; put the tailings mortar into a φ3×3m mixing tank, and stir Adjust the slurry to suspend the solids in the tailing sand mortar; the mortar after slurry adjustment is screened by a high-frequency vibrating sieve for solid-liquid screening, and the screen mesh is 500 mesh; after being screened by a high-frequency vibrating sieve, the water content of the tailing sand is 16.30% by weight %; The motor power of 5.5kw is selected for the hoisting machine, the power of fan is 2.2kw, and the power of electric heating is 40kw. Feed into the hoisting machine, the tailings are thrown upwards from the discharge port under the action of the hoisting machine, the hot air blower blows hot air along the throwing direction, and the water in the tailing...

Embodiment 2

[0031] In the target tailings mortar to be treated, 95% of the tailings particle size is less than 200 mesh, 80% of the tailings particle size is less than 400 mesh, and about 20% of the tailings particle size is less than 1250 mesh (10 microns); feed the tailings mortar into φ3× The 3m mixing tank is used to stir and adjust the slurry to suspend the solids in the tailing sand mortar; the mortar after slurry adjustment is screened by high-frequency vibrating sieve for solid-liquid screening, and the high-frequency vibrating sieve screen is specially customized, and the mesh of 2000 mesh is selected; After vibrating screen screening, the water content of tailings is 18.10% by weight; the hoisting machine adopts a motor power of 5.5kw, the hot air fan adopts a fan power of 2.2kw, and an electric heating power of 40kw, and the hoisting machine is placed inside the container (40 feet container) One end of the container, and the outlet is facing the other end of the container. The h...

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Abstract

The invention discloses a method for dehydrating low-concentration ultra-fine tailings, which relates to the field of tailings dehydration technology. In order to solve the problem that the existing low-concentration ultra-fine tailings dehydration method has many operating steps and can be obtained without using a flocculant The tailing sand contains more water; the present invention includes step 1: stirring the tailing sand mortar to suspend the sediment; step 2: separating the suspended tailing sand mortar from solid and liquid through a high-frequency vibrating screen; The solid phase part of the tailings is thrown by the hoisting machine, and at the same time, a hot air blower is used to blow hot air along the throwing direction of the hoisting machine; Step 4: Collect the tailings thrown by the hoisting machine; the present invention does not need to use a flocculant, and can be simply Efficiently realize the dehydration of low-concentration ultra-fine tailings.

Description

technical field [0001] The invention relates to the field of tailings dehydration technology, in particular to a method for dehydrating low-concentration ultrafine tailings. Background technique [0002] Low-concentration ultra-fine tailings refers to tailings with a particle size of less than 200 mesh and a weight concentration of less than 10%. The comprehensive utilization rate of industrial solid waste in my country is about 60%, while the average comprehensive utilization rate of tailings is less than 10%. Tailings have become the solid waste with the largest industrial output and the lowest comprehensive utilization rate in my country. At present, research on the comprehensive utilization of tailings at home and abroad mainly focuses on tailings re-selection, production of building materials, use in making fertilizers, filling mine goafs, and tailings reclamation. In the construction industry, tailings sand can be used for road ballast, free Sintered tailings bricks, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D33/03F26B3/06F26B21/00
CPCB01D33/03F26B3/06F26B21/001
Inventor 齐美超吴红汪文良吴新义陈五九陈伟余剑李保健王玉富潘井彦孙春海石刚潘猛
Owner 安徽马钢张庄矿业有限责任公司