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Method for treating goaf by harmlessly filling phosphate tailings

A technology for phosphate tailings and goafs, applied in chemical instruments and methods, separation methods, ground mining, etc., can solve the problems of poor dewatering effect of high-efficiency automatic filter presses and the inability to directly pile tailings, and achieve safety and environmental protection. Simple and feasible, reduce storage costs, and have the effect of continuous and stable discharge

Pending Publication Date: 2022-05-20
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (3) After dehydration, the tailings cannot be directly stacked in the open pit, and the open pit is filled and treated
[0014] (3) After dehydration, the tailings cannot be directly stacked in the open pit, and the open pit is filled and treated
[0015] (4) After the pulp is thickened, the concentration is only increased to about 25%, and the dehydration effect of the subsequent high-efficiency automatic filter press is poor

Method used

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  • Method for treating goaf by harmlessly filling phosphate tailings

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, a method for harmless filling of phosphorous tailings to control gobs, the steps are as follows:

[0032] (1) Use the following method to treat phosphorus tailings as general industrial solid waste Class I: the tailings slurry produced by the phosphate rock flotation plant is thickened to a mass concentration of 58% through a thickener, and quicklime or milk of lime is added to the tailings slurry to lower its pH value. Adjust to neutral, thicken to a mass concentration of 55%, and then transport it to the slurry storage tank of the tailings filtration system through pipelines, and then transport it to the filter for primary filtration to obtain a primary filter cake with a moisture content of 13%, which is then transported to the pulping Slurry for pulping, add 5 times the water content of the primary filter cake, stir for 20 minutes, pulp to a concentration of 40%, and then transport to the filter for secondary filtration to obtain a secondary filter cake...

Embodiment 2

[0036] Embodiment 2, a method for harmless filling of phosphorus tailings to treat gobs, the steps are as follows:

[0037](1) Use the following methods to treat phosphorus tailings as general industrial solid waste Class I: the tailings slurry produced by the phosphate rock flotation plant is thickened to a mass concentration of 55% through a thickener, and quicklime or milk of lime is added to the tailings slurry to lower its pH value. Adjust to neutral, thicken to a mass concentration of 55%, and then transport it to the slurry storage tank of the tailings filtration system through pipelines, and then transport it to the filter for primary filtration to obtain a primary filter cake with a moisture content of 13%, which is then transported to the pulping trough for slurry mixing, add clear water 5 times the water content in the primary filter cake, stir for 30 minutes, adjust the slurry to a concentration of 47%, and then transport it to a filter for secondary filtration to o...

Embodiment 3

[0041] Embodiment 3, a method for harmless filling of phosphorous tailings to treat gobs, the steps are as follows:

[0042] (1) Use the following methods to treat phosphorus tailings as general industrial solid waste Class I: the tailings slurry produced by the phosphate rock flotation plant is thickened to a mass concentration of 56% through a thickener, and quicklime or milk of lime is added to the tailings slurry to lower its pH value. Adjust to neutral, thicken to a mass concentration of 53%, and then transport it to the slurry storage tank of the tailings filtration system through pipelines, and then transport it to the filter for a primary filtration to obtain a primary filter cake with a moisture content of 15%, which is then transported to the pulping trough for slurry mixing, add clear water 5 times the water content of the primary filter cake, stir for 25 minutes, adjust the slurry to a concentration of 40%, and then transport it to a filter for secondary filtration ...

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Abstract

The invention relates to a method for treating a goaf by harmlessly filling phosphate tailings, which comprises the following steps of: treating the phosphate tailings into general industrial solid wastes I, thickening tailing slurry generated by a phosphate ore flotation plant as a raw material, adding quick lime or lime milk to adjust the pH value to be neutral, and filtering twice to obtain filtrate I; and adding the filtrate subjected to secondary filtration into the obtained filter cake, and adjusting to a paste state to obtain the phosphate tailing paste for filling the open pit to realize treatment and ecological restoration of the open pit. According to the method, the tailing pulp generated by the phosphorite flotation plant can be treated into the I-type solid waste, tailing stockpiling can be carried out without newly building a tailing pond, under the condition that the state does not approve the newly building of the tailing pond, the treated tailings reaching the I-type solid waste discharge standard can be used for carrying out filling treatment on an open pit, and the economic benefit is high. And the potential safety hazard of the open pit is eliminated on the premise of innocent treatment of the phosphate tailings.

Description

technical field [0001] The invention relates to a method for treating phosphorus tailings, in particular to a method for harmlessly filling and treating goafs with phosphorus tailings. Background technique [0002] The treatment of phosphorus tailings after flotation has always been a difficult problem. At present, relevant domestic enterprises mainly carry out wet or dry discharge of tailings through the construction of tailings ponds. Regardless of whether wet drainage or dry drainage is used, with the expansion of the mining scale of phosphate mines and the extension of mine service life, the capacity of tailings ponds decreases year by year, and the construction and operation management costs of tailings ponds continue to increase. Serious potential safety hazards, the possibility of dam failure, seriously threaten the lives and property safety of people around the reservoir area. [0003] However, some open-pit phosphate mines in Yunnan, Guizhou and other places in Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/32B01D36/04
CPCE21C41/32B01D36/04Y02W30/91
Inventor 胡顺发陈兆荣王相凯刘大鹏胡涛
Owner BLUESTAR LEHIGH ENG INST CO LTD
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