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Treatment technology of ore dressing alkaline tail water

A technology for treating process and tail water, which is applied in the field of processing alkaline tail water of ore dressing, can solve problems such as difficult operation, high treatment cost, and low safety, and achieve low requirements for operation details, simple process flow, and low process cost low effect

Inactive Publication Date: 2019-01-18
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of neutralizing alkaline tailings water in mineral processing plants is to add sulfuric acid, which has high processing costs, low safety, prone to accidents, and is not easy to operate. It has very high requirements for technical personnel to operate details, and is not suitable for large-scale implementation.

Method used

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  • Treatment technology of ore dressing alkaline tail water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The pyrite used is the sulfur concentrate of a concentrator containing 43% S, with a fineness of -0.037mm accounting for 33.84%; the alkaline water to be treated is artificially prepared lime water, with 15g of analytically pure CaO in 2L of water, and a pH value of 12 .

[0031] The above-mentioned alkaline water is passed through the following process steps:

[0032] (1) Grinding 500g of pyrite, the fineness of the grinding product is -0.037mm accounting for 99%, the grinding water is prepared lime water, and the weight ratio of water to mineral is 1:1;

[0033] (2) Pour the finely ground pyrite slurry into a 5L mechanical mixing tank, add the prepared lime water, and the weight ratio of water to mineral is 4:1;

[0034] (3) Stir the pulp, and the pH value of lime water decreases with the increase of stirring time;

[0035] Technical indicators: Lime water with a pH value of 12 is stirred and neutralized by pyrite for 1 hour, and the pH value drops to 7.

Embodiment 2

[0037] The pyrite used is the sulfur concentrate of a concentrator containing 43% S, with a fineness of -0.037mm accounting for 33.84%; the alkaline water to be treated is artificially prepared lime water, with 15g of analytically pure CaO in 2L of water, and a pH value of 12 .

[0038] The above-mentioned alkaline water is passed through the following process steps:

[0039] (1) Grinding 500g of pyrite, the fineness of the grinding product is -0.037mm accounts for 70%, the grinding water is prepared lime water, and the weight ratio of water and mineral is 1:1;

[0040] (2) Pour the finely ground pyrite slurry into a 5L mechanical mixing tank, add the prepared lime water, and the weight ratio of water to mineral is 4:1;

[0041] (3) Stir the pulp, and the pH value of lime water decreases with the increase of stirring time;

[0042] Technical indicators: Lime water with a pH value of 12 is stirred and neutralized by pyrite for 1 hour and 20 minutes, and the pH value drops to ...

Embodiment 3

[0044]The pyrite used is the sulfur concentrate of a concentrator containing 30% S, with a fineness of -0.037mm accounting for 33.84%; the alkaline water to be treated is artificially prepared lime water, and 7.5g of analytically pure CaO is added to 2L of water. pH 9.

[0045] The above-mentioned alkaline water is passed through the following process steps:

[0046] (1) Grinding 500g of pyrite, the fineness of the grinding product is -0.037mm accounts for 70%, the grinding water is prepared lime water, and the weight ratio of water and mineral is 1:1;

[0047] (2) Pour the finely ground pyrite slurry into a 5L mechanical mixing tank, add the prepared lime water, and the weight ratio of water to mineral is 4:1;

[0048] (3) Stir the pulp, and the pH value of lime water decreases with the increase of stirring time;

[0049] Technical indicators: Lime water with a pH value of 12 is stirred and neutralized by pyrite for 40 minutes, and the pH value drops to 7.

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Abstract

The invention discloses a treatment technology of ore dressing alkaline tail water. The treatment technology of the ore dressing alkaline tail water is used for treating the ore dressing alkaline tailwater by utilizing cheap pyrite and specifically comprises the following steps: carrying out ore grinding on the pyrite until the pyrite with the fineness of -0.037mm accounts for 50 percent or more,so as to obtain a material a; adding the material a into the ore dressing alkaline tail water needing to be treated, stirring at 5 to 50 DEG C and reacting for 0.5 to 3h to obtain a reaction solutionb; carrying out solid-liquid separation on the reaction solution b to obtain settled sand c and reclaimed water capable of being circularly utilized. The treatment technology of the ore dressing alkaline tail water, provided by the invention, has the advantages of low cost, high safety and easiness for operation; the requirements on operational details of technical staff are low and the treatmenttechnology is suitable for large-scale popularization and application, so that the possibility of large-scale implementation is solved radically. Aiming at the alkaline tailing water of a current oredressing factory, the treatment technology adopting the technical scheme has a simple technological flow; the pyrite with the low price is adopted and any medicament does not need to be added; national clean production and circular economy policies are met and the aim of comprehensive utilization of resources is realized.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment process for ore dressing alkaline tail water. Background technique [0002] Lead-zinc sulfide ore is often associated with pyrite. Using lime as an inhibitor for the separation of lead and zinc minerals from pyrite to obtain qualified lead and zinc concentrates is a conventional method used in mineral processing plants. This method makes the tailings water alkaline. The more pyrite in the lead-zinc ore, the greater the amount of lime required for separation, which makes the tailings water more alkaline (high pH) and difficult to reuse directly. It is necessary to add A large amount of sulfuric acid is neutralized. [0003] The utility model patent with publication number CN207567016U provides a water treatment device and method for highly alkaline circulating water, which is suitable for the treatment of highly alkaline water. In this util...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66
CPCC02F1/66
Inventor 张曙光简胜闫森谢峰吕超
Owner KUNMING METALLURGY INST
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