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Method for performing in situ treatment on acid mine water by using crop seed husks

A technology of in-situ treatment and crops, applied in mining equipment, mining equipment, earth drilling and mining, etc., can solve the problems of poor practicability, groundwater pollution, high cost, etc., and achieve the effect of low price, not easy to decompose, and low cost of use

Inactive Publication Date: 2013-10-23
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These agents are temporarily effective in reducing sulfate oxidation and acidity, but they are not very practical for mines, because the active agent itself will be decomposed, and the cost of continuous dosing in large areas of mines is very high, and it also pollutes groundwater

Method used

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  • Method for performing in situ treatment on acid mine water by using crop seed husks
  • Method for performing in situ treatment on acid mine water by using crop seed husks
  • Method for performing in situ treatment on acid mine water by using crop seed husks

Examples

Experimental program
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Effect test

Embodiment 1

[0058] A method for in-situ treatment of acidic water in mines using crop seed husks, comprising the steps of:

[0059] (1) Detect the crack surface or acid generation point where acidic water seeps out of the mine;

[0060] (2) Preparation of bioinhibitor: cut and grind the longan shell into a powder with a particle size of 80 mesh, then add 20g / L of white latex special modified starch and water to prepare a bioinhibitor with a pH value of 7 agent; wherein the mass volume ratio of longan shells in the biological inhibitor is 10g / L;

[0061] (3) On the crack surface or the acidic water surface at the acid production point, use the biological inhibitor in (2) to spray or brush the inhibitor layer with a thickness of 3 mm, repeat twice, and the inhibitor layer will fully cover the crack Noodles or acid-generating points are suitable;

[0062] (4) Preparation of alkaline flocculation mixture: 10% Na(OH) solution and anionic polyacrylamide are mixed evenly at a volume ratio of 1...

Embodiment 2

[0065] A method for in-situ treatment of acidic water in mines using crop seed husks, comprising the steps of:

[0066] (1) Detect the crack surface or acid generation point where acidic water seeps out of the mine;

[0067] (2) Preparation of bioinhibitor: cut and grind walnut shells into a powder with a particle size of 200 mesh, then add 30g / L of white latex special modified starch and water to prepare a bioinhibitor with a pH value of 7.5 agent; the mass volume ratio of walnut shells in the biological inhibitor is 3g / L;

[0068] (3) On the crack surface or the acidic water surface at the acid production point, use the biological inhibitor in (2) to spray or brush the inhibitor layer with a thickness of 4mm, repeat three times, and the inhibitor layer will fully cover the crack Noodles or acid-generating points are suitable;

[0069] (4) Preparation of alkaline flocculation mixture: 10% Na(OH) solution and anionic polyacrylamide are mixed evenly at a volume ratio of 1000:...

Embodiment 3

[0072] A method for in-situ treatment of acidic water in mines using crop seed husks, comprising the steps of:

[0073] (1) Detect the crack surface or acid generation point where acidic water seeps out of the mine;

[0074] (2) Preparation of bio-inhibitors: Tea seed shells were cut and ground into powders with a particle size of 60 mesh, and then 50 g / L of white latex-specific modified starch and water were added to prepare bio-inhibitors with a pH value of 8. Inhibitor; the mass-to-volume ratio of the tea seed husk in the biological inhibitor is 3g / L;

[0075] (3) On the surface of the acidic water at the crack surface or acid production point, use the biological inhibitor in (2) to spray or brush a layer of inhibitor layer with a thickness of 5 mm. The inhibitor layer can fully cover the crack surface or acid production point. point is appropriate;

[0076] (4) Preparation of alkaline flocculation mixture: mix 10% Na(OH) solution and anionic polyacrylamide in a volume ra...

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Abstract

The invention provides a method for performing in situ treatment on acid water of a mine by using crop seed husks. The method comprises the steps that an acid generation point or a fissure surface where the acid water seeps in a mine shaft is detected; a biological inhibitor and alkali flocculation mixed liquor are prepared; the surface of the acid water of the mine shaft is sprayed by the biological inhibitor or subjected to brushed in batch; and continuous seepage of the acid water in the shaft can be eliminated by spraying the alkali flocculation mixed liquor onto an inhibitor layer at intervals for 1-3 times finally. According to the method, the oxidative activity of acidophilic bacteria in an acid water generation environment is inhibited by the biological inhibitor, generation of the acid water is slowed down or inhibited, and the alkali flocculation mixed liquor is used for spraying continuously to form ferric oxide or ferric hydroxide flocculent settling to form a protective film on the surface of pyritic sulfide, so that the acid water generated due to biological and chemical oxidation of sulfur-bearing minerals is avoided completely. The method has the advantages that waste is recycled, neither poison nor secondary pollution to an environment is caused, and the method is low in cost and simple to apply and operate.

Description

technical field [0001] The invention relates to the technical field of prevention and control of acidic water in underground mines, in particular to an in-situ treatment method for acidic water in underground mines. Background technique [0002] Since the mine stratum contains 1%-20% pyrite (including marcasite, etc.) and organic sulfur, it becomes an important release source of acid-mine drainage (AMD, Acid-mine drainage) in coal mines. After the mining of the ore seam is disturbed, the oxygen-containing water on the surface will seep in intermittently and react with sulfide minerals such as pyrite in the formation rocks to form Fe 2+ with H + , when Fe 2+ continue to be oxidized to Fe 3+ when Fe 3+ Then it becomes an important oxidizing agent for pyrite oxidation, and its rate of oxidation and acid production is higher than that of dissolved oxygen. At this time, dissolved oxygen and Fe 3+ Synergistically oxidize together, promote each other, and accelerate the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00
Inventor 岳梅李玉晖邓呈逊丁海涛唐中亚李园园
Owner HEFEI UNIV
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