CN105923660A - Treatment method of tailings slurry - Google Patents
Treatment method of tailings slurry Download PDFInfo
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- CN105923660A CN105923660A CN201610201439.XA CN201610201439A CN105923660A CN 105923660 A CN105923660 A CN 105923660A CN 201610201439 A CN201610201439 A CN 201610201439A CN 105923660 A CN105923660 A CN 105923660A
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- ore pulp
- mine tailing
- inhibitor
- slurry
- tailing ore
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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Abstract
The invention relates to the technical field of mineral separation waste processing, and in particular to a treatment method of acidic tailings slurry. The method comprises the following steps: adding an inhibitor into a tailing slurry from pyrite beneficiation and mixing. The absolute dry weight of the tailing pulp to the weight of the inhibitor ratio is 1:0.5-5; and the inhibitor is obtained by mixing and crushing one or more of plant seeds, fruit shell and fruit core. The material containing plant polyphenol is added to pyrite tailing slurry as the inhibitor, the polyphenol can effectively inhibit the catalytic oxidation acid production reaction of microorganism Thiobacillus ferrooxidans in the pulp, so as to effectively reduce the dissolution rate of Fe<2+> in the tailings slurry, and pH value decrease rate of the tailings slurry. The method can effectively guarantee the reliable storage of tailing slurry, and reduce the difficulty of slurry concentration and other subsequent process.
Description
Technical field
The invention belongs to chemical technology field, be specifically related to the processing method of a kind of mine tailing ore pulp.
Background technology
Mine tailing be mine ore dressing produce in by Ore crush, levigate, sort, valuable mineral is made remaining to dump thing after extracting, its composition is the fine particle of rock, and these tiny granule mine tailings are many to be existed with slurry form, the most also referred to as mine tailing ore pulp.In prior art, the mine tailing ore pulp produced for ore dressing, typically it mostly is to be transported in tailings impoundment system concentrate by Sending tailings to store up.Along with developing rapidly of industrial economy, the demand day also benefit of mineral resources is increased by the mankind, and the pressure that environment is caused by this mine tailing ore pulp allowing for storing up in a large number increases day by day.
At present, the processing method of mine tailing ore pulp has multiple, as mine tailing is carried out concentration, to reduce heap high-volume；The dosing coagulant clarifying process with acceleration mine tailing is added in mine tailing, outer row after then being processed by primary water, the most equally plays reduction tailing heap purpose high-volume.But, the metal ion content in mine tailing ore pulp is higher, and particularly ferrum, manganese plasma exists with multiple valence state form.Such as, for pyrite, it is mainly composed of FeS2, it certainly exists substantial amounts of FeS when exploitation in produced mine tailing2, and the FeS in mine tailing2The chemical reaction that can occur is as follows:
FeS2+3.5O2+H2O→Fe2++2SO4 2-+2H+ (1)
Fe2+→Fe3+ (2)
FeS2+14Fe3++8H2O→15Fe2++2SO4 2-+16H+ (3)
From the reactions above it can be seen that Fe in formula3+And O2All there is Oxidation of Fe S2Ability, and by relative analysis we be not difficult to find out, O2To FeS2Oxidability not as good as Fe3+.It is to say, FeS2Oxidation be mainly by Fe3+Complete: be first the Fe in mine tailing2+It is oxidized to Fe3+(see formula 2), the FeS being followed by mine tailing2At Fe3+Effect oxidized make more Fe2+It is dissolved in mine tailing ore pulp (see formula 3).But, as shown in reaction equation 1 and 3, either which kind of mode Oxidation of Fe S2, the most produced H+The pH value of mine tailing ore pulp can be reduced, be allowed in acidity, the most produced heavy metal ion Fe2+It is dissolved in ore pulp the intractability strengthening postorder ore pulp.
Showing it addition, analyze after deliberation, containing thiobacillus ferrooxidant in pyrite, this microorganism can be catalyzed Fe under aerobic conditions2+It is oxidized to Fe3+, and its catalysis Oxidation of Fe2+Speed be O2The 10 of oxidation6Times, it can be seen that, under ferrous Thiobacillus aerobic conditions, there is the carrying out promoting reaction (3), i.e. accelerate FeS2Oxidation, that is the existence of thiobacillus ferrooxidant can accelerate Fe in mine tailing ore pulp2+Dissolution rate and the decrease speed of pH value, thus pile up to the safety of mine tailing ore pulp and the concentration etc. of postorder processes and increases difficulty.
Summary of the invention
It is an object of the invention to provide the processing method of the mine tailing ore pulp of a kind of low cost, the method can effectively suppress Fe in the decrease speed of slurry pH and ore pulp2+Dissolution rate.
For achieving the above object, the technical solution used in the present invention is: the processing method of a kind of mine tailing ore pulp, and its step is as follows:
A kind of processing method of mine tailing ore pulp, its step is as follows: add inhibitor mixed in the mine tailing ore pulp that pyrite ore dressing produces, the absolute dry mass of mine tailing ore pulp and the mass ratio of inhibitor are 1:0.5-5, and described inhibitor is to be obtained by after one or more the blended pulverizing in the seed of plant, fruit cot and fruit nucleocapsid.
Actually, containing plant polyphenol in described inhibitor, plant polyphenol is the polyphenols that a class is widely present in plant, and the content in plant is only second to cellulose, hemicellulose and lignin, and plant polyphenol is primarily present in the skin of plant, root, wood, leaf, fruit.Ortho position phenolic hydroxyl group in the phenolic hydroxyl structure of plant polyphenol is easily oxidized into quinones structure, this oxidizing process not only can consume the oxygen in environment, and the free radicals such as active oxygen are had the strongest capturing ability, this makes polyphenol have stronger non-oxidizability and remove the ability of free radical.Simultaneously, polyphenol can be with protein bound, the protoplasm in microbial body can be made to solidify, there is antiviral, antidiarrheal, suppression carcinogen and tumor, suppression lipid and the multiple biological activity such as the peroxidation of other materials and anti-AIDS effect, and plant polyphenol and Cu2+、Zn2+Deng the complexation of metal ion, the metalloenzyme activity containing these ions can be made to be suppressed, concrete, polyphenol and high volence metal ion such as Cr6+、Fe3+Metal ion can be reduced to lower valency from high-valence state Deng while effect complexation, theoretical based on this, the material containing plant polyphenol such as plant seed, fruit cot and fruit nucleocapsid after applicant will pulverize is added in pyritous mine tailing ore pulp as inhibitor, the catalytic oxidation of microorganism ferrous iron Thiobacillus in ore pulp, that is suppression ferrous Thiobacillus catalysis FeS so can be effectively suppressed by polyphenol effect therein2Aoxidize, thus effectively reduce Fe in mine tailing ore pulp2+Dissolution rate and the decrease speed of pH value of mine tailing ore pulp, show the most respectively simultaneously, the addition of inhibitor can also suppress the dissolution of the metal ions such as Cu, Cr, Pb, Zn in mine tailing ore pulp.Moreover, possibly together with a certain amount of alkaloid in the seed of plant, shell, therefore join in mine tailing ore pulp as inhibitor after being pulverized, acid mine tailing ore pulp can also be played acid neutralization, thus be further ensured that the mine tailing ore pulp stored up will not go bad within a certain period of time, thus the reliable treatments of the waste water produced after facilitating the concentration of ore pulp or flocculation sediment.
As further preferred version: the absolute dry mass of mine tailing ore pulp and the mass ratio of inhibitor are 1:3-5, tests prove that, in mine tailing ore pulp, add inhibitor according to aforementioned proportion and both can ensure that inhibitor was maximally utilized so that the catalytic action of the ferrous Thiobacillus in mine tailing ore pulp is effectively suppressed.
Preferably, described inhibitor is to be obtained the most after crushed by walnut shell, Pericarpium Longan, Pericarppium arachidis hypogaeae, chestnut shell or camellia oleosa seed, polyphenol content in these plant materials is high, having certain stabilization time in its natural state, the water quality that can be prevented effectively from mine tailing ore pulp during use deteriorates.
Further, described inhibitor crosses 100-150 mesh sieve, is sufficiently mixed with mine tailing ore pulp ensuring a suppression of agent；It addition, the moisture content of mine tailing ore pulp is between 30%-50%.
Accompanying drawing explanation
Fig. 1-5 is pH, the Fe of the mine tailing ore pulp being interpolation walnut shell powder respectively2+、Zn2+、Cu2+、SO4 2-28 days changing trend diagrams；
Fig. 6-10 is pH, SO of three groups of mine tailing ore pulps respectively4 2-、Fe2+、Zn2+、Cu2+28 days changing trend diagrams.
Detailed description of the invention
For clearer explanation technical scheme disclosed in this invention, it is further described by the following examples.
Embodiment 1:
Collect walnut shell, it was crushed to 100 mesh sieves, then according to 7 groups of numerical value are put in the mine tailing ore pulp that pyrite ore dressing is discharged respectively disclosed in table 1, produce when described mine tailing ore pulp takes from the pyrite ore dressing in Lujiang, Anhui Hejia-Xiaoling ore deposit, in each experimental group the volume of mine tailing ore pulp be 106ml, moisture content be 30%, absolute dry mass 1g.
Table 1 mine tailing ore pulp adds the qualitative data of walnut shell powder
| Experiment numbers | Walnut shell powder/g |
| 1 | 0 |
| 2 | 0.5 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 4 |
| 7 | 5 |
The mine tailing ore pulp obtaining above-mentioned 7 groups of tests carries out the content detection of pH value and ion respectively, result is as shown in accompanying drawing 1-5, in conjunction with Fig. 1-5 it can be seen that count with the absolute dry mass of mine tailing ore pulp for 1g, when adding 3-5g walnut shell powder to Fe in the decline of the pH of mine tailing ore pulp and mine tailing ore pulp2+、Zn2+、Cu2+、SO4 2-Dissolution there is good inhibiting effect, and walnut shell powder is little on the difference of the impact of the pH value of mine tailing ore pulp in the range of this interpolation, therefore comprehensive cost of material and action effect consider, prioritization scheme be the ratio between the quality addition of walnut shell powder in mine tailing ore pulp and the absolute dry mass of mine tailing ore pulp be 3:1.Wherein, the core 0.5:1 of the display in Fig. 1 refers to the ratio of the absolute dry mass of walnut shell powder and mine tailing ore pulp in experimental group, the like.
Embodiment 2:
1) collect walnut shell, be crushed to 150 mesh sieves；
2) taking 30g petroleum ether soak at room temperature 48h (sealing of immersion process preservative film prevents petroleum ether from volatilizing), stir once to avoid the occurrence of precipitation every 12h, then vacuum filtration, distilled water is cleaned, and dries under the conditions of 80 DEG C；
3) adding concentration in the walnut shell powder dried according to the mass volume ratio of 1g:15ml is the ethanol of 50%, 1h is extracted in the ultrasonic cleaner of 50 DEG C, ultrasonic time 15min, ultrasonic power 500W, after extraction, extracting solution is carried out vacuum filtration and obtain filtering residue and filtrate, filtrate is centrifugation under conditions of 3000r/min, collect supernatant, filtering residue is added ethanol and repeats same steps extraction once, merge twice supernatant, under the conditions of 40 DEG C, lower rotation is evaporated to solution without alcohol taste, it is settled to 150mL with ultra-pure water, obtain walnut shell powder ethanol extract, under the conditions of this extracting solution is placed in 4 DEG C, cold preservation is standby.
4) three parts of mine tailing ore pulps are taken, the volume of every part of mine tailing ore pulp is 106ml, moisture content is 50%, absolute dry mass is 1g, take step 1) directly pulverize the walnut shell powder 0.6g obtained and step 3) walnut shell powder ethanol extract 3ml put into wherein in two parts of mine tailing ore pulps respectively, remaining portion is as blank group, and described mine tailing ore pulp produces when taking from the pyrite ore dressing in Lujiang, Anhui Hejia-Xiaoling ore deposit.
5) to step 4) in blank group and add the mine tailing ore pulp of walnut shell powder and walnut shell powder ethanol extract respectively and carry out pH value and ion SO4 2-、Fe2+、Pb2+、Zn2+、Cu2+、Cr2+Content detection, result is as shown in accompanying drawing 6-10:
From fig. 6 it can be seen that the pH change of walnut shell powder interpolation group is basic maintains a stable state, and blank group and the walnut shell powder ethanol extract group pH value range of decrease from initial measurement to 7d when is the most obvious, starts to tend towards stability in 21d afterwards.Compared with blank group, walnut shell powder group and walnut shell powder ethanol extraction group have the effect that suppression slurry pH declines, but walnut shell powder group is better than walnut shell powder ethanol extraction group to the pH value inhibitory action of ore pulp；Complex chart 7-10 is it can be seen that the walnut shell powder interpolation group SO to mine tailing dissolution4 2-And heavy metal ion Fe2+、Zn2+、Cu2+The inhibitory action of concentration is better than walnut shell powder ethanol extract group.Applicant shows through analyzing, walnut shell powder in walnut shell powder ethanol extract have passed through the extraction of petroleum ether, make substantial amounts of alkaloid material dissolution, and lose the neutralization to ore pulp acidity of this moieties, cause walnut shell powder ethanol extract poor to the pH value inhibitory action of ore pulp.Need to illustrate, the walnut shell ethanol group in Fig. 6-10 that is walnut shell powder ethanol extract group, walnut shell powder interpolation group that is walnut shell powder group, CK+That is blank group.
Claims (5)
1. a processing method for mine tailing ore pulp, its step is as follows: produce to pyrite ore dressing
Adding inhibitor mixed in mine tailing ore pulp, the absolute dry mass of mine tailing ore pulp with the mass ratio of inhibitor is
1:0.5-5, described inhibitor is by the one in the seed of plant, fruit cot and fruit nucleocapsid
Or obtain after multiple blended pulverizing.
The processing method of mine tailing ore pulp the most according to claim 1, it is characterised in that: tail
The absolute dry mass of ore deposit ore pulp and the mass ratio of inhibitor are 1:3-5.
The processing method of mine tailing ore pulp the most according to claim 2, it is characterised in that: institute
The inhibitor stated is to be obtained after crushed by walnut shell, Pericarpium Longan, Pericarppium arachidis hypogaeae, chestnut shell or camellia oleosa seed.
4. according to the processing method of the mine tailing ore pulp described in claim 1 or 2 or 3, its feature
It is: described inhibitor crosses 100-150 mesh sieve.
The processing method of mine tailing ore pulp the most according to claim 4, it is characterised in that: tail
The moisture content of ore deposit ore pulp is between 30%-50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610201439.XA CN105923660A (en) | 2016-03-31 | 2016-03-31 | Treatment method of tailings slurry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610201439.XA CN105923660A (en) | 2016-03-31 | 2016-03-31 | Treatment method of tailings slurry |
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| CN105923660A true CN105923660A (en) | 2016-09-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107954492A (en) * | 2017-12-08 | 2018-04-24 | 合浦县水利局 | Sewage-treating agent of various heavy and preparation method thereof in water can be removed |
| CN109231402A (en) * | 2018-10-15 | 2019-01-18 | 昆明冶金研究院 | A kind for the treatment of process of ore dressing alkalinity tail water |
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| US20080230094A1 (en) * | 2007-03-23 | 2008-09-25 | Buckman Laboratories International, Inc. | Method to inhibit growth of microorganisms in aqueous systems and on substrates using persulfate and a bromide |
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| CN102786133A (en) * | 2011-05-20 | 2012-11-21 | 中国科学院广州地球化学研究所 | Stepwise precipitation process for recovering iron/copper resource in acid mine waste water |
| CN102583619A (en) * | 2012-01-19 | 2012-07-18 | 靖德兵 | Method for removing heavy metal in water by utilizing plant-biomass composite adsorbent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107954492A (en) * | 2017-12-08 | 2018-04-24 | 合浦县水利局 | Sewage-treating agent of various heavy and preparation method thereof in water can be removed |
| CN109231402A (en) * | 2018-10-15 | 2019-01-18 | 昆明冶金研究院 | A kind for the treatment of process of ore dressing alkalinity tail water |
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Application publication date: 20160907 |