CN100500890C - Plant arsenic-extraction pretreatment method for lowering smelting selection cost of high-arsenic gold ore - Google Patents
Plant arsenic-extraction pretreatment method for lowering smelting selection cost of high-arsenic gold ore Download PDFInfo
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- 229910052737 gold Inorganic materials 0.000 title claims abstract description 117
- 239000010931 gold Substances 0.000 title claims abstract description 117
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 238000003723 Smelting Methods 0.000 title claims abstract description 13
- 229910052785 arsenic Inorganic materials 0.000 title claims description 108
- 238000002203 pretreatment Methods 0.000 title abstract description 7
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- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 2
- PHQZBZMHGMACLH-UHFFFAOYSA-N C(CCC(=O)O)(=O)O.C(CCC(=O)O)(=O)O.C(C)NCC Chemical compound C(CCC(=O)O)(=O)O.C(CCC(=O)O)(=O)O.C(C)NCC PHQZBZMHGMACLH-UHFFFAOYSA-N 0.000 claims description 2
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 2
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- 239000004202 carbamide Substances 0.000 claims description 2
- MPYDICYHUNOOFV-UHFFFAOYSA-N disodium azane Chemical compound N.N.[Na+].[Na+] MPYDICYHUNOOFV-UHFFFAOYSA-N 0.000 claims description 2
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- 150000003839 salts Chemical class 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- VJRVSSUCOHZSHP-UHFFFAOYSA-N [As].[Au] Chemical compound [As].[Au] VJRVSSUCOHZSHP-UHFFFAOYSA-N 0.000 claims 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims 1
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- 238000005507 spraying Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 14
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- 239000000126 substance Substances 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
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- 229910052742 iron Inorganic materials 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- IWTBJGFSGXIPGW-UHFFFAOYSA-N O[N+]([O-])=O.OS(O)(=O)=O.O[Cl](=O)(=O)=O Chemical compound O[N+]([O-])=O.OS(O)(=O)=O.O[Cl](=O)(=O)=O IWTBJGFSGXIPGW-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 description 2
- 229910052964 arsenopyrite Inorganic materials 0.000 description 2
- 229940116901 diethyldithiocarbamate Drugs 0.000 description 2
- LMBWSYZSUOEYSN-UHFFFAOYSA-N diethyldithiocarbamic acid Chemical compound CCN(CC)C(S)=S LMBWSYZSUOEYSN-UHFFFAOYSA-N 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
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- 206010017533 Fungal infection Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
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- 208000031888 Mycoses Diseases 0.000 description 1
- 235000019082 Osmanthus Nutrition 0.000 description 1
- 241000333181 Osmanthus Species 0.000 description 1
- 241000737257 Pteris <genus> Species 0.000 description 1
- 241000244423 Pteris cretica Species 0.000 description 1
- 241000737259 Pteris vittata Species 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- CUGMJFZCCDSABL-UHFFFAOYSA-N arsenic(3+);trisulfide Chemical compound [S-2].[S-2].[S-2].[As+3].[As+3] CUGMJFZCCDSABL-UHFFFAOYSA-N 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
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- 239000005648 plant growth regulator Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- 125000000101 thioether group Chemical group 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Fertilizers (AREA)
- Cultivation Of Plants (AREA)
Abstract
The present invention relates to botanic As extracting pre-treatment process resulting in lowered separating and smelting cost of high-As gold ore. The process includes planting ciliate desert grass onto arsenical gold ore substance to absorb As, and cutting ciliate desert grass growing to 40-60 cm height while leaving 3-5 cm height stubble for further growth. The process can lower the As content in gold ore to below 120 mg/kg, and has the advantages of great As absorbing amount and capacity of preventing soil and water loss and beautifying environment.
Description
One, technical field
The present invention relates to the plant that a kind of reduction contains high arsenic difficult-treating gold mine smelting selection cost and carry the arsenic pretreatment process.Be a kind of be means with the plant extract, remove and reduce the method for gold mine arsenic content.
Two, background technology
There is abundant gold mining deposits in China, but belongs to difficult-treating gold mine greatly, and it is meant the ore that can not leach most of gold through fine grinding with the cyanide process of routine effectively.Contain high arsenic, the high-sulfur refractory gold ore is a kind of resource with strategic importance owing to be difficult to reclaim, still can not big area develop so far with common gold-leaching technology.There is more than 700 ton to belong to difficulty and soak and contain arsenic sulfide gold mine in the gold reserve that China has found at present approximately,, will exploit 4300 tons of arsenic and 200,000 tons of pyrite simultaneously according to 1 ton of gold of the every refinement of general method.And processing cost improves greatly, arsenic in this class Gold Ore average content all about 1%～3%.Will reduce the difficulty and the efficient of cyanide gold-leaching so greatly.Simultaneously also will increase the smelting selection cost of gold mine greatly.
Extraction of gold by cyanidation is present industrial most widely used gold extracting method, has 80% all to adopt extraction of gold by cyanidation in the at present newly-built in the world gold mine.Influenced by associated mineral bigger but it puies forward golden efficient.Cyaniding as mineral pair gold such as arsenic, antimony is very harmful, contains arsenic when higher in Gold Ore, and its cyaniding extracting efficiency can descend greatly, the recovery of influence gold.Therefore this class difficult-treating gold mine must carry out pre-treatment.
The human in recent years protection to the space environment of depending on for existence is more and more paid attention to, and national governments are also more and more stricter to the control of trade effluent, waste gas.Contained arsenic is undoubtedly the important source of pollution that gold mine selects smelting, processing in the Gold Ore, and arsenic mineral is handled the whether proper actual application value that will determine this technology.Therefore influence in the factor that gold mine extracts numerous, the interference of arsenic mineral is crucial, is that principal contradiction remains conscientiously to be solved.What gold and arsenic relation was the closest in numerous mineral associations is arsenopyrite, and the isolating effect of golden arsenic has determined the utility value of arsenopyrite gold mine.
In recent years, some special plants of a large amount of enrichment pollutents of portion on the ground---super enriching plant has become the focus of academia's research.Can remove arsenic contamination in the environment effectively by this kind of plant of plantation harvesting.At present found that the plant of enrichment arsenic mostly is the Pteris plant in a large number both at home and abroad.Herba pteridis vittatae (Pteris vittata L.) and Da Ye Herba Pteridis multifidae (Pteris cretica L.) all meet the standard of arsenic super enriching plant.And this two kind of plant is more common in area, osmanthus, Guizhou Province, Yunnan, biomass is also relatively large, plant such plant in the treating refractory As-containing gold ore district, can not cause the exotic species invasion, can also be by harvesting over-ground part and the removal of regularly carrying out root, remove the arsenic in the auriferous ore, carry gold for leaching and get ready.
CN200610048663.6 relates to a kind of plant restoration method of administering lead pollution of soil, this method is by planting Pale Butterflybush Flower in the soil that is subjected to Lead contamination with direct transplanting or seeding method, make it survive growth, and upwards transport and be transported to overground part, harvesting overground part and it is removed when plant strain growth to 100～120cm or Pale Butterflybush Flower over-ground part Pb content reach 1400mg/kg, then can from soil, take away a large amount of lead, thereby reach the purpose of quick improvement lead pollution of soil.It is neutrality or slant acidity that this method will be regulated and control soil acidity or alkalinity, and plants Pale Butterflybush Flower according to the spacing in the rows of 2～4m.
CN01120519.9 relates to a kind of method of administering As polluted soil, present method relates to the method for repairing and administering As polluted soil (comprising wetland) with Herba pteridis vittatae, this method is passed through the arsenic in a large amount of absorbing environmentals of root system of Herba pteridis vittatae, and upwards carries and be transported to overground part.Gather in overground part (toothing 5～10cm height) when plant-growth to 50～80cm height or after growing 5～6 months and it is removed, then can from soil, take away a large amount of arsenic, thereby reach the purpose of quick removing arsenic contamination.For acid soil, then improve the acidity-basicity ph of contaminated soil by methods such as liming or alkaline fertilizers.
Three, summary of the invention
The object of the present invention is to provide a kind of plant that reduces the treating refractory As-containing gold ore smelting selection cost to carry the arsenic pretreatment process.This method be Da Ye Herba Pteridis multifidae or Herba pteridis vittatae are directly transplanted by minute seedling mode or grow up to seedling by the spore breeding practice after be transplanted in the arsenical gold mine matrix, by the arsenic in a large amount of absorption bases of the root system of Da Ye Herba Pteridis multifidae and be transported to overground part; When plant-growth to 30～50cm height, gather in toothing 3-5cm first, continued growth, harvesting, then can from arsenic-bearing gold ore, take away a large amount of arsenic, reduce to 120mg/kg when following, reach the purpose that removes arsenic in the gold mine matrix when arsenic content in the arsenic-bearing gold ore.Leach for the cyaniding of follow-up gold and to lay the foundation.
The present invention finishes by following steps.
Gold Ore is broken into＜particle of 2mm, is tiled into the gold mine hypothallus of 20～40cm thickness, on this gold mine hypothallus according to plant a strain Da Ye Herba Pteridis multifidae or a Herba pteridis vittatae every 10～20cm kind.Can directly transplant or plant, be aided with pouring, fertilising and management in the process, and over-ground part is carried out 2～4 harvestings with modes such as spore cultivations, each harvesting back toothing 3-5cm, last harvesting back gold mine hypothallus arsenic content is reduced to below the 120mg/kg
For the Da Ye Herba Pteridis multifidae, when partly growing to 4～5 months on the ground, it gathers in first, and later every growth harvesting in 3～4 months is once; Or when surpassing 1200mg/kg, gathers in first arsenic content in the Da Ye Herba Pteridis multifidae overground part.Harvesting once when arsenic content surpassed 1200mg/kg in Da Ye Herba Pteridis multifidae or Herba pteridis vittatae overground part later on; Or when growing into 40～60cm, gathers in first the Da Ye Herba Pteridis multifidae.When growing into 40～50cm, gathers in once the Da Ye Herba Pteridis multifidae later on.During harvesting Da Ye Herba Pteridis multifidae over-ground part, answer toothing 3～5cm, promote its root to send out shoot, thereby can keep the ability of continued growth.
Gather in first when it grows to 5～6 months for Herba pteridis vittatae, or when arsenic content in the Herba pteridis vittatae overground part surpasses 1700mg/kg, gather in first.Harvesting when arsenic content surpasses 1700mg/kg in the Herba pteridis vittatae overground part later on-inferior; Or when growing into 50～60cm, gathers in first the Da Ye Herba Pteridis multifidae.When growing into 50～60cm, Herba pteridis vittatae gathers in once later on.During harvesting Herba pteridis vittatae overground part, answer toothing 3～5cm, promote its root to send out shoot, thereby can keep the ability of continued growth.
Utilize Da Ye Herba Pteridis multifidae or Herba pteridis vittatae to the tired characteristic of the ultraproduct of arsenic, by the arsenic in a large amount of absorbing enriched auriferous ores of root system, and it is upwards carried and transfers to overground part, and remove arsenic in the gold mine by the harvesting overground part again, thereby finish arsenic-containing gold ore proposed the arsenic pre-treatment.The Da Ye Herba Pteridis multifidae of plantation or Herba pteridis vittatae can be by adding alkaline fertilizer, biological promotor or inoculation part mycorhiza biology, to accelerate Da Ye Herba Pteridis multifidae or Herba pteridis vittatae root system to the absorbing enriched speed of arsenic in the soil and the speed of growth of plant self.
The pH of control gold mine hypothallus is 7.0～8.0 (neutrality or weakly alkalines).General treating refractory As-containing gold ore mostly is sulfide, so its pH value all be neutrality or alkaline, thus can directly plant, as if the pH value〉8 need apply dilute hydrochloric acid, dilute sulphuric acid etc. and be adjusted to nearly neutrality.For the slant acidity gold mine of minority pH＜7.0, can be regulated by using alkaline matter (as unslaked lime, sodium bicarbonate, sodium cyanide etc.).
By turning over, flatten and measure such as the dry field of pouring water improving the matrix redox potential, make sulfide become instability and oxidation discharges heavy metal, finally increased the content of arsenic in the matrix solution, improve the enrichment transport efficacy of plant arsenic.In addition for the gold mine matrix that is rich in iron, Mn oxide, when increasing the matrix organic content, can suitably reduce redox potential, increase the dissolving of iron, Mn oxide, just be released with the heavy metal ion of iron, Mn oxide absorption or co-precipitation, help the absorption extraction of plant.
In addition, can introduce the success ratio that the part microbial preparation improves fungal infection, promote the symbiosis of mycorrhizal fungi and root system of plant, thereby strengthen the efficient of phytoremediation.Apply plant-growth regulator and promote plant-growth and arsenic accumulation volume.
Gold mine and Da Ye Herba Pteridis multifidae or Herba pteridis vittatae overground part Spectrometric Determination Arsenic Content can be respectively with reference to following methods.The GB measuring method of the total arsenic of mensuration employing soil of the total arsenic of gold mine matrix (standard GB/T17134-1997), after promptly clearing up with nitric acid-sulfuric acid-perchloric acid, the siliver diethyldithiocarbamate spectrophotometry.Plant also adopts nitric acid-sulfuric acid-perchloric acid to clear up, siliver diethyldithiocarbamate spectrophotometry arsenic content.
Except that absorbing enriched amount and biomagnification coefficient and transfer ratio to arsenic, biomass and arsenic migration total amount are to estimate two other important indicator that the arsenic-containing gold ore plant is put forward arsenic pre-treatment potential ability.Biomass is big more, illustrate isometric growth in the phase with identical coefficient of concentration condition under, this plant absorbs the arsenic of removing from arsenic-containing gold ore amount is many more; Arsenic migration total amount is big more, shows under identical planting conditions, and this plant is reduced to arsenic not influence hour used time of direct cyaniding leaching efficiency of arsenic-containing gold ore or influence short more.The biomass of two kind of plant that present method is selected and plumbous migration total amount are all bigger.It is significant that this soaks golden cost for the arsenic removal pre-treatment speed that improves arsenic-containing gold ore and reduction, for the dearsenification process for the treatment of refractory As-containing gold ore provides a kind of economic and practical plant pretreatment process.
Compare advantage and positively effect that the present invention has with known technology:
Compare with known technology, provided by the invention in arsenic-containing gold ore plantation Da Ye Herba Pteridis multifidae or Herba pteridis vittatae, utilize that its biomass is big, vegetative period is short and to the arsenic in the tired a large amount of absorbing enriched gold mines of characteristic of the ultraproduct of arsenic, remove the arsenic of association in the gold mine by the harvesting overground part.The investment and the maintenance cost of this method are low, the big and arsenic migration total amount height of absorbing enriched amount height, biomagnification coefficient with arsenic, but and construction investment is few, running cost is low, vegetative period is short, safeguard simply, also prevention soil and water loss, beautify landscape environment, be a kind of environmentally friendly method, can be widely used in the pre-treatment that contains the higher difficult lixiviate gold mine of arsenic, not influence the characteristics such as cyaniding leaching of follow-up auriferous ore.
Four, embodiment: further specify the solution of the present invention and effect below by embodiment.
Embodiment 1
The arsenic content mean value of certain difficult-treating gold mine is 2%, contains gold grade 7.6g/t.Gold Ore tentatively is broken into＜graininess of 2mm, the thickness gold mine matrix of tiling 40cm, on this gold mine matrix to plant a strain Da Ye Herba Pteridis multifidae every the 10cm kind.Leaf surface trace fertilizer is executed in auxiliary pouring, and fertilizer is that urea or potassium primary phosphate are converted water 15% the liquid fertilizer that becomes to be weight percentage, and applies fertilizer first after it survives, and fertilising in later every month is (to the foliage spray liquid fertilizer) once,, rate of fertilizer application is 100-200ml/m
2Gold mine matrix, the irrigation of watering according to a conventional method by prolonging leaf longevity, increases phytomass.After 5 months, gather in its overground part first, harvesting back toothing 3～5cm.Measure by analysis, arsenic content is reduced to 13274mg/kg by original 19923mg/kg in the gold mine, is equivalent to make the arsenic content in the gold mine to reduce 33.37%.Later every growth was gathered in once in 4 months, and the arsenic content in the Gold Ore then constantly reduces, and reduced to 90mg/kg by the arsenic content of 3 harvesting back gold mine matrix, and harvested material send the waste guaveyard security landfill, or carries out the recycling of arsenic.
Embodiment 2
The gold grade of certain arsenic-containing gold ore is 3.5g/t, on average contain arsenic 1.1%, Gold Ore tentatively is broken into＜graininess of 1mm, the gold mine hypothallus of tiling 20～30cm thickness, at the spacing plantation Da Ye Herba Pteridis multifidae of this ore deposit hypothallus with 15cm, between planting season, carry out the loosening of a matrix and turn over, and suitably introduce animal such as earthworm and carry out the loose of matrix every two weeks.Increase the ventilating permeable of matrix, improve the redox potential of matrix, to promote arsenic in solution, to move, quicken the absorption accumulation of plant to arsenic, the sulfide of indissoluble can become unstable and be easy to oxidation under high redox potential situation simultaneously, metal is discharged, both helped arsenic by plant absorbing, the release and the follow-up leaching that also help gold are reclaimed.After plantation 9 months, the harvesting overground part, toothing 3～5cm is answered in harvesting.Measure by analysis, before and after the plantation Da Ye Herba Pteridis multifidae, the arsenic content in the Gold Ore is reduced to 2660mg/kg from 11035mg/kg, and the Da Ye Herba Pteridis multifidae reaches 75.9% to the extracting efficiency of gold mine arsenic.Harvested material send the waste guaveyard security landfill.
Embodiment 3
The arsenic content mean value of certain difficult-treating gold mine is 1.6%, and gold grade is 16.3g/t.Gold Ore tentatively is broken into particle diameter less than 1mm, 3mm and 6mm, and three kinds of particle diameters are with the ratio combination back tiling 30cm thickness gold mine hypothallus of 1:2:1, on this auriferous ore with plantation one strain Herba pteridis vittatae every about 20cm.Apply fertilizer every other month (identical with example 1), the irrigation of watering according to a conventional method, and introduce microbial preparation improves the amount of the root symbiosis fungi of Herba pteridis vittatae, helps the improvement of its rhizospheric environment and to the absorption accumulation of elements such as arsenic.And after 5 months, gather in its overground part first.Toothing 3～5cm, harvesting back the Herba pteridis vittatae of transplanting the first one-step growth that cultivates in advance among the gap on gold mine matrix, continued growth lixiviate arsenic removal.Grow and gathered in again in 4 months, constantly reduce by the arsenic content in 2 harvesting back Gold Ores.Measure by analysis, gold mine matrix arsenic content drops to 120mg/kg, and harvested material send the waste guaveyard security landfill, or carries out the recycling of arsenic.
Embodiment 4
The arsenic content mean value for the treatment of refractory As-containing gold ore is 1.8%, and gold grade is about 6.2g/t.Gold Ore tentatively is broken into particle diameter less than 0.5mm, 2mm and 4mm, and three kinds of particle diameter equal proportions combination back tiling 20cm thickness gold mine matrix, on this gold mine matrix with 70 strains/m
2Density carry out the interval plantation of Da Ye Herba Pteridis multifidae and Herba pteridis vittatae.And at the b diammonium disodium edta salt that in gold mine matrix, evenly sprays 0.1mmol/L after the germination every other month, 150ml/m
2, after plantation 8 months, the harvesting overground part.Measure by analysis, the arsenic in the gold mine matrix drops to 7860mg/kg by initial 18148mg/kg, and arsenic is removed efficient and reached 56.7%, again through growth in 5 months, and the harvesting overground part, the arsenic content in the gold mine matrix is reduced to 105mg/kg.
Embodiment 5
The arsenic content mean value for the treatment of refractory As-containing gold ore is 2.2%, and gold grade is about 9.3g/t.Gold Ore tentatively is broken into particle diameter less than＜2mm, is tiled into the gold mine matrix of 30cm thickness, on this gold mine matrix with 80 strains/m
2Density carry out the interval plantation of Da Ye Herba Pteridis multifidae and Herba pteridis vittatae.And apply weight percent after the germination in gold mine matrix is 10% diethylamine disuccinic acid dilute solution 100ml/m
2, after plantation 5 months, the harvesting overground part; Treat to continue to spray leaf surface trace fertilizer 100-200ml/m behind the eruption sprouting
2(its main component be ammonium nitrate or potassium primary phosphate convert water become 15% liquid fertilizer) strengthens photosynthesis, and can increase phytomass by prolonging leaf longevity; Afterwards every harvesting in 4 months once, toothing 3～5cm is answered in each harvesting, executes leaf surface trace fertilizer 100-200ml/m after gathering in the eruption sprouting at every turn
2, the arsenic after the 3rd harvesting in the gold mine matrix drops to 110mg/kg by 22032mg/kg.The overground part harvested material send the waste guaveyard security landfill.
Claims (6)
1, a kind of reduction plant of containing the high-Arsen gold ore smelting selection cost is carried the arsenic pretreatment process, and it is characterized in that: it is finished by following steps,
Gold Ore is broken into＜particle of 2mm, be tiled into the gold mine hypothallus of 20～40cm thickness, on this gold mine hypothallus according to plant a strain Da Ye Herba Pteridis multifidae or a Herba pteridis vittatae every 10～20cm kind, plant with direct transplanting or with the spore type of rearing, be aided with pouring, fertilising and management in the process, and over-ground part is carried out 2～4 times gather in, each harvesting back toothing 3-5cm, the last back gold mine hypothallus arsenic content that gathers in is reduced to below the 120mg/kg.
2, reduction according to claim 1 contains the plant of high-Arsen gold ore smelting selection cost and carries the arsenic pretreatment process, it is characterized in that: be 2% Gold Ore for the arsenic content mean value of gold mine, earlier it is broken into＜the gold mine matrix of 2mm, the thickness gold mine matrix of tiling 40cm, thereon to plant a strain Da Ye Herba Pteridis multifidae every the 10cm kind, the irrigation of watering according to a conventional method, execute leaf surface trace fertilizer, leaf surface trace fertilizer is that urea or potassium primary phosphate are converted water to become weight percentage be 15% liquid fertilizer, apply fertilizer first after it survives, applied fertilizer once in every month later on, to the foliage spray liquid fertilizer, rate of fertilizer application is 100-200ml/m
2Gold mine matrix, the irrigation of watering according to a conventional method after 5 months, is gathered in its over-ground part first, and toothing 3～5cm, and later every growth harvesting in 4 months is once reduced to 90mg/kg by the arsenic content of 3 harvesting back gold mine matrix.
3, the reduction according to claim 1 plant that contains the high-Arsen gold ore smelting selection cost is carried the arsenic pretreatment process, it is characterized in that: the arsenic gold mine on average contains arsenic 1.1%, Gold Ore is broken into＜1mm, the gold mine hypothallus of tiling 20～30cm thickness, spacing with 15cm on this hypothallus is planted the Da Ye Herba Pteridis multifidae, between planting season, carry out the loosening of a matrix and turn over, and suitably introduce earthworm and carry out the loose of matrix every two weeks.
4, reduction according to claim 1 contains the plant of high-Arsen gold ore smelting selection cost and carries the arsenic pretreatment process, it is characterized in that: the arsenic content mean value of gold mine is 1.6%, the gold mine hypothallus of gold mine tiling 30cm thickness, thereon to plant a strain Herba pteridis vittatae every the 20cm kind, 15% the liquid fertilizer converted of application of phosphoric acid potassium dihydrogen every other month, the irrigation of watering according to a conventional method, and introducing microbial preparation, improve the amount of the root symbiosis fungi of Herba pteridis vittatae, help the improvement of its rhizospheric environment and to the absorption of arsenic element accumulation, and after 5 months, gather in its overground part first, toothing 3～5cm, the Herba pteridis vittatae of the first one-step growth that cultivates is in advance being transplanted on gold mine matrix in the harvesting back among the gap, continued growth lixiviate arsenic removal, the harvesting again in 4 months of growing drops to 120mg/kg by the arsenic content in 2 harvesting back Gold Ores.
5, the reduction according to claim 1 plant that contains the high-Arsen gold ore smelting selection cost is carried the arsenic pretreatment process, and it is characterized in that: the arsenic content mean value of gold mine is 1.8%, gold mine tiling 20cm thickness gold mine matrix, on this gold mine matrix with 70 strains/m
2Density carry out the interval plantation of Da Ye Herba Pteridis multifidae or Herba pteridis vittatae, and in gold mine matrix, evenly spraying the b diammonium disodium edta salt 150ml/m of 0.1mmol/L after the germination every other month
2, after plantation 8 months, the harvesting overground part, again through growth in 5 months, the harvesting overground part, the arsenic content in the gold mine matrix is reduced to 105mg/kg.
6, the reduction according to claim 1 plant that contains the high-Arsen gold ore smelting selection cost is carried the arsenic pretreatment process, it is characterized in that: the arsenic content mean value of gold mine is 2.2%, Gold Ore is broken into particle diameter less than＜2mm, be tiled into the gold mine matrix of 30cm thickness, on this gold mine matrix with 80 strains/m
2Density carry out the interval plantation of Da Ye Herba Pteridis multifidae or Herba pteridis vittatae, and be 10% diethylamine disuccinic acid dilute solution 100ml/m in gold mine matrix, applying weight percent after the germination
2, after plantation 5 months, the harvesting over-ground part is treated to continue to spray leaf surface trace fertilizer 100-200ml/m behind the eruption sprouting
2, leaf surface trace fertilizer is that ammonium nitrate is converted water and become 15% liquid fertilizer, afterwards every harvesting in 4 months once, toothing 3～5cm is answered in each harvesting, executes leaf surface trace fertilizer 100-200ml/m after gathering in the eruption sprouting at every turn
2, the arsenic after the 3rd harvesting in the gold mine matrix drops to 110mg/kg by 22032mg/kg.
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| CN101831558B (en) * | 2010-05-25 | 2012-01-11 | 芒市海华开发有限公司 | Osmotic treatment and stacking method of oxidized clay type gold ores |
| CN102806227A (en) * | 2011-06-01 | 2012-12-05 | 李银亭 | Method of restoring soil polluted by heavy metal |
| CN103509945A (en) * | 2012-06-15 | 2014-01-15 | 西南科技大学 | Method for recovering arsenic from arsenic-enriched plant |
| PE20161083A1 (en) | 2014-01-31 | 2016-11-19 | Goldcorp Inc | PROCESS FOR THE SEPARATION OF AT LEAST ONE METAL SULFIDE FROM A MIXED SULFIDE ORE OR CONCENTRATE |
| CN105945042A (en) * | 2016-06-02 | 2016-09-21 | 龚松贵 | Method for removing soil arsenic pollution by interplanting pteris vittata |
| CN109127720B (en) * | 2018-05-31 | 2020-07-21 | 昆明理工大学 | Method for improving heavy metal hyper-enrichment phytoremediation efficiency by using spraying agent |
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