CN115417703A - Method for performing non-ferrous metal tailing soil formation by using volcanic ash as main raw material - Google Patents
Method for performing non-ferrous metal tailing soil formation by using volcanic ash as main raw material Download PDFInfo
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- CN115417703A CN115417703A CN202211104610.7A CN202211104610A CN115417703A CN 115417703 A CN115417703 A CN 115417703A CN 202211104610 A CN202211104610 A CN 202211104610A CN 115417703 A CN115417703 A CN 115417703A
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- volcanic ash
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 title claims abstract description 36
- 239000002994 raw material Substances 0.000 title claims abstract description 25
- 238000004181 pedogenesis Methods 0.000 title claims abstract description 12
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 239000002689 soil Substances 0.000 claims abstract description 40
- 210000003608 fece Anatomy 0.000 claims abstract description 29
- 239000010871 livestock manure Substances 0.000 claims abstract description 23
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 15
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 15
- 239000004571 lime Substances 0.000 claims abstract description 15
- 239000002910 solid waste Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 241001464837 Viridiplantae Species 0.000 claims abstract description 12
- 241000894006 Bacteria Species 0.000 claims abstract description 11
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000004913 activation Effects 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 6
- 238000012423 maintenance Methods 0.000 claims abstract description 4
- 238000000855 fermentation Methods 0.000 claims description 11
- 230000004151 fermentation Effects 0.000 claims description 11
- 239000002068 microbial inoculum Substances 0.000 claims description 9
- 239000002361 compost Substances 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 241000287828 Gallus gallus Species 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 6
- 235000009566 rice Nutrition 0.000 claims description 6
- 239000010902 straw Substances 0.000 claims description 6
- 238000009264 composting Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000035558 fertility Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 230000000813 microbial effect Effects 0.000 abstract description 3
- 235000015097 nutrients Nutrition 0.000 abstract description 3
- 239000011593 sulfur Substances 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract 2
- 238000005904 alkaline hydrolysis reaction Methods 0.000 abstract 1
- 244000005700 microbiome Species 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 241000233866 Fungi Species 0.000 description 5
- 241000209094 Oryza Species 0.000 description 5
- 210000000481 breast Anatomy 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 239000002154 agricultural waste Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000004083 survival effect Effects 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002894 chemical waste Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000003895 organic fertilizer Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- -1 aluminate ions Chemical class 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002500 ions Chemical group 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention discloses a method for performing non-ferrous metal tailing soil formation by using volcanic ash as a main raw material, which comprises the steps of adding volcanic ash soil into non-ferrous metal tailings according to a certain proportion, applying lime powder to improve the activity of the volcanic ash, adding agricultural solid wastes, farmyard manure, EM (effective microorganism) microbial agents, silicate bacteria and water-retaining agents to the volcanic ash after the activation reaction of the volcanic ash is finished, fermenting, finally planting green plants and performing artificial maintenance. The activated volcanic ash can adsorb sulfur-containing compounds and heavy metals in tailings, simultaneously keeps soil in a loose and ventilated state, and increases the air permeability; the fertility indexes of organic matters, total nitrogen, alkaline hydrolysis nitrogen and the like in the fermented tailings are improved, and the tailings have the advantages of promoting the release of inorganic nutrient elements, preserving water and preserving soil moisture. The method is simple to operate, reduces the damage of the nonferrous metal tailings to the surrounding environment, solves the problem of agricultural solid waste stockpiling, and has great practical significance for the tailing soil conversion and the agricultural solid waste resource utilization.
Description
Technical Field
The invention belongs to the technical field of ecological restoration, and particularly relates to a method for performing non-ferrous metal tailing soil formation by using volcanic ash as a main raw material.
Background
China is a large country of mining industry, mineral resources are continuously developed and utilized along with the rapid development of economy, the scale and the number of various metal mines are increased day by day, and the tailing amount of a concentrating mill is also increased rapidly. At present, the stockpiling amount of the nonferrous metal tailings in China exceeds 150 hundred million t, but the comprehensive utilization level of the metal tailings is lower, the comprehensive utilization rate of tailings waste is only 60 percent, and the tailings become the solid waste with the largest output and the largest stockpiling amount in China. The large amount of stockpiling of the tailings not only can cause serious damage to the surrounding ecological environment, influence the ecological sustainable development and destroy the life and property safety of the masses of people, but also heavy metals in the nonferrous metal tailings can flow down into the infiltrated underground water, so that the damage caused is great.
Soil is a system composed of solid, liquid and gaseous substances. Its basic components are minerals, organic matter, moisture and air. These constituents are bound to each other, interdependent and interdependent in the soil. In the last half century, due to rapid expansion of global population and large-scale expansion of cities, the cultivated land area is reduced rapidly, the land replanting index is increased rapidly, and the soil tilth and the self-nutrition capacity are reduced continuously. Therefore, in combination with the current situation that a great deal of nonferrous metal tailings are accumulated in China and resource utilization is urgently needed, the development of a method for utilizing the nonferrous metal tailings in soil is necessary.
Volcanic ash refers to crushed stone and mineral particles with a diameter of less than 2 mm, which are ejected from volcanoes, and in explosive volcanic motion, solid stone and molten slurry are decomposed into fine particles to form volcanic ash, a large amount of volcanic ash is accumulated near the crater, and the accumulation is mixed with surrounding soil for a long time. The volcanic ash has the characteristics of coarse texture, high porosity and high fertility, can keep soil in a loose and ventilated state, increases the water retention and ventilation capacity of the soil, and provides a nutritional environment for planting plants. Therefore, the metal tailings are subjected to soil preparation by taking the volcanic ash as a main raw material, so that the quality and the utilization value of the improved soil are improved.
At present, no universally accepted ideal method exists for the problem of the non-ferrous metal tailing soil formation by using volcanic ash as a main raw material. For example, a method for the soil preparation of iron tailings (CN 201811102129.8) proposes to arrange a drainage ditch on a leveled tailing ground, add a water retention agent, a modifier and a microbial agent into the soil to soil the iron tailings, and then plant green plants on the soil. However, after the water retention agent and the modifying agent are added, the microbial agent is not applied to increase the nutrients of the soil, and the effect of planting green plants after the soil is changed is not good. A saline-alkali soil improvement method for garden planting (CN 202111325186.4) provides that planting soil is prepared by taking turfy soil, organic fertilizer, volcanic ash and desulfurized gypsum as main raw materials, and the planting soil is backfilled to improve the alkaline soil. However, the method does not directly improve the soil, and does not achieve the purposes of fully utilizing the soil resources and sustainably utilizing the resources.
Disclosure of Invention
The invention aims to provide a method for converting nonferrous metal tailings into soil by using volcanic ash as a main raw material.
The object of the invention is achieved by the following steps:
s1, firstly, leveling a tailing field;
s2, digging a ditch on the leveled tailing ground, and dividing the tailing ground into a plurality of rectangular areas;
s3, uniformly applying volcanic ash and lime on each rectangular area obtained in the step (2) in proportion and ploughing;
s4, after the volcanic ash and lime fully react in the step (3), adding agricultural solid waste, farmyard manure, EM microbial inoculum, silicate bacteria and water-retaining agent into the tailing land, and performing composting fermentation;
and S5, finally planting green plants on the fermented tailings land, and carrying out artificial maintenance.
Compared with the prior art, the invention has the following technical effects:
1. the method adopts the activated volcanic ash as a main raw material to carry out the soil improvement on the metal tailings, and has the characteristics of large internal specific surface area, small specific gravity, low hydration heat and the like, so that the soil improvement effect of the tailings can be greatly improved;
2. the method of the invention directly operates and arranges on the surface of the metal tailing pond, and the overall operation cost is lower;
3. the main raw material (volcanic ash) used in the method has wide sources, low cost, large quantity, sufficient supply and easy acquisition;
4. the method of the invention uses agricultural solid waste and farmyard manure for composting fermentation, which not only solves the problem of composting of agricultural solid waste, but also improves the fertility of soil.
Detailed Description
The present invention is further illustrated but not limited in any way by the following description, and any alterations or substitutions based on the teachings of the present invention are intended to fall within the scope of the present invention.
The method for performing the non-ferrous metal tailing soil formation by using the volcanic ash as the main raw material comprises the following steps:
s1, firstly, leveling a tailing ground, wherein the ground cannot have an area with large concave-convex amplitude;
s2, digging a ditch on the leveled tailing land in the step (1), and dividing the tailing land into smaller rectangular areas;
s3, uniformly applying volcanic ash and lime on each rectangular area in the step (2) in proportion and ploughing;
s4, adding a certain amount of agricultural solid waste, farmyard manure, EM microbial inoculum, silicate bacteria and a water-retaining agent into the tailing ground after the volcanic ash and lime fully react in the step (3), and performing composting fermentation;
s5, planting green plants on the tailing land after fermentation in the step (4);
s6, carrying out artificial maintenance on the green plants planted in the step (5).
Further, the leveling area in the step (1) is an area of the metal tailing pond except the top.
Further, the tailings land in the step (2) is divided into rectangular areas with the length of 2.5-2.8 meters and the width of 1.5-1.8 meters.
Further, digging ditches by using the HSWG-170 type mini-tiller in the step (2), wherein each ditch is 0.5-0.6 m deep.
Further, volcanic ash is applied to each rectangular area of the tailing land in the step (3) to uniformly cover the tailing land, and the using amount of the volcanic ash is 200-220 kg/100m 2 。
Further, the volcanic ash used in the step (3) is obtained from Tengchong county of Baoshan city, yunnan province, and the volcanic ash contains the same components as common volcanic ash.
Furthermore, lime powder is added after the volcanic ash is added in the step (3), and the using amount of the lime powder is 20-50% of the weight of the volcanic ash in terms of weight.
Further, the hydrated lime is used in the step (3), and ploughing is carried out after the application is finished, so that the volcanic ash and the lime are fully contacted for carrying out an activation reaction.
Further, lime powder is added after the volcanic ash is added in the step (3), and a certain amount of active SiO exists in the mixture of the volcanic ash 2 、Al 2 O 3 Etc. active components, can absorb Ca (OH) 2 ，Ca(OH) 2 By destroying and releasing SiO 2 、Al 2 O 3 And alkali-etched crystal structure of SiO 2 And Al 2 O 3 By chemical combination with calcium oxide, i.e. in alkaline medium, the vitreous undergoes a hydrolysis process which brings silicate and aluminate ions into solution, with Ca 2+ And Mg 2+ The ions form very low solubility product phases-calcium silicate hydrate and calcium aluminate hydrate.
Furthermore, the volcanic ash activated in the step (3) has large internal specific surface area, small specific gravity, low hydration heat and better sulfate corrosion resistance, can adsorb sulfur-containing compounds and heavy metals in tailings, improves the defect of tailing compactness and the environment of a tailing pond, is beneficial to improving fertility, releases the alkali content of the total alkali content of the volcanic ash in the reaction process, and is beneficial to inhibiting the oxidation of metal tailings and the release of acid elements such as sulfur elements.
Further, the agricultural solid waste in the step (4) is formed by mixing waste fungus sticks, rice bran and straws according to the volume ratio of 0.8 2 。
Further, the farmyard manure in the step (4) is prepared by mixing cow dung and chicken manure according to the volume ratio of 1.0 2 。
Further, the dosage of the EM microbial inoculum and the silicate bacteria in the step (4) is 0.5-0.8 kg/100m 2 And 6.5-8.5 kg/100m 2 。
Further, the water-retaining agent in the step (4) is polyacrylamide, and the dosage of the water-retaining agent is 1.2-1.8 kg/100m 2 。
Further, the agricultural solid waste and farmyard manure compost fermentation in the step (4) needs 45-60 days.
Further, the compost fermentation in the step (4) can increase the organic fertilizer content of the metal tailings subjected to the soil treatment, promote the release of inorganic nutrient elements and obviously improve the fertility of the metal tailings; meanwhile, the method has the functions of preserving water and soil moisture and neutralizing acid elements in the metal tailings.
Further, the planting green plants in the step (5) are shrubs.
Further, the planted shrubs in the step (5) are dug into a round pit with the diameter of 0.30-0.50 m and the depth of the pit of 0.50 m according to the density of 1 pit per seedling, and 4 shrubs are planted in each rectangular tailing area.
And (3) further, setting a watering time interval and a watering amount according to the climate temperature condition and the water evaporation condition during the shrub irrigation in the step (6).
The invention is further illustrated by example 1~4.
Example 1
A method for carrying out colored tailing soil formation by using volcanic ash as a main raw material comprises the following steps:
s1, leveling the area except the top of an iron tailing pond, wherein the leveling area cannot have an area with large concave-convex amplitude;
s2, digging a ditch on the leveled area in the step (1) by using an HSWG-170 type small cultivator, wherein the depth of the ditch is 0.5 m, and the tailing area is divided into rectangular areas with the length of 2.5 m and the width of 1.5 m;
s3, dividing each rectangular tailing area in the step (2) according to the proportion of 200kg/100m 2 The volcanic ash is uniformly added in the amount of the volcanic ash; then apply hydrated lime evenly according to 35% of the volcanic ash dosage volume and turn over to make the two contact and react fully.
S4, then after the volcanic ash activation reaction in the step (3) is finished, 160kg/100m of volcanic ash is added 2 Uniformly adding agricultural waste which is formed by mixing waste fungus sticks, rice bran and straws according to a volume ratio of 0.8 2 Uniformly adding farmyard manure which is formed by mixing cow dung and chicken manure according to the volume ratio of 1.0; then uniformly adding EM microbial inoculum and silicate bacteria, wherein the dosage is 0.5kg/100m 2 And 6.5kg/100m 2 。
S5, planting shrubs on the farm land after the farm solid waste and the farm manure are subjected to compost fermentation for 45 days in the step (4), wherein the dug pits are circular with the diameter of 0.30 meter and the depth of 0.50 meter according to the density of 1 pit for each nursery stock, and 4 plants are planted in each rectangular tailing area.
S6, after the green plants are planted in the step (5), a watering time interval and a watering amount are set according to the climate temperature condition and the water evaporation condition when the woody shrubs are irrigated.
Example 2
A method for carrying out colored tailing soil formation by using volcanic ash as a main raw material comprises the following steps:
s1, leveling the copper tailing pond except for the top area, wherein the leveling area cannot have an area with large concave-convex amplitude;
s2, digging a ditch on the leveled area in the step (1) by using an HSWG-170 type small cultivator, wherein the depth of the ditch is 0.5 m, and the tailing area is divided into rectangular areas with the length of 2.8 m and the width of 1.8 m;
s3, dividing in step (2)Each rectangular tailing area is 220kg/100m 2 The volcanic ash is uniformly added in the amount of the volcanic ash; then apply hydrated lime evenly according to 35% of the volcanic ash dosage volume and turn over to make the two contact and react fully.
S4, then after the volcanic ash activation reaction in the step (3) is finished, adding 180kg/100m of volcanic ash 2 Uniformly adding agricultural waste which is formed by mixing waste fungus sticks, rice bran and straws according to the volume ratio of 0.8 2 Uniformly adding farmyard manure which is formed by mixing cow dung and chicken manure according to the volume ratio of 1.0; then uniformly adding EM microbial inoculum and silicate bacteria, wherein the dosage is 0.8kg/100m 2 And 8.5kg/100m 2 。
S5, planting shrubs on the farm chemical waste and farmyard manure compost after 45 days of fermentation in the step (4), planting 4 shrubs in each rectangular tailing area, wherein the dugs are circular with the diameter of 0.50 meter and the depth of 0.50 meter according to the density of 1 pit of each nursery stock.
S6, after the green plants are planted in the step (5), a watering time interval and a watering amount are set according to the climate temperature condition and the water evaporation condition when the woody shrubs are irrigated.
Example 3
A method for carrying out colored tailing soil formation by using volcanic ash as a main raw material comprises the following steps:
s1, leveling the areas except the top of a lead tailing pond, wherein the leveling areas cannot have areas with large concave-convex amplitude;
s2, digging a ditch on the leveled area in the step (1) by using an HSWG-170 type small cultivator, wherein the depth of the ditch is 0.5 m, and the tailing area is divided into rectangular areas with the length of 2.6 m and the width of 1.6 m;
s3, dividing each rectangular tailing area in the step (2) according to the weight of 210kg/100m 2 The volcanic ash is uniformly added in the amount of the volcanic ash; then apply hydrated lime evenly according to 35% of the volcanic ash dosage volume and turn over to make the two contact and react fully.
S4, after the volcanic ash activation reaction in the step (3) is finished, 170kg/100m is added 2 Uniformly adding agricultural waste which is formed by mixing waste fungus sticks, rice bran and straws according to the volume ratio of 0.8 2 Uniformly adding farmyard manure which is formed by mixing cow dung and chicken manure according to the volume ratio of 1.0; then uniformly adding EM microbial inoculum and silicate bacteria, wherein the dosage is 0.6kg/100m 2 And 7kg/100m 2 。
S5, planting shrubs on the farm chemical waste and farmyard manure compost after 45 days of fermentation in the step (4), planting 4 shrubs in each rectangular tailing area, wherein the dugs are circular with the diameter of 0.40 meter and the depth of 0.50 meter according to the density of 1 pit of each nursery stock.
S6, after the green plants are planted in the step (5), a watering time interval and a watering amount are set according to the climate temperature condition and the water evaporation condition when the woody shrubs are irrigated.
Example 4
A method for carrying out colored tailing soil formation by using volcanic ash as a main raw material comprises the following steps:
s1, leveling the zinc tailing pond except for the top region, wherein the leveling region cannot have a region with large concave-convex amplitude;
s2, digging a ditch on the leveled area in the step (1) by using an HSWG-170 type small cultivator, wherein the depth of the ditch is 0.5 meter, and the tailing field is divided into rectangular areas with the length of 2.7 meters and the width of 1.7 meters;
s3, dividing each rectangular tailing area in the step (2) according to the proportion of 200kg/100m 2 The volcanic ash is uniformly added in the amount of the volcanic ash; then the hydrated lime is evenly applied by 35% of the volume of the used amount of the volcanic ash and plowed, and the two are fully contacted and reacted.
S4, then after the volcanic ash activation reaction in the step (3) is finished, adding 180kg/100m of volcanic ash 2 Uniformly adding agricultural waste which is formed by mixing waste fungus sticks, rice bran and straws according to the volume ratio of 0.8 2 Uniformly adding farmyard manure which is formed by mixing cow dung and chicken manure according to the volume ratio of 1.0; then uniformly adding EM microbial inoculum and silicate bacteria, wherein the dosage is 0.7kg/100m 2 And 7.5kg/100m 2 。
S5, planting shrubs on the farm land after the farm solid waste and the farm manure are subjected to compost fermentation for 45 days in the step (4), wherein the dug pits are circular with the diameter of 0.50 meter and the depth of 0.50 meter according to the density of 1 pit for each nursery stock, and 4 plants are planted in each rectangular tailing area.
S6, after the green plants are planted in the step (5), a watering time interval and a watering amount are set according to the climate temperature condition and the water evaporation condition when the woody shrubs are irrigated.
Experimental method the experimental group was constructed according to the method of Experimental example 1, and the control group was constructed according to the methods of examples 1-4; the survival rate of shrubs was examined and the results are shown in table 1.
TABLE 1 survival rate of shrubs in modified tailings of different types
| Type of tailings | Iron tailings | Copper tailings | Lead tailings | Zinc tailings |
| Survival rate | 88.5-91% | 89-92% | 88.5-90.5% | 89.5-92% |
In experimental examples 1-4, the average survival rate of shrubs reaches 90%, and different types of nonferrous metal tailings have better planting capability after being improved by the method. And then, more types of metal tailings are selected to carry out feasibility experiments of the method, and the applicability of the method in different metal tailings is further researched.
Claims (10)
1. A method for performing non-ferrous metal tailing soil formation by using volcanic ash as a main raw material is characterized by comprising the following steps:
s1, firstly, leveling a tailing field;
s2, digging a ditch on the leveled tailing ground, and dividing the tailing ground into a plurality of rectangular areas;
s3, uniformly applying volcanic ash and lime on each rectangular area obtained in the step (2) in proportion and ploughing;
s4, after the volcanic ash and lime fully react in the step (3), adding agricultural solid waste, farmyard manure, EM microbial inoculum, silicate bacteria and water-retaining agent into the tailing land, and performing composting fermentation;
and S5, finally planting green plants on the fermented tailings land, and carrying out artificial maintenance.
2. The method for the soil treatment of the nonferrous metal tailings by using the volcanic ash as the main raw material according to claim 1, wherein the depth of the ditch in the step (2) is 0.5-0.6 m, and the length of the rectangular area is 2.5-2.8 m and the width of the rectangular area is 1.5-1.8 m.
3. The method for the soil preparation of nonferrous metal tailings using volcanic ash as a main raw material according to claim 1, wherein the volcanic ash in the step (3) is uniformly coated on the tailings land in an amount of 200-220 kg/100m 2 。
4. The method for performing the soil formation of the nonferrous metal tailings by using the volcanic ash as the main raw material according to claim 1, wherein the lime powder is added after the volcanic ash is applied in the step (3), the amount of the lime powder is 20-50% of the weight of the volcanic ash, the lime is hydrated lime, and the volcanic ash is turned over after the application is completed, so that the volcanic ash and the lime are fully contacted for an activation reaction.
5. The method for performing the soil treatment on the nonferrous metal tailings by using the volcanic ash as the main raw material according to claim 1, wherein the agricultural solid wastes in the step (4) are prepared by mixing waste bacteria rods, rice bran and straws according to a volume ratio of 0.8 2 。
6. The method for performing the soil treatment on the nonferrous metal tailings by using the volcanic ash as the main raw material according to claim 1, wherein the farmyard manure in the step (4) is prepared by mixing cow dung and chicken manure according to a volume ratio of 1.0 to 1.0, and the using amount of the farmyard manure is 80-110 kg/100m 2 。
7. The method for performing the soil treatment on the nonferrous metal tailings by using the volcanic ash as the main raw material according to claim 1, wherein the water-retaining agent in the step (4) is polyacrylamide, and the dosage of the polyacrylamide is 1.2-1.8 kg/100m 2 。
8. The method for performing the soil treatment on the nonferrous metal tailings by using the volcanic ash as the main raw material according to claim 1, wherein the EM microbial inoculum and the silicate bacteria in the step (4) are respectively used in an amount of 0.5-0.8 kg/100m 2 And 6.5-8.5 kg/100m 2 。
9. The method for the soil preparation of the nonferrous metal tailings by using the volcanic ash as the main raw material according to claim 1, wherein the compost in the step (4) is fermented for 45-60 days.
10. The method for performing the soil treatment on the nonferrous metal tailings by using the volcanic ash as the main raw material according to claim 1, wherein the planting green plants in the step (5) are circular with the diameter of 0.30-0.50 m and the depth of the pit of 0.50 m according to the density of 1 pit in each seedling, and 4 shrubs are planted in each rectangular tailing area.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110058472A (en) * | 2009-11-26 | 2011-06-01 | 한국지질자원연구원 | Stabilization method of mine tailings for the formation of hardpan layer on top of tailings landfill |
| CN109168391A (en) * | 2018-09-20 | 2019-01-11 | 鞍钢集团矿业有限公司 | A kind of method of iron tailings soil |
| CN109731903A (en) * | 2019-01-23 | 2019-05-10 | 青岛农业大学 | A kind of ecological restoring method of layered coverage gold mine tailings |
| CN114793526A (en) * | 2022-04-25 | 2022-07-29 | 昆明理工大学 | Method for artificially accelerating reconstruction of mining industry waste site conditions |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110058472A (en) * | 2009-11-26 | 2011-06-01 | 한국지질자원연구원 | Stabilization method of mine tailings for the formation of hardpan layer on top of tailings landfill |
| CN109168391A (en) * | 2018-09-20 | 2019-01-11 | 鞍钢集团矿业有限公司 | A kind of method of iron tailings soil |
| CN109731903A (en) * | 2019-01-23 | 2019-05-10 | 青岛农业大学 | A kind of ecological restoring method of layered coverage gold mine tailings |
| CN114793526A (en) * | 2022-04-25 | 2022-07-29 | 昆明理工大学 | Method for artificially accelerating reconstruction of mining industry waste site conditions |
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| 陈昆柏等: "《危险废物处理与处置》", vol. 1, 河南科学技术出版社, pages: 142 - 143 * |
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