CN111018622B - Rapid improvement material and method for gangue yard medium habitat - Google Patents

Abstract

The invention discloses a material for rapidly improving the medium habitat of gangue storage yard, which includes passivation material and vegetation improvement material; the vegetation improvement material includes: 85%-90% of mixed anaerobic fermentation product, 9%-10% of phosphate rock powder % and 1% to 5% of sulfate-reducing bacteria; the plant improvement material is prepared by the following method: A. Mixed anaerobic fermentation product preparation A1: mixture preparation: 35% to 55% of soybean meal and 45%～65% of the mulberry litter is mixed; A2: inoculate fermented soya bean microorganism in the mixture of A1 step, fermented fermented soya bean microbial addition is 0.2～1.5% of the total weight of the mixture, ferment under anaerobic condition to obtain mixed anaerobic fermentation B. Add phosphate rock powder and sulfate-reducing bacteria to the mixed anaerobic fermentation product in step A, and mix well to obtain plant growth improvement materials. The invention can improve the physical properties of the gangue storage yard, increase the nutrient content of nitrogen, phosphorus and available potassium in the gangue storage yard, increase the microbial biomass in the gangue storage yard, and thus promote the ecological reconstruction of the gangue storage yard.

Description

A rapid improvement material and method for the medium habitat of waste rock stockpile

technical field

The invention relates to a rapid improvement material and a method thereof, in particular to a rapid improvement material and a method for the medium habitat of gangue storage yards.

Background technique

All kinds of gangue rich in sulfur and iron are easy to oxidize and produce acid after being stacked in the open air, which seriously pollutes the surrounding environment and threatens human health. Among them, coal gangue has a larger quantity, a wider distribution, and the most serious pollution. Coal gangue is solid waste produced during coal mining and washing. At present, the accumulated amount in China is nearly 5 billion tons. There are more than 1,600 large-scale coal gangue hills, occupying about 15,000 hm ² of land. Under the combined effects of air oxidation, rainwater leaching and acid-producing microorganisms in the natural environment, it is easily weathered to form acid mine drainage with low pH value, high iron, manganese and sulfate content, and contains a variety of harmful heavy metal ions. AMD), seriously pollute the surrounding water body, soil and other environments, causing the degradation of terrestrial and aquatic ecosystems. The weathering process of sulfur-containing tailings of coal gangue, pollution release and possible environmental and ecological risks, pollution prevention and ecological restoration have attracted widespread attention.

Phytoremediation is the main content and goal of ecological restoration in mining areas. By using different plants to absorb, enrich, fix, and degrade pollutants in soil and water (including groundwater), reduce or avoid soil erosion, and increase vegetation coverage through plant growth , so as to achieve ecological restoration or ecological improvement. However, due to the strong acidity, strong oxidizing properties, poor physical structure, poor water and water retention capacity, high concentration of toxic and harmful metals, high sulfate and low nutrients in the coal gangue yard, plants grow in the gangue yard. extremely difficult. The patent (application number "201911078464.3") uses modified limestone and modified silica-calcium peroxide passivation materials to effectively control the release of pollutants in high-sulfur and high-iron gangue, and significantly inhibit the growth of sulfur-oxidizing bacteria Active, quickly reduce the acid production capacity of waste rock, comprehensively realize the control of pollution release of waste rock storage yard, so as to effectively protect the ecological environment around the gangue storage yard. The nutrient content of the materials used in the above-mentioned patents is low. Although the physical and chemical properties of the gangue yard have been improved, the progress of ecological restoration of the gangue yard has been hindered due to poor nutrient status. Therefore, it is particularly important to improve the matrix of coal gangue before phytoremediation of gangue yards.

Contents of the invention

The object of the present invention is to provide a material and a method for rapidly improving the medium habitat of gangue storage yards. On the basis of the patent (the application number is "201911078464.3"), the present invention adds vegetation improvement materials, which can improve the physical properties of the gangue yard, increase the nutrient content of the gangue yard, such as nitrogen, phosphorus, and available potassium, and increase the The microbial biomass in coal gangue can promote the ecological reconstruction of gangue yards, and at the same time, it has little impact on the effect of in-situ control of the release of high-sulfur and high-iron pollutants provided by the patent (application number "201911078464.3"). Moreover, the material used in the invention is easy to obtain, easy to process, low in price, simple in construction technology, remarkable in effect and strong in operability.

The technical solution of the present invention: a rapid improvement material for the medium habitat of gangue storage yard, including passivation material and vegetation improvement material; the vegetation improvement material contains: 85% to 90% of mixed anaerobic fermentation product, phosphorus 9% to 10% of mineral powder and 1% to 5% of sulfate-reducing bacteria; the plant improvement material is prepared by the following method:

A. Preparation of mixed anaerobic fermentation

A1: mixture preparation: mix 35%～55% soybean meal and 45%～65% mulberry litter by weight percentage;

A2: Inoculate Douchi microorganisms into the mixture of step A1, the amount of Douchi microorganisms added is 0.2 to 1.5% of the total weight of the mixture, and ferment under anaerobic conditions to obtain a mixed anaerobic fermentation product;

B. Add phosphate rock powder and sulfate-reducing bacteria to the mixed anaerobic fermentation product in step A, and mix well to obtain a plant growth improvement material.

In the above-mentioned materials for rapid improvement of the medium habitat of gangue yards, the fermented soya bean microorganisms contain 45% to 75% of bacteria and 25% to 55% of fungi by weight percentage.

In the above-mentioned materials for rapid improvement of the medium habitat of gangue storage yard, the bacteria include 50% to 60% of cyanobacteria, 30% to 40% of Firmicutes, 1% to 10% of actinomycetes and proteobacteria by weight percentage. %; the said fungus contains by weight percentage: 90%-100% of Zygomycota Rhizobacillus and 0-10% of Ascomycota.

In the above-mentioned materials for rapid improvement of the medium habitat of gangue storage yards, in the step A2, fermented soy bean microorganisms are inoculated into the mixture in the step A1, and the water content is adjusted to 55% to 65%, and fermented under anaerobic conditions at 25 to 35°C The required mixed anaerobic fermentation product can be obtained in 10-15 days.

In the aforementioned quick improvement material of waste rock stockpile medium habitat, the passivation material includes passivation material A and passivation material B, and the passivation material is obtained by the following method:

Passivation material A: After the limestone is crushed, NaOH is added to modify the limestone so that its pH reaches 9-11;

Passivation material B: Add NaOH to the pulverized silica and mix it evenly for modification, and add an appropriate amount of water to make the water content in the silica-NaOH system 40%-50%, and stabilize the pH to 10-11. The stabilized modified silica is dried until the moisture content is 15% to 20%, and then CaO _{2 is added to the dried modified silica. The amount of CaO 2 added} is 5% to 5% of the mass of the dried modified silica. 12%.

In the above-mentioned materials for rapidly improving the medium habitat of gangue yards, during the preparation process of the passivation materials, limestone and silica are respectively crushed to below 50 mesh.

In the above-mentioned materials for rapidly improving the medium habitat of waste rock dumps, the content of CaCO ₃ in the limestone is 82% to 90%.

A method for rapidly improving the medium habitat of gangue storage yards. The specific improvement method includes the following steps:

(1) Loosen the gangue, add passivation material A and mix well, and react until the pH is stable to 5-6;

(2) Add passivation material B to the gangue after the reaction of passivation material A, and mix evenly;

(3) Add the plant growth improvement material to the passivated gangue and mix evenly.

In the aforementioned rapid improvement method for the medium habitat of the waste rock stockpile, the addition amount of the passivation material B is 3% to 12% of the dry weight of the waste rock.

In the aforementioned rapid improvement method for the medium habitat of the waste rock stockpile, the added amount of the vegetation improvement material is 3% to 12% of the dry weight of the waste rock.

Beneficial effects of the present invention: Compared with the prior art, the present invention provides a method for rapidly improving the medium habitat of strong-acid, high-sulfur, high-iron gangue yards and its improved materials. The material used in the method is a mixture of soybean meal and mulberry litter Anaerobic fermentation product, phosphate rock powder and sulfate-reducing bacteria group; among the above components, the main components of soybean meal are protein, lysine, tryptophan, methionine, and are rich in nitrogen, phosphorus, potassium and organic matter. Among them, the addition of nitrogen, phosphorus and potassium can directly increase soil nutrients, and amino acids can be directly absorbed and utilized by crops, which is conducive to the absorption, transformation and accumulation of nutrients, while enhancing soil enzyme activity and accelerating nutrient conversion. The mulberry litter contains soluble nutrients such as sugar and protein, which promote the growth and reproduction of microorganisms. After anaerobic fermentation, soybean meal and mulberry litter can fix nitrogen and release phosphorus to promote the absorption of phosphorus by microorganisms. Phosphorus will be lost to a certain extent, but the addition of phosphate rock powder can make up for this deficiency. Douchi is rich in bacterial composition and large in number of fungi, and its addition can significantly increase the number and diversity of microorganisms in gangue yards, and the addition of sulfate-reducing bacteria can release alkalinity, increase the pH value of gangue, and reduce the amount of microorganisms in gangue. The SO ₄ ^2- is converted into S ^2- , and S ^2- forms stable sulfide precipitation with metal ions, thereby reducing the release of pollutants in gangue. The reasonable combination of the above-mentioned components can give full play to various functions, and finally effectively promote the improvement of the habitat of gangue storage yards, and can cooperate with passivation materials to control the release of pollutants in coal gangue.

Description of drawings

Accompanying drawing 1 is the graph of high sulfur and high iron gangue (coal gangue) leachate pH

Accompanying drawing 2 is the curve diagram of high sulfur and high iron gangue (coal gangue) leachate Eh

Accompanying drawing 3 is the graph of Fe content of leachate of high sulfur and high iron gangue (coal gangue)

Accompanying drawing 4 is the graph of Mn content of leachate of high sulfur and high iron gangue (coal gangue)

Accompanying drawing 5 is the graph of high-sulfur high-iron gangue (coal gangue) leachate Cd content curve

Accompanying drawing 6 is the graph of Cr content of leachate of high sulfur and high iron gangue (coal gangue)

Accompanying drawing 7 is the graph of Zn content of leachate of high sulfur and high iron gangue (coal gangue)

Accompanying drawing 8 is the graph of Cu content of leachate of high sulfur and high iron gangue (coal gangue)

Accompanying drawing 9 is the graph of SO ₄ ^2- content of high-sulfur and high-iron gangue (coal gangue) leachate

Attached Table 1 is a summary table of the main metal ions and SO ₄ ^2- released from high-sulfur and high-iron gangue (coal gangue) before and after improvement

Attached Table 2 shows the impact on the basic indicators of high-sulfur and high-iron gangue (coal gangue) medium habitat conditions before and after improvement.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a basis for limiting the present invention.

Embodiment 1 of the present invention: a rapid improvement material of waste rock storage medium habitat, including passivation material and vegetation improvement material; the vegetation improvement material comprises by weight percentage: mixed anaerobic fermentation product 86%, phosphate rock powder 9% and sulfate-reducing flora 5%; the plant growth improvement material is prepared by the following method:

A. Preparation of mixed anaerobic fermentation

A1: mixture preparation: by weight percentage, 35% soybean meal and 65% mulberry litter are mixed;

A2: inoculate fermented soya bean microorganisms in the mixture of step A1, fermented soya bean microorganisms add-on amount is 1% of the total weight of mixture, adjust water content to be 60%, ferment under anaerobic condition 30 ℃ for 10 days to obtain mixed anaerobic fermented product;

B. Add phosphate rock powder and sulfate-reducing bacteria to the mixed anaerobic fermentation product in step A, and mix well to obtain a plant growth improvement material.

The fermented soya bean microorganism contains 60% bacteria and 40% fungus by weight percentage.

Described bacterium comprises by weight percentage: Cyanobacteria 55%, Firmicutes 37%, Actinomycetes and Proteobacteria total 8%; Described fungi comprises by weight percentage: Zygomycota Rhizoma 95% and Ascomycetes 5%.

Described passivation material comprises passivation material A and passivation material B, and described passivation material obtains by following method:

(1) Passivation material A: choose limestone with a CaCO3 content _of 82% to 90%, crush it to less than 50 mesh, and then add NaOH to modify the limestone so that its pH value reaches 9 to 11. .

(2) Passivation material B: crush the silica to less than 50 mesh, then add NaOH and mix it for modification, and add an appropriate amount of water to make the water content in the silica-NaOH system 40% to 50%, so that the pH is stable to 10-11, then dry the stabilized modified silica until the moisture content is 15%-20%, then add CaO ₂ to the dried silica, mix well, and seal it for storage. The amount of CaO ₂ added is 10% of the mass of the modified silica dried to a moisture content of 15%-20%.

A method for rapidly improving the medium habitat of gangue storage yards, specifically comprising the following steps:

(1) The waste coal gangue used was collected from the high-sulfur and high-iron coal gangue stockpile. The weathered coal gangue was collected and brought back to the laboratory.

(2) Add 5% passivation material A to the gangue by the weight of the gangue, react for 1 month, and wait for the pH to stabilize to 5-6;

(3) add 5% passivation material B in (2) by the weight of coal gangue, stabilize for 1 month, make the pH in the gangue system stabilize to about 6;

(4) Add 10% plant growth improvement material into (3) according to the weight of coal gangue, and mix well.

Embodiment 2 of the present invention: a rapid improvement material for the medium habitat of gangue stockpile, including passivation material and vegetation improvement material; the vegetation improvement material includes by weight percentage: mixed anaerobic fermentation product 85%, phosphate rock powder 10% and sulfate-reducing flora 5%; the plant growth improvement material is prepared by the following method:

A. Preparation of mixed anaerobic fermentation

A1: mixture preparation: by weight percentage, 40% soybean meal and 60% mulberry litter are mixed;

A2: Inoculate fermented soya bean microorganisms into the mixture of step A1, fermented soya bean microorganisms are added in an amount of 0.2% of the total weight of the mixture, the water content is adjusted to 55%, and fermented at 25° C. for 15 days under anaerobic conditions to obtain a mixed anaerobic fermented product;

B. Add phosphate rock powder and sulfate-reducing bacteria to the mixed anaerobic fermentation product in step A, and mix well to obtain a plant growth improvement material.

The fermented soya bean microorganism contains 45% bacteria and 55% fungus by weight percentage.

The bacterium comprises by weight percentage: cyanobacteria 50%, Firmicutes 40%, Actinomycetes and Proteobacteria total 10%; Ascomycetes 10%.

Described passivation material comprises passivation material A and passivation material B, and described passivation material obtains by following method:

(1) Passivation material A: choose limestone with a CaCO3 content _of 82% to 90%, crush it to less than 50 mesh, and then add NaOH to modify the limestone so that its pH value reaches 9 to 11. .

(2) Passivation material B: crush the silica to less than 50 mesh, then add NaOH and mix it for modification, and add an appropriate amount of water to make the water content in the silica-NaOH system 40% to 50%, so that the pH is stable to 10-11, then dry the stabilized modified silica until the water content is 15%-20%, then add CaO ₂ to the dried silica, mix well, and seal it for storage. The amount of CaO ₂ added is 12% of the mass of the modified silica dried to a moisture content of 15%-20%.

A method for rapidly improving the medium habitat of gangue storage yards, specifically comprising the following steps:

(1) The waste coal gangue used was collected from the high-sulfur and high-iron coal gangue stockpile. The weathered coal gangue was collected and brought back to the laboratory.

(2) According to the weight of coal gangue, add 10% passivation material A to coal gangue, react for 1 month, and wait for pH to stabilize to 5～6;

(3) add 12% passivation material B in (2) by the weight of coal gangue, stabilize for 1 month, make the pH in the gangue system stabilize to about 6;

(4) Add 10% plant growth improvement material into (3) according to the weight of coal gangue, and mix well.

Embodiment 3 of the present invention: a rapid improvement material of waste rock storage medium habitat, including passivation material and vegetation improvement material; vegetation improvement material includes by weight percentage: mixed anaerobic fermentation product 90%, phosphate rock powder 9% and sulfate-reducing flora 1%; the plant growth improvement material is prepared by the following method:

A. Preparation of mixed anaerobic fermentation

A1: mixture preparation: by weight percentage, 40% soybean meal and 60% mulberry litter are mixed;

A2: Inoculate fermented soya bean microorganisms into the mixture of step A1, fermented soya bean microorganisms are added in an amount of 1% of the total weight of the mixture, the water content is adjusted to 65%, and fermented at 35° C. for 10 days under anaerobic conditions to obtain a mixed anaerobic fermented product;

B. Add phosphate rock powder and sulfate-reducing bacteria to the mixed anaerobic fermentation product in step A, and mix well to obtain a plant growth improvement material.

The fermented soya bean microorganism contains 75% bacteria and 25% fungus by weight percentage.

The bacteria include by weight percentage: 60% of cyanobacteria, 35% of Firmicutes, 5% of actinomycetes and proteobacteria in total;

Described passivation material comprises passivation material A and passivation material B, and described passivation material obtains by following method:

(1) Passivation material A: choose limestone with a CaCO3 content _of 82% to 90%, crush it to less than 50 mesh, and then add NaOH to modify the limestone so that its pH value reaches 9 to 11. .

(2) Passivation material B: crush the silica to less than 50 mesh, then add NaOH and mix it for modification, and add an appropriate amount of water to make the water content in the silica-NaOH system 40% to 50%, so that the pH is stable to 10-11, then dry the stabilized modified silica until the moisture content is 15%-20%, then add CaO ₂ to the dried silica, mix well, and seal it for storage. The amount of CaO ₂ added is 5% of the mass of the modified silica dried to a moisture content of 15%-20%.

A method for rapidly improving the medium habitat of gangue storage yards, specifically comprising the following steps:

(1) The waste coal gangue used was collected from the high-sulfur and high-iron coal gangue stockpile. The weathered coal gangue was collected and brought back to the laboratory.

(2) According to the weight of coal gangue, add 2% passivation material A to coal gangue, react for 1 month, and wait for the pH to stabilize to 5～6;

(3) add 3% passivation material B in (2) by the weight of gangue, stabilize for 1 month, make the pH in the gangue system stabilize to about 6;

(4) Add 10% plant growth improvement material into (3) according to the weight of coal gangue, and mix well.

Embodiment 4 of the present invention: a rapid improvement material for the medium habitat of gangue storage yards, including passivation materials and vegetation improvement materials; the vegetation improvement materials include: 87% of mixed anaerobic fermentation products, phosphate rock powder 9% and sulfate-reducing flora 4%; the plant growth improvement material is prepared by the following method:

A. Preparation of mixed anaerobic fermentation

A1: mixture preparation: by weight percentage, 35% soybean meal and 65% mulberry litter are mixed;

A2: inoculate fermented soya bean microorganisms in the mixture of step A1, fermented soya bean microorganisms add-on amount is 1% of mixture gross weight, adjust water content to be 60%, under anaerobic condition 25 ℃ ferment 15 days to obtain mixed anaerobic fermented product;

B. Add phosphate rock powder and sulfate-reducing bacteria to the mixed anaerobic fermentation product in step A, and mix well to obtain a plant growth improvement material.

The fermented soya bean microorganism contains 55% bacteria and 45% fungus by weight percentage.

Described bacterium comprises by weight percentage: Cyanobacteria 55%, Firmicutes 40%, Actinomycetes and Proteobacteria total 5%; Described fungi comprises by weight percentage: Zygomycota Rhizoma 95% and Ascomycetes 5%.

Described passivation material comprises passivation material A and passivation material B, and described passivation material obtains by following method:

(1) Passivation material A: choose limestone with a CaCO3 content _of 82% to 90%, crush it to less than 50 mesh, and then add NaOH to modify the limestone so that its pH value reaches 9 to 11. .

(2) Passivation material B: crush the silica to less than 50 mesh, then add NaOH and mix it for modification, and add an appropriate amount of water to make the water content in the silica-NaOH system 40% to 50%, so that the pH is stable to 10-11, then dry the stabilized modified silica until the water content is 15%-20%, then add CaO ₂ to the dried silica, mix well, and seal it for storage. The amount of CaO ₂ added is 7% of the mass of the modified silica dried to a moisture content of 15%-20%.

A method for rapidly improving the medium habitat of gangue storage yards, specifically comprising the following steps:

(1) The waste coal gangue used was collected from the high-sulfur and high-iron coal gangue stockpile. The weathered coal gangue was collected and brought back to the laboratory.

(2) Add 7% passivation material A to the gangue by the weight of the gangue, react for 1 month, and wait for the pH to stabilize to 5-6;

(3) add 7% passivation material B in (2) by the weight of coal gangue, stabilize for 1 month, make the pH in the gangue system stabilize to about 6;

(4) Add 5% plant growth improvement material into (3) according to the weight of coal gangue, and mix well.

Embodiment 5 of the present invention: A rapid improvement material for the medium habitat of gangue stockpile, including passivation material and vegetation improvement material; the vegetation improvement material comprises by weight percentage: mixed anaerobic fermentation product 88%, phosphate rock powder 10% and sulfate-reducing flora 2%; the plant growth improvement material is prepared by the following method:

A. Preparation of mixed anaerobic fermentation

A1: mixture preparation: by weight percentage, 55% soybean meal and 45% mulberry litter are mixed;

A2: inoculate fermented soya bean microorganism in the mixture of A1 step, fermented soya bean microorganism add-on amount is 1.5% of mixture gross weight, adjust water content to be 60%, 35 ℃ of fermentations under anaerobic condition obtain mixed anaerobic fermentation product for 10 days;

B. Add phosphate rock powder and sulfate-reducing bacteria to the mixed anaerobic fermentation product in step A, and mix well to obtain a plant growth improvement material.

The fermented soya bean microorganism contains 65% bacteria and 35% fungus by weight percentage.

Described bacterium comprises by weight percentage: Cyanobacteria 58%, Firmicutes 32%, Actinomycetes and Proteobacteria total 10%; Described fungus comprises by weight percentage: Zygomycota Rhizoma 93% and Ascomycetes 7%.

Described passivation material comprises passivation material A and passivation material B, and described passivation material obtains by following method:

(1) Passivation material A: choose limestone with a CaCO3 content _of 82% to 90%, crush it to less than 50 mesh, and then add NaOH to modify the limestone so that its pH value reaches 9 to 11. .

(2) Passivation material B: crush the silica to less than 50 mesh, then add NaOH and mix it for modification, and add an appropriate amount of water to make the water content in the silica-NaOH system 40% to 50%, so that the pH is stable to 10-11, then dry the stabilized modified silica until the water content is 15%-20%, then add CaO ₂ to the dried silica, mix well, and seal it for storage. The amount of CaO ₂ added is 7% of the mass of the modified silica dried to a moisture content of 15%-20%.

A method for rapidly improving the medium habitat of gangue storage yards, specifically comprising the following steps:

(1) The waste coal gangue used was collected from the high-sulfur and high-iron coal gangue stockpile. The weathered coal gangue was collected and brought back to the laboratory.

(2) Add 5% passivation material A to the gangue by the weight of the gangue, react for 1 month, and wait for the pH to stabilize to 5-6;

(3) add 5% passivation material B in (2) by the weight of coal gangue, stabilize for 1 month, make the pH in the gangue system stabilize to about 6;

(4) Add 5% plant growth improvement material into (3) according to the weight of coal gangue, and mix well.

In order to demonstrate the effect of this vegetation improvement method on the release of the most important metal ions and SO ₄ ^2- in gangue (coal gangue) and the improvement of habitat, we have carried out relevant experiments. The coal gangue after the passivation treatment of the above five embodiments were respectively taken for testing. During the test:

(1) Fill the leaching column with a length of 50 cm and a diameter of 110 mm with coal gangue added with passivation material and coal gangue without passivation material, and take the annual rainfall in the local area, and divide it into five parts by leaching The coal gangue added with vegetation improvement materials and the coal gangue without any improved materials were leached respectively, and the coal gangue without any improved materials was used as the control (CK).

(2) After each leaching test, analyze the changes of coal gangue leachate pH, Eh, Fe, Mn, main heavy metals and SO ₄ ^2- and other indicators.

In the above experiments, three repetitions were set for the coal gangue experiment without any improved material and with the addition of vegetation improved material to reduce the experimental error.

Wherein the test data of embodiment 1 is as shown in table 1, table 2 and accompanying drawing 1-9.

Table 1 Effects of the most important metal ions and SO ₄ ^2- release in high-sulfur and high-iron gangue (coal gangue) before and after improvement

Table 2 Effects on basic physical and chemical indicators of high-sulfur and high-iron gangue (coal gangue) medium before and after improvement

As shown in the accompanying drawings and tables, the results show that adding vegetation improvement materials can reduce the dissolution of main metal ions and SO ₄ ^2- in coal gangue, and reduce the leaching amount of leachate, Eh, Fe, Mn, Cu, The content of Zn, Cd, Cr and SO ₄ ^2- can increase the pH value of the leachate to make it alkaline or slightly alkaline, and increase the content of nitrogen, phosphorus and available potassium in the gangue medium, and increase the bacteria, Increase the content of fungi and actinomycetes, increase the pH value of coal gangue, and reduce soil bulk density. The above test results show that the improvement of the coal gangue habitat is successfully achieved by using the vegetation improvement material and method of the present invention, the improvement effect is remarkable, and at the same time, the release of pollutants in the coal gangue is reduced.

The test results of other embodiments are similar to the test structure of implementation 1. The results show that a kind of rapid improvement material and method for the medium habitat of gangue storage yard provided by the present invention can effectively realize the improvement of coal gangue habitat, and the improvement effect Significantly, while reducing the release of pollutants in coal gangue.

The above are only specific application examples of the present invention. The present invention also has other implementation modes. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims (4)

1. A rapid improvement material for waste rock stockpile medium habitat, characterized in that: it includes passivation material and vegetation improvement material; the vegetation improvement material contains by weight percentage: mixed anaerobic fermentation product 85% ~ 90%, phosphorus 9% to 10% of mineral powder and 1% to 5% of sulfate-reducing bacteria; the plant improvement material is prepared by the following method: A. Preparation of mixed anaerobic fermentation A1: Mixture preparation: mix 35%～55% soybean meal and 45%～65% mulberry litter by weight percentage; A2: Inoculate Douchi microorganisms into the mixture of A1 step, the amount of Douchi microorganisms added is 0.2 to 1.5% of the total weight of the mixture, and ferment under anaerobic conditions to obtain a mixed anaerobic fermentation product; B. Add phosphate rock powder and sulfate-reducing flora to the mixed anaerobic fermentation product of step A, and mix to obtain plant growth improvement materials; The fermented soybean contains 45% to 75% of bacteria and 25% to 55% of fungi by weight percentage; the bacteria contains 50% to 60% of cyanobacteria and 30% to 55% of firmicutes by weight 40%, 1% to 10% of actinomycetes and proteobacteria; the fungi include by weight percentage: 90% to 100% of Zygomycetes and 0 to 10% of Ascomycetes; In said step A2, inoculate fermented soya bean microorganisms into the mixture of step A1, adjust its water content to 55%-65%, and ferment under anaerobic conditions at 25-35°C for 10-15 days to obtain the desired mixed anaerobic fermentation product ; Described passivation material comprises passivation material A and passivation material B, and described passivation material obtains by following method: Passivation material A: After the limestone is crushed, NaOH is added to modify the limestone so that its pH reaches 9-11; Passivation material B: Add NaOH to the pulverized silica and mix it evenly for modification, and add an appropriate amount of water to make the water content in the silica-NaOH system 40% to 50%, and stabilize the pH to 10 to 11. The stabilized modified silica is dried until the moisture content is 15% to 20%, and then CaO _{2 is added to the dried modified silica. The amount of CaO 2 added} is 5% to 5% of the mass of the dried modified silica. 12%. 2. The material for rapid improvement of medium habitat in waste rock yard according to claim 1, characterized in that: during the preparation process of the passivation material, limestone and silica are respectively crushed to below 50 mesh. 3. The material for rapidly improving the medium habitat of gangue storage yard according to claim 1, characterized in that: the content of CaCO ₃ in the limestone is 82% to 90%. 4. A method for rapidly improving materials as described in any one of claims 1-3, characterized in that: the specific method for improving comprises the following steps: (1) Loosen the gangue, add passivation material A and mix well, react until the pH is stable to 5-6; (2) Add passivation material B to the gangue reacted by passivation material A and mix evenly. The amount of passivation material B added is 3% to 12% of the dry weight of gangue; (3) Then add the vegetation improvement material to the passivated gangue, the amount of the vegetation improvement material added is 3% to 12% of the dry weight of the gangue, just mix well.

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