CN101781564B - Facility vegetable land soil modifier using magnesite tailings and preparation method thereof - Google Patents
Facility vegetable land soil modifier using magnesite tailings and preparation method thereof Download PDFInfo
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- CN101781564B CN101781564B CN2009103003053A CN200910300305A CN101781564B CN 101781564 B CN101781564 B CN 101781564B CN 2009103003053 A CN2009103003053 A CN 2009103003053A CN 200910300305 A CN200910300305 A CN 200910300305A CN 101781564 B CN101781564 B CN 101781564B
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Abstract
The invention relates to a soil amendment, in particular to a facility vegetable land soil amendment using magnesite tailings and a preparation method thereof, which solve the problems of soil acidification, salinization and the like on the facility vegetable land. The soil amendment comprises the following materials in percentage by weight: 90-95% of magnesite powder, 2-5% of lime nitrogen and 2-5% of zeolite powder. The preparation method of the soil amendment comprises the following steps: grinding the magnesite tailings into magnesite powder sieved by a 40-meshed sieve; and mixing the magnesite powder with powdery or granular lime nitrogen and the zeolite powder sieved by a 60-meshed sieve, and stirring fully until evenly blending, thus obtaining the soil amendment. The preparation method of the invention is simple and pollution-free, which can obviously improve the soil acidity and alkalinity environment of the facility vegetable land, and reduce exchangeable sodium saturation of the soil, and meanwhile has the effect of improving physical properties of the soil.
Description
Technical field
The present invention relates to soil improvement agent, be specially a kind of facility vegetable land soil amendment that utilizes magnesite tailings and preparation method thereof.
Background technology
The main component of magnesite is magnesiumcarbonate (MgCO
3).Magnisite contains tramp materials such as calcium, iron, manganese, silicon simultaneously.In China's magnesite reserves, the I and II product that contain MgO 〉=43% account for 53% of total reserves, and wherein the above magnesite reserves of first grade are 11.7 hundred million tons, account for 37.58% of total retained reserve, and 4.8 hundred million tons of seconds reserves account for 15.42% of total retained reserve.In the process of magnesite exploitation, at first be screening superfine or one-level rich ore, three grades of magnesite tailings are thrown away as waste mostly.In mining, (the domestic production light calcined magnesia is put into magnesite light-burned reflecting kiln sintering mostly at present to have 30% mineral powder of magnesite, grain etc. to go out of use approximately, raw material must be the piece material of granularity 〉=200mm), cause the significant wastage of resource, and mining area ecological environment is caused serious harm.For example, in Haicheng and area, Dashiqiao, it is poor that bargh takes richness to abandon, and low-grade magnesite is dropped, and directly piles up the gully, or take up an area of stacking (only the millions of tons of barren rock are just stacked by Haicheng City magnesium ore deposit one family).Cause the resource significant wastage, and form white pollution, have a strong impact on local environment.Stack white depleted magnesite everywhere, whole together day blank mist a slice of strong wind in spring, and this situation is more and more serious.In the depleted magnesite tailings, MgCO
3Content generally between 55-84%, arbitrarily stacking and dust pollution are comparatively serious, cause the mining area soil pH value significantly to raise, make soil generally be alkalescence or even strong basicity, soil available nitrogen, phosphorus, potassium content reduce significantly, and the soil weight significantly increases, and the top layer soil body seriously hardens, the reduction of moisture permeability, growth and development of plants are had a strong impact in the soil, and fertility sharply descends.Therefore, effectively utilizing the magnesite tailings resource is to cut down environmental pollution, the ecological effective measure of protection.
The China's Vegetable cultivated area is 1,970 ten thousand hectares, and wherein the facilities vegetable cultivated area reaches 2,500,000 hectares, accounts for more than 80% of world's facilities vegetable total area.Compare with the open country field of vegetables, intensive vegetable filed have following characteristics: the one, utilize the intensity height, and the usage frequency height, the multiple crop index height, planting density is big.Intensive vegetable filed recycle does not have time out substantially; The 2nd, fertilizer amount is big, be chemical fertilizer or fertilizer all considerably beyond the crop requirement, nitrogenous fertilizer is excessive, and to use phenomenon very general.As the intensive vegetable filed annual per hectare of Liaoning Area execute the fertilizer that becomes thoroughly decomposed up to 80 tons, chemical fertilizer is up to 4000 kilograms; The 3rd, soil secondary salinization, soil acidification, the soil-borne disease that high temperature, high humidity, sealing or semiclosed environment cause is serious etc.Increase along with intensive vegetable filed working life, soil exchangeable sodium ion and potassium concentration and hydrogen ion increase, and exchangeable calcium ion and magnesium ion content reduce, nitrate ion content significantly increases in the soil solution, because exchangeability ionic concn imbalance, vegetable crop nutrition absorption etc. is caused detrimentally affect.The direct result of China's field of vegetables high strength utilization, a large amount fertilising is field of vegetables sustainable use ability drop, vegetable crop and downgrade, and soil acidification and salinification are one of major limitation sex factors of the intensive vegetable filed sustainable use of influence.
At present, the utilization of China's magnesite tailings still is in the starting stage, and a large amount of mine tailings become important pollution sources, and the relevant ecological treatment technology is badly in need of in governments at all levels and mining area.Chinese invention patent notification number CN100368295C has invented a kind of method of utilizing magnesite tailings to produce Magnesium Carbonate Light 41-45, Chinese invention patent publication number CN1884170A discloses the method for utilizing mineral powder of magnesite, grain sintered magnesia in tunnel furnace, these methods mainly are to utilize relatively low giobertite of grade or waste, but energy consumption and cost are all higher, it is relatively large to apply difficulty, through direct lack of utilizing relative with approach of technology after the physical pulverization, directly the utilisation technology of the modifying agent of as fertilizer sources or special soil still less to magnesite tailings.The present invention makes facility vegetable land soil amendment as major ingredient, for the recycling of magnesite tailings is opened up a new way by after magnesite tailings is carried out physical pulverization.
Summary of the invention
The object of the present invention is to provide a kind of facility vegetable land soil amendment that utilizes magnesite tailings and preparation method thereof, it is that a kind of technology is simple, raw material is sufficient, with low cost, improved effect significantly utilizes magnesite tailings powder, lime nitrogen and zeolite powder to make the method for facility vegetable land soil amendment for main raw material, be used for the acidifying of prevention and control protected horticultural vegetable field soil and and salinification, solving intensive vegetable filedly influences the problem of its sustainable use because of soil quality descends.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of facility vegetable land soil amendment that utilizes magnesite tailings, main raw material by weight percentage, magnesite breeze 90-95%, lime nitrogen 2-5%, zeolite powder 2-5%.
The preparation method of above-mentioned facility vegetable land soil amendment earlier pulverizes the magnesite breeze of making 40 mesh sieves with magnesite tailings, mixes with powdery or particulate state lime nitrogen, the zeolite powder of crossing 60 mesh sieves again, and fully stirring after mixing, is made soil improvement agent.
The preparation method of above-mentioned magnesite breeze: the magnesite tailings ore powder of crossing 40 mesh sieves can directly be used, and it is 1-30 centimetre of fritter that the mine tailing ore that volume is bigger becomes granularity with Mechanical Crushing, puts into ball mill with ore particle and grinds, and crosses 40 mesh sieves, and is standby.
The present invention utilizes in the magnesite tailings in contained magnesiumcarbonate, the lime carbonate and acid ion in intensive vegetable filed, regulates the ratio of calcium in the base cation, magnesium, potassium ion and sodium ion, reduction soil acidity and salinification process; Leaching loss, the adsorption that utilizes zeolite and the ion-exchange that utilizes lime nitrogen to suppress nitrate ion in the soil reaches protects the fertilizer efficiency fruit.
The present invention has following advantage:
1. technology of the present invention is simple, pollution-free, implements easily, not only is fit to batch production production, also is fit to individual producer and produces.
2. raw material abundance of the present invention, used main raw material is cheap, and magnesite tailings is the industry and mining waste, and the market value of lime nitrogen is a 2500-3000 per ton unit, and fertilizer additive is a 300-500 per ton unit with the natural zeolite market value.
3. magnesite tailings is a kind of industry and mining waste among the present invention, makes soil improvement agent and can effectively utilize waste resource, reduce environmental pollution, serving agriculture production.
4. composition of raw materials is reasonable among the present invention, and every kind of raw material all has distinctive effect: (1) magnesite tailings has stronger alkalescence, but under the acid soil condition hydrogen ion in the sweetening of the soil after the hydrolysis, thereby improve the soil acidity or alkalinity condition; Elements such as contained magnesium, calcium, iron, manganese all are the biological essential nutritive elements of crop in the magnesite tailings, can improve the intensive vegetable filed unbalance situation of middle trace element that causes because of high yield; (2) lime nitrogen is a kind of nitrogen manure (nitrogenous about 20%), also is a kind of nitrification inhibitor, can effectively prevent in the soil migration of nitrate leaching, and polluted underground water has the effect of the soil-borne disease of preventing and treating simultaneously; (3) natural zeolite has very strong ion-exchange and ion adsorption capacity, but active adsorption ammonium ion, nitrate radical and other positively charged ions, effectively improve the utilization ratio of chemical fertilizer and organic fertilizer, improve soil base exchange capacity 10-15%, in and protected horticultural vegetable field soil in acidity, making in the soil obviously increases greater than 0.25 millimeter coacervate content.
5. the present invention can significantly improve the potential of hydrogen condition and the base cation composition of protected horticultural vegetable field soil, reduces soil acidification and salinification that intensive vegetable filed long-term planting causes, can directly improve soil physical and chemical property, improves fertility.
Embodiment
Among the present invention, the magnesite breeze is a magnesite tailings breeze of pulverizing 40 mesh sieves.Magnesite tailings is meant the depleted mineral powder of magnesite that produces in the low-grade waste that produces in the recovery process or ore dressing, the transportation, grain etc.The mine tailing that the present invention selects for use the Haicheng mineral to produce, the major ingredient weight ratio is as follows: magnesium oxide 35-43%, silicon oxide 2.5-3.2%, aluminum oxide 0.4-0.6%, calcium oxide 1.8-2.4%, ferric oxide 2.5-3.6%, loss on ignition 51-53%, surplus is an impurity.
Among the present invention, lime nitrogen (formal name used at school is a cyanamide calcium) is commercially available powdery or granular product, grey black look oiliness particle, by weight percentage, product reaches following standard: the nitrogenous 17-23% of lime nitrogen contains calcium oxide 40-50%, all the other are impurity, and pH is 11.0-12.5.More than 10 these products of tame manufacturer production such as Ningxia Darong Chemical and Metallurgy Co., Ltd..
Among the present invention, zeolite powder is the commercially available prod that natural zeolite is crossed the 60-100 mesh sieve after crushed, the main chemical compositions of natural zeolite powder is by weight percentage: silicon-dioxide 64-69%, titanium dioxide 0.08-0.13%, aluminium sesquioxide 12-13%, ferric oxide 0.8-1.5%, magnesium oxide 0.1-1.2%, calcium oxide 1.7-3.6%, sodium oxide 0.3-2.6%, potassium oxide 1.1-3.0%, surplus is an impurity.Physical and chemical index reaches following standard: ammonium exchange capacity 1000-2000 mmole/kilogram, pH value 7.2-9.0.
Because lime nitrogen is powdery or particulate state, its dust is harmful, therefore should note following item during concrete operations: operator must wear eye shield, mouth mask, rubber gloves during making, wear trousers long sleeves operation clothing, have damaged boots, in order to avoid lime nitrogen directly contacts with human body skin.In a single day lime nitrogen contacts skin, use soap, flushing with clean water immediately; As be strayed into eyes, in time use flushing with clean water.To arrive when serious in time to send to hospital and implement treatment.Operator must not drink any beverage that contains alcohol in 20 hours before and after operation.
Embodiment 1
With 92 kilograms of magnesite breezes, 4 kilograms of lime nitrogens, 4 kilograms of mixing of zeolite powder, fully stir, after mixing, make soil improvement agent.
Embodiment 2-7
Difference from Example 1 is proportioning raw materials difference (seeing Table 1) to some extent, and the preparation method is with embodiment 1.
Table 1
| Numbering | Magnesite tailings powder (kilogram) | Lime nitrogen (kilogram) | Natural zeolite powder (kilogram) |
| 2 | 90 | 5 | 5 |
| 3 | 92 | 5 | 3 |
| 4 | 92 | 3 | 5 |
| 5 | 95 | 2 | 3 |
| 6 | 95 | 3 | 2 |
| 7 | 95 | 2.5 | 2.5 |
Application examples 1
Selecting the ShenYang, Liaoning Province suburban area is 3 of the facilities vegetable booths (kinds plant is a cucumber) in 8 years, 12 years, 15 years working life, and test being provided with 3 processing, and wherein 2 for applying the modifying agent among the embodiment 1, and 1 for contrasting.100 square metres of sub-district areas, twice repetition, bulk application period before mid-January, cucumber claimed to plant, evenly apply 30 kilograms and 60 kilograms of embodiment 1 soil improvement agents according to per 667 square metres, control treatment is not executed modifying agent, before fertilising, fertilising measured 0-20 cm layer of soil soil pH value in back 30 days, the soil exchangeable base cation is formed, the exchangeable sodium ion accounts for the ion mol ratio (exchangeable sodium ion saturation ratio) of exchangeable base total amount in the calculating soil, correlation test the results are shown in Table 2.
Table 2 test is handled and soil property changes
Test-results shows, uses the embodiment of the invention 1 soil improvement agent, compared with the control, and the pH value of intensive vegetable filed acidified soil 0.6-1 the unit that can rise, the soil exchangeable sodium ion saturation ratio 7.14-14.90% that can descend.
Claims (5)
1. facility vegetable land soil amendment that utilizes magnesite tailings, it is characterized in that: by weight percentage, this soil improvement agent raw material is magnesite breeze 90-95%, lime nitrogen 2-5%, zeolite powder 2-5%.
2. the preparation method who utilizes the facility vegetable land soil amendment of magnesite tailings according to claim 1, it is characterized in that: magnesite tailings is pulverized made the magnesite breeze earlier, mix with lime nitrogen, zeolite powder again, fully stir, after mixing, make soil improvement agent.
3. the preparation method of facility vegetable land soil amendment according to claim 2, it is characterized in that: the magnesite tailings ore powder of crossing 40 mesh sieves can directly be used, it is 1-30 centimetre of fritter that the mine tailing ore that volume is bigger becomes granularity with Mechanical Crushing, put into ball mill with ore particle and grind, cross 40 mesh sieves.
4. the preparation method of facility vegetable land soil amendment according to claim 2, it is characterized in that: described lime nitrogen is powdery or particulate state.
5. the preparation method of facility vegetable land soil amendment according to claim 2, it is characterized in that: described zeolite powder was the zeolite powder of 60 mesh sieves.
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| CN2009103003053A CN101781564B (en) | 2009-01-21 | 2009-01-21 | Facility vegetable land soil modifier using magnesite tailings and preparation method thereof |
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| CN101781564B true CN101781564B (en) | 2011-06-08 |
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Families Citing this family (10)
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| CN102002368B (en) * | 2010-09-30 | 2014-07-02 | 青岛农业大学 | Prescription and preparation method of acidified soil conditioner |
| CN102503728B (en) * | 2011-11-21 | 2013-03-20 | 浙江大学 | Modifier for acidized bamboo soil and application thereof |
| CN103275726B (en) * | 2013-06-03 | 2015-11-04 | 烟台三合生物科技有限公司 | A kind of preparation method of soil redeposition |
| CN104962291A (en) * | 2015-07-13 | 2015-10-07 | 郭杰 | Soil restoration improving agent and preparing method of soil restoration improving agent |
| CN105503476A (en) * | 2016-01-06 | 2016-04-20 | 中山市绿浪助剂有限公司 | Soil conditioning fertility intensifier |
| CN106883859B (en) * | 2017-02-23 | 2018-03-02 | 福建省玛塔农业发展有限公司 | Soil conditioner and its protectiveness preparation technology |
| CN108329926A (en) * | 2018-05-12 | 2018-07-27 | 黄河勘测规划设计有限公司 | A kind of organic inorganic hybridization type soil waterproofing agent |
| CN110079332B (en) * | 2019-05-09 | 2021-05-07 | 上杭鑫昌龙实业有限公司 | Soil conditioner and preparation method and use method thereof |
| CN113149777A (en) * | 2021-04-25 | 2021-07-23 | 中国热带农业科学院环境与植物保护研究所 | Secondary salinization soil conditioner for greenhouse vegetable field and application of secondary salinization soil conditioner |
| CN113504344B (en) * | 2021-08-18 | 2022-04-26 | 中国科学院南京土壤研究所 | Method and device for evaluating long-acting performance of acid soil conditioner |
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| CN1935401A (en) * | 2006-05-31 | 2007-03-28 | 清华大学 | Acidated forestry soil repairing method |
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Patent Citations (3)
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|---|---|---|---|---|
| KR20060012861A (en) * | 2004-08-05 | 2006-02-09 | 주식회사 효석 | The method of granular a soil conditioner making from the by-product of slag and a gypsum |
| CN1935401A (en) * | 2006-05-31 | 2007-03-28 | 清华大学 | Acidated forestry soil repairing method |
| CN101240172A (en) * | 2007-02-07 | 2008-08-13 | 中国科学院沈阳应用生态研究所 | Mixing soil conditioner and its preparation method |
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