CN104312593A - Method for preparing acidic soil conditioner by using carbide slag - Google Patents
Method for preparing acidic soil conditioner by using carbide slag Download PDFInfo
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- CN104312593A CN104312593A CN201410556584.0A CN201410556584A CN104312593A CN 104312593 A CN104312593 A CN 104312593A CN 201410556584 A CN201410556584 A CN 201410556584A CN 104312593 A CN104312593 A CN 104312593A
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- carbide slag
- soil conditioner
- acidic soil
- aeration
- humic acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to a method for preparing an acidic soil conditioner by using carbide slag. The method is characterized by comprising the following steps: mixing carbide slag which is aerated, rinsed and filtered with humic acid to react, wherein the reaction temperature is 300-400 DEG C; and controlling the power of hydrogen(pH) of the reaction product to be 9-11 to obtain the acidic soil conditioner, wherein the weight ratio of the treated carbide slag to humic acid is as follows: 70-95% of carbide slag and 5-30% of humic acid. The method provided by the invention has the advantages that a lot of acidic soil in south can be effectively adjusted, and concentration of heavy metals in soil and crops is effectively reduced, so that the purpose of repairing heavy metal pollution is achieved; the conditioner contains a lot of elements such as calcium, magnesium and silicon and the like, so that the conditioner has a promoting effect to growth of crops.
Description
Technical field
The present invention relates to a kind of method utilizing carbide slag to manufacture acidic soil conditioner, belong to the agricultural use technical field of carbide slag.
Background technology
In calcium carbide process PVC technique, acetylene section produces a large amount of carbide slags.Carbide slag main component is Ca(OH)
2, account for 70-90%(butt), alkalescence comparatively strong (pH value is greater than 12).Carbide slag is also containing objectionable impuritiess such as partial vulcanization things, and water content is large, and physical behavior is poor, and be difficult to process, according to " Hazardous wastes judging standard " (GB5085-1996), carbide slag belongs to II class general industrial solid waste; If be directly discharged in seawall or mountain valley, adopt and fill out sea, when filling out regular stackings of ditch, according to " chemical sludge Landfill Site Design regulation " HG20504-92, II class general industry solid is given up (thing) slag, must seepage control measure be taked and make landfill stabilization.
At present, the common disposal options of carbide slag is landfill or stacking of building a dam, take a large amount of soils and there is huge environmental risk, along with the reinforcement of people's environmental consciousness, country put into effect about solid waste process dispose relevant policies and laws and regulations, carbide slag be treated as a PVC enterprise difficult problem urgently to be resolved hurrily.And on the other hand, containing several mineral materials such as a large amount of Ca, Si, Mg, Fe in carbide slag, be the necessary Meso-and micro-nutrients of crop growth, these materials have good effect to improvement acid soil, if do not utilized fully, great waste will be caused.
In the treatment technology of industrial solid castoff, forefathers have done a few thing, but most for the treatment of process means are complicated, agricultural use lacks specific aim, or element is single, more comprehensive nutritive ingredient can not be provided for farm crop, particularly for southern area acidification soil, the product only simple proterties of imitating lime of exploitation, often cause usage quantity excessive, effect is not ideal enough, and excessive use causes soil compaction, cause the excessive decomposition of the soil organism and occur the shortcomings such as soil fertility exhaustion, the appearance of the problem causing Soil degradation etc. new.
Summary of the invention
The object of the invention is to the defect overcoming existing acid soil improvement product, provide a kind of carbide slag that utilizes through the humic acid modified production method manufacturing acidic soil conditioner of organic materials.
What the present invention relates to utilizes the method for carbide slag manufacture acidic soil conditioner as follows:
By through the carbide slag of aeration, rinsing, filtration treatment and humic acids hybrid reaction, temperature of reaction 300 DEG C-400 DEG C, controls, at pH9-11, namely to become acidic soil conditioner by the potential of hydrogen of reaction product; Wherein treated carbide slag with the mixed weight ratio of humic acids is: carbide slag 70%-95%, humic acid 5%-30%.
Described carbide slag is by the waste residue produced in calcium carbide process PVC production technique.
The aeration of described carbide slag, rinsing, filtration treatment are that carbide slag is placed in aeration still, add water and make pulpous state mixed solution, stir and complete aeration, rinsing in more than 30 minutes, then through 60 object screen filtrations, finally dewater; Wherein: the velocity of rotation 200-240 rev/min of impeller in aeration still.
Containing acidic groups in described humic acids is 3-5mmol/g, and pH value is 2.0-4.0.
Beneficial effect of the present invention is as follows:
Purport of the present invention be utilize carbide slag to be rich in calcium hydroxide to improve acid soil, meanwhile, by the abundant middle trace mineral nutritive ingredient be rich in carbide slag, and the combination of the organic composition of humic acid, the activity of the acid heavy metal in soil of passivation, significantly improves the output of farm crop, improves the quality of agricultural-food.
The present invention utilizes acid function group in humic acids, in and the OH of carbide slag neutral and alkali
-, make the potential of hydrogen of carbide slag be down to pH9-11, make soil conditioner product be more suitable for the improvement of acid soil.Meanwhile, humic acids also has improvement Soil structure, can promote that soil aggregate is formed.Humic acids is conducive to the adjustment of soil Zhong Shui, fertilizer, gas, thermal conditions.When soil aggregate improves, its unit weight reduces, voidage increases, and possesses good permeability.Micro-Fe, Mn, Cu, Zn etc. that humic acids can exist with some difficulty soluble salt forms form complex compound, water-soluble absorbed by crops.In addition, the C/N ratio of all right adjustment of acidity soil of humic acids, microorganism useful in activating soil, thus the acid soil fertility of degeneration is rebuild.
The soil of excessive acidifying is along with the rising of pH value, heavy metal element harmful in soil obtains passivation, the biological effectiveness of the heavy metals such as Cd, Pb, As reduces greatly, thus to have blocked in acid soil heavy metal element to crop field upper part transport accumulation, reaches the effect of results Safe Agricultural Product.
Present invention reduces the pressure that carbide slag brings PVC industry, completely eliminating carbide slag may pollution on the environment.
Manufacture craft of the present invention is simple, is easy to extensive industrialized implementation, is more conducive to the large scale application in agriculture production.
Embodiment
The following stated is only the embodiment that section of the present invention adopts, and does not therefore limit the protection domain invented.
The present invention mainly utilizes carbide slag as a kind of main starting material to produce acidic soil conditioner, and to utilize consumption carbide slag as much as possible, reduce the pressure that carbide slag brings PVC industry, thoroughly eliminating carbide slag may pollution on the environment simultaneously.
Carbide slag of the present invention is by the waste residue produced in calcium carbide legal system polyvinyl chloride (PVC) process.By through the carbide slag of aeration, rinsing, filtration treatment and humic acids hybrid reaction, make acidic soil conditioner.Wherein aeration adopts mechanical aeration, mechanical aeration is bottom impeller being installed on opening aeration still, utilize the rotation of impeller, make to form circulation in aeration still, constantly update gas, liquid contact surface and continuous oxygen uptake and form hydraulic jump, make liquid vigorous agitation and wrap up in into air, forming low pressure area, sucking air with oxygenation.The object of aeration makes to obtain enough oxygen in water body, water body contacts with gas and carries out dissolved oxygen or loose except dissolved gas and volatile matter in water body, to improve dissolved oxygen concentration, reach the object of the stink removing carbide slag liquid, the object of rinsing is the impurity effectively reducing carbide slag, improve the purity of calcium hydroxide in carbide slag, tap water is added in the process of rinsing mainly mechanical aeration at normal temperatures in present method, these two complete among same step, more than common implementing 30min, mechanical aeration is rinsed that carbide slag effectively can remove the carbon slag entered in carbide slag and the granular feedstock not completing reaction through 60 object screen filtrations, the objectionable impuritiess such as the sulfide contained by this carbide slag are substantially oxidized, long influential inorganic salts is generated to plant and is reduced to safe level, become innoxious carbide slag of the present invention.
Method of the present invention makes treated carbide slag and humic acids hybrid reaction according to a certain percentage, and humic acids is the natural macromole aromatic hydroxyl carboxylic hydroxy acid of a class.Humic acids is extensively present in the soil organism, peat, brown coal, weathered coal and lake and oceanic sediment, forms regeneration humic acids through artificial oxidation's (as by air, ozone or nitric acid treatment).The method extracted first uses acid treatment, and slough part mineral substance again with dilute alkaline soln extraction, extraction liquid is acidified with acid, and can obtain humic acids precipitation.Humic acids outward appearance is that brown arrives chocolate.The hybrid reaction weight ratio of carbide slag and humic acids is: carbide slag accounts for 70-95%, and humic acids accounts for 5-30%, and one of them is implemented ratio preferably and is: carbide slag 80%, humic acids accounts for 20%.Because described humic acids contains acidic groups 3-5mmol/g, and the pH value of carbide slag is about 12-13, so in reaction process, the carbide slag of partial alkaline and humic acids generation neutralization reaction, generate the calcium humate of small part, R(COOH)
4+ 2Ca(OH)
2→ R(COO)
4ca
2+ 2H
2o, releases certain heat, and simultaneously dry and comfortable humic acids by water adsorption a certain amount of in carbide slag, thus changes the physical behavior of the sticky weight of carbide slag.Carbide slag and humic acids generation neutralization reaction are carried out in the process of 300 DEG C of-400 DEG C of hyperthermia dryings, the CO in the carbide slag of alkalescence and drying course in the flue gas that produces of humic acids
2abundant contact reacts, makes the alkalescence of carbide slag be reduced to pH9 ~ 11 further, then through pulverizing, sieving, pack, final production goes out the acidic soil conditioner product of powdery.
Utilize aforesaid method can produce the acidic soil conditioner meeting relevant national standard.Product not only improves acid soil successful, and can significantly improve crop yield, obviously improves quality of agricultural product.
Carbide slag, for the manufacture of acidic soil conditioner, is turned waste into wealth, and turns harm into good, and the Sustainable development for industrial or agricultural opens new approach, and for fertilizer industry have found new growth engines, economic benefit, social benefit and environmental and ecological benefit develop simultaneously.
Embodiment: carbide slag is after aeration, rinsing, filtration, and mixed with humic acids by the carbide slag of process, wherein the blending ratio of each component is: this proportion by subtraction carbide slag accounts for 70% by weight, and humic acids accounts for 30%.After mixing, drying, pulverize, sieve to obtain powdery acidic soil conditioner.
In the acidic soil conditioner adopting method of the present invention to produce, containing a large amount of activated silica elements, element silicon has passivation for heavy metal, can effectively reduce heavy metal in soil activity; The pH of acidic soil conditioner is between 9-11, effectively can regulate the acid soil that south is a large amount of, after the pH value raising of soil, the activity of heavy metal and solvability reduce, heavy metal is converted into the compound of indissoluble, the absorption of farm crop heavy metal reduces, thus effectively reduces heavy metal concentration in soil and farm crop, reaches the object of repairing heavy metal pollution; Containing a large amount of elements such as calcium, magnesium, silicon in acidic soil conditioner, the growth for farm crop has promoter action.
Claims (4)
1. the method utilizing carbide slag to manufacture acidic soil conditioner, it is characterized in that: by through the carbide slag of aeration, rinsing, filtration treatment and humic acids hybrid reaction, temperature of reaction 300 DEG C-400 DEG C, controls, at pH9-11, namely to become acidic soil conditioner by the potential of hydrogen of reaction product; Wherein treated carbide slag with the mixed weight ratio of humic acids is: carbide slag 70%-95%, humic acid 5%-30%.
2. the method utilizing carbide slag to manufacture acidic soil conditioner according to claim 1, is characterized in that: described carbide slag is by the waste residue produced in calcium carbide process PVC production technique.
3. the method utilizing carbide slag to manufacture acidic soil conditioner according to claim 1, it is characterized in that: the aeration of described carbide slag, rinsing, filtration treatment are that carbide slag is placed in aeration still, add water and make pulpous state mixed solution, stir and complete aeration, rinsing in more than 30 minutes, then through 60 object screen filtrations, finally dewater.
4. the method utilizing carbide slag to manufacture acidic soil conditioner according to claim 1, is characterized in that: containing acidic groups in described humic acids is 3-5mmol/g, and pH value is 2.0-4.0.
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| CN201410556584.0A CN104312593A (en) | 2014-10-20 | 2014-10-20 | Method for preparing acidic soil conditioner by using carbide slag |
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|---|---|---|---|
| CN201410556584.0A CN104312593A (en) | 2014-10-20 | 2014-10-20 | Method for preparing acidic soil conditioner by using carbide slag |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753393A (en) * | 2016-12-25 | 2017-05-31 | 广东地球土壤研究院 | It is a kind of with potassium feldspar and the soil conditioner of carbide slag as primary raw material and preparation method thereof |
| CN107841311A (en) * | 2017-10-24 | 2018-03-27 | 潍坊友容实业有限公司 | Complex biological modifying agent and its application process are used in alkaline land soil improvement |
| CN109796988A (en) * | 2019-04-02 | 2019-05-24 | 河北民族师范学院 | The method for producing soil conditioner as raw material using abandoned biomass and carbide slag |
| CN114213196A (en) * | 2021-12-22 | 2022-03-22 | 安徽华塑股份有限公司 | Low-cost recycling process for carbide slag in acetylene production |
| CN114907859A (en) * | 2022-05-31 | 2022-08-16 | 中国农业大学 | Organic-inorganic acid soil conditioner and preparation method and application thereof |
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| CN102220136A (en) * | 2011-03-30 | 2011-10-19 | 中国科学院亚热带农业生态研究所 | Soil heavy metal composite passivator with humic acid minerals and preparation method thereof |
| CN103143556A (en) * | 2013-02-07 | 2013-06-12 | 广东省农业科学院农业资源与环境研究所 | Passivating agent for reducing cadmium activity of acidic vegetable soil and use method thereof |
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2014
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753393A (en) * | 2016-12-25 | 2017-05-31 | 广东地球土壤研究院 | It is a kind of with potassium feldspar and the soil conditioner of carbide slag as primary raw material and preparation method thereof |
| CN107841311A (en) * | 2017-10-24 | 2018-03-27 | 潍坊友容实业有限公司 | Complex biological modifying agent and its application process are used in alkaline land soil improvement |
| CN109796988A (en) * | 2019-04-02 | 2019-05-24 | 河北民族师范学院 | The method for producing soil conditioner as raw material using abandoned biomass and carbide slag |
| CN114213196A (en) * | 2021-12-22 | 2022-03-22 | 安徽华塑股份有限公司 | Low-cost recycling process for carbide slag in acetylene production |
| CN114907859A (en) * | 2022-05-31 | 2022-08-16 | 中国农业大学 | Organic-inorganic acid soil conditioner and preparation method and application thereof |
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Application publication date: 20150128 |