CN109536178A - A kind of baking-free type rice straw base soil conditioner and preparation method thereof - Google Patents
A kind of baking-free type rice straw base soil conditioner and preparation method thereof Download PDFInfo
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- CN109536178A CN109536178A CN201811629096.2A CN201811629096A CN109536178A CN 109536178 A CN109536178 A CN 109536178A CN 201811629096 A CN201811629096 A CN 201811629096A CN 109536178 A CN109536178 A CN 109536178A
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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
- C09K2101/00—Agricultural use
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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
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Abstract
The invention discloses a kind of baking-free type rice straw base soil conditioner and preparation method thereof, the raw material of the baking-free type rice straw base soil conditioner are as follows: 5-40 parts of rice straw powders, 5-55 parts of hydrogen peroxide, 5-15 parts of calcium lime powders, 5-15 parts of gypsum powders, 30-50 parts of natural porous clays, 30-60 parts of deionized waters.Through mixing, pugging, molding, air-dry get product.Compared with prior art, the present invention is compounded using hydrogen peroxide with quick lime, it forms oxidation and heating condition completes the surface treatment of stalk, using gypsum water suction, quick lime meet water and air curing, clay from it is sticking the features such as realize the cured effect of natural air drying after material molding, without drying and roasting processing, method energy conservation and environmental protection three-waste free discharge.Nutrients such as the gas permeability of soil, passivation soil activation heavy metal, conditioning soil pH, increase soil ion exchange capacity, supplement Ca, Mg, Si and other effects can be significantly improved after application, effectively administer farmland soil heavy metals pollution.
Description
Technical field
The invention belongs to agriculture and forestry organic waste material resource utilization and soil remediation fields, and in particular to a kind of baking-free type rice straw
Stalk base soil conditioner and preparation method thereof.
Background technique
The stalk amount that crops generate is up to 900,000,000 tons, the stalk amount accounting highest that rice straw is generated in crops, up to 200,000,000
Ton.It includes that decomposition into field, mulching and returning, three kinds of Mechanical Crushing direct returning to farmland are main that the comprehensive Utilization Ways of stalk, which mainly have returning to the field,
Mode, feed processing, straw fuel gas, straw burning power generation, civilian manufactured goods etc..Wherein make livestock feed for about 200,000,000 tons, 0.2 hundred million
Ton makees commercial paper or the raw material of industry, and 1.8 hundred million tons are used by peasant as life fuel, and 100,000,000 tons of broken careless returning to the field make fertilizer, is left
400000000 tons of stalk almost all burn-ups are abandoned on field side.A large amount of stalk is incinerated and heap is abandoned everywhere, not only causes resource
Waste, also result in atmosphere pollution, a large amount of society such as soil degradation, fire incident, traffic jam, look of a village are destroyed, it is economical and
Ecological problem, pushing stalk comprehensive utilization is a big important topic.
It is a kind of preferable Land use systems that agricultural crop straw, which is processed into charcoal, at present, but carbonizes normal companion in process
The products such as angry state, liquid, carbonization method for straws and equipment etc. are studied by more attention, if without set of association
Air-liquid solution, straw charring technique also be easy to cause biggish environmental pollution, therefore straw charcoal produces research and development main flow direction master
It is to improve producing equipment, increases the recycling and utilization of association by-product such as tar, wood vinegar, combustible gas.
As Tanghe Yixuan County Environmental Protection Equipment Co., Ltd. discloses a kind of producer of straw charcoal in CN103937517A
Method is that the flammable plant such as stalk is carried out compression molding, is then placed in retort and is carbonized, work continuously and obtain stalk
The method of charcoal: first compressing raw material, then compressed raw material is put into circular form feeding device and enters retort, adjusts charcoal
Change in-furnace temperature, the gases such as carbon monoxide generated in water, tar and the production process being discharged in raw material adjust charcoal later
Change furnace in temperature to 650 DEG C, at this time raw material at high temperature destructive distillation at charcoal；Finished product cools down stand-by after coming out of the stove；Circular form charging dress
Setting is carrier that raw material enters furnace, and finished product is carried to the carrier come out of the stove, it makes raw material enter furnace while finished product capable of being made to come out of the stove, should
Equipment moves in circles use, makes to produce lasting progress；Gas decomposer is the water, vapour, flammable generated in raw material carbonization process
Gas etc. is decomposited from raw material to be come, and be heated vaporization discharge retort；Current product is solved containing carbon density is small, calorific value is low, secondary
Product rate height, problem at high cost.
Dalian Xing Long cultivates new energy development Co., Ltd and then discloses a kind of environment-friendly type agricultural crop straw in CN104119934A
Charcoal production and tar, haze tallow liquid recovery system, including conveyer and air-introduced machine, it is characterised in that conveying and dedusting in systems
Installed retort between device, tar separator installed between deduster and gas-liquid separator, gas-liquid separator with draw
Haze tallow liquid/gas separator has been installed between blower.The inner walls block of retort has refractory brick, and centre is equipped with air duct, and here is cooling
Layer；Tar separator upper part of the housing equably fills more double fluid tube banks, is equipped with tar recovery layer in the body of lower end.The invention is by stalk
It is converted to charcoal, saves a large amount of energy, has recycled tar and haze tallow liquid valuable cargo；Labor intensity is low, is conducive to environment guarantor
Shield, pollution-free, stable product quality, high production efficiency.
Straw carbon obtained due to biggish specific surface area, flammable, flourishing pore structure and surface functional group abundant,
It is usually used in the main side of soil conditioner.As Chengdu XinKeLi chemical engineering Science Co., Ltd discloses one kind in CN107266196A
Straw charring also field soil improving agent and preparation method are pre-separated phenol, ethyl alcohol etc. by straw charring, obtain stalk
Charcoal, brown coal powder adsorb the soil conditioner that the zeolite of wood vinegar forms, and the soil particle of dispersion can be promoted to reunite, the group of being formed
Grain increases content and stability that water in soil stablizes granule, improves ventilating permeable, water-retaining property, nutrient preserving capability.
Zhejiang University CN102422734A relates to the use of the method for rice straw charing returning to the field improvement water paddy soil, step
It is as follows: 1) by rice straw in 350-450 DEG C of pyrolysis charring at rice straw biomass carbon, be crushed to 50-80 mesh；2) rice is broadcast
1-2 weeks plowed soils before kind, ploughed depth 10-25cm apply compound potassium sulfate fertilizer 25kg/ mus, N in compound potassium sulfate fertilizer:
P2O5:K2Then rice straw biomass carbon is imposed on upper soll layer by O=15:15:15, turning over keeps biomass carbon and soil abundant
Mix, amount of application by weight: 1 part of soil, 0.4-1.5 parts of straw biomass charcoal.This method is low in cost, without secondary dirt
Dye, can improve soil physico-chemical property, increase soil fertility, and increase field productivity.
Emphasis of the Heavy Metal Pollution Control as agricultural land soil reparation at present, excellent heavy metal are passivated class soil conditioner
Soil activation heavy metal amount can be not only significantly reduced, and long-term cropping content of beary metal can be reduced and guarantee food safety.Straw base
Soil conditioning product is mostly that corresponding straw charcoal (being partially stalk directly biology corruption) first is made in stalk to be subject to benefit again
With.There is the problems such as pollution weight, complex process (oxygen barrier or logical indifferent gas, fraction collection separation) in producing process, it is manufactured at
Product charcoal in soil remediation for having the following problems, first is that straw charcoal applies directly as product, there are light specific gravity
Easily with soil erosion, heavy metal stabilization efficiency is lower the deficiencies of；Two are formed into compatibility straw charcoal soil conditioning product, be mostly
After acquisition straw charcoal again and obtained by other components mixture, lack the optimization of technique coupling.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of baking-free type rice straw base soil conditionings
Agent, it is intended to resource utilization rice straw, by the compound preparation such as itself and quick lime, the plaster of paris, porous natural clay, reduce at
This, solves acidification, the problems such as underground is hollow caused by straw directly returning to field, and compounding component is utilized to obtain preferable soil weight
Metal passivation effect.
Another object of the present invention is to provide a kind of preparation method of baking-free type rice straw base soil conditioner, this hairs
It is bright to be compounded using hydrogen peroxide with quick lime, it forms oxidation and heating condition completes the surface treatment of stalk, absorbed water using the plaster of paris,
Quick lime meet water and air curing, clay from it is sticking the features such as realize the cured effect of natural air drying after material molding, nothing
Drying and roasting is needed to handle, method energy conservation and environmental protection three-waste free discharge.
Specific technical solution of the present invention is as follows:
A kind of baking-free type rice straw base soil conditioner provided by the invention, the raw material including following parts by weight:
5-40 parts of rice straw powders, 5-55 parts of hydrogen peroxide, 5-15 parts of calcium lime powders, 5-15 parts of gessoes, 30-50 parts of days
Right adobe, 30-60 parts of deionized waters.
The rice straw powder, by the rice straw Integral-crushing gained dried after gathering in, granularity is 80-100 mesh, is contained
Water rate < 12% is conducive to the surface treatment of hydrogen peroxide under the granularity, and is conducive to the subsequent forming of soil conditioner, is soil conditioning
One of main side of agent, the component in actual use can be by edaphons using corruption, battalion needed for providing planting plants
Support substance.
The hydrogen peroxide, mass concentration 3-30%, hydrogen peroxide effectively can carry out oxygen to stalk surface under the concentration
Change processing, increases surface functional group such as carboxyl, aldehyde radical isodensity, conducive to its absorption and stabilisation to heavy metal.
The calcium lime powder, i.e. CaO are for heat needed for providing stalk pretreatment, and quick lime CaO meets water can shape
At white lime Ca (OH)2, a large amount of heat is released, softening and the dioxygen water treatment efficiency of stalk fibre are promoted.And it is formed ripe
Lime is placed in air after extrusion can slowly act on the calcium carbonate for forming some strength with air, improve the intensity of molding mass,
Soil pH can be effectively improved by being applied in soil, be sustained Ca ion, played the effect of heavy metal passivation, be the main side of soil conditioner
One of.
The gesso, i.e. CaSO4·0.5H2The excessive moisture of material after molding can be then transformed into the crystallization water by O
Become CaSO4·2H2O, and can be promoted molding after the strength of materials, heavy metal can effectively be adsorbed by being applied in soil, and be sustained Ca from
Son inhibits the absorption of plant pair soil activation heavy metal to achieve the effect that improvement, is one of main side of soil conditioner.
The natural porous clay, is selected from one of diatomite, sepiolite, attapulgite or a variety of, and granularity is
100-200 mesh, which is conducive to the subsequent forming of soil conditioner, and adobe has preferable pore canal system, and providing can
The cation of exchange can effectively adjust soil pH, absorption heavy metal, inhibit the migration of heavy metal Cd and reduce plant absorption wind
Danger is one of the main side of soil conditioner.
A kind of preparation method of baking-free type rice straw base soil conditioner provided by the invention, comprising the following steps:
1) mixing stirs: according to formula ratio by rice straw powder, hydrogen peroxide, calcium lime powder, being mixed, adds raw stone
Cream powder, natural porous clay, deionized water are mixed, obtain wet pug；
2) pugging: by wet pug made from step 1), being put into normal pressure pugging in pug mill, enters back into vacuum pugging and practices
Mud；
3) extruded moulding；
4) finished product is air-dried.
In step 1), rice straw powder, hydrogen peroxide, calcium lime powder be mixed time be 1~4h, using hydrogen peroxide with
Quick lime compounding, forms oxidation and heating condition completes the surface treatment of stalk；Gypsum powder is added, natural porous clay, goes
After ionized water, continue 0.5~2h of stirring, meets water and air curing, clay from sticking etc. using plaster of paris water suction, quick lime
Feature is to help subsequent pugging, molding and air-dries.
In step 2), the pugging step specifically: pugging under the conditions of normal pressure pugging 1-2h, 0.07~0.09Mpa of vacuum
0.5-1h.The step be mainly used for remove mixture in moisture, adsorbed gas, enhance the plasticity and compactness of pug, be conducive to
Subsequent extrusion obtains the column of higher-strength.
Extruded moulding step described in step 3) specifically: by the pug after step 2) pugging in horizontal screw extruder
Particle is made in middle extrusion.Graininess is made, can reduce and be lost with water flow by cohering for clay, lime, gypsum and stalk
Risk, even and if being crushed after forming and nor affecting on the admixture of clay, lime, gypsum and stalk.
Further, the particle is cylindrical particle, and column diameter is 2-6mm.The cylindrical particle forms more convenient, heap
It is more prone to produce hole after folded, the porosity of soil can be increased after application, the hardened degree of soil is reduced, increase the saturating of soil
Gas, and be not easy to be lost with water flow.
Finished product step is air-dried described in step 4) specifically: the material of extrusion is laid in charging tray, layer thickness about 20
~30mm in humidity 30-50RH%, 15-28 DEG C of temperature, has the 48-72h that dries in the air under wind or calm condition up to conditioner finished product.It should
The removal that environment is conducive to residual moisture is air-dried, more dry soil conditioner finished product is obtained；And dried in the air the phase processed by longer, promote
It is reacted into lime in component, gypsum and air carbon dioxide, water etc., to promote the intensity of conditioner.
Compared with prior art, baking-free type rice straw base soil conditioner provided by the invention and preparation method thereof, tool
Standby following advantages:
1) baking-free type rice straw base soil conditioner select straw powder, quick lime, the plaster of paris, natural porous clay this
A little raw materials are cheap and easy to get, and amount can be processed greatly, can meet the needs of largely returning field resource utilization.
2) it in baking-free type rice straw base soil conditioner preparation method, is compounded using hydrogen peroxide with quick lime, forms oxygen
Change and heating condition complete the surface treatment of stalk, meet water using plaster of paris water suction, quick lime and air curing, clay are had by oneself and glued
Property the features such as realize material molding after the cured effect of natural air drying, without drying and roasting handle, method energy conservation and environmental protection is without three
Useless discharge.
3) adsorbable heavy metal after the straw powder processing that baking-free type rice straw base soil conditioner is selected, and can be by micro- life
Object is metabolized as microbial reproduction and provides nutrient, and quick lime, the plaster of paris, glutinous earthen materia then can significantly strengthen the blunt of heavy metal
Change and inhibit heavy metal transformation, these components are uniformly mixed and are integrally formed with stalk, utilize compounding clay, quick lime, ripe stone
The own acid-base accommodation function such as cream, stalk return all kinds of problems caused by field and can be solved.
Compared with prior art, the present invention is based on the resource utilizations of rice straw, develop baking-free type rice straw base
Soil conditioner, proposes feasible and effective preparation method, also adapts to agricultural land soil and administers especially rice farmland soil heavy metals
The great market demand administered and repaired, can get fabulous Social benefit and economic benefit.
Specific embodiment
The following describes the present invention in detail with reference to examples.
Stalk used in the following embodiments of the present invention and comparative example, from City of Wuhu in Anhui somewhere, moisture content is
8%, it is stand-by that it is crushed to 100 mesh respectively.
Cd contaminated soil used in the following embodiments of the present invention and comparative example, from Anhui city, Cd full dose is 0.96mg/
Kg, active Cd leaching content are 0.37mg/kg (calcium chloride extraction).
Embodiment 1
A kind of preparation method of baking-free type rice straw base soil conditioner comprising the steps of:
1) mixing stirs: by weight, weighing 30kg rice straw powder, 3% hydrogen peroxide of 45kg, 10kg calcium lime powder, mixes
Stirring 2h is closed, 8kg gesso, 10kg 100-200 mesh attapulgite, 30kg100-200 mesh diatomite, 30kg is added and goes
Ionized water is mixed 0.5h, obtains wet pug；
2) pugging: by wet pug made from step 1), being put into normal pressure pugging in pug mill, enters back into vacuum pugging and practices
Mud, pugging 0.5h under the conditions of normal pressure pugging 1h, vacuum 0.09Mpa；
3) extruded moulding: the pug after mud squeezes out in horizontal screw extruder is made cylindrical particle, and column diameter is
3mm；
4) air-dry finished product: the material of extrusion is laid in charging tray, 20~30mm of layer thickness, in humidity 30-50RH%, temperature
15-28 DEG C of degree has the 48h that dries in the air under wind or calm condition up to conditioner finished product.
Baking-free type rice straw base soil conditioner made from the present embodiment tests its Cd inactivating performance: through Anhui Cd dirt
The Rice Cropping potted plant experiment for contaminating agricultural land soil confirms, applies the composite conditioner 0.188% (300kg/ mus equivalent), in soil
Cadmium rate 69% ± 3%, rate of growth 9% ± 1% drop in effective Cd range of decrease 45% ± 2% (calcium chloride extraction), rice grain.
Embodiment 2
A kind of preparation method of baking-free type rice straw base soil conditioner comprising the steps of:
1) mixing stirs: by weight, weighing 20kg rice straw powder, 3% hydrogen peroxide of 35kg, 15kg calcium lime powder, mixes
Stirring 2h is closed, 5kg gesso, 20kg attapulgite, 20kg 100-200 mesh diatomite, 10kg 100-200 mesh sea are added
Afrodite, 35kg deionized water are mixed 0.5h, obtain wet pug；
2) pugging: by wet pug made from step 1), being put into normal pressure pugging in pug mill, enters back into vacuum pugging and practices
Mud, pugging 0.5h under the conditions of normal pressure pugging 1h, vacuum 0.09Mpa；
3) extruded moulding: the pug after mud squeezes out in horizontal screw extruder is made cylindrical particle, and column diameter is
3mm；
4) air-dry finished product: the material of extrusion is laid in charging tray, layer thickness about 20~30mm, in humidity 30-50RH%,
15-28 DEG C of temperature has the 72h that dries in the air under wind or calm condition up to conditioner finished product.
Baking-free type rice straw base soil conditioner made from the present embodiment tests its Cd inactivating performance: through Anhui Cd dirt
The Rice Cropping potted plant experiment for contaminating agricultural land soil confirms, applies the composite conditioner 0.188% (300kg/ mus equivalent), in soil
Cadmium rate 73% ± 3%, rate of growth 6% ± 2% drop in effective Cd range of decrease 55% ± 2% (calcium chloride extraction), rice grain.
Comparative example 1
A kind of preparation method of soil conditioner comprising the steps of:
1) mixing stirs: by weight, weighing 30kg rice straw powder, 3% hydrogen peroxide of 45kg, 10kg calcium lime powder, mixes
Stirring 2h is closed, wet pug is obtained；
2) pugging: by wet pug made from step 1), being put into normal pressure pugging in pug mill, enters back into vacuum pugging and practices
Mud, pugging 0.5h under the conditions of normal pressure pugging 1h, vacuum 0.09Mpa；
3) extruded moulding: the pug after mud squeezes out in horizontal screw extruder is made cylindrical particle, and column diameter is
3mm；
4) air-dry finished product: the material of extrusion is laid in charging tray, layer thickness about 20~30mm, in humidity 30-50RH%,
15-28 DEG C of temperature has the 48h that dries in the air under wind or calm condition up to conditioner finished product.
Soil conditioner made from this comparative example tests its Cd inactivating performance: the rice through Anhui Cd polluted farmland soil
Planting pot it is experimentally confirmed that apply the composite conditioner 0.188% (300kg/ mu equivalent), the effective Cd range of decrease 25% in soil ±
Cadmium rate 32% ± 3%, rate of growth 1% ± 2% drop in 2% (calcium chloride extraction), rice grain.
Comparative example 2
A kind of preparation method of soil conditioner comprising the steps of:
1) mixing stirs: by weight, weighing 20kg rice straw powder, 5kg gesso, 50kg diatomite (100-200
Mesh), 55kg deionized water, be mixed 0.5h, obtain wet pug；
2) pugging: by wet pug made from step 1), being put into normal pressure pugging in pug mill, enters back into vacuum pugging and practices
Mud, pugging 0.5h under the conditions of normal pressure pugging 1h, vacuum 0.09Mpa；
3) extruded moulding: the pug after mud squeezes out in horizontal screw extruder is made cylindrical particle, and column diameter is
3mm；
4) air-dry finished product: the material of extrusion is laid in charging tray, layer thickness about 20~30mm, in humidity 30-50RH%,
15-28 DEG C of temperature has the 72h that dries in the air under wind or calm condition up to conditioner finished product.
Soil conditioner made from this comparative example tests its Cd inactivating performance: the rice through Anhui Cd polluted farmland soil
Planting pot it is experimentally confirmed that apply the composite conditioner 0.188% (300kg/ mu equivalent), the effective Cd range of decrease 33% in soil ±
Cadmium rate 40% ± 3%, rate of growth 2% ± 1% drop in 2% (calcium chloride extraction), rice grain.
It is above-mentioned to be retouched in detail referring to what a kind of preparation method of the embodiment to baking-free type rice straw base soil conditioner carried out
It states, is illustrative without being restrictive, several embodiments can be enumerated according to limited range, therefore do not departing from this
Change and modification under invention general plotting should belong within protection scope of the present invention.
Claims (10)
1. a kind of baking-free type rice straw base soil conditioner, which is characterized in that the baking-free type rice straw base soil conditioning
Agent includes the raw material of following parts by weight: 5-40 parts of rice straw powders, 5-55 parts of hydrogen peroxide, 5-15 parts of calcium lime powders, 5-15 parts it is ripe
Land plaster, 30-50 parts of natural porous clays, 30-60 parts of deionized waters.
2. baking-free type rice straw base soil conditioner according to claim 1, which is characterized in that the rice straw powder
By the rice straw Integral-crushing gained dried after gathering in, granularity is 80-100 mesh, moisture content < 12%.
3. baking-free type rice straw base soil conditioner according to claim 1, which is characterized in that the matter of the hydrogen peroxide
Measuring concentration is 3~30%.
4. baking-free type rice straw base soil conditioner according to claim 1 to 3, which is characterized in that described
Natural porous clay is selected from one of diatomite, sepiolite, attapulgite or a variety of, and granularity is 100-200 mesh.
5. the preparation method of baking-free type rice straw base soil conditioner according to any one of claims 1-4, special
Sign is that the preparation method comprises the following steps:
1) mixing stirs: according to formula ratio by rice straw powder, hydrogen peroxide, calcium lime powder, being mixed, adds the plaster of paris
Powder, natural porous clay, deionized water are mixed, obtain wet pug；
2) pugging: by wet pug made from step 1), it is put into normal pressure pugging in pug mill, enters back into pugging in vacuum pugging；
3) extruded moulding；
4) finished product is air-dried.
6. preparation method according to claim 5, which is characterized in that in step 1), rice straw powder, hydrogen peroxide, raw stone
The time that ashes is mixed is 1~4h, gypsum powder, natural porous clay is added, after deionized water, continue stirring 0.5~
2h。
7. preparation method according to claim 5, which is characterized in that in step 2), the pugging step specifically: normal pressure
Pugging 0.5-1h under the conditions of pugging 1-2h, 0.07~0.09Mpa of vacuum.
8. preparation method according to claim 5, which is characterized in that extruded moulding step described in step 3) specifically:
Pug after step 2) pugging is squeezed out in horizontal screw extruder, particle is made.
9. preparation method according to claim 8, which is characterized in that the particle is cylindrical particle, and column diameter is 2-
6mm。
10. preparation method according to claim 5, which is characterized in that air-dry finished product step described in step 4) specifically:
The material of extrusion is laid in charging tray, 20~30mm of layer thickness, in humidity 30-50RH%, 15-28 DEG C of temperature, have wind or
48-72h is dried in the air under calm condition up to conditioner finished product.
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| CN113020247A (en) * | 2021-04-21 | 2021-06-25 | 四川省地质调查院 | Granulating process of contaminated soil remediation conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113020247A (en) * | 2021-04-21 | 2021-06-25 | 四川省地质调查院 | Granulating process of contaminated soil remediation conditioner |
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