CN102826926A - Molybdenum tailings acid soil conditioner and production process thereof - Google Patents
Molybdenum tailings acid soil conditioner and production process thereof Download PDFInfo
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Abstract
The invention discloses a molybdenum tailings acid soil conditioner and a production process for the molybdenum tailings acid soil conditioner. The molybdenum tailings acid soil conditioner comprises clinkers and dispersing agents, the clinkers use molybdenum tailings, dolomites and anthracite to serve as raw materials, activated clinkers are obtained through inspection, grinding, material mixing, burning at the temperature of 1150-1350 DEG C and activating, and then the dispersing agents are added to be smashed to be the acid soil conditioner. The molybdenum tailings acid soil conditioner can efficiently, stably and enduringly improve acid soil, simultaneously provides microelement mineral nutrition for weak acid soil, and has advantages of low energy consumption, low cost and low price and the like, wherein the microelement mineral nutrition can be absorbed by crops in balance and are not easy to run off. The production process for the molybdenum tailings acid soil conditioner can sufficiently use valuable resources in molybdenum tailings, achieves decrement discharge of the tailings, lowers environment stress and reduces potential safety hazards.
Description
Technical field
The present invention relates to a kind of soil improvement preparation and preparation method thereof, be specifically related to a kind of acidic soil conditioner and production technique made from molybdenum mine tailing and rhombspar thereof.
Background technology
Acid soil refers to that the pH value at the soil below 7, comprises great soil groups such as latosol, red earth, red soil, yellow earth and dry red soil.This type soil is except the obstacle of the H+ in the soil to growth and development of plants, and also loss and the validity with the manganese poisoning under aluminium toxicity, the waterflooding condition, plant nutrient reduces the particularly obstacles such as disappearance of middle trace element.The used soil conditioner of existing improvement acid soil is divided into two big types: lime class and alkaline industrial residue.Though the former have very strong in and function, if but excessive or use inequality, can cause local calcification, the damage soil microorganisms, influence Soil structure and can not satisfy the demand of crop centering trace element fertilizer simultaneously; Among the latter and insufficiency of function, though trace element usually has heavy metal and to the deleterious impurity of soil fertility in supplying simultaneously, the single soil nutrient balance that influences of middle micro-kind.
Use chemical fertilizer and crop yield to increase substantially merely in large quantities; Make arable soil generally lack in micro-mineral nutrition, acid soil mainly lacks calcium, magnesium, silicon, trace element in molybdenum, the zinc etc.; Mostly trace element fertilizer is the water-soluble products that chemical process is produced in existing; Cost an arm and a leg, be prone to run off, can not solve the soil disappearance lastingly, and be the vitriol preparation mostly, sulfate radical residual after the nutrition absorption can aggravate soil acidification.China south acid soil distributes very wide, greatly about 5,000 ten thousand hectares, presses for improved effect with efficient stable, simultaneously again can general equilibrium ground supplies with the new soil amendment of the middle micro-mineral nutrition that acid soil lacks.
Mine tailing is that large industry is useless admittedly, and the hidden danger that not only influence is ecological, contaminate environment causes mud-stone flow disaster in addition is the significant threat of environmental protection and safety, also is huge resource wealth simultaneously.But the mine tailing resource technology of practical application at present is to fill out roadbed, manufacturing brick and tile and architectural pottery class basically; There is two large problems: the one, institute's alternate is that the sandstone class is worth very low resource; To the molybdenum mine tailing contain like this kind complete, farm crop are worth the mine tailing of very high middle trace element, (with the residual molybdenum of ore dressing is example, and a medium-sized dressing-works of producing the 2000t concentrated molybdenum ore per year produces 1,000,000 tons of mine tailings at least to be difficult to embody resource value; Best level mine tailing by domestic ore dressing contains the residual at least 100t molybdenum amount of molybdenum amount 0.01% calculating; The little fertilizer of molybdenum amount (150t) such as chemical industry output are worth 3,000 ten thousand yuan, and cost needs to also have iron, copper, zinc, manganese, potassium more than 2,000 ten thousand yuan; Silicon etc.), can't embody its value as the sandstone utilization at all; The 2nd, because the such use of communications and transportation cost and cause for quality mine tailing also can't be accepted by market, real utilization seldom, and is little to mine tailing minimizing effect.
Domestic having with the technology proposition of molybdenum mine tailing activation as the fertile filler of compound and the soil conditioner of the sand-fixation, water-keeping function of preparation prone soil, but be not suitable for the improvement of acid soil and the functional requirement that middle trace element replenishes.
Silicate in the crustal rock is the main source of the mineral nutrition of plant; But occurring in nature slowly cool off the silicate crystal that forms by magma can not be directly by the plant absorbing utilization; Need to become microcrystal or noncrystal through very long geochronic weathering soil-forming process; Just have the absorbed activity of ability, the essence of micro-mineral nutrition was to lack to have active mineral nutrient element during soil lacked.It is noncrystal or microcrystal that made silicate minerals also needs activation, could as in trace element fertilizer supply with crop utilization, so need the technological measure of fast activating in the manufacturing processed, make it become water-soluble or solubility in citric acid (weak acid dissolubility) state.Activation has the chemical activation of adding material (acvator) and molten state silicate cold quenching is blocked two kinds of methods of crystallization.
Summary of the invention
For overcoming the defective of prior art; The object of the present invention is to provide a kind of molybdenum mine tailing acidic soil conditioner; The acidic soil conditioner that utilizes the molybdenum mine tailing to process for main raw material; Can be efficiently, stable, improve acid soil enduringly, contain in slightly acidic soil and can balancedly be absorbed, be difficult for the middle micro-mineral nutrition that runs off, and have advantages such as less energy-consumption, low cost, low price by crop.
Another object of the present invention is to provide a kind of working method of molybdenum mine tailing acidic soil conditioner, make full use of the useless admittedly resource of molybdenum mine tailing, realize the mine tailing minimizing, reduce environmental stress and potential safety hazard.
The technical scheme that is adopted for the present invention of realization above-mentioned purpose is following:
A kind of molybdenum mine tailing acidic soil conditioner, it comprises grog and dispersion agent, said grog is to use molybdenum mine tailing, rhombspar, hard coal to form as feedstock production; Each constituent mass fractional summation is 100% in the raw material; Allocate anthracitic massfraction a=10-15% into; The massfraction that molybdenum mine tailing and rhombspar are allocated into is to be n=1.2-1.4 through control raw material neutral and alkali oxide compound and acidic oxide mol ratio, allocates into according to following formula calculating:
Molybdenum mine tailing massfraction=1 ÷ (1+ α) * (100-a) %; α=n ︱ ∑ wherein
Alkalescence 1-∑
Acid 1︱ ÷ ︱ ∑
Alkalescence 2-∑
Acid 2︱, ∑
Alkalescence 1Be molybdenum mine tailing neutral and alkali terms of oxide moles summation, ∑
Acid 1Mole number summation for acidic oxide in the molybdenum mine tailing; ∑
Alkalescence 2Be rhombspar neutral and alkali terms of oxide moles summation, ∑
Acid 2The mole number summation of acidic oxide in the rhombspar;
The quality of said dispersion agent is the 5-15% of raw material total mass.
Among the present invention, confirming of the hard coal amount of allocating into is to calculate according to raw material neutral and alkali oxide compound and acidic oxide mol ratio, the anthracitic calorific value that is adopted and basic oxide and the pairing melt temperature of acidic oxide mol ratio and the mark coal amount of allocating into empirical value;
Calculation formula is following:
Calculation formula between mark coal amount of allocating into (massfraction %) and the n is y=-11n+23, and y representes to mark the amount of allocating into of coal, and n is basic oxide and acidic oxide mol ratio;
The anthracitic massfraction %=standard coal equivalent calorific value Q that allocates into
Mark÷ hard coal calorific value Q
Do not have* mark coal the amount of allocating into.
In the preferred scheme; Molybdenum mine tailing acidic soil conditioner comprises grog; Said grog is to use molybdenum mine tailing, rhombspar, hard coal to form as feedstock production; Wherein the consumption of each component is respectively molybdenum mine tailing 28-32% by percentage to the quality, rhombspar 50-61%, hard coal 11-13%, and the massfraction sum of three kinds of components is 100%.Preferably, molybdenum mine tailing acidic soil conditioner according to the invention also comprises mineralizer, and the quality of mineralizer is the 0.5-1.5% of clinker quality.The mineralizer effect is that adjustment iron aluminum ratio reduces energy consumption to reaction, the reduction melt temperature that 5:1-10:1 quickens other compositions; Red oxide of iron in raw material/aluminium sesquioxide ratio >=1: 10 then needn't add mineralizer, on the contrary then add the red stone mineral and make it to reach 1: 10 ~ 1:5 between.Mineralizer can be to add red stone also can add alkali-metal material or fluorite etc.
Molybdenum mine tailing acidic soil conditioner according to the invention also is included in when the soil conditioner grog is pulverized and adds dispersion agent, and the quality of dispersion agent is the 5-15% of clinker quality.The purpose of dispersion agent is to prevent that Calucium Silicate powder from absorbing water to solidify in soil, avoids reducing fertilizer efficiency and to the disadvantageous effect of root growth, its action principle is a blocking-up hydrosilicate interionic chemical bond, destroys congealed solid and forms.
Preferably, dispersion agent of the present invention is a 300-400 purpose superfine powder, is selected from one or more mixing in fertilizer, mud, peat, the crop material etc.
The molybdenum mine tailing mainly contains silicon-dioxide, aluminium sesquioxide, red oxide of iron, quicklime, Natural manganese dioxide, sodium oxide, potassium oxide; Mainly contain quicklime, Natural manganese dioxide in the rhombspar; And grog totally is alkaline; Be needs on the proportioning of molybdenum mine tailing and rhombspar, adopt the ratio of basic oxide: acidic oxide=1: 1.2-1.4 (mol ratio) to calculate proportioning according to soil conditioner improvement acid soil; Wherein amphoteric iron, aluminium sesquioxide show acid in the strong basicity fused solution, in resultant, become acid group equally with silicon-dioxide, calculate as acidic oxide during calculating.
A kind of preparation method of molybdenum mine tailing acidic soil conditioner, it may further comprise the steps:
1) detect: the content according to GB/T23349-2009 detects heavy metal in the molybdenum mine tailing, adopt the molybdenum mine tailing that meets the GB/T23349-2009 prescribed limits;
2) grind granulation: with rhombspar, detect qualified molybdenum mine tailing and hard coal is dried respectively and in grinding in ball grinder; After crossing 200 mesh sieves respectively; Calculate the amount of allocating into of component in the raw material according to the formula of claim 1; Molybdenum mine tailing, ground dolomite, pulverized anthracite after will grinding according to formula ratio mix, and humidification causes the 5-10mm particle;
3) calcining: above-mentioned particle is transferred in the mechanical vertical kiln in 1150-1350 ℃ of temperature lower calcination, at the shaft kiln section of burning till residence time 20-40 minute;
4) activation: in the decline process, the cold, high pressure air cooling activation by the kiln bottom blasts obtains the activation grog to the fusion grog in shaft kiln;
5) modification: grog is pulverized with kibbler, adds the dispersion agent thorough mixing, promptly obtains the acidic soil conditioner product.
Preferably, step 2) in, adding accounts for the mineralizer of mixing raw material weight 0.5-1.5% and mixes in mixing raw material, calcines afterwards again.
Preferably, in the step 4) of the present invention, the fineness of pulverizing back soil conditioner powder is the 80-100 order.
The preparation of molybdenum mine tailing acidic soil conditioner of the present invention adopts calcined by rotary kiln also can accomplish same task; Use molybdenum mine tailing and rhombspar to be raw material; According to basic oxide and acidic oxide mol ratio 1:1.2-1.4; Grinding becomes molybdenum mine tailing soil conditioner product after corresponding 1150-1350 ℃ of melt temperature calcining is produced the soil conditioner grog, added dispersion agent, and the difference of its technological process is:
1) do not allocate hard coal in the raw material into, spray into combustion gas or coal dust (and combustion gas+coal dust) reaches the fused calcining temperature by rotary kiln end;
2) compound can directly add rotary kiln, also can add after the humidification granulation, decides according to the configuration of the attached apparatus for feeding of rotary kiln;
3) priming reaction adopts shrend, promptly at kiln tail configuration flushometer the melting charge chilling is being moved to following one solid-liquid separation process simultaneously, adds dispersion agent after the oven dry and is crushed into molybdenum mine tailing soil conditioner product.
Compare prior art; Beneficial effect of the present invention is: molybdenum mine tailing acidic soil conditioner of the present invention can be efficiently, stable, improve acid soil enduringly; Can provide simultaneously balancedly to be absorbed, to be difficult for the middle micro-mineral nutrition that runs off, and have advantages such as less energy-consumption, low cost, low price by crop.Molybdenum mine tailing acidic soil conditioner production technique of the present invention makes full use of the useless admittedly resource of molybdenum mine tailing, realizes the purpose of mine tailing minimizing, reduction environmental stress and potential safety hazard.
Below in conjunction with accompanying drawing and concrete embodiment the present invention is done further explain.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
It below is the preferred embodiment of the invention.
Embodiment 1
A kind of molybdenum mine tailing acidic soil conditioner comprises grog, and said grog is to use molybdenum mine tailing, rhombspar, hard coal to form as feedstock production, and the molybdenum ore mine tailing of selecting for use, rhombspar and hard coal raw material meet the molybdenum mine tailing of GB/T23349-2009 regulation; The composition and the calculation result that detect in the raw material are seen table 1:
Table 1: proportioning raw materials reckoner
Wherein basic oxide and acidic oxide mol ratio are confirmed as n=1.3; The consumption that calculates each component is respectively molybdenum mine tailing 32% by percentage to the quality; Rhombspar 57%, hard coal 11%, the molecule in the anthracitic massfraction of allocating into that wherein calculates is according to the round number; According to following steps production:
Raw material is dried respectively and in grinding in ball grinder; After crossing 200 mesh sieves respectively, molybdenum mine tailing, ground dolomite, pulverized anthracite after will grinding according to formula ratio mix, and it is the 5-10mm particle that humidification causes particle diameter; Particle is transferred in the mechanical vertical kiln; In 1200 ℃ of calcinings down, stopped 20 minutes in the section of burning till, control grog downstream rate is 3m/h; The fusion grog is in shaft kiln in the decline process; Cold, high pressure air cooling activation by the kiln bottom blasts obtains the activation grog, adds the dispersion agent that accounts for mixing raw material weight 10% in the activation grog; Be crushed to 80 mesh sieve all-pass mistakes with kibbler again after mixing, promptly obtain acidic soil conditioner.
Embodiment 2
A kind of molybdenum mine tailing acidic soil conditioner comprises grog; Said grog is to use molybdenum mine tailing, rhombspar, hard coal to form as feedstock production; The molybdenum ore mine tailing of selecting for use, rhombspar and hard coal raw material meet the molybdenum mine tailing of GB/T23349-2009 regulation; Wherein, contain quicklime 31%, Natural manganese dioxide 20% in the rhombspar; Contain silicon-dioxide 73.3%, aluminium sesquioxide 10.95%, red oxide of iron 1.54%, quicklime 0.64%, Natural manganese dioxide 0.42%, sodium oxide 1.65%, potassium oxide 3.40% in the molybdenum mine tailing; 5200 kilocalories/kg of anthracitic calorific value, aluminium sesquioxide 4.08%; Calculate the consumption of each component by basic oxide and acidic oxide mol ratio n=1.4 proportioning; Molecule in the anthracitic massfraction of allocating into that wherein calculates is according to the round number; Be respectively molybdenum mine tailing 31% by percentage to the quality; Rhombspar 59%, hard coal 10%, and according to following steps production:
With rhombspar and detect that qualified molybdenum mine tailing is dried respectively and in grinding machine for grinding; After crossing 200 mesh sieves respectively; Molybdenum mine tailing, ground dolomite, pulverized anthracite after will grinding according to formula ratio mix, and it is the 5-10mm particle that humidification causes particle diameter, and particle is transferred in the mechanical vertical kiln; In 1150 ℃ of temperature lower calcinations, stopped 30 minutes in the section of burning till, control grog downstream rate is 2m/h; The fusion grog is in shaft kiln in the decline process; Cold, high pressure air cooling activation by the kiln bottom blasts obtains the activation grog, adds the dispersion agent that accounts for mixing raw material weight 5% in the activation grog; Be crushed to 80 mesh sieve all-pass mistakes with kibbler again after mixing, promptly obtain acidic soil conditioner.
Embodiment 3
A kind of molybdenum mine tailing acidic soil conditioner comprises grog; Said grog is to use molybdenum mine tailing, rhombspar, hard coal to form as feedstock production; The molybdenum ore mine tailing of selecting for use, rhombspar and hard coal raw material meet the molybdenum mine tailing of GB/T23349-2009 regulation; Wherein, contain quicklime 31%, Natural manganese dioxide 20% in the rhombspar; Contain silicon-dioxide 73.3%, aluminium sesquioxide 10.95%, red oxide of iron 1.54%, quicklime 0.64%, Natural manganese dioxide 0.42%, sodium oxide 1.65%, potassium oxide 3.40% in the molybdenum mine tailing; 5600 kilocalories/kg of anthracitic calorific value, aluminium sesquioxide 4.08%;
Calculate the consumption of each component by basic oxide and acidic oxide mol ratio n=1.2 proportioning; Molecule in the anthracitic massfraction of allocating into that wherein calculates is according to the round number; Be respectively molybdenum mine tailing 33.5% by percentage to the quality, rhombspar 54.5%, hard coal 12%; And according to following steps production:
Raw material is dried respectively and in grinding in ball grinder; After crossing 200 mesh sieves respectively, molybdenum mine tailing, ground dolomite, pulverized anthracite after will grinding according to formula ratio mix, and it is the 5-10mm particle that humidification causes particle diameter; Particle is transferred in the mechanical vertical kiln; In 1350 ℃ of calcinings down, stopped 30 minutes in the section of burning till, control grog downstream rate is 2m/h; The fusion grog is in shaft kiln in the decline process; Cold, high pressure air cooling activation by the kiln bottom blasts obtains the activation grog, adds the dispersion agent that accounts for mixing raw material weight 10% in the activation grog; Be crushed to 100 mesh sieve all-pass mistakes with kibbler again after mixing, promptly obtain acidic soil conditioner.
Embodiment 4
A kind of molybdenum mine tailing acidic soil conditioner comprises grog; Said grog is to use molybdenum mine tailing, rhombspar, hard coal to form as feedstock production; The molybdenum ore mine tailing of selecting for use, rhombspar and hard coal raw material meet the molybdenum mine tailing of GB/T23349-2009 regulation; Wherein, contain quicklime 31%, Natural manganese dioxide 20% in the rhombspar; Contain silicon-dioxide 73.3%, aluminium sesquioxide 10.95%, red oxide of iron 0.54%, quicklime 0.64%, Natural manganese dioxide 0.42%, sodium oxide 1.65%, potassium oxide 3.40% in the molybdenum mine tailing; 5600 kilocalories/kg of anthracitic calorific value, aluminium sesquioxide 4.08%; Calculate the consumption of each component by basic oxide and acidic oxide mol ratio n=1.3 proportioning, be respectively molybdenum mine tailing 32.6% by percentage to the quality, rhombspar 55.4%, hard coal 12%; According to following steps production:
Raw material is dried respectively and in grinding in ball grinder, cross 200 mesh sieves respectively after, molybdenum mine tailing, ground dolomite, pulverized anthracite after will grinding according to formula ratio mix; Mixed raw material is transferred in the mechanical vertical kiln, adds the red stone mineralising agent that accounts for mixing raw material weight 1%, and it is the 5-10mm particle that the back that stirs, humidification cause particle diameter; Particle is transferred in the mechanical vertical kiln; In 1200 ℃ of temperature lower calcinations, stopped 40 minutes in the section of burning till, control grog downstream rate is 1.5m/h; The fusion grog is in shaft kiln in the decline process; Cold, high pressure air cooling activation by the kiln bottom blasts obtains the activation grog, adds the dispersion agent that accounts for mixing raw material weight 5% in the activation grog; Be crushed to 80 mesh sieve all-pass mistakes with kibbler again after mixing, promptly obtain acidic soil conditioner.
Embodiment 5
A kind of molybdenum mine tailing acidic soil conditioner comprises grog; Said grog is to use molybdenum mine tailing, rhombspar, hard coal to form as feedstock production; The molybdenum ore mine tailing of selecting for use, rhombspar and hard coal raw material meet the molybdenum mine tailing of GB/T23349-2009 regulation; Wherein, contain quicklime 31%, Natural manganese dioxide 20% in the rhombspar; Contain silicon-dioxide 73.3%, aluminium sesquioxide 10.95%, red oxide of iron 0.54%, quicklime 0.64%, Natural manganese dioxide 0.42%, sodium oxide 1.65%, potassium oxide 3.40% in the molybdenum mine tailing; 5200 kilocalories/kg of anthracitic calorific value, aluminium sesquioxide 4.08%; Calculate the consumption of each component by basic oxide and acidic oxide mol ratio n=1.3 proportioning, consumption is respectively molybdenum mine tailing 32.2% by percentage to the quality, rhombspar 54.8%, hard coal 13%; According to following steps production:
Raw material is dried respectively and in grinding in ball grinder; After crossing 200 mesh sieves respectively; Molybdenum mine tailing after will grinding according to formula ratio, ground dolomite, pulverized anthracite mix, and add 1% Calcium Fluoride (Fluorspan) (fluorite) and mix as mineralizer, and it is the 5-10mm particle that humidification causes particle diameter; Particle is transferred in the mechanical vertical kiln, stops 40 minutes in the section of burning till in 1200 ℃ of temperature lower calcinations, and control grog downstream rate is 2m/h; The fusion grog is in shaft kiln in the decline process; Cold, high pressure air cooling activation by the kiln bottom blasts obtains the activation grog, adds the dispersion agent that accounts for mixing raw material weight 5% in the activation grog; Be crushed to 80 mesh sieve all-pass mistakes with kibbler again after mixing, promptly obtain acidic soil conditioner.
Application implementation example 1
1. molybdenum mine tailing soil conditioner improves the effect of acid soil pH value
Through the field plot trial of on acid red earth in Guangdong Province and rice soil, using molybdenum mine tailing soil conditioner in 2 years; Respectively handling the sub-district after experiment finishes gets topsoil (0-20cm) soil respectively and carries out the pH pH-value determination pH; Data are carried out variance analysis and F test, and the result sees table 2 and table 3.
Can find out from table 2 and table 3, along with molybdenum mine tailing soil conditioner amount of application increase, soil pH is the trend of continuous rising.On the basis of conventional fertilizer application contrast; Increase and execute the processing of molybdenum mine tailing soil conditioner; Acid red earth pH value has promoted 0.55-1.05 units; Acid rice soil pH value has improved 0.62-1.20 unit, handles differences and all reaches utmost point level of signification, shows that molybdenum mine tailing soil conditioner is very remarkable to improving acid soil pH effect.
The pH value of topsoil soils contrast (red earth) after table 2 off-test
Annotate: LSD
0.01=0.13, * * representes that difference reaches utmost point level of signification
The pH value of topsoil soils compares (rice soil) after table 3 off-test
Annotate: LSD
0.01=0.18, * * representes that difference is extremely remarkable.
2. molybdenum mine tailing soil conditioner is eliminated the effect of acid soil aluminium poison
After annual experiment is accomplished, take each slash soil sample of handling the sub-district, carry out the mensuration of content of soil exchangeable Al3+, the mensuration result of red earth and rice soil sees table 4.
The aluminum ions content of table 4 different treatment content of soil exchangeable
Can find out that from table 4 processing horizontal of different molybdenum mine tailing soil conditioners is with content of soil exchangeable Al
3+Content present the relation of negative correlation.The exchangeability aluminium content of 1 year slash soil presents downward trend gradually along with the increase of molybdenum mine tailing soil conditioner amount of application; After the off-test in 1 year, detected exchangeability aluminium, the adding of molybdenum mine tailing soil conditioner has been described, effectively eliminated in the acid soil aluminium Toxicity in Crops less than slash soil.In the production practice, can be through accurately measuring the potential of hydrogen of soil, combine the switching performance of soil to carry out the righttest amount of application definite of molybdenum mine tailing soil conditioner.
3. molybdenum mine tailing soil conditioner is to the influence of soil nutrient
After the off-test in 2 years, take respectively to handle the topsoil soils (0-20cm) of sub-district, measure the soil organism, full nitrogen, alkali-hydrolyzable nitrogen, available phosphorus, effective potassium, exchangeable calcium, magnesium and available silicon content, the analytical results of red earth and rice soil is listed in table 5,6.
Table 5: topsoil soils analytical results (red earth) after the off-test
Topsoil soils analytical results (rice soil) after table 6 off-test
Can find out from table 5 and table 6, on the basis of conventional fertilizer application, increase and execute molybdenum mine tailing soil conditioner that soil total N, alkaline hydrolysis N, effective P, effective K content all have raising in various degree, the amplitude that content of soil exchangeable Ca, Mg and effective Si promote is bigger.Explain that molybdenum mine tailing soil conditioner improving the soil tart simultaneously, has promoted the decomposition of the soil organism and the release of soil nutrient.Base cation and the essential nutritive elements such as silicon of paddy rice that molybdenum mine tailing soil conditioner provides acid soil to lack.But the contrast that the soil organism and total nitrogen content compare slightly descends, when molybdenum mine tailing soil conditioner is used in suggestion, in conjunction with straw-returning, green manuring or suitable supplementation administration fertilizer.
4, molybdenum mine tailing soil conditioner crop yield effect
Table 7 is the effect of molybdenum mine tailing soil conditioner of the present invention for the conduct raising the output, and the data in the table 7 can be found out, use molybdenum mine tailing soil conditioner of the present invention can improve the output of crop.
Table 7 field test crop yield in 2 years gathers
The comparative example 1
The soil conditioner that the molybdenum mine tailing is made and traditional slaked lime soil conditioner energy consumption are relatively
Rhombspar decomposes and belongs to thermo-negative reaction, and silicate synthesizes and belongs to thermopositive reaction, and the waste heat of thermopositive reaction is supplied with rhombspar and decomposed; The slaked lime soil conditioner of traditional improvement acid soil, manufacturing processed belongs to thermo-negative reaction fully.Therefore the silicate of production unit quality needs less heat than slaked lime, and by the tart function of improving the soil (divalent alkaline-earth metal mole number) relatively, energy consumption also reduces to some extent.The energy consumption that table 8 has been listed molybdenum mine tailing soil conditioner and slaked lime soil conditioner calcination process unit product and specific work equivalent energy compares.
Two kinds of soil conditioner calcinings of table 8 coal consumption relatively
If consider trace element fertilizer in the production, need the energy consumption of about as much, product possesses the energy consumption that two kinds of functions have only a kind of function, and energy-saving effect is very significant.
Claims (8)
1. a molybdenum mine tailing acidic soil conditioner is characterized in that it comprises grog and dispersion agent, and said grog is to use molybdenum mine tailing, rhombspar, hard coal to form as feedstock production; Each constituent mass fractional summation is 100% in the raw material; Allocate anthracitic massfraction a=10-15% into; The massfraction that molybdenum mine tailing and rhombspar are allocated into is to be n=1.2-1.4 through control raw material neutral and alkali oxide compound and acidic oxide mol ratio, allocates into according to following formula calculating:
Molybdenum mine tailing massfraction=1 ÷ (1+ α) * (100-a) %; α=n ︱ ∑ wherein
Alkalescence 1-∑
Acid 1︱ ÷ ︱ ∑
Alkalescence 2-∑
Acid 2︱, ∑
Alkalescence 1Be molybdenum mine tailing neutral and alkali terms of oxide moles summation, ∑
Acid 1Mole number summation for acidic oxide in the molybdenum mine tailing; ∑
Alkalescence 2Be rhombspar neutral and alkali terms of oxide moles summation, ∑
Acid 2The mole number summation of acidic oxide in the rhombspar;
The quality of said dispersion agent is the 5-15% of raw material total mass.
2. molybdenum mine tailing acidic soil conditioner according to claim 1; It is characterized in that: wherein the consumption of each component is respectively molybdenum mine tailing 28-32% by percentage to the quality; Rhombspar 50-61%, hard coal 11-13%, the massfraction sum of three kinds of components is 100%.
3. molybdenum mine tailing acidic soil conditioner according to claim 1 and 2, it is characterized in that: it also comprises mineralizer, the quality of mineralizer is the 0.5-1.5% of clinker quality.
4. molybdenum mine tailing acidic soil conditioner according to claim 1 and 2 is characterized in that: said dispersion agent is a 300-400 purpose superfine powder, is selected from one or more mixing in fertilizer, mud, brown coal, peat, the crop material.
5. the preparation method of a molybdenum mine tailing acidic soil conditioner as claimed in claim 1 is characterized in that it may further comprise the steps:
1) detect: the content according to GB/T23349-2009 detects heavy metal in the molybdenum mine tailing, adopt the molybdenum mine tailing that meets GB/T23349-2009 limit value regulation;
2) grind granulation: with rhombspar, detect qualified molybdenum mine tailing and hard coal is dried respectively and in grinding in ball grinder; After crossing 200 mesh sieves respectively; Calculate the amount of allocating into of component in the raw material according to the formula of claim 1; Molybdenum mine tailing, ground dolomite, pulverized anthracite after will grinding according to formula ratio mix, and humidification causes the 5-10mm particle;
3) calcining: above-mentioned particle is transferred in the mechanical vertical kiln in 1150-1350 ℃ of temperature lower calcination, at the shaft kiln section of burning till residence time 20-40 minute;
4) activation: in the decline process, the cold, high pressure air cooling activation by the kiln bottom blasts obtains the activation grog to the fusion grog in shaft kiln;
5) modification: grog is pulverized with kibbler, adds the dispersion agent thorough mixing, promptly obtains the acidic soil conditioner product.
6. the preparation method of molybdenum mine tailing acidic soil conditioner according to claim 5 is characterized in that: step 2) in, adding accounts for the mineralizer of mixing raw material weight 0.5-1.5% and mixes in mixing raw material, calcines afterwards again.
7. according to the preparation method of claim 5 or 6 described molybdenum mine tailing acidic soil conditioners, it is characterized in that: in the step 4), add accounting for the dispersion agent of mixing raw material weight 5-15%, and fully mix, after adding dispersion agent, pulverize again.
8. the preparation method of molybdenum mine tailing acidic soil conditioner according to claim 7 is characterized in that: in the step 4), the fineness of pulverizing back soil conditioner powder is the 80-100 order.
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