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CN102584389B - Method for preparing phosphorus-containing organic compound fertilizer - Google Patents

Method for preparing phosphorus-containing organic compound fertilizer Download PDF

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Publication number
CN102584389B
CN102584389B CN2012100120663A CN201210012066A CN102584389B CN 102584389 B CN102584389 B CN 102584389B CN 2012100120663 A CN2012100120663 A CN 2012100120663A CN 201210012066 A CN201210012066 A CN 201210012066A CN 102584389 B CN102584389 B CN 102584389B
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phosphorus
compound fertilizer
organic compound
grains
containing organic
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CN102584389A (en
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邱树毅
解田
王晓丹
袁颉
杨丽萍
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Guizhou University
Wengfu Group Co Ltd
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Wengfu Group Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

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Abstract

本发明公开了一种含磷有机复合肥的制备方法,包括酒糟的预处理、含磷有机复合肥的制备和造粒包装,具体包括以下步骤:(1)酒糟的预处理:酒糟与水混合均匀,接种烟曲霉种子培养液,生料发酵;(2)含磷有机复合肥的制备:经过预处理的酒糟25~65份,磷尾矿粉35~60份,水5~20份,接种黑曲霉种子培养液、巨大芽孢杆菌种子培养液、乳酸菌种子培养液、白腐真菌种子培养液中的一种以上,混匀,生料发酵;(3)将上述发酵好的有机复合肥造粒,包装。本发明将白酒工业的主要废弃物与磷矿工业的主要废弃物进行综合利用,实现对二者资源化,制备的产品可用于农业生产,达到提高农作物产量、改良培肥土壤。The invention discloses a preparation method of phosphorus-containing organic compound fertilizer, which includes pretreatment of distiller's grains, preparation of phosphorus-containing organic compound fertilizer and granulation packaging, specifically including the following steps: (1) Pretreatment of distiller's grains: mixing distiller's grains with water Evenly, inoculate the Aspergillus fumigatus seed culture solution, and ferment raw materials; (2) Preparation of phosphorus-containing organic compound fertilizer: 25-65 parts of pretreated distiller's grains, 35-60 parts of phosphorus tailings powder, 5-20 parts of water, inoculate One or more of Aspergillus niger seed culture solution, Bacillus megaterium seed culture solution, lactic acid bacteria seed culture solution, and white rot fungus seed culture solution, mixed evenly, and fermented with raw materials; (3) Granulating the above-mentioned fermented organic compound fertilizer ,Package. The invention comprehensively utilizes the main wastes of the liquor industry and the main wastes of the phosphate rock industry to realize resource utilization of the two, and the prepared products can be used in agricultural production, so as to increase the yield of crops and improve the fertilization of soil.

Description

一种含磷有机复合肥的制备方法A kind of preparation method of phosphorus-containing organic compound fertilizer

技术领域technical field

本发明属于生物有机复混肥料领域,具体涉及一种含磷有机复合肥的制备方法。The invention belongs to the field of bio-organic compound fertilizers, and in particular relates to a preparation method of phosphorus-containing organic compound fertilizers.

背景技术Background technique

固态白酒丢糟是白酒生产的主要副产物,也是白酒生产的主要污染物。据统计,丢糟的产生量是白酒产量4~8倍,目前全国需处理的丢糟达5000万吨以上。因此,酒糟的综合利用对资源开发和环境保护具有十分重要的意义。一方面由于一般采用高粱、糯米等原料,丢糟中含有丰富的蛋白质、氨基酸、维生素以及各种微量元素等,为固态白酒丢糟的综合利用提供了良好的条件。另一方面由于特殊的生产工艺,丢糟的酸度高,易腐败变质,若不及时处理,必然严重污染环境。Solid liquor waste is the main by-product of liquor production, and it is also the main pollutant of liquor production. According to statistics, the amount of discarded grains is 4 to 8 times that of liquor production. At present, the amount of discarded grains that needs to be processed in the country is more than 50 million tons. Therefore, the comprehensive utilization of distiller's grains is of great significance to resource development and environmental protection. On the one hand, due to the general use of raw materials such as sorghum and glutinous rice, the waste grains are rich in protein, amino acids, vitamins and various trace elements, etc., which provide good conditions for the comprehensive utilization of solid liquor waste grains. On the other hand, due to the special production process, the acidity of discarded grains is high, and it is easy to spoil and deteriorate. If it is not handled in time, it will inevitably seriously pollute the environment.

磷肥是中国农业生产所需的氮、磷、钾三大基础原料肥之一,生产磷肥的主要原料是磷矿石,贵州省磷矿资源总量非常丰富,探明储量约27亿t,保有储量25亿t,是中国三大磷矿基地之一。但是,磷矿在化学浮选后将产生大量的化学浮选尾矿渣,其中w(P2O5)≤10%,w(MgO)≥15%。该类磷尾矿含磷量低,属工业固体废弃物中的矿业固体废弃物,目前我国因尾矿造成的土壤污染面积达百万亩,间接污染土地面积1000多万亩。Phosphate fertilizer is one of the three basic raw material fertilizers of nitrogen, phosphorus and potassium required for agricultural production in China. The main raw material for the production of phosphate fertilizer is phosphate rock. The total amount of phosphate rock resources in Guizhou Province is very rich, with proven reserves of about 2.7 billion tons. With a reserve of 2.5 billion tons, it is one of the three major phosphate rock bases in China. However, after chemical flotation, phosphate rock will produce a large amount of chemical flotation tailings, wherein w(P 2 O 5 )≤10%, w(MgO)≥15%. This type of phosphorus tailings has low phosphorus content and belongs to mining solid waste in industrial solid waste. At present, the area of soil pollution caused by tailings in my country has reached one million mu, and the area of indirectly polluted land has exceeded 10 million mu.

因此,本发明将固态白酒丢糟与磷尾矿粉进行结合,通过微生物作用,制备一种新型的含磷有机复合肥,符合国家大力发展循环经济的需要,实现二者的综合利用,为农业生产提供有利条件。Therefore, the present invention combines solid liquor waste grains with phosphorus tailings powder, and prepares a new type of phosphorus-containing organic compound fertilizer through the action of microorganisms, which meets the needs of the country to vigorously develop circular economy, realizes the comprehensive utilization of the two, and provides agricultural Production offers favorable conditions.

发明内容Contents of the invention

本发明的目的是将经过预处理的酒糟与磷尾矿粉混合,再经功能微生物处理,制备一种含磷有机复合肥产品。The purpose of the invention is to prepare a phosphorus-containing organic compound fertilizer product by mixing pretreated distiller's grains and phosphorus tailings powder, and then treating with functional microorganisms.

本发明采用的技术方案:含磷有机复合肥的制备方法,包括酒糟的预处理、含磷有机复合肥的制备和造粒包装,具体包括以下步骤:The technical solution adopted in the present invention: the preparation method of phosphorus-containing organic compound fertilizer, including the pretreatment of distiller's grains, the preparation and granulation packaging of phosphorus-containing organic compound fertilizer, specifically including the following steps:

(1)酒糟的预处理:酒糟与水混合均匀,按质量比2%~6%接种烟曲霉种子培养液,生料发酵;(1) Pretreatment of distiller's grains: mix distiller's grains with water evenly, inoculate Aspergillus fumigatus seed culture solution at a mass ratio of 2% to 6%, and ferment the raw material;

(2)含磷有机复合肥的制备:经过预处理的酒糟25~65份,磷尾矿粉35~60份,水5~20份,按质量比1%~6%接种黑曲霉种子培养液、巨大芽孢杆菌种子培养液、乳酸菌种子培养液、白腐真菌种子培养液中的一种以上,混匀,生料发酵;(2) Preparation of phosphorus-containing organic compound fertilizer: 25-65 parts of pretreated distiller's grains, 35-60 parts of phosphorus tailings powder, 5-20 parts of water, inoculated with Aspergillus niger seed culture solution at a mass ratio of 1%-6% , Bacillus megaterium seed culture solution, lactic acid bacteria seed culture solution, and white rot fungus seed culture solution, mixed evenly, and fermented raw material;

(3)将上述发酵好的有机复合肥造粒,包装。(3) Granulate and pack the fermented organic compound fertilizer.

所述的一种含磷有机复合肥的制备方法,在酒糟的预处理中,酒糟与水质量比为1:1~1:2。In the preparation method of the phosphorus-containing organic compound fertilizer, in the pretreatment of distiller's grains, the mass ratio of distiller's grains to water is 1:1-1:2.

所述的一种含磷有机复合肥的制备方法,在酒糟的预处理中,通风量为:15~30%,42~48℃下培养3~7天。In the preparation method of the phosphorus-containing organic compound fertilizer, in the pretreatment of distiller's grains, the ventilation rate is 15-30%, and the cultivation is carried out at 42-48° C. for 3-7 days.

所述的一种含磷有机复合肥的制备方法,在含磷有机复合肥的制备中,28~34℃下培养3~7天。The preparation method of the phosphorus-containing organic compound fertilizer includes culturing at 28-34°C for 3-7 days in the preparation of the phosphorus-containing organic compound fertilizer.

所述的一种含磷有机复合肥的制备方法,所述磷矿尾矿粉为废弃尾矿粉。In the preparation method of the phosphorus-containing organic compound fertilizer, the phosphate rock tailings powder is waste tailings powder.

所述的一种含磷有机复合肥的制备方法,造粒工艺的具体步骤如下:The preparation method of described a kind of phosphorus-containing organic compound fertilizer, the concrete steps of granulation process are as follows:

采用圆盘造粒机进行造粒,将称量好的物料置于圆盘造粒机中,启动造粒机,调节造粒机转速和圆盘倾角;待物料充分混匀后,造粒30min;停止运行造粒机后,将颗粒复合肥从圆盘造粒机中取出,将其置于70℃烘箱中干燥,然后经冷却,筛分,即可获得初成品。Use a disc granulator for granulation, put the weighed material in the disc granulator, start the granulator, adjust the speed of the granulator and the inclination of the disc; after the materials are fully mixed, granulate for 30 minutes After stopping the operation of the granulator, take out the granular compound fertilizer from the disc granulator, place it in a 70°C oven to dry, then cool and sieve to obtain the primary product.

本发明达到的有益效果:The beneficial effect that the present invention reaches:

(1)废弃物和污染物的综合利用,变废为宝(1) Comprehensive utilization of waste and pollutants, turning waste into treasure

固态白酒丢糟是白酒生产的主要副产物,也是白酒生产的主要污染物;磷尾矿含磷量低,属工业固体废弃物中的矿业固体废弃物。本发明将固态白酒丢糟与磷尾矿粉进行结合,通过微生物作用,制备一种新型的含磷有机复合肥,符合国家大力发展循环经济的需要,实现二者的综合利用,为农业生产提供有利条件。Solid liquor waste is the main by-product of liquor production and the main pollutant of liquor production; phosphorus tailings have low phosphorus content and belong to mining solid waste in industrial solid waste. The invention combines solid liquor waste grains with phosphorus tailings powder, and prepares a new type of phosphorus-containing organic compound fertilizer through the action of microorganisms, which meets the needs of the country to vigorously develop circular economy, realizes the comprehensive utilization of the two, and provides agricultural production Favorable conditions.

(2)本发明制备的有机复合肥符合有机肥的国家标准(2) The organic compound fertilizer prepared by the present invention meets the national standard of organic fertilizer

预处理:测定发酵后pH值、E4/E6值、氨态氮、有机质、发芽指数的变化。pH=5.5~8.5、E4/E6>1.5、氨态氮>0.1%、有机质>20%、发芽指数>50%。Pretreatment: Measure the changes of pH value, E4/E6 value, ammoniacal nitrogen, organic matter and germination index after fermentation. pH=5.5~8.5, E4/E6>1.5, ammoniacal nitrogen>0.1%, organic matter>20%, germination index>50%.

含磷有机复合肥的制备:测定发酵后pH值、水分、有机质、有效活菌数、粪大肠菌群数、蛔虫卵死亡率、N+P2O5+K2O含量、有效磷含量、游离酸含量的变化。pH=5.5~8.5,水分≤20%,有机质≥30%,有效活菌数(cfu)Preparation of phosphorus-containing organic compound fertilizer: determination of pH value after fermentation, water content, organic matter, number of effective viable bacteria, number of fecal coliforms, mortality of roundworm eggs, content of N+P 2 O 5 +K 2 O, content of available phosphorus, Changes in free acid content. pH=5.5~8.5, moisture ≤20%, organic matter ≥30%, effective number of viable bacteria (cfu)

≥0.20亿/g,粪大肠菌群数≤100个/g(mL),蛔虫卵死亡率≥95%,N+P2O5+K2O含量(以干基计)≥5.0%。有效磷含量(以P2O5计)的质量分数≥16.0%,游离酸含量(以P2O5计)的质量分数≤5.5%,测定后所有指标均符合有机肥的国家标准。≥0.2 billion/g, the number of fecal coliforms ≤100/g (mL), the mortality rate of roundworm eggs ≥95%, and the content of N+P 2 O 5 +K 2 O (on a dry basis) ≥5.0%. The mass fraction of available phosphorus content (calculated as P2O5) is ≥16.0%, and the mass fraction of free acid content (calculated as P2O5 ) is ≤5.5%. After the measurement , all indicators meet the national standards for organic fertilizers.

具体实施方式Detailed ways

实施例1、Embodiment 1,

(1)酒糟的预处理:酒糟与水混合按1:1混合均匀,将25g酒糟与25g水混合均匀,按1ml接种烟曲霉种子培养液,生料发酵,通风量为:25~30%,45~48℃下培养7天;(1) Pretreatment of distiller's grains: mix distiller's grains with water at a ratio of 1:1, mix 25g of distiller's grains with 25g of water evenly, inoculate 1ml of Aspergillus fumigatus seed culture solution, and ferment raw materials. The ventilation rate is: 25-30%. Cultivate at 45-48°C for 7 days;

(2)称取50g预处理过的酒糟、35g废弃磷尾矿粉,量取15ml水,分别接种2ml黑曲霉种子培养液与3ml白腐真菌种子培养液,混合均匀,于28℃下发酵3天,测定pH值、水分(质量分数)%、有机质(质量分数)%、有效磷含量(质量分数)%、游离酸含量(质量分数)%。(2) Weigh 50g of pretreated distiller's grains, 35g of waste phosphorus tailings powder, measure 15ml of water, inoculate 2ml of Aspergillus niger seed culture solution and 3ml of white rot fungus seed culture solution respectively, mix well, and ferment at 28°C for 3 days, the pH value, moisture (mass fraction)%, organic matter (mass fraction)%, available phosphorus content (mass fraction)%, and free acid content (mass fraction)% were measured.

各指标数据见下表See the table below for the data of each indicator

名称name pH值pH value 水分%Moisture% 有机质%Organic matter% 有效磷含量%Available phosphorus content% 游离酸含量%Free acid content% 数值value 8.268.26 10.6710.67 46.3346.33 17.2217.22 3.963.96

(3)采用圆盘造粒机进行造粒,将称量好的物料置于圆盘造粒机中,启动造粒机,调节造粒机转速和圆盘倾角;待物料充分混匀后,造粒30min;停止运行造粒机后,将颗粒复合肥从圆盘造粒机中取出,将其置于70℃烘箱中干燥,然后经冷却,筛分,即可获得初成品。(3) Use a disc granulator for granulation, put the weighed material in the disc granulator, start the granulator, adjust the speed of the granulator and the inclination of the disc; after the materials are fully mixed, Granulate for 30 minutes; after stopping the operation of the granulator, take the granulated compound fertilizer out of the disc granulator, place it in an oven at 70°C to dry, then cool and sieve to obtain the primary product.

实施例2、Embodiment 2,

(1)酒糟的预处理:酒糟与水混合按1:1.5混合均匀,将250g酒糟与375g水混合均匀,按25ml接种烟曲霉种子培养液,生料发酵,通风量为:20~30%,42~45℃下培养7天;(1) Pretreatment of distiller's grains: mix distiller's grains with water at a ratio of 1:1.5, mix 250g of distiller's grains with 375g of water, inoculate 25ml of Aspergillus fumigatus seed culture solution, and ferment the raw meal. The ventilation rate is 20-30%. Cultivate for 7 days at 42-45°C;

(2)称取350g预处理过的酒糟、550g废弃磷尾矿粉,量取100ml水,分别接种6ml巨大芽孢杆菌种子培养液与1ml乳酸菌种子培养液,于自然通风条件下敞开堆制7天,温度为28~30℃。测定pH值、水分(质量分数)%、有机质(质量分数)%、、有效磷含量(质量分数)%、游离酸含量(质量分数)%。(2) Weigh 350g of pretreated distiller's grains, 550g of waste phosphorus tailings powder, measure 100ml of water, inoculate 6ml of Bacillus megaterium seed culture solution and 1ml of lactic acid bacteria seed culture solution respectively, and open the heap under natural ventilation for 7 days , the temperature is 28-30°C. Determination of pH value, moisture (mass fraction)%, organic matter (mass fraction)%, available phosphorus content (mass fraction)%, free acid content (mass fraction)%.

各指标数据见下表See the table below for the data of each indicator

名称name pH值pH value 水分%Moisture % 有机质%Organic matter % 有效磷含量%Available phosphorus content% 游离酸含量%Free acid content% 数值value 8.478.47 8.718.71 31.531.5 37.1337.13 4.784.78

(3)采用圆盘造粒机进行造粒,将称量好的物料置于圆盘造粒机中,启动造粒机,调节造粒机转速和圆盘倾角;待物料充分混匀后,造粒30min;停止运行造粒机后,将颗粒复合肥从圆盘造粒机中取出,将其置于70℃烘箱中干燥,然后经冷却,筛分,即可获得初成品。(3) Use a disc granulator for granulation, put the weighed material in the disc granulator, start the granulator, adjust the speed of the granulator and the inclination of the disc; after the materials are fully mixed, Granulate for 30 minutes; after stopping the operation of the granulator, take the granulated compound fertilizer out of the disc granulator, place it in an oven at 70°C to dry, then cool and sieve to obtain the primary product.

实施例3、Embodiment 3,

(1)酒糟的预处理:酒糟与水混合按1:2混合均匀,将2500g酒糟与5000g水混合均匀,按450ml接种烟曲霉种子培养液,生料发酵,通风量为:15~20%,42~45℃下培养7天;(1) Pretreatment of distiller's grains: mix distiller's grains with water at a ratio of 1:2, mix 2,500g of distiller's grains with 5,000g of water, inoculate 450ml of Aspergillus fumigatus seed culture solution, and ferment the raw meal. The ventilation rate is 15-20%. Cultivate for 7 days at 42-45°C;

(2)称取5800g预处理过的酒糟、3800g磷尾矿粉,量取1000ml水,分别接种400ml黑曲霉种子培养液、400ml巨大芽孢杆菌种子培养液,于自然通风条件下敞开堆制5天,温度为30~34℃。测定pH值、水分(质量分数)%、有机质(质量分数)%、有效磷含量(质量分数)%、游离酸含量(质量分数)%。(2) Weigh 5800g of pretreated distiller's grains, 3800g of phosphorous tailings powder, measure 1000ml of water, inoculate 400ml of Aspergillus niger seed culture solution and 400ml of Bacillus megaterium seed culture solution respectively, and open the heap for 5 days under natural ventilation conditions , the temperature is 30-34°C. Determination of pH value, moisture (mass fraction)%, organic matter (mass fraction)%, available phosphorus content (mass fraction)%, free acid content (mass fraction)%.

各指标数据见下表See the table below for the data of each indicator

名称name pH值pH value 水分%Moisture % 有机质%Organic matter% 有效磷含量%Available phosphorus content% 游离酸含量%Free acid content% 数值value 7.417.41 7.547.54 55.155.1 22.822.8 3.673.67

(3)采用圆盘造粒机进行造粒,将称量好的物料置于圆盘造粒机中,启动造粒机,调节造粒机转速和圆盘倾角;待物料充分混匀后,造粒30min;停止运行造粒机后,将颗粒复合肥从圆盘造粒机中取出,将其置于70℃烘箱中干燥,然后经冷却,筛分,即可获得初成品。(3) Use a disc granulator for granulation, put the weighed material in the disc granulator, start the granulator, adjust the speed of the granulator and the inclination of the disc; after the materials are fully mixed, Granulate for 30 minutes; after stopping the operation of the granulator, take the granulated compound fertilizer out of the disc granulator, place it in an oven at 70°C to dry, then cool and sieve to obtain the primary product.

Claims (6)

1.一种含磷有机复合肥的制备方法,其特征在于:包括酒糟的预处理、含磷有机复合肥的制备和造粒包装,具体包括以下步骤:  1. a preparation method of phosphorus-containing organic compound fertilizer, is characterized in that: comprise the pretreatment of distiller's grains, preparation and granulation packing of phosphorus-containing organic compound fertilizer, specifically comprise the following steps: (1)酒糟的预处理:酒糟与水混合均匀,按质量比2%~6%接种烟曲霉种子培养液,生料发酵; (1) Pretreatment of distiller's grains: mix distiller's grains with water evenly, inoculate Aspergillus fumigatus seed culture solution at a mass ratio of 2% to 6%, and ferment the raw material; (2)含磷有机复合肥的制备:经过预处理的酒糟25~65份,磷尾矿粉35~60份,水5~20份,按质量比1%~6%接种黑曲霉种子培养液、巨大芽孢杆菌种子培养液、乳酸菌种子培养液、白腐真菌种子培养液中的一种以上,混匀,生料发酵; (2) Preparation of phosphorus-containing organic compound fertilizer: 25-65 parts of pretreated distiller's grains, 35-60 parts of phosphorus tailings powder, 5-20 parts of water, inoculated with Aspergillus niger seed culture solution at a mass ratio of 1%-6% , Bacillus megaterium seed culture solution, lactic acid bacteria seed culture solution, and white rot fungus seed culture solution, mixed evenly, and fermented raw material; (3)将上述发酵好的有机复合肥造粒,包装。 (3) Granulate and pack the fermented organic compound fertilizer. 2.根据权利要求1所述的一种含磷有机复合肥的制备方法,其特征在于:在酒糟的预处理中,酒糟与水质量比为1:1~1:2。 2. The preparation method of a kind of phosphorus-containing organic compound fertilizer according to claim 1, characterized in that: in the pretreatment of distiller's grains, the mass ratio of distiller's grains to water is 1:1 ~ 1:2. 3.根据权利要求1所述的一种含磷有机复合肥的制备方法,其特征在于:在酒糟的预处理中,通风量为:15~30%,42~48℃下培养3~7天。 3. The preparation method of a kind of phosphorus-containing organic compound fertilizer according to claim 1, characterized in that: in the pretreatment of distiller's grains, the ventilation rate is: 15-30%, and it is cultivated at 42-48°C for 3-7 days . 4.根据权利要求1所述的一种含磷有机复合肥的制备方法,其特征在于:在含磷有机复合肥的制备中,28~34℃下培养3~7天。 4. The method for preparing a phosphorus-containing organic compound fertilizer according to claim 1, characterized in that: in the preparation of the phosphorus-containing organic compound fertilizer, the method is cultivated at 28-34°C for 3-7 days. 5.根据权利要求1-4任一项所述的一种含磷有机复合肥的制备方法,其特征在于:所述磷矿尾矿粉为废弃尾矿粉。 5. The method for preparing a phosphorus-containing organic compound fertilizer according to any one of claims 1-4, characterized in that: the phosphate rock tailings powder is waste tailings powder. 6.根据权利要求1所述的一种含磷有机复合肥的制备方法,其特征在于:造粒工艺的具体步骤如下: 6. the preparation method of a kind of phosphorus-containing organic compound fertilizer according to claim 1 is characterized in that: the concrete steps of granulation process are as follows: 采用圆盘造粒机进行造粒,将称量好的物料置于圆盘造粒机中,启动造粒机,调节造粒机转速和圆盘倾角;待物料充分混匀后,造粒30min;停止运行造粒机后,将颗粒复合肥从圆盘造粒机中取出,将其置于70℃烘箱中干燥,然后经冷却,筛分,即可获得初成品。 Use a disc granulator for granulation, put the weighed material in the disc granulator, start the granulator, adjust the speed of the granulator and the inclination of the disc; after the materials are fully mixed, granulate for 30 minutes After stopping the operation of the granulator, take out the granular compound fertilizer from the disc granulator, place it in a 70°C oven to dry, then cool and sieve to obtain the primary product.
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