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A kind of manufacture method of granular potassium chloride
CN1769248A
China
- Other languages
Chinese - Inventor
曹卫宇 陈国华 周志英 潘振玉 - Current Assignee
- Shanghai Research Institute of Chemical Industry SRICI
Worldwide applications
2004
CN
Application CN 200410067909 events
2004-11-05
2006-05-10
2008-01-16
Application granted
2008-01-16
2024-11-05
Anticipated expiration
Status
Expired - Fee Related
Description
translated from
Technical field
The present invention relates to fertilizer production technology, specifically relate to a kind of manufacture method that is used for the granule potassium chloride of bulk blended fertilizer use.
Background technology
Compare with powdered fertilizer, granulated fertilizer has many good physicalies.Do not play dirt when for example loading and unloading, long-term storage is not lumpd, good fluidity, and easy spreading during fertilising, and can realize aerial application.Simultaneously, granulated fertilizer also can play certain slow releasing function, can improve fertilizer utilization ratio.In addition, the fertilizer of the different varieties that granular size is close can carry out direct blending, obtains bulk blended fertilizer (some place is called BB fertilizer) cheaply, has the fertilizer efficiency same with compound manure.Recent two decades comes, and production developments such as granular urea, phosphorus ammonium, compound manure are rapid in the world, and fertiliser granulates changes into and is one of development trend of current chemical fertilizer.
The potash fertilizer of current production is mainly based on powder-like product.Because the inviscid and plasticity-of Repone K itself adopts conventional method to be difficult to granulation.Powdery Repone K is applicable to the production compound manure, but as directly using, then granulated fertilizer obviously is better than powder-like product.The required granule potassium chloride of bulk blended fertilizer factory is granular Repone K or block Repone K at present, and production cost is higher.And block Repone K can cause the component of bulk blended fertilizer inhomogeneous in use, influences quality product and result of use.Therefore, the shortage of particulate state Repone K has become the obstacle of bulk blended fertilizer development.
BB fertilizer is the product that multiple granulated fertilizer is made by mechanical blending.The fertile production technique of BB is simple, and prescription is flexible, and product has adaptability widely.But producing BB fertilizer must need granular potash fertilizer.At present, the granular potash fertilizer of the overwhelming majority all is to be raw material with powdery potash fertilizer, and production technique adopts the roll-type extrusion process to produce.Extruder grain has characteristics such as energy consumption is low, investment is less, limit of power is wide; but; the product particle roundness of extruder grain is poor; the fertilizer size range is difficult for regulating; fertilizer product is not suitable for being used for the production of BB fertilizer, and Squeezinggranulator unit throughput is limited, equipment consumable accessory transposing expense height; maintenance of equipment expense height also is not suitable for scale operation.
Summary of the invention
The objective of the invention is to adopt granulating disc or rotary drum granulator, do highly effective binder, Repone K is carried out granulation with hydrolyzed starch.It has, and operating procedure is simple, and throughput is big, low production cost, product cut size wide ranges, uniform particles rounding, characteristics such as granule strength height.Method of the present invention can be produced the granule potassium chloride of all size that can be used for bulk blended fertilizer by means of the prilling granulators of the multiple fertile manufacturing enterprises of present great majority.
The present invention is achieved in that the manufacture method step of this granule potassium chloride comprises:
(1) the granulation preparation of hydrolysis starch adesive: in hydrolytic reaction pot, add entry and starch in proportion, under the mechanical stirring, be heated to 50～120 ℃ and be hydrolyzed, constant temperature was kept 15～180 minutes, was made for the hydrolyzed starch binding agent of 0.5～20 weight %,
(2) the powdery Repone K of the granulation of powdery Repone K: fineness≤0.25mm joins granulation in granulating disc or the rotary drum granulator; the material bed tempertaure is controlled at 30～110 ℃; spray into the hydrolyzed starch binding agent of counting 0.2～10 weight % with butt in proportion; the spraying temperature of hydrolyzed starch binding agent is controlled at 20～90 ℃; the granulation balling-up; drying, screening makes the granule potassium chloride finished product.
Hydrolyzed starch binding agent among the present invention adopts wheat, corn, jowar, potato class, the preparation of beans native starch class.
The hydrolyzed starch binding agent preferred concentration of making among the present invention is 3～6 weight %.
Among the present invention during granulation the hydrolyzed starch binding agent be preferably 0.4～1.5 weight % in the consumption of butt.
Defective particle in the production process of the present invention can be used as returning charge and repeats granulation, and the weight ratio of returning charge and raw material is 0.5～4: 1.
The particle diameter of the granule potassium chloride that the bulk blended fertilizer that makes among the present invention is required is 2～4.5mm.
The Repone K granulation can be adopted disk or roller equipment among the present invention, and is identical with conventional compound manure production equipment.If raw materials for production are small-particle Repone K, need carry out pre-treatment earlier, be crushed to less than 0.25mm; If raw materials for production are powdery Repone K, directly processing treatment can be produced granule potassium chloride.
The used binding agent of method of the present invention is the hydrolyzed starch binding agent, can not produce any adverse influence to using of Repone K.
The granule potassium chloride that the inventive method is produced can be used for producing the multiple bulk blended fertilizer of high, medium and low concentration.
The present invention compared with prior art has the following advantages:
1, method of the present invention has that technical process is short, easy and simple to handle, production efficiency is high, energy consumption is low and characteristics such as reduced investment.
2, the granule potassium chloride product that adopts the inventive method to produce, granule strength is big, the fertiliser granulates rounding, surface lubrication does not have any caking phenomenon.
3, product of the present invention can be made into the compound manure that contains various trace elements, to adapt to the requirement of Different Crop, soil, weather.
Embodiment
In order to implement the present invention better, the present invention is further illustrated now to enumerate the following example, and still, embodiment is not a limitation of the present invention.
Embodiment 1
W-Gum 60 grams and 940 gram water mix, and mechanical stirring is heated to 90 ℃, constant temperature 60 minutes, and making concentration is the hydrolyzed starch binding agent of 6 weight %.
Exsiccant powdery Repone K 500 grams join in the granulating disc; the material bed tempertaure is controlled at 70 ℃; spraying into temperature is the hydrolyzed starch binding agent of 60 ℃ the above-mentioned concentration that the prepares 6 weight % of 120 grams; the granulation balling-up; again through super-dry, screening; be cooled to normal temperature, obtain qualified granule potassium chloride product 320 grams.
Embodiment 2
Wheat starch 30 grams and 970 gram water mix, and mechanical stirring is heated to 95 ℃, constant temperature 45 minutes, and making concentration is the hydrolyzed starch binding agent of 3 weight %.
In rotary drum granulator, add granularity and be not more than 60 purpose particulate Repone K, 230 grams; the material bed tempertaure is controlled at 30 ℃; spray into hydrolyzed starch binding agent 86 grams of the above-mentioned concentration for preparing 3 weight %; spraying temperature is controlled at 80 ℃, and the granulation balling-up is again through super-dry, screening; obtaining particle diameter is the qualified particle of 230 gram granule potassium chlorides of 2～4.4mm; particle diameter uses as returning charge through pulverizing the back greater than 4.5mm with less than the particle of 2mm, and the returning charge ratio is 1.13: 1.
Embodiment 3
Meet embodiment 2; returning charge 440 grams join in the rotary drum granulator with particulate Repone K 250 grams, and the material bed tempertaure is controlled at 80 ℃, hydrolyzed starch binding agent 85 grams of 3 weight % of spraying embodiment 2 preparations; spraying temperature is controlled at 80 ℃; the granulation balling-up, drying, screening; obtaining particle diameter is the qualified particle of 250 gram granule potassium chlorides of 2～4.4mm; particle diameter uses as returning charge through pulverizing the back greater than 4.5mm with less than the particle of 2mm, and the returning charge ratio is 1.76: 1.
Embodiment 4-11
The preparation method of hydrolyzed starch binding agent and the prilling process of Repone K are with embodiment 2, dewater and the numerical value of dosage, hydrolysis temperature, constant temperature time, material bed tempertaure, binding agent dosage, spraying temperature and the returning charge ratio of starch sees Table in 1 outside the data, all the other operations and parameter are with embodiment 2.
Table 1
| Embodiment | The hydrolyzed starch adhesive preparation | The granulation of powdery Repone K | ||||||
| Starch g | Water g | Hydrolysis temperature ℃ | Constant temperature time min | Material bed tempertaure ℃ | Binding agent dosage weight % (butt meter) | Spraying temperature ℃ | The returning charge ratio | |
| 4 | 5 | 995 | 50 | 180 | 110 | 0.2 | 20 | 4∶1 |
| 5 | 10 | 990 | 90 | 130 | 90 | 0.5 | 30 | 3.5∶1 |
| 6 | 20 | 980 | 95 | 135 | 85 | 0.5 | 40 | 3.5∶1 |
| 7 | 5 | 995 | 120 | 15 | 70 | 1.0 | 50 | 3∶1 |
| 8 | 10 | 990 | 120 | 20 | 70 | 2.0 | 50 | 3∶1 |
| 9 | 5 | 995 | 110 | 25 | 60 | 5.0 | 60 | 2.5∶1 |
| 10 | 100 | 900 | 120 | 40 | 50 | 8.0 | 80 | 1∶1 |
| 11 | 200 | 800 | 120 | 105 | 50 | 10 | 90 | 0.5∶1 |
Claims (6)
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translated from Chinese
Claims (6)
Hide Dependent
translated from Chinese