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A compound fertilizer and high-tower granulation technology, which is applied in the direction of fertilizer form, fertilizer mixture, fertilization device, etc., can solve the problems that are difficult to meet the needs of crop growth, so as to facilitate mechanized fertilization, improve the utilization rate of soil fertilizer, and resist pressure high intensity effect
Inactive Publication Date: 2013-01-30
张超
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Problems solved by technology
The high-nitrogen, low-phosphorus high-tower granulated urine-sulfur-based compound fertilizers currently available in the market are difficult to meet the needs of crop growth
Method used
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Embodiment 1
[0047] Prepare the high-tower granulated low-nitrogen and high-phosphorus urea-sulfur-based compound fertilizer of the present invention according to the following steps
[0048] A. Pulping
[0049] a. Urea melting, metering and feeding
[0050] Pour granular urea into the urea belt conveyor, lift it to the urea silo through the bucket elevator, and enter the urea melter through the screw conveyor. After the urea melts, it flows into the urine buffer tank and is transported to the urea through the urine pump and mass flow meter. The first-level mixing tank on the top of the tower, the urea melt entering the first-level mixing tank is 35 parts by weight;
[0051] b. Measuring and feeding of other raw materials
[0052] The monoammonium phosphate and potassium sulfate are poured into the belt conveyor respectively, and are lifted to their respective silos by the bucket elevator. Electronic metering belt scales are installed at the bottom of the silo to measure 32.3 parts by we...
Embodiment 2～ Embodiment 7
[0056] According to the method and steps of Example 1, prepare the high-tower granulated low-nitrogen high-phosphorus urea-sulfur-based compound fertilizer of the present invention according to the raw material formula in Table 1
[0057] Table 1
[0058] raw material name
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Abstract
The invention discloses a tower-granulated low-nitrogen high-phosphorus urine sulfur radical compound fertilizer and a preparation method thereof, belonging to a fertilizer mixture. The compound fertilizer is characterized by being prepared from the following raw materials in parts by mass: 34-35 parts of urea, 32-33 parts of monoammonium phosphate, 32-33 parts of potassium sulfate and 1-1.5 parts of viscosity reducer, wherein the viscosity reducer is modified lignosulfonate. The invention provides a tower-granulated low-nitrogen high-phosphorus urine sulfur radical compound fertilizer which can meet the nutrition requirements on nitrogen, phosphorus, potassium and sulfur for crop growth and ensures that the product particles are uniform, smooth, mellow and full, small contraction cavities are formed, natural anti-counterfeiting function is realized, caking of the product is prevented, the compressive strength is relatively high and mechanical fertilizing is convenient to carry out; moreover, the invention also provides a preparation method which has advantages of high technical adaptability, high compatibility, energy conservation, small investment and relatively low production cost. The compound fertilizer disclosed by the invention is applicable to various crops such as rice, cotton, corn, peanut, soybean, wheat, rape and the like as well as medium and high-grade cash crops such as vegetable, fruit trees, forest trees, flowers, tea and the like. The content of N is less than 20% by weight, and the content of P2O5 is more than or equal to 15% by weight.
Description
technical field [0001] The invention relates to a high-tower granulated low-nitrogen, high-phosphorus, urea-sulfur-based compound fertilizer and a manufacturing method thereof, belonging to fertilizer mixtures. Background technique [0002] Although the high-tower granulation compound fertilizer process solves the problem of low nitrogen content in traditional compound (compound) fertilizers, new technical problems arise when it is used to manufacture low-nitrogen and high-phosphorus granular products. [0003] At present, most of the high-tower granulated urine-sulfur-based compound fertilizers belong to the series of high nitrogen and low phosphorus. Among the ingredients, N≥20%, phosphorus P 2 o 5 ≤12%. The reason is that low-nitrogen and high-phosphorus series melt slurry has high viscosity and poor fluidity, which is easy to block pipes and nozzles, and is forced to stop frequently for replacement, resulting in a low operating rate and reducing the production capacity...
Claims
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