Drying-free granulating process of composite fertilizer

A compound fertilizer, non-drying technology, applied in the direction of fertilizer form, fertilization device, fertilizer mixture, etc., can solve the problems of increased control device cost, fast chemical reaction speed, uneven heat distribution, etc., to reduce equipment cost and simplify production process process, and the effect of reducing environmental pollution

Active Publication Date: 2013-12-18
滁州华冶机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the supply of liquid ammonia needs to be controlled, the cost of the control device needs to be increased; and the chemical reaction between liquid ammonia and sulfuric acid, monoammonium phosphate and other raw materials is fast, which will ma

Method used

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  • Drying-free granulating process of composite fertilizer
  • Drying-free granulating process of composite fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1: If a new compound fertilizer with a formula of N-P-K of 24-12-10 is formulated, the raw materials used in the raw material batching process are 46% N urea, 11% N 44% P 2 O 5 Monoammonium phosphate, 60%K 2 The corresponding parts of potassium chloride of O are 47 parts, 23 parts, and 20 parts in sequence; in the process of raw material granulation, the binder added is 82% MgO magnesium oxide powder and 85% H 3 PO 4 In the phosphoric acid solution, the number of magnesium oxide powder is 8-15, and the number of phosphoric acid solution is 3-6. The optimized scheme is that the number of magnesium oxide powder is 10 and the number of phosphoric acid solution is 4.

Example Embodiment

[0023] Example 2: If a new compound fertilizer with a N-P-K ratio of 20-15-10 is formulated, the raw materials used are 46% N urea and 11% N 44% P in the raw material batching process. 2 O 5 Monoammonium phosphate, 57%K 2 The corresponding parts of potassium chloride of O are 35 parts, 35 parts, and 17 parts in turn; in the process of raw material granulation, the binder added is 82% MgO magnesium oxide powder and 85% H 3 PO 4 In the phosphoric acid solution, the number of magnesium oxide powder is 10-17, and the number of phosphoric acid solution is 3-6. The optimized scheme is that the number of magnesium oxide powder is 13 and the number of phosphoric acid solution is 4.

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Abstract

The invention provides a drying-free granulating process of a composite fertilizer. The granulating process comprises the following process links of preparing raw materials, mixing the raw materials, granulating the raw materials, cooling the granules, collecting dust from the granules, grading the granules, enveloping the finished product with a film, packaging the finished product and the like. The drying-free granulating process is characterized in that the raw materials in the process link of preparing the raw materials include urea, monoammonium phosphate and potassium chloride; and in the process link of granulating the raw materials, a binding agent consisting of a magnesium oxide powder and a phosphoric acid solution is added into a granulator according to a certain proportion. Compared with the prior part, the process for producing the composite fertilizer has the advantages that the process flow is simplified, the production efficiency of the composite fertilizer is improved, the equipment cost is reduced, the energy consumption is reduced, and simultaneously, the environment pollution can also be reduced.

Description

technical field [0001] The invention relates to a compound fertilizer production technology, in particular to a compound fertilizer production technology with an improved granulation process. Background technique [0002] The traditional compound fertilizer production process mainly includes raw material batching, raw material mixing, raw material granulation, granule drying, granule cooling, granule classification, finished product coating, finished product packaging, etc. Among them, steam boiler heating is required in the raw material granulation stage to realize the smooth granulation process of raw materials; in the granule drying stage, the combustion furnace is heated to dry the moisture contained in the granules to increase the strength of the granules and facilitate storage. This makes the traditional compound fertilizer production process consume a lot of energy. At the same time, using the traditional compound fertilizer production process, it is also necessary t...

Claims

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Application Information

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IPC IPC(8): C05G5/00C05G3/00C05G3/08C05G1/06C05G3/90
Inventor 龚先锋
Owner 滁州华冶机电科技有限公司
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