阅读说明：本技术 一种制备控释磷铵肥料的方法 (Method for preparing controlled-release ammonium phosphate fertilizer ) 是由 谭江艳 吴贤兵 高丽 张红艳 于 2018-08-27 设计创作，主要内容包括：一种制备控释磷铵肥料的方法,包括在制备过程中,将磷铵料浆中的裂解、粉碎、共混、老化、干燥、加入释放控制材料,或添加释放控制材料。磷酸氢铵粉末选择性地,将硫酸加入到释放控制材料和磷酸铵浆料或磷酸铵粉末的混合物中以酸化混合物。在该方法中,控释材料通过化学键合与磷酸铵结合,控制氮磷养分的释放,提高磷铵控释肥料的使用效率和延长施肥效果。此外,本发明的制造设备与传统磷铵肥料的设备制造基本相同,并且容易释放出诸如释放控制材料的原材料,不需要额外的制造和产品成本。本发明中的酶。(A process for preparing a controlled release ammonium phosphate fertilizer comprises cracking, pulverizing, blending, aging, drying, and adding a release controlling material or adding a release controlling material to ammonium phosphate slurry during the preparation process. Ammonium hydrogen phosphate powder optionally, sulfuric acid is added to the mixture of the release controlling material and the ammonium phosphate slurry or powder to acidify the mixture. In the method, the controlled-release material is combined with ammonium phosphate through chemical bonding to control the release of nitrogen and phosphorus nutrients, improve the use efficiency of the ammonium phosphate controlled-release fertilizer and prolong the fertilizing effect. Furthermore, the manufacturing equipment of the present invention is substantially the same as the equipment manufacturing of conventional ammonium phosphate fertilizers, and easily releases raw materials such as release control materials, without requiring additional manufacturing and product costs. The enzyme of the present invention.)

1. A method of preparing a controlled release ammonium phosphate fertilizer, characterized in that: the method comprises the following steps: and adding a release control material into the ammonium phosphate slurry, uniformly mixing the ammonium phosphate slurry and the release control material, and condensing the mixture of the ammonium phosphate slurry and the release control material to the water content of the mixture. On the basis of the dry weight of the ammonium phosphate slurry, 25 multiplied by 35% (W/W, based on the dry weight of the ammonium phosphate slurry) is achieved, and the concentrated mixture of the ammonium phosphate slurry and the release control material is granulated to obtain granular controlled-release ammonium phosphate fertilizer; sulfuric acid is further added to the mixture of ammonium phosphate and release control material to acidify the mixture prior to condensation; wherein the sulfuric acid is 1: 20% (W/W, based on dry weight of ammonium phosphate slurry); the release controlling material is selected from at least one of zeolite, montmorillonite, pillared montmorillonite, lignin and alkali lignin and lignosulfonate or lignosulfonate; the granulation method is selected from the group consisting of slurry granulation, spray granulation, and fluidized granulation.

2. The method of claim 1, wherein the controlled release ammonium phosphate fertilizer comprises: the release controlling material is in a proportion of 3 x 35% (W/W, based on the weight of the ammonium phosphate powder) and the water is in a proportion of 3 x 40% (W/W, based on the weight of the ammonium phosphate powder).

3. The method of claim 1, wherein the controlled release ammonium phosphate fertilizer comprises: the release controlling material is selected from at least one of acidified zeolites, acidified montmorillonite, acidified pillared montmorillonite, and acidified lignin of acidified lignin sulfonate. A lignosulfonate.

4. The method of claim 1, wherein the controlled release ammonium phosphate fertilizer comprises: the method comprises the following steps: adding the controlled release material and water to the ammonium phosphate powder, uniformly mixing the ammonium phosphate powder, the controlled release material and the water to form a mixture, crushing the mixture, activating the components in the mixture by piling, and drying the activated mixture to realize mixing. A controlled release ammonium phosphate fertilizer.

Technical Field

The present invention relates to a method for preparing a phosphate ammonium fertilizer, and more particularly, to a method for preparing a controlled release phosphate ammonium fertilizer that continuously and efficiently releases nutrients to soil.

Background

Ammonium phosphate is the main compound fertilizer of nitrogen and phosphorus, is two basic nutrients of plants, and accounts for 58 percent of the market share of all phosphate fertilizers in the world. Ammonium phosphate is used as a base fertilizer or an additional fertilizer, and is more likely to be used as a main component of a mixed fertilizer or a complex fertilizer because ammonium phosphate has excellent compatibility to match with other different fertilizers. Ammonium phosphate and other phosphate fertilizers, such as superphosphate, nitrophosphate and calcium magnesium phosphate, have the fatal disadvantage that most of the phosphate is easily fixed in the soil and released too slowly or unusable. Therefore, phosphate fertilizers have low long-term efficiency and are not completely absorbed by plants, resulting in a low utilization rate of the phosphate fertilizer in the growing season of crops of 15-20%.

Disclosure of Invention

The present invention aims to overcome the above-mentioned disadvantages of the prior art and to provide a method for producing a controlled release ammonium phosphate fertilizer with high efficiency and low production cost. Reduces the product cost of the ammonium phosphate fertilizer and improves the use efficiency.

The technical scheme of the invention is as follows: the method comprises the following steps: and adding a release control material into the ammonium phosphate slurry, uniformly mixing the ammonium phosphate slurry and the release control material, and condensing the mixture of the ammonium phosphate slurry and the release control material to the water content of the mixture. On the basis of the dry weight of the ammonium phosphate slurry, 25 multiplied by 35% (W/W, based on the dry weight of the ammonium phosphate slurry) is achieved, and the concentrated mixture of the ammonium phosphate slurry and the release control material is granulated to obtain granular controlled-release ammonium phosphate fertilizer; sulfuric acid is further added to the mixture of ammonium phosphate and release control material to acidify the mixture prior to condensation; wherein the sulfuric acid is 1: 20% (W/W, based on dry weight of ammonium phosphate slurry); the release controlling material is selected from at least one of zeolite, montmorillonite, pillared montmorillonite, lignin and alkali lignin and lignosulfonate or lignosulfonate; the granulation method is selected from the group consisting of slurry granulation, spray granulation, and fluidized granulation.

The release controlling material is in a proportion of 3 x 35% (W/W, based on the weight of the ammonium phosphate powder) and the water is in a proportion of 3 x 40% (W/W, based on the weight of the ammonium phosphate powder).

The release controlling material is selected from at least one of acidified zeolites, acidified montmorillonite, acidified pillared montmorillonite, and acidified lignin of acidified lignin sulfonate. A lignosulfonate.

The method comprises the following steps: adding the controlled release material and water to the ammonium phosphate powder, uniformly mixing the ammonium phosphate powder, the controlled release material and the water to form a mixture, crushing the mixture, activating the components in the mixture by piling, and drying the activated mixture to realize mixing. A controlled release ammonium phosphate fertilizer.

The invention has the beneficial effects that: reduces the product cost of the ammonium phosphate fertilizer and improves the use efficiency. Additional new manufacturing equipment is not required, thereby economically preparing the fertilizer.

Detailed Description

The preparation method of the controlled release ammonium phosphate fertilizer comprises the following steps: in the preparation process or the addition process, the ammonium phosphate slurry is cracked, crushed, mixed, aged and dried, and a release control material is added into the ammonium phosphate slurry. Drying the release controlling material in the ammonium phosphate product. The detailed description of the method is as follows: (1) adding a cracking release control material before concentrating the ammonium phosphate slurry at a ratio of 3: 35% (W/W, based on dry weight of the ammonium phosphate slurry); uniformly mixing the ammonium phosphate slurry and the release control material into a mixture; condensing the mixture of ammonium phosphate slurry and release control material until the water content of the mixture is reduced to 25 x 35%; and granulating the concentrated mixture of ammonium phosphate slurry and the release control material to obtain the granular ammonium phosphate fertilizer, wherein the beneficiation method comprises slurry granulation, spray granulation or fluidized particle. (2) Adding a cracking release control material before concentrating the ammonium phosphate slurry at a ratio of 3: 35% (w/w, based on dry weight of the ammonium phosphate slurry); uniformly mixing the ammonium phosphate slurry and the release control material into a mixture; adding sulfuric acid to the mixture in an acidification ratio of 1-20% (W/W, based on dry weight of ammonium phosphate slurry); condensing the acidified mixture of ammonium phosphate slurry and release control material until the water content of the mixture is reduced to 25 x 35%; granulating the concentrated mixture of ammonium phosphate slurry and the release controlling material to obtain a granulated ammonium phosphate fertilizer, wherein the granulation method is selected from the following methods: slurry granulation, spray granulation or fluidized particles; and (6) ending. (3) Adding a cracking release controlling material and water to the dry ammonium phosphate powder, wherein the cracking release controlling material is in a ratio of 3: 35% (W/W, based on dry weight of the ammonium phosphate powder) and the water is in a ratio of 3: 40% (W/W, based on dry weight of the ammonium phosphate powder); uniformly mixing ammonium phosphate powder, a release control material and water into a mixture; thoroughly crushing the mixture; activating the components in the mixture by stacking; drying the activated mixture to achieve a controlled release ammonium phosphate fertilizer. (4) A cracking release controlling material and water are added to the dry ammonium phosphate powder, wherein the proportion of cracking release controlling material is 3: 35% (W/W based on dry weight of ammonium phosphate powder) and the proportion of water is 3: 40% (W/W based on dry weight of ammonium phosphate powder). Uniformly mixing ammonium phosphate powder, a release control material and water into a mixture; thoroughly crushing the mixture; acidifying the mixture in a proportion of 1-20% (W/W, based on dry weight of ammonium phosphate powder) by adding sulfuric acid to the mixture; cooking the mixture in an activation chamber to form a pulp fertilizer; and drying the pulp fertilizer to realize the controlled release of the ammonium phosphate fertilizer. The release controlling material is selected from at least one of zeolite, montmorillonite, pillared montmorillonite, and lignin containing alkali lignin and lignosulfonate or lignosulfonate. The release controlling material used in the methods (3) and (4) having an acidifying action is at least one selected from the group consisting of acidified zeolites, acidified montmorillonites, acidified pillared montmorillonites, acidified alkali lignified lignins and acidified lignosulfonates. TE or lignosulfonate. The release controlling material is pulverized into particles of 0.2-0.04 mm.