CN1061965C - Multi-element high-effect composite fertilizer - Google Patents

Abstract

Multi-element compound fertilizer is made on the basis of nitrogen, phosphorus and potassium fertilizers necessary for plant growth. The main point is to use the medium-alkaline tuff (commonly known as wool stone) of the Lower Tertiary Caijiachong Formation as a carrier to provide various trace elements and rare earth elements . After grinding and screening, it is mixed with the corresponding proportion of nitrogen, phosphorus and potassium fertilizers, mixed evenly, mixed with water, processed into granules by granulation equipment, and dried to become the finished product. The process is simple, the cost is low, and it is suitable for planting crops in acidic soil.

Description

Manufacturing method of multi-element compound fertilizer

The invention belongs to a manufacturing method of multi-element compound fertilizer.

The application of nitrogen, phosphorus and potassium compound fertilizers plays an important role in supplementing the three main nutrients for plant growth, and is an important technical measure to ensure the growth of food crops and various economic crops. However, the requirements of general crops for nutrients in the soil cannot be met by supplementing only nitrogen, phosphorus, and potassium. Especially to improve the quality of agricultural products, some trace elements and rare earth elements must also be provided for crops. Therefore, compound fertilizers containing multiple elements have become an important means to increase agricultural production and improve the quality of agricultural products. Many are based on nitrogen, phosphorus, and potassium, and some compound fertilizers made according to the growth needs of specific crops and soil conditions are added thereupon. As far as the growth of tobacco and mulberry trees is concerned, calcium, magnesium, sulfur, iron, copper, manganese, zinc and rare earth elements have special effects on promoting the absorption of phosphorus and potassium and improving the utilization rate of urea. At present, the Greek-made compound fertilizers used by farmers are formulated with nitrogen, phosphorus, and potassium. The ratio of nitrogen:phosphorus:potassium is 15:15:15, which lacks copper, iron, manganese, zinc, calcium, magnesium, and rare earth elements. . Therefore, during the fertilization process, farmers must also apply trace element compound fertilizers such as FTE produced in Japan and rare earth micro-fertilizers. It increases the production cost of farmers and also increases the country's foreign exchange expenditure. In addition, since rare earth micro-fertilizers are generally sprayed, there may be radioactive radiation hazards. The use of this type of compound fertilizer only provides the nutrients needed for plant growth, but hardly improves the water absorption and water retention and compaction of the soil.

If simple trace elements and rare earth elements are used to make compound fertilizers, not only the cost is high, but also the production process will be much more complicated if plants can make good use of them. In an alkaline tuff ore of the Lower Tertiary Caijiachong Formation, it contains a variety of trace elements and rare earth elements, and has good physical properties such as water absorption and retention and expansion capacity. But also can not be utilized as a kind of raw material of producing compound fertilizer.

The purpose of the present invention is exactly to utilize the characteristics that the middle-one alkaline tuff (commonly known as wool stone) of the lower Tertiary Caijiachong Formation contains trace elements and rare earth elements needed by various plants to provide a kind of carrier with this tuff, simultaneously Commonly used nitrogen, phosphorus, and potassium fertilizers are mixed and processed into a multi-element compound fertilizer to meet the fertilizer needs of tobacco, mulberry and other crops, reduce farmers' production costs, and improve soil water absorption and compaction.

The solution to achieve the above purpose is:

A method for manufacturing multi-element compound fertilizer, which is made by adding trace elements and rare earth elements on the basis of nitrogen, phosphorus and potassium, and the key point is that the potassium oxide is greater than 3%, the magnesium oxide is greater than 4%, and the calcium oxide is greater than 3%. , more than 0.03% rare earth, more than 0.02% zinc, more than 0.006% copper, more than 0.01% manganese of the Lower Tertiary Caijiachong Formation of a basic tuff ore and nitrogen, phosphorus and potassium fertilizer, after grinding, batching, mixing, granulation , drying, and sieving to obtain the product.

The manufacturing method of the multi-element compound fertilizer for tobacco planting is that the potassium oxide is greater than 3%, the magnesium oxide is greater than 4%, the calcium oxide is greater than 3%, the rare earth is greater than 0.03%, the zinc is greater than 0.02%, the copper is greater than 0.006%, An alkaline tuff ore of the Lower Tertiary Caijiachong Formation with manganese greater than 0.01% and nitrogen, phosphorus and potassium fertilizers, wherein the weight ratio of nitrogen: phosphorus: potassium is 10:8:15, after grinding, batching, mixing, granulation, The multi-element compound fertilizer for planting tobacco is obtained by drying and sieving, and the potassium oxide provided by the middle-alkaline tuff ore of the Lower Tertiary Caijiachong Formation in the product is greater than 1%, and the total amount of rare earth is greater than 0.013%.

The manufacturing method of the multi-element compound fertilizer for mulberry planting is that the potassium oxide is greater than 3%, the magnesium oxide is greater than 4%, the calcium oxide is greater than 3%, the rare earth is greater than 0.03%, the zinc is greater than 0.02%, the copper is greater than 0.006%, An alkaline tuff ore of the Lower Tertiary Caijiachong Formation with manganese greater than 0.01% and nitrogen, phosphorus and potassium fertilizers, wherein the weight ratio of nitrogen: phosphorus: potassium is 15:6:9, after grinding, batching, mixing, granulation, The multi-element compound fertilizer for planting mulberry is obtained by drying and sieving, and the potassium oxide provided by the middle-alkaline tuff ore of the Lower Tertiary Caijiachong Formation in the product is greater than 1%, and the total amount of rare earth is greater than 0.016%.

According to the above-mentioned plan, select the middle-one alkaline tuff ore of the Caijiachong Formation of the Lower Tertiary that contains a variety of trace elements and nitrogen, phosphorus, and potassium fertilizers, and after crushing, grinding, batching, and remixing, put them into the granulation equipment for kneading Grind it into granules, process it in a dryer, and then sieve it to get the finished product.

The advantage of the invention is that the medium-alkaline tuff ore of the Tertiary Caijiachong Formation is used as a carrier for providing various trace elements and rare earth elements. Not only the process of compound fertilizer is simple, the material is convenient, and the cost is low; moreover, the carrier contains many trace elements and sufficient rare earth elements, especially the potassium oxide provided by the carrier is long-acting potassium, which has a good effect on the growth of crops in the middle and late stages. The rare earth elements, zinc, copper, manganese, etc. provided can meet the needs of plant growth; it can avoid radioactive radiation pollution that may occur in the usual spraying of micro-fertilizers. This multi-element compound fertilizer is most suitable for application in acidic soils, reducing the volatilization of ammonia ions in nitrogen fertilizers and improving nitrogen use efficiency. Also because the expansion capacity of the carrier is 2.55 milliliters per gram, and the physical properties of the free expansion rate of 10-32.5%, it has a high fertilizer retention and slow-release effect, and overcomes the disadvantages of soil compaction and poor air permeability that are usually caused by inorganic fertilizers; The ammonia absorption of the carrier itself is 17.93--43.34 mg equivalent/100 g, and the water content is 6.37-8.65, which can improve the water content and water retention effect of the soil. This kind of compound fertilizer integrates the characteristics of nitrogen, phosphorus and potassium compound fertilizer, trace element compound fertilizer and rare earth micro-fertilizer, which can avoid the technical problems in the application of the aforementioned several types of fertilizers and reduce the workload.

Accompanying drawing is the block diagram of production process of the present invention. 1 is the carrier fine crushing process; 2 is the carrier coarse crushing process; 3 is the carrier screening process; 4 is the nitrogen fertilizer selection process; 5 is the potassium fertilizer selection process; 6 is the phosphate fertilizer selection process; 7 is the selected and processed various raw materials Carry out the batching process of mixing evenly; 8 is the granulation process; 9 is the drying process; 10 is the sieving process of the dried semi-finished products, and the fine particles will be returned to the granulation equipment and then granulated; 11 is the bagging of the finished product Library process.

Below in conjunction with accompanying drawing, with regard to the production process of tobacco and mulberry special-purpose compound fertilizer, as two embodiments of the present invention, the scheme of the present invention is described in detail:

With reference to the accompanying drawings, after preparing various raw materials, weigh 2.8 parts of potassium sulfate containing potassium oxide 50%, 1.7 parts of ammonium dihydrogen phosphate containing 46% of phosphorus pentoxide and 18% of nitrogen, and the nitrogen content is 46%. 1.7 parts of urea as a basic fertilizer. Then take some middle-1 alkaline tuff ores of the lower Tertiary Caijiachong Formation as the carrier 3, coarsely crush 2, finely crush 1, and pass through a 150-mesh sieve to process fine materials with a particle size of less than 0.1 mm, and weigh 3.8 parts. Then crush potassium sulfate 5, ammonium dihydrogen phosphate 6, and urea 4 prepared according to the aforementioned ratios to 60 mesh sieves to particles smaller than 0.25mm; Ingredient 7 worked.

Mix the above-mentioned prepared materials with ammonia water (or water); send them into granulation equipment and knead them into granules, and then dry them in an oven at 100°C; if the baking temperature is too high, the loss of nitrogen will also be high . Therefore, it is not suitable to use too high drying temperature. The dried product is sieved 10, and the particles of 1-4 mm are selected as the finished product 11. Those that are too small can be returned to the granulation equipment for further processing.

In this way, the quantitative relationship of nitrogen, phosphorus and potassium in the total composition is basically controlled at 10:8:15, the total amount of rare earth elements provided by the carrier is greater than 0.013%, and the content of long-acting potassium is greater than 1%. It is a multi-element compound fertilizer suitable for planting tobacco in acidic soil.

According to the above method, weigh 2.8 parts of urea, 1.3 parts of ammonium dihydrogen phosphate, 1.6 parts of potassium sulfate, and 4.3 parts of the middle-one alkaline tuff ore of the Caijiachong Formation of the Lower Tertiary system after crushing and sieving various raw materials. , complete the ingredients by mixing evenly. After granulation, drying, and sieving, the 1-4mm particles are taken as finished products, and those that are too fine are returned to the granulation equipment for further processing. That is to say, the quantitative relationship of nitrogen, phosphorus and potassium in the total composition is basically controlled at 15:6:9, the total amount of rare earth provided by the carrier is greater than 0.016%, and the long-acting potassium is greater than 1%, which is a multi-element compound fertilizer suitable for mulberry trees.

The multi-element compound fertilizer produced by the method provided by the invention. Because the medium-1 alkaline tuff ore of the Lower Tertiary Caijiachong Formation is used as a carrier containing various trace elements and rare earth elements, it can not only meet the needs of general plants for trace elements and rare earth elements. Moreover, the physical and chemical properties of the carrier itself can prevent soil compaction. Reduce the current complex process of spraying rare earth micro-fertilizers after applying several kinds of compound fertilizers, which saves labor; the slow-release performance of potassium oxide in the carrier provides potassium elements for the middle and late stages of plant growth, which is the same as quick-acting potassium sulfate. to complementarity.

Claims (3)

1. A method for producing multi-element compound fertilizer, characterized in that by weight, its potassium oxide is greater than 3%, magnesium oxide is greater than 4%, calcium oxide is greater than 3%, rare earth is greater than 0.03%, zinc is greater than 0.02%, and copper is greater than 0.006% %, manganese greater than 0.01% of the lower Tertiary Caijiachong Formation alkaline tuff ore and nitrogen, phosphorus and potassium fertilizers, through grinding, batching, mixing, granulation, drying, and sieving to obtain the product. 2. The manufacturing method of multi-element compound fertilizer according to claim 1, characterized in that the potassium oxide is greater than 3%, the magnesium oxide is greater than 4%, the calcium oxide is greater than 3%, the rare earth is greater than 0.03%, and the zinc is greater than 0.02% by weight. %, copper greater than 0.006%, and manganese greater than 0.01%, the middle-one alkaline tuff ore of the Caijiachong Formation of the Lower Tertiary and nitrogen, phosphorus and potassium fertilizers, wherein the weight ratio of nitrogen: phosphorus: potassium is 10:8:15, after grinding, batching , mixing, granulation, drying, and sieving to obtain multi-element compound fertilizer for tobacco planting, and make the potassium oxide provided by the middle-alkaline tuff ore of the Lower Tertiary Caijiachong Formation in the product greater than 1%, and the total amount of rare earth The amount is greater than 0.013%. 3. The manufacturing method of multi-element compound fertilizer according to claim 1, characterized in that the potassium oxide is greater than 3%, the magnesium oxide is greater than 4%, the calcium oxide is greater than 3%, the rare earth is greater than 0.03%, and the zinc is greater than 0.02% by weight. %, copper greater than 0.006%, and manganese greater than 0.01%, the middle-one alkaline tuff ore of the Caijiachong Formation of the Lower Tertiary and nitrogen, phosphorus and potassium fertilizers, wherein the weight ratio of nitrogen: phosphorus: potassium is 15:6:9, after grinding, batching , mixing, granulation, drying, and sieving to obtain the multi-element compound fertilizer for planting mulberry trees, and make the potassium oxide provided by the middle-alkaline tuff ore of the Lower Tertiary Caijiachong Formation in the product greater than 1%, and the total amount of rare earth The amount is greater than 0.016%.

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