阅读说明：本技术 一种利用白云质灰岩生产硅钙钾镁肥的方法 (Method for producing silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone ) 是由 于朝旭 奚英洲 朱磊 佟哲磊 崔志刚 张平 刘原野 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种利用白云质灰岩生产硅钙钾镁肥的方法,将白云质灰岩、钾长石、磷石膏等与添加剂Ⅰ和Ⅱ等按比例混合,通过成型、干燥、煅烧、冷却、球磨、造粒等工序,制备成一种利用白云质灰岩生产的矿物质肥。产品中的有效成分不低于85％,其中有效氧化钙大于30％,有效二氧化硅大于21％,有效氧化镁大于7％,有效氧化钾大于5％,并含有多种微量元素。肥料呈弱碱性(pH＝8-12),是一种含有多种元素的矿物质肥料。本发明所使用的生产原料大多为天然矿物质,具有取材方便、成本低廉等优势,产品是一种可以用来调节土壤理化性质、全面提升土壤中中微量元素水平的矿物质肥料,具有较高的使用价值和市场潜力。(The invention discloses a method for producing a silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone, which comprises the steps of mixing the dolomitic limestone, potassium feldspar, phosphogypsum and the like with additives I and II according to a proportion, and preparing a mineral fertilizer produced by utilizing the dolomitic limestone through the working procedures of molding, drying, calcining, cooling, ball milling, granulating and the like. The effective components in the product are not less than 85%, wherein the effective calcium oxide is more than 30%, the effective silicon dioxide is more than 21%, the effective magnesium oxide is more than 7%, the effective potassium oxide is more than 5%, and the product contains various trace elements. The fertilizer is alkalescent (pH 8-12), and is a mineral fertilizer containing multiple elements. Most of production raw materials used in the invention are natural minerals, and the mineral fertilizer has the advantages of convenient material acquisition, low cost and the like, can be used for adjusting the physical and chemical properties of soil and comprehensively improving the level of medium and trace elements in the soil, and has high use value and market potential.)

1. A method for producing a silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone is characterized in that production raw materials are calculated according to mass percent (%), and the production raw materials comprise the following materials:

20-70 parts of dolomite limestone

10-60 parts of potassium feldspar

Phosphogypsum 5-65

Additives I and II 1 to 5

The raw materials are uniformly mixed, and then are subjected to compression molding, drying, calcining, cooling, ball milling and granulation to obtain the silicon-calcium-potassium-magnesium fertilizer produced by utilizing dolomitic limestone, and the silicon-calcium-potassium-magnesium fertilizer is packaged into bags.

2. The method for producing the silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone as claimed in claim 1, wherein the method comprises the following steps: in the additives I and II, the additive I is more than one of sodium sulfate, sodium chloride and sodium carbonate, and the additive II is more than one of borax and ferric oxide.

3. The method for producing the silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone as claimed in claim 1, wherein the method comprises the following steps: the particle size of the production raw materials is below 0.0740mm, namely less than 200 meshes.

4. The method for producing the silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone as claimed in claim 1, wherein the method comprises the following steps: and pressing the powder material into blocks.

5. The method for producing the silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone as claimed in claim 1, wherein the method comprises the following steps: and the drying is to dry the molded block-shaped material until the water content is less than 5 percent.

6. The method for producing the silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone as claimed in claim 1, wherein the method comprises the following steps: the calcination temperature of the calcination activation in the tunnel kiln is 900-1100 ℃, and the calcination time is 1-5 hours.

7. The method for producing the silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone as claimed in claim 1, wherein the method comprises the following steps: and the granulation is to prepare a product subjected to cooling and ball milling into particles with the particle size of about 2-5 mm.

Technical Field

The invention relates to the technical field of agricultural science, in particular to a method for producing a silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone.

Background

The fertilizer is a substance which can provide nutrients required by the growth and development of crops, improve the soil properties and improve the yield and quality of the crops. Is an important production data in agricultural production. Generally, the fertilizer is divided into organic fertilizer, inorganic fertilizer and biological fertilizer. And may be divided into farmyard manure and chemical manure according to the source. Dividing the fertilizer into complete fertilizer and incomplete fertilizer according to the amount of the contained nutrients; according to the characteristics of fertilizer supply, the fertilizer is divided into direct fertilizer and indirect fertilizer; according to the components, the fertilizer is divided into nitrogen fertilizer, potassium fertilizer, trace element fertilizer and rare earth element fertilizer.

In nature, dolomitic limestone is widely distributed, but due to the characteristics of dolomitic limestone, the content of dolomite is 25-50%, and the content of calcium oxide and magnesium oxide limits the application range of dolomitic limestone. It is known that: the soil is a product of rock weathering, and in the soil structure, 50% of the soil consists of soil pores and contains air and moisture; and in the other 50% of the soil solids, minerals account for 45% and organic matter for 5%. These minerals provide the nutrient elements phosphorus, potassium, calcium, magnesium, silicon, sulfur, chlorine, iron and various trace elements required for plant growth, and the content, species and existing form of the nutrient elements directly influence the growth, yield and quality of crops. Particularly for acid soil areas in the south, the mineral nutrient elements cannot be supplemented for a long time, and the mineral nutrient elements in the soil are very deficient due to the leaching effect of acid precipitation on the nutrient elements, crop absorption and other factors. Therefore, the development of weakly alkaline mineral fertilizers which take calcium, magnesium, silicon, sulfur and the like which are deficient in soil as main elements is particularly important under the current large background. The patent is to activate dolomitic limestone to produce a mineral fertilizer which mainly comprises silicon, calcium, potassium and magnesium and has alkalescent characteristics.

Disclosure of Invention

The invention aims to provide a method for producing a silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone, and a mineral fertilizer taking silicon, calcium, potassium and magnesium as main nutritional components is prepared. And has the advantages of low production cost, wide raw material source, large market potential and the like.

In order to achieve the purpose, the invention provides the following technical scheme: a method for producing a silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone comprises the following raw materials in percentage by mass (%):

20-70 parts of dolomite limestone

10-60 parts of potassium feldspar

Phosphogypsum 5-65

Additives I and II 1 to 5

The raw materials are uniformly mixed, and then are subjected to compression molding, drying, calcining, cooling, ball milling and granulation to obtain the silicon-calcium-potassium-magnesium fertilizer produced by utilizing dolomitic limestone, and the silicon-calcium-potassium-magnesium fertilizer is packaged into bags.

Preferably, in the additives I and II, the additive I is more than one of sodium sulfate, sodium chloride and sodium carbonate, and the additive II is more than one of borax and ferric oxide.

Preferably, the particle sizes of the production raw materials are all below 0.0740mm, namely less than 200 meshes.

Preferably, the powder is pressed into blocks.

Preferably, the drying is to dry the molded block-shaped material until the water content is less than 5%.

Preferably, the calcination temperature for calcination and activation in the tunnel kiln is 900-1100 ℃, and the calcination time is 1-5 hours.

Preferably, the granulation is to make the cooled and ball-milled product into a particle size of about 2-5 mm.

Compared with the prior art, the invention has the following beneficial effects:

(1) the production raw materials mainly comprise cheap and easily-obtained natural minerals, and have the advantages of convenient material acquisition and low cost;

(2) the dolomitic limestone and the phosphogypsum are used as main raw materials, so that the economic benefit and the social benefit are better;

(3) compared with the production method of the similar fertilizer, the variety of the production raw materials is reduced, the production cost and the equipment cost are correspondingly reduced, and the cost is further reduced;

(4) the produced mineral fertilizer has complete nutrient elements, is rich in microelements such as iron, zinc, manganese, sulfur, copper, boron and the like besides potassium, calcium, silicon and magnesium, and can achieve balanced fertilization;

(5) the reaction temperature can be reduced from the traditional temperature of 1250 ℃ to the temperature of 900-1100 ℃ for 5 hours by using the special additive, and the calcination time is 1-5 hours, so that the energy consumption in the production process is greatly reduced.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, a method for producing a silicon-calcium-potassium-magnesium fertilizer by using dolomitic limestone comprises the following raw materials in percentage by mass (%):

20-70 parts of dolomite limestone

10-60 parts of potassium feldspar

Phosphogypsum 5-65

Additives I and II 1 to 5

The raw materials are uniformly mixed, and then are subjected to compression molding, drying, calcining, cooling, ball milling and granulation to obtain the silicon-calcium-potassium-magnesium fertilizer produced by utilizing dolomitic limestone, and the silicon-calcium-potassium-magnesium fertilizer is packaged into bags.

In the additives I and II, the additive I is more than one of sodium sulfate, sodium chloride and sodium carbonate, and the additive II is more than one of borax and ferric oxide.

The grain sizes of the production raw materials are below 0.0740mm, namely less than 200 meshes.

Pressing the powder material into blocks.

Drying is to dry the formed block-shaped material until the water content is less than 5 percent.

The calcining temperature for calcining and activating in the tunnel kiln is 900-1100 ℃, and the calcining time is 1-5 hours.

And granulating, namely preparing the cooled and ball-milled product into particles with the particle size of about 2-5 mm.

As shown in figure 1, dolomitic limestone, potassium feldspar, phosphogypsum and the like are mixed with additives I and II according to the mass percentage, the mixture is pressed into blocks and then dried, the water content is dried to be below 5 percent, the blocks are put into a tunnel kiln to be calcined and activated, the calcining temperature is controlled to be 900-fold and 1100 ℃, the calcining time is 1 to 5 hours, and the activated block products are cooled, ball-milled, granulated and the like to prepare the mineral fertilizer produced by the dolomitic limestone and packaged into bags.

Example one

A method for producing silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone comprises the following materials in proportion: 20% of dolomitic limestone, 45% of potassium feldspar and 35% of phosphogypsum, wherein the additive I is sodium chloride and sodium sulfate, the addition amount is 3%, and the additive II is borax, the addition amount is 2%. The process flow comprises the steps of uniformly mixing materials according to a ratio, pressing the mixed materials into blocks, drying the blocks, drying until the water content is less than 5%, and then feeding the blocks into a tunnel kiln for calcination at 900 ℃ for 180 min. The activated and calcined blocky product is cooled, ball-milled, granulated and the like to prepare the mineral fertilizer produced by utilizing dolomitic limestone.

Example two

A method for producing silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone comprises the following materials in proportion: 45% of dolomitic limestone, 30% of potassium feldspar and 25% of phosphogypsum, wherein the additive I is sodium chloride and sodium carbonate, the addition amount is 4%, and the additive II is ferric oxide, and the addition amount is 2%. The process flow comprises the steps of uniformly mixing materials according to a ratio, pressing the mixed materials into blocks, drying the blocks, drying until the water content is less than 5%, and then feeding the blocks into a tunnel kiln for calcination at the calcination temperature of 1000 ℃ for 120 min. The activated and calcined blocky product is cooled, ball-milled, granulated and the like to prepare the mineral fertilizer produced by utilizing dolomitic limestone.

EXAMPLE III

A method for producing silicon-calcium-potassium-magnesium fertilizer by utilizing dolomitic limestone comprises the following materials in proportion: 35% of dolomitic limestone, 35% of potassium feldspar and 30% of phosphogypsum, wherein the additive I is sodium sulfate and sodium carbonate, the addition amount is 2.5%, and the additive II is ferric oxide, the addition amount is 2%. The process flow comprises the steps of uniformly mixing materials according to a ratio, pressing the mixed materials into blocks, drying the blocks, drying until the water content is less than 5%, and then feeding the blocks into a tunnel kiln for calcination at the temperature of 1100 ℃ for 80 min. The activated and calcined blocky product is cooled, ball-milled, granulated and the like to prepare the mineral fertilizer produced by utilizing dolomitic limestone.

Example of the implementation

The Liaoning company adopts the process to produce the fertilizer, and the mixture ratio of the materials is as follows: 55% of dolomitic limestone, 25% of potassium feldspar and 20% of phosphogypsum, wherein the additive I is sodium chloride and sodium carbonate, the addition amount is 2%, and the additive II is ferric oxide, and the addition amount is 1.5%. The process flow comprises the steps of uniformly mixing materials according to a ratio, pressing the mixed materials into blocks, drying the blocks, drying until the water content is less than 5%, and then feeding the blocks into a tunnel kiln for calcination at 1050 ℃ for 60 min. The activated and calcined blocky product is cooled, ball-milled, granulated and the like to prepare the mineral fertilizer produced by utilizing dolomitic limestone. And the following information can be obtained through the detection of a third party: the effective components in the product reach 92%, wherein the effective calcium oxide is more than 30%, the effective silicon dioxide is more than 21%, the effective magnesium oxide is more than 7%, the effective potassium oxide is more than 5%, and the product contains various trace elements. The fertilizer is alkalescent (pH 8-12), and is a mineral fertilizer containing multiple elements.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.