CN103880504A

CN103880504A - Silicon-based compound fertilizer and preparation method thereof

Info

Publication number: CN103880504A
Application number: CN201410084272.4A
Authority: CN
Inventors: 齐绍武; 钟治舜; 张向东; 冯建军
Original assignee: FOSHAN JIANDI AGRICULTURAL TECHNOLOGY Co Ltd
Current assignee: FOSHAN JIANDI AGRICULTURAL TECHNOLOGY Co Ltd
Priority date: 2014-03-07
Filing date: 2014-03-07
Publication date: 2014-06-25

Abstract

The invention provides a silicon-based compound fertilizer which is characterized by being prepared from the following materials in percentage by weight: 40%-70% of SiO2, 4%-8% of K2O4, 15%-25% of MgO and 15%-25% of CaO. The preparation method comprises the following steps: 1, firstly blending potash feldspar, dolomite and coal at a ratio of 1:(0.8-1.2):0.2, then placing the mixture into a grinder together, grinding until the granularity is 180-200 meshes, and then screening, deironing, warehousing and homogenizing; 2, placing a raw material homogenized to be qualified into a kiln, calcining to 1200-1250 DEG C, and then discharging and cooling; 3, grinding a sufficiently cooled clinker until the granularity is 200-250 meshes, screening, deironing, inspecting, packaging, and warehousing. The silicon-based compound fertilizer provided by the invention can be used for reducing the reaction energy, increasing the plant nutrients, finally enhancing the input-output ratio of a product, and the like.

Description

A kind of silica-based composite fertilizer and preparation method thereof

Technical field

The present invention relates to agrochemical field, refer to especially a kind of silica-based composite fertilizer and preparation method thereof.

Background technology

Current citric soluble siliceous fertilizer one is to adopt the industrial tailings superfine pulverizings such as slag, cinder and obtain, the one, as the U.S. in last century the seventies adopt silicon-dioxide to add corallite limestone and in cement kiln, produce siliceous fertilizer in Hawaii, all, because fertilizer efficiency discharges slowly, cause this technical products large-arealy to popularize and to promote.

Summary of the invention

Main purpose of the present invention is to overcome in prior art when the siliceous fertilizer obtaining with industrial tailings superfine pulverizing is only containing calcium metasilicate, fertilizer efficiency is single and need can be absorbed and used by plants through reacting slowly just with the acidic substance in soil, and industrial tailings can be absorbed by crops nutrition less, even likely contain the heavy metal harmful to soil, the same nutrient of product that another sintering process provides is single, cost is high, causes input-output ratio low; Its main purpose of a kind of silica-based composite fertilizer and preparation method thereof is the technique by simple possible, it is the multi-component composite fertilizer that main potassium silicate, Magnesium Silicate q-agent, calcium metasilicate is mixture that cheap price is manufactured a kind of soluble silicon acid group, for the sustainable upgrading increasing both production and income of guaranteeing agricultural makes a due contribution.

The weight percent of its oxide compound composition of a kind of silica-based composite fertilizer is as follows:

Preferably, described SiO ₂content be 50%～60%.

Preferably, described K ₂the content of O is 5%～6%.

Preferably, the content of described MgO is 18%～22%.

Preferably, the content of described CaO is 18%～22%.

A kind of silica-based composite fertilizer preparation method comprises the steps:

Step 1: first by potassium felspar sand (K ₂oAl ₂o ₃6SiO ₂), rhombspar (CaOMgOCO ₂), in about potassium felspar sand: rhombspar: coal=1:(0.8～1.2): 0.2 ratio is prepared burden after then grinding to 180～200 mesh sieve margin is not more than 10% and is entered homogenizing storehouse; Coal, in mark coal, in the time adopting other kind, is converted to mark coal;

Step 2: raw material qualified homogenizing are entered to kiln calcining, and firing temperature is controlled at 1200 DEG C～1250 DEG C, and discharging is cooling; Kiln adopts large-sized rotary kiln or mechanical vertical kiln;

Step 3, cooling grog after is fully entered to abrasive dust be milled to 200～250 orders sieve deironing, inspection, packaging, warehouse-in.

In the present invention, the recipe principle of material is as follows:

1, the introducing of potassium felspar sand not only can provide enough silicon-dioxide for producing silica-based composite fertilizer, also provides plant required potassium simultaneously, particularly low more than 30% than merely producing the energy consumption of this product with silica.

2, the introducing of rhombspar provides calcium, two moderate-elements of magnesium to chemical fertilizer simultaneously, makes the product of producing have the decomposition of carbonic acid gas in better popularity, particularly reaction process, and the sintering character of grog is greatly improved.Meanwhile, the grog obtaining is therefrom loose porous, and grindability obviously improves.

In the present invention, the principle of the each composition weight percent of material is as follows:

1, SiO ₂content be 40%～70%, preferably 50%～60%, work as SiO ₂content more than 70% time, do not have enough calcium, magnesium, ion to react with it, cause potassium felspar sand to decompose, the solubility of potassium and silicon all cannot realize and cause the fertilizer efficiency of product to reduce significantly, works as SiO ₂content while being less than 40%, calcium, magnesium ion content too much consume a large amount of reaction energy, cause potassium content to reduce because silicon reduces simultaneously, thereby have reduced the content of solvable potassium, silicon.

2, K ₂when the content 4%～8% of O, be preferably 5%～6%, due to K ₂o is that potassium felspar sand is introduced, general K-feldspar K ₂o content is all less than 13%, as K in material ₂when O is greater than 8%, the ratio of actual feldspar has exceeded 60%, and 40% rhombspar is not enough to activate potassium ion and silicon ion in feldspar, thereby affects its quality product; Otherwise work as K ₂when O is less than 4%, the proportion of potassium felspar sand in material is less than 30%, thereby causes introducing too much calcium magnesium and fail to bring into play the advantage of product potassium, silicon.

3, the content 15%～25% of CaO, is preferably 18%～22%, because CaO is that rhombspar is introduced, just being varied to of CaO and MgO becomes, and in the time that CaO exceedes 25%, the content of this rhombspar has exceeded 50%, cause potassium felspar sand content to be less than 50%, thereby make reducing at effect potassium, effective silicon of product; In the time that CaO is less than 15%, the content of rhombspar is less than 30%, when the content of potassium felspar sand exceedes 70%, there is no enough calcium, magnesium ion and pasc reaction in material, and potassium felspar sand solvability is significantly reduced, thereby causes product cost to reduce.

4, the content 15%～25% of MgO, is preferably 18%～22%, because magnesium and calcium are that rhombspar is introduced, therefore its same CaO of content mechanism.

In a word, silica-based composite fertilizer of one of the present invention and preparation method thereof and now technology ratio, introduce respectively the elements useful to crop such as silicon, potassium, calcium, magnesium with potassium felspar sand, rhombspar, and not only reaction can be low, and the solubility nutrient substance obtaining is extensive.Reduce significantly production cost, improved to the utmost the cost performance of product simultaneously.

Embodiment

The present invention is further described by the following examples:

Embodiment mono-: potassium felspar sand, rhombspar, coal are pressed to 1:1:0.2 batching, then enter abrasive dust and be milled to 180～200 orders, the deironing of sieving enters homogenizing storehouse; Raw material qualified homogenizing are entered to kiln calcining, and firing temperature is controlled at 1200 DEG C～1250 DEG C; After discharging is fully cooling, enter abrasive dust mill 200～250 orders sieve deironing, inspection, packaging, warehouse-in.

Embodiment bis-:

Potassium felspar sand, rhombspar, coal are prepared burden into mill in the ratio of 1.1:1:0.21, and the order deironing of sieving in grinding to 180～200 enters homogenizing storehouse.Raw material qualified homogenizing are entered to kiln 1200 DEG C～1250 DEG C calcinings, after discharging is fully cooling, enter abrasive dust mill, cross 200～250 mesh sieves, inspection after screening out iron, packaging, warehouse-in.

Can verify by above two embodiment, the present invention makes full use of potassium felspar sand, the rhombspar of extensive distribution and is processed and not only can be obtained the macroelement potassium of China's shortage but also can obtain moderate-element silicon, calcium, magnesium by simple two mill one firing techniques, thereby obtains the silica-based composite fertilizer of sexual valence optimum.

Above embodiment has been described in detail essence of the present invention, but can not limit protection scope of the present invention with this.In every case the simple modifications, modification or the equivalent transformation that do according to the present invention's essence, within all dropping on claim protection domain of the present invention.

Claims

1. a silica-based composite fertilizer, is characterized in that, the weight percent of its material composition is as follows: SiO ₂40%～70%, K ₂o4%～8%, MgO15%～25%, CaO15%～25%.

2. the silica-based composite fertilizer of one according to claim 1, is characterized in that, described SiO ₂content be 40%～70%.

3. the silica-based composite fertilizer of one according to claim 1, is characterized in that, described K ₂the content of O is 4%～8%.

4. the silica-based composite fertilizer of one according to claim 1, is characterized in that, the content of described MgO is 15%～25%.

5. the silica-based composite fertilizer of one according to claim 1, is characterized in that, the content of described CaO is 15%～25%.

6. silica-based composite fertilizer and preparation method thereof, is characterized in that, comprises the steps:

Step 1: jointly enter abrasive dust after first potassium felspar sand, rhombspar, coal being prepared burden in 1:0.8～1.2:0.2 ratio and be milled to 180～200 orders, the deironing of then sieving warehouse-in homogenizing;

Step 2, raw material qualified homogenizing are entered to kiln and are fired to 1200 DEG C～1250 DEG C after discharging cooling;

Step 3, abundant cooled chamotte powder is milled to 200～250 orders sieve deironing, inspection, packaging, warehouse-in.