阅读说明：本技术 锂云母废料化肥及制备方法 (Lepidolite waste fertilizer and preparation method thereof ) 是由 魏绪春 魏东东 廖新 于 2019-11-04 设计创作，主要内容包括：本发明公开一种锂云母废料化肥及制备方法,其中,锂云母废料化肥制备方法包括：取锂云母焙烧浸注渣和磷酸钙,焙烧生成基体；将生产的基体粉碎；将获得粉末溶于水中形成液态物质,过滤,取滤液；将获得的滤液,重结晶,制成所述锂云母废料化肥。本发明通过将锂云母焙烧浸注渣与磷酸钙焙烧,从而生成磷酸钾、磷酸钠的有效物质,有利于作物生长；锂云母焙烧浸注渣含有钾元素、钙元素、铝元素和铁元素可得到利用,制成锂云母废料化肥；通过将锂云母焙烧浸注渣烧结,从而可利用锂云母焙烧浸注渣,废物利用的同时保护环境。(The invention discloses a lepidolite waste fertilizer and a preparation method thereof, wherein the preparation method of the lepidolite waste fertilizer comprises the following steps: roasting the lepidolite leaching residue and the calcium phosphate to generate a matrix; crushing the produced matrix; dissolving the obtained powder in water to form a liquid substance, and filtering to obtain a filtrate; and recrystallizing the obtained filtrate to prepare the lepidolite waste fertilizer. According to the invention, lepidolite roasting leaching residues and calcium phosphate are roasted to generate effective substances of potassium phosphate and sodium phosphate, which is beneficial to crop growth; the lepidolite roasting leaching residue containing potassium element, calcium element, aluminum element and iron element can be utilized to prepare lepidolite waste fertilizer; through sintering the lepidolite roasting infusion slag, the lepidolite roasting infusion slag can be utilized, waste is utilized, and the environment is protected.)

1. A preparation method of lepidolite waste fertilizer is characterized by comprising the following steps:

step one, roasting lepidolite leaching slag and calcium phosphate to generate a matrix;

step two, crushing the substrate produced in the step one;

dissolving the powder obtained in the step two in water to form a liquid substance, and filtering to obtain a filtrate;

step four, recrystallizing the filtrate obtained in the step three to prepare the lepidolite waste fertilizer.

2. The method for preparing lepidolite waste fertilizer of claim 1, wherein step one comprises:

and (2) taking 50-70 parts by mass of lepidolite roasting impregnation slag and 30-50 parts by mass of calcium phosphate, and roasting at the roasting temperature of 1100-1300 ℃ to generate the matrix.

3. The method for preparing lepidolite waste fertilizer as defined in claim 1, wherein step two comprises:

and (3) crushing the matrix produced in the step one, and sieving the crushed matrix with a sieve mesh number of 80-120 meshes.

4. The method for preparing lepidolite waste fertilizer as claimed in claim 1, wherein in the lepidolite roasting leaching residue, SiO is present₂Greater than 50% of Al₂O₃Greater than 5%, K₂O is greater than 3%, Na₂O is more than 5 percent.

5. The method for preparing lepidolite waste fertilizer of claim 1, wherein step four comprises:

adding KOH into the filtrate obtained in the third step to adjust the pH value to be 6.0-7.0, recrystallizing and drying;

adding biological stimulin, and mixing to obtain the lepidolite waste fertilizer.

6. The method for preparing lepidolite waste fertilizer as claimed in claim 5, wherein the biological stimulin is one or more of humic acid, amino acid and alginic acid.

7. The method for preparing lepidolite waste fertilizer of claim 5, wherein step four comprises:

recrystallizing the filtrate obtained in the third step to obtain a crystal;

and uniformly mixing 70-85 parts by mass of the crystal, 5-15 parts by mass of citric acid powder, 5-15 parts by mass of sodium bicarbonate and 0.5-2 parts by mass of an adhesive, and pressing into a tablet to prepare the lepidolite waste fertilizer.

8. A lepidolite waste fertilizer produced by the method of producing a lepidolite waste fertilizer of any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of fertilizer manufacturing, in particular to a lepidolite waste fertilizer and a preparation method thereof.

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. The fertilizer is divided into nitrogen fertilizer, potassium fertilizer, trace element fertilizer and rare earth element fertilizer according to the components. The existing fertilizer is usually prepared by compounding extracted pure substances.

Lepidolite is also known as lepidolite, a monoclinic system. Often in the form of a collection of fine scale shapes. Pale purple, and sometimes yellow-green. Glass gloss. Lepidolite is mostly used for refining lithium carbonate, and a large amount of industrial waste residues are generated in the refining process, cannot be effectively utilized, and greatly harm the environment.

Therefore, there is a need to provide a new lepidolite waste fertilizer to solve the above technical problems.

Disclosure of Invention

The invention mainly aims to provide a lepidolite waste fertilizer and a preparation method thereof, and aims to solve the technical problem that the lepidolite roasting leaching residue cannot be effectively utilized.

In order to achieve the purpose, the preparation method of the lepidolite waste fertilizer provided by the invention comprises the following steps:

step one, roasting lepidolite leaching slag and calcium phosphate to generate a matrix;

step two, crushing the substrate produced in the step one;

step three, dissolving the powder obtained in the step two in water to form a liquid substance, filtering, and taking a filtrate;

step four, recrystallizing the filtrate obtained in the step three to prepare the lepidolite waste fertilizer.

Preferably, the first step includes:

and (2) taking 50-70 parts by mass of lepidolite roasting impregnation slag and 30-50 parts by mass of calcium phosphate, and roasting at the roasting temperature of 1100-1300 ℃ to generate the matrix.

Preferably, the second step includes:

and (3) crushing the matrix produced in the step one, and sieving the crushed matrix with a sieve mesh number of 80-120 meshes.

Preferably, SiO in the lepidolite roasting impregnation slag₂Greater than 50% of Al₂O₃Greater than 5%, K₂O is greater than 3%, Na₂O is more than 5 percent.

Preferably, step four comprises:

adding KOH into the filtrate obtained in the third step to adjust the pH value to 6.0-7.0, recrystallizing and drying;

adding biological stimulin, and mixing to obtain the lepidolite waste fertilizer.

Preferably, the biological stimulin is one or more of humic acid, amino acid and alginic acid.

Preferably, the fourth step includes:

recrystallizing the filtrate obtained in the third step to obtain a crystal;

and (3) uniformly mixing 70-85 parts by mass of the crystal prepared in the fourth step, 5-15 parts by mass of citric acid powder, 5-15 parts by mass of sodium bicarbonate and 0.5-2 parts by mass of an adhesive, and pressing into a tablet to prepare the lepidolite waste fertilizer.

The invention also provides a lepidolite waste fertilizer prepared by the preparation method of the lepidolite waste fertilizer.

In the invention, the lepidolite roasting leaching residue and the calcium phosphate are roasted to generate effective substances of the potassium phosphate and the sodium phosphate, which is beneficial to the growth of crops; the lepidolite roasting leaching residue containing potassium element, calcium element, aluminum element and iron element can be utilized to prepare lepidolite waste fertilizer; through sintering the lepidolite roasting infusion slag, the lepidolite roasting infusion slag can be utilized, waste is utilized, and the environment is protected.

Drawings

FIG. 1 is a schematic flow chart of a method for preparing a lepidolite waste fertilizer according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

The invention provides a preparation method of a lepidolite waste fertilizer, which comprises the following steps:

step S1, roasting the lepidolite leaching residue and the calcium phosphate to generate a matrix;

specifically, 50-70 parts by mass of lepidolite roasting infusion slag and 30-50 parts by mass of calcium phosphate are taken, and the base body is roasted at the roasting temperature of 1100-1300 ℃.

Lepidolite having a chemical formula of K ((Li)_2-xAl_1+x(Al_2xSi_4-2xO₁₀)(F，OH)₂) And) is a layered silicate mineral. In the general lithium extraction process, lepidolite and sulfate are mixed and then roasted at high temperature, metal ions in the sulfate are replaced by lithium ions through high-temperature ion replacement to form soluble lithium sulfate, and the soluble lithium sulfate is leached by water or dilute acid and then filtered to leave filtrate. Rubidium and cesium elements in the lepidolite remain in the slag. Li is contained in the lepidolite roasting impregnation slag₂O、SiO₂、Na₂O、Al₂O₃、2K₂O、SO₃、Fe₂O₃And the like, and potassium phosphate, sodium phosphate and other beneficial substances for crops are produced after the calcium phosphate is roasted. In this example, SiO is present in the lepidolite roasting infusion slag₂Greater than 50% of Al₂O₃Greater than 5%, K₂O is greater than 3%, Na₂O is more than 5 percent.

The appropriate rubidium in the lepidolite roasting leaching residue can increase the leaf area, increase the dry matter quantity, improve the chlorophyll content, improve the sugar content, reduce the acid content and the like for plants.

Step S2, crushing the substrate produced in the step S1;

specifically, the matrix produced in step S1 is crushed, sieved, and the mesh number is 80 to 120 meshes.

Step S3, dissolving the powder obtained in the step S2 in water to form a liquid substance, and filtering to obtain filtrate;

specifically, the powder obtained in step S2 is dissolved in water to form a liquid substance, and the liquid substance is filtered to obtain a filtrate. Due to SiO₂Calcining with calcium phosphate to form calcium silicate and aluminum silicate, wherein the calcium silicate and the aluminum silicate are insoluble in water, thereby filtering out the calcium silicate and the aluminum silicate.

And S4, recrystallizing the filtrate obtained in the step S3 to prepare the lepidolite waste fertilizer.

Step S4 includes:

recrystallizing the filtrate obtained in the step S3 to obtain a crystal;

specifically, adding KOH into the filtrate obtained in the step S3 to adjust the pH value to 6.0-7.0, recrystallizing and drying; and biological stimulin can also be added and mixed to prepare the lepidolite waste fertilizer. The biological stimulator is one or more of humic acid, amino acid and alginic acid. The biological stimulin is a composite component, can be humic acid, amino acid, alginic acid and the like, and can compensate the phenomenon that the synthesis of the amino acid is limited or weakened due to environmental influence of plants. Compared with hormone, the biological stimulator has the advantages of large dosage, stable effect and long effective period.

And uniformly mixing 70-85 parts by mass of the crystal, 5-15 parts by mass of citric acid powder, 5-15 parts by mass of sodium bicarbonate and 0.5-2 parts by mass of an adhesive, and pressing into a tablet to prepare the lepidolite waste fertilizer.

And (4) uniformly mixing 70-85 parts by mass of the crystal obtained in the step S4, 5-15 parts by mass of citric acid powder, 5-15 parts by mass of sodium bicarbonate and 0.5-2 parts by mass of an adhesive, and pressing into tablets. The dried sheet is convenient to package and transport, and the arm of a user cannot be polluted when the sheet is used, and the sheet cannot fly into the air to be inhaled into the respiratory tract of the user; the water-soluble fertilizer effervescent tablets are put into water, and carbon dioxide is generated after the citric acid powder and the sodium bicarbonate are subjected to acid-base reaction, so that on one hand, more carbon sources are provided for crops, and on the other hand, the rising process of the carbon dioxide accelerates the mixing of the solution; citric acid can chelate with divalent and trivalent metal ions in the microelement composition, thereby improving fertility; the citric acid does not contain elements such as nitrogen, phosphorus and the like, has good biodegradability and is not easy to harden soil.

In the invention, the lepidolite roasting leaching residue and the calcium phosphate are roasted to generate effective substances of the potassium phosphate and the sodium phosphate, which is beneficial to the growth of crops; the lepidolite roasting leaching residue containing potassium element, calcium element, aluminum element and iron element can be utilized to prepare lepidolite waste fertilizer; through sintering the lepidolite roasting infusion slag, the lepidolite roasting infusion slag can be utilized, waste is utilized, and the environment is protected.

The lepidolite waste fertilizer provided by the invention is particularly suitable for planting soil remediation plants such as Indian shepherd's purse, alternanthera philoxeroides, polygonum hydropiper, water hyacinth, willow, poplar, sunflower, sedum alfredii hance and the like.

The lepidolite waste fertilizer provided by the invention is specifically described by the following specific examples, wherein the lepidolite roasting infusion slag is collected from the new county of liworth in the west of the river, and the lepidolite roasting infusion slag comprises the following components:

	％		％
				Li2O	0.2	Cs2O	0.005
SiO2	68	Na2O	5
				Al2O3	8	Rb2O	2
K2O	2	SO3	3
				Fe2O3	0.3