CN101012138B - Method for preparing compound trace element fertilizer by using waste zinc-manganese battery - Google Patents
Method for preparing compound trace element fertilizer by using waste zinc-manganese battery Download PDFInfo
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- CN101012138B CN101012138B CN2006101253597A CN200610125359A CN101012138B CN 101012138 B CN101012138 B CN 101012138B CN 2006101253597 A CN2006101253597 A CN 2006101253597A CN 200610125359 A CN200610125359 A CN 200610125359A CN 101012138 B CN101012138 B CN 101012138B
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Abstract
A method for preparing a compound trace element fertilizer by using waste zinc-manganese batteries comprises the following preparation process steps: (1) elution of soluble salts; (2) reducing and roasting filter residues; (3) acid hydrolysis neutralization; and (4) filtering and evaporating. The invention has the advantages that: the effective components in the industrial waste are fully utilized, the method of treating waste with waste is adopted, waste is changed into valuable, harm is changed into benefit, pollution is eliminated, production cost is reduced, product competitiveness is enhanced, and the method has high economic benefit and social benefit.
Description
Technical Field
The invention relates to a method for preparing a compound trace element fertilizer by using waste zinc-manganese batteries.
Background
The zinc-manganese battery is the most common primary battery, is convenient to use and wide in application, and is a battery with large production and sales volume. The waste zinc-manganese battery contains heavy metals such as mercury, cadmium, zinc, copper, manganese and the like, and if the waste zinc-manganese battery is discarded at will, the environment is polluted, and the waste of metal resources is also caused. Related literature reports that 11 million tons of manganese, 7 million tons of zinc and 1.4 million tons of copper can be regenerated if the waste zinc-manganese battery can be completely recycled, so that the waste zinc-manganese battery is a considerable resource. With the enhancement of environmental awareness of people, the treatment of waste batteries has attracted extensive attention, and particularly, the harmless treatment and comprehensive utilization of the waste batteries are more and more important. At present, the waste batteries are treated by fire method in foreign countries, and the waste batteries are treated by recovery and burying methods in China, so that secondary pollution is easily caused. The trace elements are essential nutrients for plant growth and are long-acting composite trace element fertilizer suitable for various kinds of soil. The reasonable application of the trace element fertilizer can obtain high-yield and high-quality agricultural products, so the development of the trace element fertilizer is faster, and particularly, the demand of the compound trace element fertilizer containing manganese, zinc, boron, magnesium, copper, iron, molybdenum and the like is more and more. On the other hand, the raw materials for producing trace element fertilizer, such as copper, zinc, etc., are expensive and relatively important nonferrous metals. This affects the development of trace element fertilizers to varying degrees. If the waste batteries with rich sources are adopted to produce the compound trace element fertilizer, the requirements of people on high-quality crops are met, the reutilization of the waste batteries of solid wastes is promoted, the environmental pollution is reduced to a certain extent, and the compound trace element fertilizer has high application value.
Disclosure of Invention
The invention aims to provide a method for preparing a compound trace element fertilizer by using waste zinc-manganese batteries, which adopts waste batteries with rich sources to produce the compound trace elements, thereby not only meeting the requirements of people on high-quality crops, but also promoting the reutilization of solid waste batteries.
The invention is realized by the following steps:
(1) Elution of soluble salts: collecting the crushed waste batteries into a reaction tank, adding water according to a solid-to-liquid ratio of 1: 2-5, stirring and dissolving for 1 hour to ensure that ammonium chloride and manganese chloride are basically dissolved, then clarifying and filtering, placing filtrate into a container, and transferring filter residues to the next step for heating treatment.
(2) Reducing and roasting filter residues: the filter residue is sent into a roasting furnace for roasting, the temperature of the furnace is controlled to be 500-600 ℃, and the furnace is heated for 2-5 hours;
(3) Acid hydrolysis neutralization: and (3) concentrating the copper cap, the unreacted zinc sheet and the substance obtained by heating in the step (2) into an acid-resistant reaction tank. Gradually processing industrial sulfuric acid and a small amount of dilute nitric acid, continuously stirring, and controlling the pH value to be less than 2. After the indissolvable substances are completely dissolved, the pH value of the solution is adjusted to 5-6 by utilizing the leftover of borax production, namely boron-magnesium mud;
(4) Filtering and evaporating: and (3) filtering the solution obtained in the step (3), filtering again, discarding insoluble substances, transferring the filtrate and the filtrate obtained in the step (1) into an evaporator for heating, evaporating and concentrating until a layer of crystals appear on the liquid surface, stirring and heating by using a small fire, stopping heating when only a small amount of liquid remains in a container, cooling, taking out, drying and mixing with a proper amount of calcium magnesium phosphate fertilizer.
The compound trace element fertilizer prepared by the process has basically better physical and chemical properties and contains a plurality of main trace elements required by common crops. The product is reddish powdery substance, and comprises the following main components:
the zinc sulfate accounts for about 40 percent, and the copper sulfate accounts for 1 percent
Manganese sulfate is about 30% and ferric sulfate is 3%
The boric fertilizer accounts for 2 percent and the ammonium chloride accounts for 6 percent
18 percent of calcium magnesium phosphate fertilizer
The invention has the advantages that: the effective components in the industrial waste are fully utilized, and a method of treating waste by waste is adopted to change waste into valuable and turn harm into benefit. Not only eliminates pollution, but also reduces production cost and enhances the competitiveness of products. Has higher economic benefit and social benefit.
Claims (1)
1. A method for preparing a compound trace element fertilizer by using waste zinc-manganese batteries comprises the following preparation process steps:
(1) Elution of soluble salts: collecting the crushed waste batteries into a reaction tank, adding water according to a solid-to-liquid ratio of 1: 2-5, stirring, dissolving for 1 hour to dissolve zinc chloride, ammonium chloride and manganese chloride, clarifying and filtering, placing the filtrate into a container, and transferring the filter residue to the next step for heating treatment;
(2) Reducing and roasting filter residues: the filter residue is sent into a roasting furnace for roasting, the temperature of the furnace is controlled to be 500-600 ℃, and the furnace is heated for 2 hours;
(3) Acid hydrolysis neutralization: concentrating the copper cap, the unreacted zinc sheet and the substance prepared by heating in the step 2 into an acid-resistant reaction tank, continuously stirring the process industry sulfuric acid and a small amount of dilute nitric acid, controlling the pH value to be less than 2, and adjusting the pH value of the solution to 5-6 by using the boron-magnesium mud which is the leftovers of borax production after the indissoluble substances are completely dissolved;
(4) Filtering and evaporating: filtering the solution obtained in the step 3, removing insoluble substances, transferring the filtrate and the filtrate obtained in the step 1 into an evaporator for heating, evaporating and concentrating until a layer of crystals appear on the liquid surface, stirring and heating by using a small fire, stopping heating when only a small amount of liquid remains in a container, cooling, taking out, drying and mixing with a calcium-magnesium-phosphate fertilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101253597A CN101012138B (en) | 2006-12-04 | 2006-12-04 | Method for preparing compound trace element fertilizer by using waste zinc-manganese battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101253597A CN101012138B (en) | 2006-12-04 | 2006-12-04 | Method for preparing compound trace element fertilizer by using waste zinc-manganese battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101012138A CN101012138A (en) | 2007-08-08 |
| CN101012138B true CN101012138B (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101253597A Expired - Fee Related CN101012138B (en) | 2006-12-04 | 2006-12-04 | Method for preparing compound trace element fertilizer by using waste zinc-manganese battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN101012138B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201700713D0 (en) * | 2017-01-16 | 2017-03-01 | Elemental Digest Ltd | Nutrient composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121909A (en) * | 1994-10-22 | 1996-05-08 | 张值 | Organic mixed farm chemical contg. fertilizer and production method thereof |
| CN1868933A (en) * | 2006-06-09 | 2006-11-29 | 浙江大学 | Method of biomass resources circulating utilization |
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2006
- 2006-12-04 CN CN2006101253597A patent/CN101012138B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121909A (en) * | 1994-10-22 | 1996-05-08 | 张值 | Organic mixed farm chemical contg. fertilizer and production method thereof |
| CN1868933A (en) * | 2006-06-09 | 2006-11-29 | 浙江大学 | Method of biomass resources circulating utilization |
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| Publication number | Publication date |
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| CN101012138A (en) | 2007-08-08 |
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Granted publication date: 20110615 Termination date: 20131204 |