CN111039306A - Preparation method of high-quality lime nitrogen - Google Patents
Preparation method of high-quality lime nitrogen Download PDFInfo
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- CN111039306A CN111039306A CN201911419294.0A CN201911419294A CN111039306A CN 111039306 A CN111039306 A CN 111039306A CN 201911419294 A CN201911419294 A CN 201911419294A CN 111039306 A CN111039306 A CN 111039306A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/16—Cyanamide; Salts thereof
- C01C3/18—Calcium cyanamide
Abstract
The invention discloses a preparation method of high-quality lime nitrogen, which comprises the following steps: s1, crushing and screening; s2, magnetic separation and purification; s3, sorting and purifying according to specific gravity; s4, color sorting and purifying; s5, index detection; s6, designing a formula; s7, automatically batching by a computer; and S8, carrying out calcination reaction on the raw material containing calcium carbide and the raw material of nitrogen in a high-temperature reaction furnace to prepare lime nitrogen. The invention adds three steps of magnetic separation purification, specific gravity separation purification and color separation purification, and gradually removes impurities such as metal, calcium oxide, magnesium oxide, carbon and the like in the raw materials, and the added index detection and formula design are used for realizing computer automatic production service, compared with the traditional manual batching and blending stirring, the invention not only greatly improves the production efficiency, but also greatly improves the index accuracy of finished products and reduces the defective rate.
Description
Technical Field
The invention relates to a preparation method of high-quality lime nitrogen.
Background
Lime nitrogen, a mixture of calcium cyanamide, calcium oxide and other insoluble impurities. It is grey black and has special odor. Is an alkaline fertilizer, is one of the main raw materials of high-efficiency low-toxicity carbendazim pesticide, can be used as herbicide, bactericide, pesticide and the like, and can be used for producing dicyandiamide, melamine, cyanide melt and the like.
In recent years, as the price of the lime nitrogen production raw material is continuously raised and other expenses are increased, the production cost of the lime nitrogen is increased, the development and application of downstream products of the lime nitrogen are in a fatigue state, the development prospect of industrial lime nitrogen is not optimistic, but the agricultural lime nitrogen market is in the starting temperature stage, and the market prospect is good.
The conventional lime nitrogen preparation method is to prepare lime nitrogen by calcining calcium carbide and nitrogen raw materials in a high-temperature reaction furnace. The production process is a simple production flow of crushing, screening and high-temperature reaction of the raw materials, can not remove impurities such as metal, magnesium oxide and the like in the raw materials, the quality of finished products is completely limited by the quality of the raw materials, and if high-grade lime nitrogen is produced, high-quality raw materials with corresponding grades are required to be used.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a preparation method of high-quality lime nitrogen.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a preparation method of high-quality lime nitrogen, which comprises the following steps:
s1, crushing and screening: introducing the large-granularity raw material into a crushing and screening production line, grading the raw material into various smaller granularities, and continuously crushing the raw material in three stages;
s2, magnetic separation and purification, namely, passing the crushed and screened raw materials through a fine ore strong magnetic dry magnetic separation device to remove magnetic metal impurities in the raw materials;
s3, specific gravity separation and purification: the raw material purified in the previous step is subjected to an autonomous specific gravity screening device, and impurities with different specific gravities are removed by utilizing the principle that the specific gravities of the raw material and the impurities are different, so that the quality of the raw material is improved;
s4, color sorting and purifying: the raw materials purified in the last step pass through color sorting and purifying equipment, impurities are further removed according to color difference, and the quality of the raw materials is improved again;
s5, index detection: carrying out index detection on the raw materials purified in the three steps to determine actual component indexes of the purified different raw materials;
s6, formula design: designing a formula according to target requirements, and determining the proportion of different raw materials; the raw materials of the formula are only calcium carbide and fluorite, and nitrogen is dispensed in a small excess amount.
S7, automatic computer batching: inputting various raw material data into an automatic quantitative batching system computer according to the formula, and automatically batching under the control of the computer;
s8, calcining raw materials of calcium carbide, fluorite and nitrogen in a high-temperature reaction furnace to prepare lime nitrogen.
Furthermore, the raw materials are selected from calcium carbide with higher content, appropriate catalyst fluorite and slight excess nitrogen.
The invention has the following beneficial effects:
the invention adds three steps of magnetic separation purification, specific gravity separation purification and color separation purification, and gradually removes impurities such as metal, calcium oxide, magnesium oxide, carbon and the like in the raw materials, and the added index detection and formula design are used for realizing computer automatic production service, compared with the traditional manual batching and blending stirring, the invention not only greatly improves the production efficiency, but also greatly improves the index accuracy of finished products and reduces the defective rate.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
A preparation method of high-quality lime nitrogen comprises the following steps:
s1, crushing and screening: introducing the large-granularity raw material into a crushing and screening production line, grading the raw material into various smaller granularities, and continuously crushing the raw material in three stages;
s2, magnetic separation and purification, namely, passing the crushed and screened raw materials through a fine ore strong magnetic dry magnetic separation device to remove magnetic metal impurities in the raw materials;
s3, specific gravity separation and purification: the raw materials purified in the last step are subjected to an autonomous specific gravity screening device, and impurities with different specific gravities are removed by utilizing the principle that the specific gravities of the raw materials and the impurities are different, so that the quality of the raw materials is improved;
s4, color sorting and purifying: the raw materials purified in the last step pass through color sorting and purifying equipment, impurities are further removed according to color difference, and the quality of the raw materials is improved again;
s5, index detection: carrying out index detection on the raw materials purified in the three steps to determine actual component indexes of the purified different raw materials;
s6, formula design: designing a formula according to target requirements, and determining the proportion of different raw materials; the raw materials of the formula are only calcium carbide and fluorite, and nitrogen is dispensed in a small excess amount.
S7, automatic computer batching: inputting various raw material data into an automatic quantitative batching system computer according to the formula, and automatically batching under the control of the computer;
s8, calcining raw materials of calcium carbide, fluorite and nitrogen in a high-temperature reaction furnace to prepare lime nitrogen.
The raw materials are selected from calcium carbide with higher content, appropriate catalyst fluorite and slight excess nitrogen.
The invention adds three steps of magnetic separation purification, specific gravity separation purification and color separation purification, and gradually removes impurities such as metal, calcium oxide, magnesium oxide, carbon and the like in the raw materials, and the added index detection and formula design are used for realizing computer automatic production service, compared with the traditional manual batching and blending stirring, the invention not only greatly improves the production efficiency, but also greatly improves the index accuracy of finished products and reduces the defective rate.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The preparation method of the high-quality lime nitrogen is characterized by comprising the following steps:
s1, crushing and screening: introducing the large-granularity raw material into a crushing and screening production line, grading the raw material into various smaller granularities, and continuously crushing the raw material in three stages;
s2, magnetic separation and purification, namely, passing the crushed and screened raw materials through a fine ore strong magnetic dry magnetic separation device to remove magnetic metal impurities in the raw materials;
s3, specific gravity separation and purification: the raw materials purified in the last step are subjected to an autonomous specific gravity screening device, and impurities with different specific gravities are removed by utilizing the principle that the specific gravities of the raw materials and the impurities are different, so that the quality of the raw materials is improved;
s4, color sorting and purifying: the raw materials purified in the last step pass through color sorting and purifying equipment, impurities are further removed according to color difference, and the quality of the raw materials is improved again;
s5, index detection: carrying out index detection on the raw materials purified in the three steps to determine actual component indexes of the purified different raw materials;
s6, formula design: designing a formula according to target requirements, and determining the proportion of different raw materials; the raw materials of the formula are only calcium carbide and fluorite, and nitrogen is dispensed in a small excess amount.
S7, automatic computer batching: inputting various raw material data into an automatic quantitative batching system computer according to the formula, and automatically batching under the control of the computer;
s8, calcining raw materials of calcium carbide, fluorite and nitrogen in a high-temperature reaction furnace to prepare lime nitrogen.
2. The method for preparing high-quality lime nitrogen according to claim 1, wherein the raw materials are selected from high-content calcium carbide, a proper catalyst fluorite and a slight excess of nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911419294.0A CN111039306A (en) | 2019-12-31 | 2019-12-31 | Preparation method of high-quality lime nitrogen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911419294.0A CN111039306A (en) | 2019-12-31 | 2019-12-31 | Preparation method of high-quality lime nitrogen |
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| CN111039306A true CN111039306A (en) | 2020-04-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100200405A1 (en) * | 2009-02-09 | 2010-08-12 | Thomas Lenz | Devices, systems and methods for separating magnetic particles |
| CN104437855A (en) * | 2014-11-04 | 2015-03-25 | 无锡市百顺机械厂 | Method for extracting finished iron from iron ore |
| CN104495874A (en) * | 2015-01-06 | 2015-04-08 | 石静红 | Preparation method and application of lime nitrogen |
| CN106892430A (en) * | 2017-04-10 | 2017-06-27 | 南京中燊硅基新材料科技有限公司 | A kind of preparation method of ultrapure quartz sand |
-
2019
- 2019-12-31 CN CN201911419294.0A patent/CN111039306A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100200405A1 (en) * | 2009-02-09 | 2010-08-12 | Thomas Lenz | Devices, systems and methods for separating magnetic particles |
| CN104437855A (en) * | 2014-11-04 | 2015-03-25 | 无锡市百顺机械厂 | Method for extracting finished iron from iron ore |
| CN104495874A (en) * | 2015-01-06 | 2015-04-08 | 石静红 | Preparation method and application of lime nitrogen |
| CN106892430A (en) * | 2017-04-10 | 2017-06-27 | 南京中燊硅基新材料科技有限公司 | A kind of preparation method of ultrapure quartz sand |
Non-Patent Citations (2)
| Title |
|---|
| 戴学玲 等: ""石灰氮生产线自动控制系统及主要控制回路"", 《中国高新技术企业》 * |
| 韩仲琦 等: "《粉体技术词典》", 31 March 1999, 武汉工业大学出版社 * |
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Application publication date: 20200421 |