CN104495874A - Preparation method and application of lime nitrogen - Google Patents
Preparation method and application of lime nitrogen Download PDFInfo
- Publication number
- CN104495874A CN104495874A CN201510004958.2A CN201510004958A CN104495874A CN 104495874 A CN104495874 A CN 104495874A CN 201510004958 A CN201510004958 A CN 201510004958A CN 104495874 A CN104495874 A CN 104495874A
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- furnace
- nitrogen
- calcium carbide
- lime nitrogen
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/002—Synthesis of metal cyanides or metal cyanamides from elementary nitrogen and carbides
Abstract
The invention provides a preparation method and application of lime nitrogen. The preparation method comprises the following steps: after crushing calcium carbide in a crushing machine, grinding calcium carbide into fine powder, and crushing fine-powdery calcium carbide, fluorite and circulated lime nitrogen into powder smaller than 100mm, and lifting the powder to a magnet separator by virtue of a lifting machine, so as to remove iron impurities; then crushing the powder to be smaller than 20mm by virtue of a hammer crusher, and lifting to the powder into a calcium carbide storage hopper by virtue of a lifting machine; feeding the powder into a ball mill, milling the powder to be capable of passing a 80mesh sieve, and feeding the powder into a furnace material storage hopper; when the temperature of a settling furnace is higher than 800 DEG C, feeding furnace materials into the settling furnace, supplying pure nitrogen into the settling furnace, heating the furnace materials to be 500-600 DEG C, and carrying out nitridation, wherein the nitridation temperature is maintained at 1000-1100 DEG C, and the nitrogen pressure is 0.6kPa-0.8kPa; when the temperature of the settling furnace is lower than 800 DEG C, stopping feeding, and feeding after the temperature rises. According to the preparation method, the product quality can be improved, the production cost can be lowered, and wasting of resources can be reduced.
Description
Technical field
The present invention relates to a kind of preparation method and its usage of lime nitrogen.
Background technology
Lime nitrogen, also known as calcium cyanamide, is the raw material of manufacture order cyanamide, Dyhard RU 100, sulphur gland and derosal, can makes metal heat treatmet agent and sweetening agent in iron and steel operation, agriculturally can make base manure.The consumption that current China lime nitrogen is used for cyanamide, Dyhard RU 100 is produced accounts for 60% of lime nitrogen aggregate consumption, the consumption produced for thiocarbamide, derosal accounts for about 35% of lime nitrogen aggregate consumption, and the consumption for agriculture field only accounts for about 5% of lime nitrogen aggregate consumption.
In recent years along with lime nitrogen raw materials for production price constantly raises up and other fees increase, lime nitrogen production cost is caused to improve, and the Application and Development of lime nitrogen derived product is weak situation, the development prospect of industrial lime nitrogen is not too optimistic, but agricultural lime nitrogen market is in out thermophase, market outlook are had an optimistic view of.In recent years along with the intensification in urban greening project and home flower market, lime nitrogen application is agriculturally more and more extensive.At present, comparatively large to the demand of lime nitrogen in the world, particularly Japan, Taiwan, agricultural lime nitrogen is in great demand.
Carbon element is the general designation of carbon and graphite material.Carbon and graphite material is the nonmetal solid material based on carbon, wherein the material that is substantially made up of non-graphite matter carbon of carbon material, and graphite material is then the material be substantially made up of graphite carbon.Carbon material is broadly divided into graphite-made category, carbon goods class and extraordinary carbon materials (carbon element novel material) three major types according to production technology characteristic and product performance.Along with extraordinary carbon materials production cost significantly reduces, from the eighties, extraordinary carbon materials, except showing up prominently at more high-technology fields, has started to replace traditional material in a large number, has expanded to civil area.Main products is Graphite Electrodes, electrical carbon, carbon brick, carbon paste, carbon fiber etc.Wherein, the production that electrode paste is widely used in the ore-smelting furnaces such as calcium carbide, ferrosilicon, ferrochrome, nickel metallurgy and yellow phosphorus is smelted, and is the electro-conductive material that furnace equipment such as supply furnace of calcium carbide, ferroalloy furnace etc. uses.
In recent years, due to world market crude oil price Continued, PVC industry is shifted from traditional " petroleum law " to " calcium carbide route ", calcium carbide consumption is constantly increased, country's calcium carbide industry policy adjusts thereupon, calcium carbide processing industry progressively makes the transition to scale economics, recycling economy and environmental protection and economy, the wide market of carbon element industry, especially Novel carbon material is worldwide just in the ascendant, be real Chaoyang industry, carbon materials likely develops into the fourth-largest class material of Material Field.
Summary of the invention
In view of background technology Problems existing, the object of the present invention is to provide a kind of preparation method and its usage of lime nitrogen, it can improve the quality of products, and reduces production cost, reduces the wasting of resources.
In order to realize object of the present invention, in first of the present invention, the invention provides a kind of preparation method and its usage of lime nitrogen, it comprises step: by calcium carbide in jaw crusher after fragmentation, then smalls is worn into through tubular type masher, by the calcium carbide of smalls state, fluorite and melt down lime nitrogen and be crushed to below 100mm; By the calcium carbide of below 100mm, fluorite and melt down lime nitrogen through chapelet to magnetic separator, magnetic separator is adopted to be separated, ferrosilicon wherein to remove iron contamination; By the calcium carbide be separated through ferrosilicon, fluorite and melt down lime nitrogen and be crushed to below 20mm through hammer mill, then adopt chapelet in calcium carbide hopper; It is sent into furnace charge ball mill through disk feeder, levigate to 80 mesh sieves, enter in furnace charge hopper through chapelet, worm conveyor; When sedimentation furnace furnace temperature is higher than 800 DEG C, furnace charge is evenly sprinkled in sedimentation furnace through revolution spreading mouth by furnace charge hopper, and adds pure nitrogen in stove, and nitrogen is preheated to 500-600 DEG C through sedimentation furnace, enter conversion zone fully to contact with furnace charge, and carry out nitrogenizing reaction on furnace charge surface; Temperature of reaction remains on 1000-1100 DEG C, and nitrogen pressure is 0.6-0.8kPa; When furnace temperature is reinforced lower than stopping when 800 DEG C, treat that chemical reaction proceeds, temperature is fed in raw material after raising again; After completing nitrogenizing reaction and through nitrogen cooling, then adopt pneumatic pick impact be finished product.
In order to realize object of the present invention, in second of the present invention, the invention provides a kind of purposes of lime nitrogen, it can be used as fertilizer and for improveing soil.
By above technical scheme, beneficial effect of the present invention is as follows:
The method can be improved the quality of products, and reduces production cost, reduces the wasting of resources.
Embodiment
Be further described the specific embodiment of the present invention below in conjunction with embodiment, advantage and disadvantage of the present invention will be more clear along with description.But these embodiments are only exemplary, do not form any restriction to scope of the present invention.
The preparation method of a kind of lime nitrogen according to a first aspect of the present invention, it comprises step: calcium carbide after fragmentation, is then worn into smalls through tubular type masher in jaw crusher, by the calcium carbide of smalls state, fluorite and melt down lime nitrogen and be crushed to below 100mm; By the calcium carbide of below 100mm, fluorite and melt down lime nitrogen through chapelet to magnetic separator, magnetic separator is adopted to be separated, ferrosilicon wherein to remove iron contamination; By the calcium carbide be separated through ferrosilicon, fluorite and melt down lime nitrogen and be crushed to below 20mm through hammer mill, then adopt chapelet in calcium carbide hopper; It is sent into furnace charge ball mill through disk feeder, levigate to 80 mesh sieves, enter in furnace charge hopper through chapelet, worm conveyor; When sedimentation furnace furnace temperature is higher than 800 DEG C, furnace charge is evenly sprinkled in sedimentation furnace through revolution spreading mouth by furnace charge hopper, and adds pure nitrogen in stove, and nitrogen is preheated to 500-600 DEG C through sedimentation furnace, enter conversion zone fully to contact with furnace charge, and carry out nitrogenizing reaction on furnace charge surface; Temperature of reaction remains on 1000-1100 DEG C, and nitrogen pressure is 0.6-0.8kPa; When furnace temperature is reinforced lower than stopping when 800 DEG C, treat that chemical reaction proceeds, temperature is fed in raw material after raising again; After completing nitrogenizing reaction and through nitrogen cooling, then adopt pneumatic pick impact be finished product.
Wherein, when manufacturing lime nitrogen, very tight to the purity requirement of nitrogen.If when the content of Oxygen in Nitrogen increases, then nitrogenize is protected interior consumed electrode and is also increased, and can make carbon element alkane in calcium cyanamide to the greatest extent.In the nitrogen as lime nitrogen raw material, the content of oxygen thus must not more than 0.2%, and moisture must not more than 0.05g/m3.The purity of nitrogen should at more than 99.8-99.9%.The content of argon must not more than 0.03%, because argon can make the nitrogenize of calcium carbide slow.
Wherein, the preparation method of lime nitrogen also comprises step and the lime nitrogen finished product hit through pneumatic pick is crushed to below 25-40mm through jaw crusher, then through finished ball grinding machine, is levigately no more than 3.5% to 30 screen residues.
The purposes of a kind of lime nitrogen according to a second aspect of the present invention, it can be used for can be used as fertilizer and for improveing soil.
Lime nitrogen is a kind of water-fast fertilizer, and the nitrogen contained by it needs repeatedly to be hydrolyzed, and just can become the nitrogen nutrition that plant can absorb, and therefore it is a kind of Slowly release nitrogen fertilizer, and its fertilizer effectiveness is sustainable reaches 3-4 month.In addition, lime nitrogen, containing the calcium of more than 38%, can meet the demand to calcium in plant-growth, particularly have significant effect to calciphilous plant.
Lime nitrogen is a kind of alkaline fertilizer, can prevent soil acidification.Lime nitrogen can also slowly release Dyhard RU 100 in soil water solution preocess, and Dyhard RU 100 is a kind of nitrification inhibitor, can suppress NH
4 +be converted into NO
3-speed, thus reduce NO
3-generation, prevent unnecessary NH in soil
4 +loss, protection water source; Improve the utilization ratio of nitrogenous fertilizer simultaneously, reduce the content of nitric nitrogen in vegetables, realize the object of social development and environment protection doulbe-sides' victory.
Utilize the heat that sun direct irradiation produces, in conjunction with the heat discharged in liming solution heat release in lime nitrogen and organic substance decomposing process, under sealing condition, ground temperature can rise to 40-50 DEG C, the highlyest can reach 60-70 DEG C; This situation continues 20-30 days, can play good soil disinfection effect.In addition, lime nitrogen hydrolysis intermediate product cyanamide and Dyhard RU 100 have the effect suppressing and kill various pests and microorganism.
Different from other chemical fertilizer, lime nitrogen is its slow as fertilizer, can be steady in a long-term provide nitrogen nutrition to crop, the bad and underproduction of plant growth can not be caused because of de-fertilizer or produce salinification because soil salt accumulation, plant growth can be made so healthy and strong, and output increases.Lime nitrogen has obvious effect of increasing production to various crop, and cucumber, watermelon, strawberry and tomato increase production 14.7%, 13.3%, 11.7% and 7.0% respectively; Intermediate product in its decomposition course can suppress the generation of multiple disease and pest, decreases usage quantity and the residual quantity of agricultural chemicals, has ensured the security of food.Lime nitrogen can meet the crop interior demand to calcium element whole breeding time, can prevent the physiological disease that crop causes because of calcium deficiency, improve the quality of crop.Lime nitrogen adds compound fertilizer can make cash crop and upland grain volume increase more than 10%, increasing production of rice 5-10%.Reach more than 95% to the prevention effect of the Cruciferae club root of vegetables, Chinese cabbage can increase production 33-42%.The comparable urea of singly executing of lime nitrogen interpolation urea makes vegetable increase production 5-15% simultaneously.This new technology is that the application of agricultural lime nitrogen opens new field.
It will be understood by those skilled in the art that and can modify to the details of technical solution of the present invention and form or replace down without departing from the spirit and scope of the present invention, but these amendments and replacement all fall within the scope of protection of the present invention.
Claims (3)
1. a preparation method for lime nitrogen, comprises step:
Calcium carbide after fragmentation, is then worn into smalls through tubular type masher in jaw crusher, by the calcium carbide of smalls state, fluorite and melt down lime nitrogen and be crushed to below 100mm;
By the calcium carbide of below 100mm, fluorite and melt down lime nitrogen through chapelet to magnetic separator, magnetic separator is adopted to be separated, ferrosilicon wherein to remove iron contamination;
By the calcium carbide be separated through ferrosilicon, fluorite and melt down lime nitrogen and be crushed to below 20mm through hammer mill, then adopt chapelet in calcium carbide hopper;
It is sent into furnace charge ball mill through disk feeder, levigate to 80 mesh sieves, enter in furnace charge hopper through chapelet, worm conveyor;
When sedimentation furnace furnace temperature is higher than 800 DEG C, furnace charge is evenly sprinkled in sedimentation furnace through revolution spreading mouth by furnace charge hopper, and adds pure nitrogen in stove, and nitrogen is preheated to 500-600 DEG C through sedimentation furnace, enter conversion zone fully to contact with furnace charge, and carry out nitrogenizing reaction on furnace charge surface;
Temperature of reaction remains on 1000-1100 DEG C, and nitrogen pressure is 0.6-0.8kPa;
When furnace temperature is reinforced lower than stopping when 800 DEG C, treat that chemical reaction proceeds, temperature is fed in raw material after raising again;
After completing nitrogenizing reaction and through nitrogen cooling, then adopt pneumatic pick impact be finished product.
2. the preparation method of a kind of lime nitrogen according to claim 1, also comprises step:
The lime nitrogen finished product hit through pneumatic pick is crushed to below 25-40mm through jaw crusher, then through finished ball grinding machine, is levigately no more than 3.5% to 30 screen residues.
3. the lime nitrogen prepared according to claim 1 can be used as fertilizer and for improveing soil.
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| CN201510004958.2A CN104495874A (en) | 2015-01-06 | 2015-01-06 | Preparation method and application of lime nitrogen |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104798583A (en) * | 2015-04-24 | 2015-07-29 | 莆田市东盛现代农业有限公司 | Repair planting method after abnormal death of southern open field autumn tomatoes |
| CN105016359A (en) * | 2015-08-05 | 2015-11-04 | 平罗县祥美化工有限公司 | Granular lime nitrogen capable of quickly releasing fertilizer effect and production technology thereof |
| CN105217655A (en) * | 2015-10-12 | 2016-01-06 | 贝利特化学股份有限公司 | A kind of production method of calcium cyanamide and device |
| CN106316117A (en) * | 2016-08-18 | 2017-01-11 | 福建省农业科学院土壤肥料研究所 | Slow-release glass fertilizer and industrialized production method thereof |
| CN108557842A (en) * | 2018-04-16 | 2018-09-21 | 平罗县祥美化工有限公司 | The dustless production technology and its equipment of high product lime nitrogen |
| CN108569929A (en) * | 2018-05-15 | 2018-09-25 | 平罗县祥美化工有限公司 | Nitriding furnace roof material distributing method and its equipment for the production of lime nitrogen multifunctional fertilizer |
| CN108821800A (en) * | 2018-04-15 | 2018-11-16 | 平罗县祥美化工有限公司 | The multifunctional fertilizer production technology and its equipment of anti-sticking wall |
| CN108892154A (en) * | 2018-06-25 | 2018-11-27 | 山东益丰生化环保股份有限公司 | A method of cyanamide yield is improved using ultrasonic disperse device |
| CN111039306A (en) * | 2019-12-31 | 2020-04-21 | 石嘴山市鹏盛化工有限公司 | Preparation method of high-quality lime nitrogen |
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| US4849197A (en) * | 1987-02-18 | 1989-07-18 | Skw Trostberg Aktiengesellschaft | Process for the preparation of calcium cyanamide |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104798583A (en) * | 2015-04-24 | 2015-07-29 | 莆田市东盛现代农业有限公司 | Repair planting method after abnormal death of southern open field autumn tomatoes |
| CN105016359A (en) * | 2015-08-05 | 2015-11-04 | 平罗县祥美化工有限公司 | Granular lime nitrogen capable of quickly releasing fertilizer effect and production technology thereof |
| CN105217655A (en) * | 2015-10-12 | 2016-01-06 | 贝利特化学股份有限公司 | A kind of production method of calcium cyanamide and device |
| CN106316117A (en) * | 2016-08-18 | 2017-01-11 | 福建省农业科学院土壤肥料研究所 | Slow-release glass fertilizer and industrialized production method thereof |
| CN106316117B (en) * | 2016-08-18 | 2019-04-26 | 福建省农业科学院土壤肥料研究所 | A kind of slow-release glass fertilizer and its industrialized preparing process |
| CN108821800A (en) * | 2018-04-15 | 2018-11-16 | 平罗县祥美化工有限公司 | The multifunctional fertilizer production technology and its equipment of anti-sticking wall |
| CN108821800B (en) * | 2018-04-15 | 2021-10-26 | 平罗县祥美化工有限公司 | Production process and equipment of multifunctional fertilizer capable of preventing wall adhesion |
| CN108557842A (en) * | 2018-04-16 | 2018-09-21 | 平罗县祥美化工有限公司 | The dustless production technology and its equipment of high product lime nitrogen |
| CN108569929A (en) * | 2018-05-15 | 2018-09-25 | 平罗县祥美化工有限公司 | Nitriding furnace roof material distributing method and its equipment for the production of lime nitrogen multifunctional fertilizer |
| CN108892154A (en) * | 2018-06-25 | 2018-11-27 | 山东益丰生化环保股份有限公司 | A method of cyanamide yield is improved using ultrasonic disperse device |
| CN108892154B (en) * | 2018-06-25 | 2020-05-26 | 山东益丰生化环保股份有限公司 | Method for improving yield of cyanamide by using ultrasonic dispersion device |
| CN111039306A (en) * | 2019-12-31 | 2020-04-21 | 石嘴山市鹏盛化工有限公司 | Preparation method of high-quality lime nitrogen |
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Inventor after: Zhao Zhiguo Inventor after: Shi Jinghong Inventor before: Shi Jinghong |
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Effective date of registration: 20160614 Address after: 012400 the Inner Mongolia Autonomous Region Chayouhouqi Hangzhou Ningda Levin Industrial Park Applicant after: Inner Mongolia Guohong carbon Chemical Co., Ltd. Address before: 100074 No. 511, big grey factory village, Beijing, Fengtai District Applicant before: Shi Jinghong |
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Application publication date: 20150408 |