CN110734288A - 氮化钒的生产加工方法 - Google Patents
氮化钒的生产加工方法 Download PDFInfo
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Abstract
本发明公开了一种氮化钒的生产加工方法,包括如下步骤:a、预还原:将NH4VO3和稀氨水倒入反应釜中,充分搅拌混合均匀制成混合溶液,将混合溶液蒸干水分得到固体,将粉状物料置于回转窑内进行高温处理;b、还原:将经过高温处理后的粉状物料从回转窑内取出与碳粉制成粉料;c、碳化和氮化:将碳粉与粉料进行充分混合,并压型成块状物料,将块状物料微波加热处理,本发明优点是:本氮化钒的生产加工方法以NH4VO3为原料,并通过预还原、还原、碳化和氮化的生产步骤进行生产加工,从而在原料成本较低的前提下,获得了较高纯度的氮化钒,并且可实现连续化生产。
Description
技术领域
本发明涉及冶金的技术领域,更具体地说是涉及氮化钒生产方法的技术领域。
背景技术
钢微合金化已成为高质量钢的重要手段,钒可以作为合金和微合 金加入钢中,对于钢的钒微合金化,主要是靠钒的沉淀析出细化晶粒, 钢中氮的存在,进一步提高这一作用,因为析出物就是钒的碳氮化合 物,钢中直接加入氮化钒将进一步体现钒微合金化对性能的作用优 势,生产还表明,氮化钒比加钒铁节约钒用量,目前常见的氮化钒生产工艺通常是以V2O5或V2O3为原料,然而采用V2O5为原料,虽然原料成本较低,容易采购,但通过V2O5制备得到的氮化钒产品质量不是十分理想,产品纯度较低;采用V2O3为原料制备得到的氮化钒,虽然产品质量和纯度较高,但V2O3原料价格昂贵,不易采购,并且对生产工艺要求苛刻,生产成本高,难以形成连续化生产。
发明内容
本发明的目的就是为了解决上述之不足而提供一种工艺合理,可降低制造成本,提高产品纯度,生产效率高,并可有效保证产品质量的氮化钒的生产加工方法。
本发明为了解决上述技术问题而采用的技术解决方案如下:
氮化钒的生产加工方法,包括如下步骤:
a、预还原:按重量份配比取NH4VO365~72份和质量浓度为25%的稀氨水120~135份,将NH4VO3和稀氨水倒入反应釜中,充分搅拌混合均匀制成混合溶液,并将混合溶液的温度加热至89~92℃,接着,按2.8~3.2L/s的通气速率向混合溶液中通入氨气,按2.1~2.5L/s的通气速率向混合溶液中通入氮气,按3.4~3.7L/s的通气速率向混合溶液中通入氢气,持续通气3.2~3.5小时后,将混合溶液蒸干水分得到固体,并将固体研磨成细度为120~140目的粉状物料,将粉状物料置于回转窑内进行高温处理,并向回转窑内通入充足的氨气、氮气和氢气,氨气、氮气和氢气的体积比为1:(2.2~2.5):(1.8~2),将回转窑内的初始温度控制为680~700℃,并保温1.2~1.8小时,接着利用2~4分钟,将回转窑内的温度升为720~750℃,并保温2.3~2.5小时,再利用3~5分钟,将回转窑内的温度降为640~690℃,并保温3.1~3.4小时,再利用1~3分钟,将回转窑内的温度降为610~630℃,并保温2.8~3小时,最后利用2~4分钟,将回转窑内的温度升为730~760℃,并保温3.5~4.2小时结束;
b、还原:将经过高温处理后的粉状物料从回转窑内取出,按重量份配比取细度为130~150目的碳粉18~24份,将碳粉与经过高温处理后的粉状物料进行充分混合制成粉料,并将粉料送入真空炉内在氮气的气氛下进行高温处理,将真空炉内的真空度控制为120~130pa,将真空炉内的初始温度控制为800~820℃,并保温2.1~2.3小时,接着利用3~5分钟,将真空炉内的温度升为930~960℃,并保温3.4~3.6小时,再利用1~3分钟,将真空炉内的温度升为1100~1200℃,并保温2.5~2.8小时,再利用2~4分钟,将真空炉内的温度降为980~1000℃,并保温3.2~3.5小时,最后利用3~6分钟,将真空炉内的温度降为940~950℃,并保温4.7~5.3小时结束;
c、碳化和氮化:按重量份配比取碳粉16~20份和质量浓度为2%~5%的聚乙烯醇水溶液9~12份,将碳粉与经高温处理后的粉料进行充分混合,再研磨成细度为210~220目的粉末,将粉末与聚乙烯醇水溶液充分搅拌混合均匀,并压型成块状物料,将块状物料送入工业微波炉内并在氮气气氛下进行微波加热处理,将工业微波炉内的真空度控制为140~150pa,利用25~28分钟,将块状物料的温度加热至760~800℃,接着利用29~32分钟,将块状物料的温度升至830~850℃,并保温2.1~2.4小时,再利用36~43分钟,将块状物料的温度升至1200~1300℃,并保温3.8~4.2小时,再利用20~24分钟,将块状物料的温度升至1400~1600℃,并保温4.7~5.3小时,然后利用18~21分钟,将块状物料的温度降至1100~1200℃,并保温2.6~3.4小时,最后利用30~35分钟,将块状物料的温度升至1200~1250℃,并保温6.5~7小时结束,将工业微波炉内的块状物料在常压下冷却至100~120℃即可出炉,得到所需产品,在微波加热过程中,采用频率为30~35kHz、功率为1500~2000W的超声波发生器对工业微波炉内的块状物料进行超声波处理。
在所述微波加热处理过程中,将工业微波炉内的真空度控制为145pa,利用26分钟,将块状物料的温度加热至780℃,接着利用30分钟,将块状物料的温度升至840℃,并保温2.2小时,再利用40分钟,将块状物料的温度升至1250℃,并保温4小时,再利用22分钟,将块状物料的温度升至1500℃,并保温5小时,然后利用20分钟,将块状物料的温度降至1150℃,并保温3小时,最后利用32分钟,将块状物料的温度升至1230℃,并保温6.8小时结束。
本发明采用上述技术解决方案所能达到的有益效果是:本氮化钒的生产加工方法以NH4VO3为原料,并通过预还原、还原、碳化和氮化的生产步骤进行生产加工,从而在原料成本较低的前提下,获得了较高纯度的氮化钒,并且可实现连续化生产。在预还原和还原的过程中,采用变温的加热方式进行高温加热处理,并且该加热温度曲线是根据产品特性精心设计得到,从而大幅提高了制得的氮化钒的纯度。在碳化和氮化过程中,采用微波变温加热的方式,并在微波加热过程中进行超声波处理,从而使制得的氮化钒质量稳定,有效提高了氮化钒的成品品质。
具体实施方式
实施例一:氮化钒的生产加工方法,包括如下步骤:
a、预还原:按重量配比取NH4VO365千克和质量浓度为25%的稀氨水120千克,将NH4VO3和稀氨水倒入反应釜中,充分搅拌混合均匀制成混合溶液,并将混合溶液的温度加热至89℃,接着,按2.8L/s的通气速率向混合溶液中通入氨气,按2.1L/s的通气速率向混合溶液中通入氮气,按3.4L/s的通气速率向混合溶液中通入氢气,持续通气3.2小时后,将混合溶液蒸干水分得到固体,并将固体研磨成细度为120目的粉状物料,将粉状物料置于回转窑内进行高温处理,并向回转窑内通入充足的氨气、氮气和氢气,氨气、氮气和氢气的体积比为1:2.2:1.8,将回转窑内的初始温度控制为680℃,并保温1.2小时,接着利用2分钟,将回转窑内的温度升为720℃,并保温2.3小时,再利用3分钟,将回转窑内的温度降为640℃,并保温3.1小时,再利用1分钟,将回转窑内的温度降为610℃,并保温2.8小时,最后利用2分钟,将回转窑内的温度升为730℃,并保温3.5小时结束;
b、还原:将经过高温处理后的粉状物料从回转窑内取出,按重量配比取细度为130目的碳粉18千克,将碳粉与经过高温处理后的粉状物料进行充分混合制成粉料,并将粉料送入真空炉内在氮气的气氛下进行高温处理,将真空炉内的真空度控制为120pa,将真空炉内的初始温度控制为800℃,并保温2.1小时,接着利用3分钟,将真空炉内的温度升为930℃,并保温3.4小时,再利用1分钟,将真空炉内的温度升为1100℃,并保温2.5小时,再利用2分钟,将真空炉内的温度降为980℃,并保温3.2小时,最后利用3分钟,将真空炉内的温度降为940℃,并保温4.7小时结束;
c、碳化和氮化:按重量配比取碳粉16千克和质量浓度为2%的聚乙烯醇水溶液9千克,将碳粉与经高温处理后的粉料进行充分混合,再研磨成细度为210目的粉末,将粉末与聚乙烯醇水溶液充分搅拌混合均匀,并压型成块状物料,将块状物料送入工业微波炉内并在氮气气氛下进行微波加热处理,将工业微波炉内的真空度控制为140pa,利用25分钟,将块状物料的温度加热至760℃,接着利用29分钟,将块状物料的温度升至830℃,并保温2.1小时,再利用36分钟,将块状物料的温度升至1200℃,并保温3.8小时,再利用20分钟,将块状物料的温度升至1400℃,并保温4.7小时,然后利用18分钟,将块状物料的温度降至1100℃,并保温2.6小时,最后利用30分钟,将块状物料的温度升至1200℃,并保温6.5小时结束,将工业微波炉内的块状物料在常压下冷却至100℃即可出炉,得到所需产品,在微波加热过程中,采用频率为30kHz、功率为1500W的超声波发生器对工业微波炉内的块状物料进行超声波处理。
实施例二:氮化钒的生产加工方法,包括如下步骤:
a、预还原:按重量配比取NH4VO368千克和质量浓度为25%的稀氨水128千克,将NH4VO3和稀氨水倒入反应釜中,充分搅拌混合均匀制成混合溶液,并将混合溶液的温度加热至90℃,接着,按3L/s的通气速率向混合溶液中通入氨气,按2.3L/s的通气速率向混合溶液中通入氮气,按3.6L/s的通气速率向混合溶液中通入氢气,持续通气3.4小时后,将混合溶液蒸干水分得到固体,并将固体研磨成细度为130目的粉状物料,将粉状物料置于回转窑内进行高温处理,并向回转窑内通入充足的氨气、氮气和氢气,氨气、氮气和氢气的体积比为1:2.4:1.9,将回转窑内的初始温度控制为690℃,并保温1.5小时,接着利用3分钟,将回转窑内的温度升为730℃,并保温2.4小时,再利用4分钟,将回转窑内的温度降为670℃,并保温3.2小时,再利用2分钟,将回转窑内的温度降为620℃,并保温2.9小时,最后利用3分钟,将回转窑内的温度升为740℃,并保温3.8小时结束;
b、还原:将经过高温处理后的粉状物料从回转窑内取出,按重量配比取细度为140目的碳粉21千克,将碳粉与经过高温处理后的粉状物料进行充分混合制成粉料,并将粉料送入真空炉内在氮气的气氛下进行高温处理,将真空炉内的真空度控制为125pa,将真空炉内的初始温度控制为810℃,并保温2.2小时,接着利用4分钟,将真空炉内的温度升为940℃,并保温3.5小时,再利用2分钟,将真空炉内的温度升为1150℃,并保温2.6小时,再利用3分钟,将真空炉内的温度降为990℃,并保温3.3小时,最后利用4分钟,将真空炉内的温度降为945℃,并保温5小时结束;
c、碳化和氮化:按重量配比取碳粉18千克和质量浓度为3%的聚乙烯醇水溶液10千克,将碳粉与经高温处理后的粉料进行充分混合,再研磨成细度为215目的粉末,将粉末与聚乙烯醇水溶液充分搅拌混合均匀,并压型成块状物料,将块状物料送入工业微波炉内并在氮气气氛下进行微波加热处理,将工业微波炉内的真空度控制为145pa,利用26分钟,将块状物料的温度加热至780℃,接着利用30分钟,将块状物料的温度升至840℃,并保温2.2小时,再利用40分钟,将块状物料的温度升至1250℃,并保温4小时,再利用22分钟,将块状物料的温度升至1500℃,并保温5小时,然后利用20分钟,将块状物料的温度降至1150℃,并保温3小时,最后利用32分钟,将块状物料的温度升至1230℃,并保温6.8小时结束,将工业微波炉内的块状物料在常压下冷却至110℃即可出炉,得到所需产品,在微波加热过程中,采用频率为33kHz、功率为1800W的超声波发生器对工业微波炉内的块状物料进行超声波处理。
实施例三:氮化钒的生产加工方法,包括如下步骤:
a、预还原:按重量配比取NH4VO372千克和质量浓度为25%的稀氨水135千克,将NH4VO3和稀氨水倒入反应釜中,充分搅拌混合均匀制成混合溶液,并将混合溶液的温度加热至92℃,接着,按3.2L/s的通气速率向混合溶液中通入氨气,按2.5L/s的通气速率向混合溶液中通入氮气,按3.7L/s的通气速率向混合溶液中通入氢气,持续通气3.5小时后,将混合溶液蒸干水分得到固体,并将固体研磨成细度为140目的粉状物料,将粉状物料置于回转窑内进行高温处理,并向回转窑内通入充足的氨气、氮气和氢气,氨气、氮气和氢气的体积比为1:2.5:2,将回转窑内的初始温度控制为700℃,并保温1.8小时,接着利用4分钟,将回转窑内的温度升为750℃,并保温2.5小时,再利用5分钟,将回转窑内的温度降为690℃,并保温3.4小时,再利用3分钟,将回转窑内的温度降为630℃,并保温3小时,最后利用4分钟,将回转窑内的温度升为760℃,并保温4.2小时结束;
b、还原:将经过高温处理后的粉状物料从回转窑内取出,按重量配比取细度为150目的碳粉24千克,将碳粉与经过高温处理后的粉状物料进行充分混合制成粉料,并将粉料送入真空炉内在氮气的气氛下进行高温处理,将真空炉内的真空度控制为130pa,将真空炉内的初始温度控制为820℃,并保温2.3小时,接着利用5分钟,将真空炉内的温度升为960℃,并保温3.6小时,再利用3分钟,将真空炉内的温度升为1200℃,并保温2.8小时,再利用4分钟,将真空炉内的温度降为1000℃,并保温3.5小时,最后利用6分钟,将真空炉内的温度降为950℃,并保温5.3小时结束;
c、碳化和氮化:按重量配比取碳粉20千克和质量浓度为5%的聚乙烯醇水溶液12千克,将碳粉与经高温处理后的粉料进行充分混合,再研磨成细度为220目的粉末,将粉末与聚乙烯醇水溶液充分搅拌混合均匀,并压型成块状物料,将块状物料送入工业微波炉内并在氮气气氛下进行微波加热处理,将工业微波炉内的真空度控制为150pa,利用28分钟,将块状物料的温度加热至800℃,接着利用32分钟,将块状物料的温度升至850℃,并保温2.4小时,再利用43分钟,将块状物料的温度升至1300℃,并保温4.2小时,再利用24分钟,将块状物料的温度升至1600℃,并保温5.3小时,然后利用21分钟,将块状物料的温度降至1200℃,并保温3.4小时,最后利用35分钟,将块状物料的温度升至1250℃,并保温7小时结束,将工业微波炉内的块状物料在常压下冷却至120℃即可出炉,得到所需产品,在微波加热过程中,采用频率为35kHz、功率为2000W的超声波发生器对工业微波炉内的块状物料进行超声波处理。
Claims (2)
1.氮化钒的生产加工方法,其特征在于包括如下步骤:
a、预还原:按重量份配比取NH4VO365~72份和质量浓度为25%的稀氨水120~135份,将NH4VO3和稀氨水倒入反应釜中,充分搅拌混合均匀制成混合溶液,并将混合溶液的温度加热至89~92℃,接着,按2.8~3.2L/s的通气速率向混合溶液中通入氨气,按2.1~2.5L/s的通气速率向混合溶液中通入氮气,按3.4~3.7L/s的通气速率向混合溶液中通入氢气,持续通气3.2~3.5小时后,将混合溶液蒸干水分得到固体,并将固体研磨成细度为120~140目的粉状物料,将粉状物料置于回转窑内进行高温处理,并向回转窑内通入充足的氨气、氮气和氢气,氨气、氮气和氢气的体积比为1:(2.2~2.5):(1.8~2),将回转窑内的初始温度控制为680~700℃,并保温1.2~1.8小时,接着利用2~4分钟,将回转窑内的温度升为720~750℃,并保温2.3~2.5小时,再利用3~5分钟,将回转窑内的温度降为640~690℃,并保温3.1~3.4小时,再利用1~3分钟,将回转窑内的温度降为610~630℃,并保温2.8~3小时,最后利用2~4分钟,将回转窑内的温度升为730~760℃,并保温3.5~4.2小时结束;
b、还原:将经过高温处理后的粉状物料从回转窑内取出,按重量份配比取细度为130~150目的碳粉18~24份,将碳粉与经过高温处理后的粉状物料进行充分混合制成粉料,并将粉料送入真空炉内在氮气的气氛下进行高温处理,将真空炉内的真空度控制为120~130pa,将真空炉内的初始温度控制为800~820℃,并保温2.1~2.3小时,接着利用3~5分钟,将真空炉内的温度升为930~960℃,并保温3.4~3.6小时,再利用1~3分钟,将真空炉内的温度升为1100~1200℃,并保温2.5~2.8小时,再利用2~4分钟,将真空炉内的温度降为980~1000℃,并保温3.2~3.5小时,最后利用3~6分钟,将真空炉内的温度降为940~950℃,并保温4.7~5.3小时结束;
c、碳化和氮化:按重量份配比取碳粉16~20份和质量浓度为2%~5%的聚乙烯醇水溶液9~12份,将碳粉与经高温处理后的粉料进行充分混合,再研磨成细度为210~220目的粉末,将粉末与聚乙烯醇水溶液充分搅拌混合均匀,并压型成块状物料,将块状物料送入工业微波炉内并在氮气气氛下进行微波加热处理,将工业微波炉内的真空度控制为140~150pa,利用25~28分钟,将块状物料的温度加热至760~800℃,接着利用29~32分钟,将块状物料的温度升至830~850℃,并保温2.1~2.4小时,再利用36~43分钟,将块状物料的温度升至1200~1300℃,并保温3.8~4.2小时,再利用20~24分钟,将块状物料的温度升至1400~1600℃,并保温4.7~5.3小时,然后利用18~21分钟,将块状物料的温度降至1100~1200℃,并保温2.6~3.4小时,最后利用30~35分钟,将块状物料的温度升至1200~1250℃,并保温6.5~7小时结束,将工业微波炉内的块状物料在常压下冷却至100~120℃即可出炉,得到所需产品,在微波加热过程中,采用频率为30~35kHz、功率为1500~2000W的超声波发生器对工业微波炉内的块状物料进行超声波处理。
2.根据权利要求1所述的氮化钒的生产加工方法,其特征在于:在所述微波加热处理过程中,将工业微波炉内的真空度控制为145pa,利用26分钟,将块状物料的温度加热至780℃,接着利用30分钟,将块状物料的温度升至840℃,并保温2.2小时,再利用40分钟,将块状物料的温度升至1250℃,并保温4小时,再利用22分钟,将块状物料的温度升至1500℃,并保温5小时,然后利用20分钟,将块状物料的温度降至1150℃,并保温3小时,最后利用32分钟,将块状物料的温度升至1230℃,并保温6.8小时结束。
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