1) vanadium harm
钒危害
2) harm
[英][hɑ:m] [美][hɑrm]
危害
1.
Hazard and Prevention of Harmful Biological Invasion;
有害生物入侵的危害及防治措施
2.
Brief discussion on characters,harm and prevention of nitrogen trichloride;
浅谈三氯化氮的性质、危害及预防
3.
High Building Fire Mist Harm and Control;
高层建筑中发生火灾时烟气的危害及控制
3) hazard
危害
1.
The hazard and exposure assessment of DEHP in food contact materials;
食品包装材料中DEHP的危害及其在食品中的暴露评估
2.
Hazards of Pb Pollution to Health;
重金属铅污染对人体的危害
3.
Study on hazards of raw milk and control measures;
原料乳危害及控制措施研究
4) hazards
[英]['hæzəd] [美]['hæzɚd]
危害
1.
Analysis and Evaluation of the Occupational Hazards Situation in a Coke Plant;
包头市某焦化厂职业病危害现状分析与评价
2.
The Air Pollutant Hazards Inside Long Distance Bus and Prevention Measures;
长途客车内空气污染的危害与防治措施
3.
Extortion of confessions by torture and its hazards;
对刑讯逼供及其危害的思考
5) damage
[英]['dæmɪdʒ] [美]['dæmɪdʒ]
危害
1.
Damages of Biological Invasion to Agriculture in China and Management;
生物入侵对中国农业的危害及对策
2.
Analysis the Damage and Resources Recovery Towards Electronic Waste;
分析电子垃圾的危害及资源化
3.
Analysis on health damage in benzene-exposed environment and relevant supervision effect in a shoe-making factory;
制鞋厂苯作业环境健康危害和干预效果分析
6) Harmfulness
[英]['hɑ:mfulnis] [美]['hɑrmfəlnɪs]
危害
1.
Harmfulness of Static Electricity and its Protection during the Process of NF_3 Production;
NF_3生产中静电的危害及其防护
2.
Proliferation Mechanism and Harmfulness of Nuclear and Radiation Accidents;
核及放射性突发事件扩散机制与危害影响研究
3.
Endocrine Disrupting Chemicals from Pesticides and Their Harmfulness to Environment;
农药类环境荷尔蒙物质及其危害
补充资料：钒磷铁矿提钒
钒磷铁矿提钒
extraction of vanadium from the bear vanadium phosphosiderite
和94％。fantintiekuang tifan钒磷铁矿提钒(extraetion of vanadium frombear vanadium phosphosiderite)以含钒磷铁矿为原料制取五氧化二钒的帆提取方法。主要包括钠化焙烧和湿法漫出两道作业。直接用作提饥原料的是含饥磷铁。 含钒磷铁是饥磷铁矿电炉生产单质磷和磷肥的副产品。钒磷铁矿分布在美国爱达荷、蒙大拿、怀俄明、犹他等州，含Pz05 24%~32%、V:O。0.267%~0.625%和少量的铬、镍和钥等。美国克尔麦吉(Kerr-MeGee)化学公司所用的含钒磷铁含饥3.26%~5 .2%、磷24.7%~26.6%、铁59.9%一68.5%、铬3.4%一5.7%、镍。.84%~1%。先将含钒磷铁磨至粒度小于。.42mm，配入1.4倍纯碱和。.1倍的食盐在回转窑中于1043~lo63K温度下焙烧，钒便转变成水溶性的钠盐。熔烧块在加热到沸腾的水中浸出，钒、铬、磷均溶入浸出液。浸出浆液经过滤处理。滤液冷却结晶析出磷酸钠晶体，用离心机分离。晶体中如仍含有钒和铬，可用水重溶后再结晶分离，直到获得合格的磷酸钠(NaaPO;)晶体产品。若Na3PO‘结晶母液含磷高于0. 989/L时则要加入CaclZ，使其生成磷酸钙沉淀，然后水解回收钒。随后往母液中加入硝酸铅，沉淀出铬酸铅。此工艺的钒、铬和磷的回收率分别为85%、65%
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条