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And first, I have to reply to the older charges and to my first accusers, and then I will go on to the later ones. For of old I have had many accusers, who have accused me falsely to you during many years; and I am more afraid of them than of Anytus and his associates, who are dangerous, too, in their own way. But far more dangerous are the others, who began when you were children, and took possession of your minds with their falsehoods, telling of one Socrates, a wise man, who speculated about the heaven above, and searched into the earth beneath, and made the worse appear the better cause. The disseminators of this tale are the accusers whom I dread; for their hearers are apt to fancy that such inquirers do not believe in the existence of the gods. And they are many, and their charges against me are of ancient date, and they were made by them in the days when you were more impressionable than you are now, in childhood, or it may have been in youth , and the cause when heard went by default, for there was none to answer. And hardest of all, I do not know and cannot tell the names of my accusers; unless in the chance case of a Comic poet. 1 All who from envy and malice have persuaded you, some of them having first convinced themselves, all this class of men are most difficult to deal with; for I cannot have them up here, and cross-examine them, and therefore I must simply fight with shadows in my own defense, and argue when there is no one who answers. I will ask you then to assume with me, as I was saying, that my opponents are of two kinds; one recent, the other ancient: and I hope that you will see the propriety of my answering the latter first, for these accusations you heard long before the others, and much oftener. C Bj
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- 产品展示
- 钾冰晶石_钾基冰晶石
- 氟铝酸钾
- 砂轮专用氟铝酸钾
- 铝添加剂用钾冰晶石
- 钠冰晶石_钠基冰晶石
- 氟铝酸钠
- 再生冰晶石
- 熔剂用冰晶石
- 氟化铝
- 三氟化铝
- 硼氟酸钾
- 氟钛酸钾
- 氟硅酸钠
- 氯化钾
- 氟化钠
- 氟化钠溶液
- 氟化钠防腐剂
- 氟化钠ph（ph数值大小）
- 氟化钠甘油糊（氟化钠甘油糊有毒么）
- 氟化钠生产（怎么生产氟化钠）
- 氟化钠的性质（氟化钠可以用来做什么）
- 氢氟化钠（氢氟化钠怎么储存）
- 氟化钠质量（氟化钠是什么）
- 硅氟化钠（硅氟化钠是什么）
- 氟化钠溶解度（氟化钠溶解度是多少）
- 氟化钠结晶（氟化钠结晶是什么）
- 氟化钠抑制剂（氟化钠抑制剂是什么）
- 氟化钠水溶液（氟化钠水溶液是什么颜色的）
- 钾冰晶石（钾冰晶石的用途）
- 冰晶石钾（钾冰晶石）
- 桓台钾冰晶石（冰晶石钾）
- 钾冰晶石英文（钾冰晶石）
- 钾冰晶石熔点（钾冰晶石的熔点）
- 钾冰晶石的性能（钾冰晶石的用途）
- 钾冰晶石型闪烁晶体（钾冰晶石的用途）
- 砂轮用钾冰晶石（冰晶石在树脂砂轮中的作用）
- 湖南钾冰晶石（湖南钾冰）
- 钾冰晶石细粉（钾冰晶石）
- 钾冰晶石多少度升华（氟铝酸钾冰晶石）
- 焦作钾冰晶石（钾冰晶石）
- 钾冰晶石性质（钾冰晶石性能）
- 氟铝酸钾是冰晶石吗（钾冰晶石是氟铝酸钾么）
- 钾冰晶石是什么（什么是钾冰晶石）
- 钾冰晶石指标（冰晶石的理化指标）
- 钾冰晶石?规格（钾冰晶石有什么规格）
- 钾冰晶石的含量（钾冰晶石的用途）
- 钾冰晶石规格（钾冰晶石规格型号）
- 钾冰晶石和氟铝酸钾的区别（钾冰晶石和氟铝酸钾有什么区别）
- 钾冰晶石粉（钾冰晶石）
- 钾冰晶石灰色和白色区别（钾冰晶石白色和灰色的区别）
- 钾冰晶石粉末（钾冰晶石粉）
- 钾冰晶石图片（钾冰晶石）
- 氟化物合成钾冰晶石（钾冰晶石）
- 钾冰晶石的熔点是多少（钾冰晶石熔点）
- 冰晶石钾中文名称是什么（钾冰晶石另外叫什么）
- 进口超细钾冰晶石（超细钾冰晶石）
- 钾冰晶石微粉（钾冰晶石粉末）
- 钾冰晶石?加热（钾冰晶石熔点）
- 钾冰晶石砂轮（砂轮用钾冰晶石）
- 钾冰晶石密度（钾冰晶石的密度是多少）
- 砂轮钾冰晶石（砂轮用钾冰晶石）
- 电镀为什么用钾冰晶石（钾冰晶石作用）
- 钾冰晶石的cas（什么是钾冰晶石）
- 钾冰晶石砂状（砂状钾冰晶石）
- 氟铝酸钾冰晶石（钾冰晶石氟铝酸钾）
- 钾冰晶石电解铝用（电解铝用钾冰晶石）
- 什么是钾冰晶石（钾冰晶石是什么）
- 钾冰晶石?钠冰晶石?区别（钾冰晶石和钠冰晶石的区别）
- 钾长冰晶石粉（钾冰晶石粉）
- 钾冰晶石粉的作用（钾冰晶石粉的作用与用途）
- 钾冰晶石晶胞（钾冰晶石晶体）
- 氟铝酸钾（氟铝酸钾是啥）
- 六氟铝酸钾（六氟铝酸钾是什么）
- 四氟铝酸钾（四氟铝酸钾是什么）
- 氟铝酸钾熔点（氟铝酸钾熔点是多少）
- 氟铝酸钾钠（氟铝酸钾）
- 五氟铝酸钾（氟铝酸钾）
- 氟铝酸钾维基（氟铝酸钾）
- 氟铝酸钾高温（氟铝酸钾）
- 六氟铝酸钾 6.1类（六氟铝酸钾）
- 铝钛硼 氟铝酸钾（氟铝酸钾）
- 5氟铝酸钾分子式（5氟铝酸钾分子式是什么）
- 氟铝酸钾和氟硼酸钾哪个好（氟铝酸钾和氟硼酸钾的区别）
- 氟铝酸钾的导电铝（氟铝酸钾的导电率）
- 四氟铝酸钾制备四氟铝酸钾（四氟铝酸钾制备）
- 白钾 氟铝酸钾（氟铝酸钾白钾）
- 氟铝酸钾吸热（吸热氟铝酸钾）
- 氟铝酸钾与氟化聚酰亚胺（氟铝酸钾）
- 氟铝酸钾熔点是多少（氟铝酸钾熔点）
- 氟铝酸钾高温分解吗（氟铝酸钾高温分解）
- 氟铝酸钾熔化（氟铝酸钾高温熔化）
- 氟铝酸钾钎剂 al(oh)（氟铝酸钾钎剂）
- 氟铝酸钾铝电解（氟铝酸钾电解铝）
- 氟铝酸钠（氟铝酸钠是什么）
- 六氟铝酸钠（六氟铝酸钠是什么）
- 六氟合铝酸钠（六氟合铝酸钠是什么）
- 氟化铝钠（钠冰晶石）
- 四氟铝酸钠（氟铝酸钠）
- 铝氟酸钠（氟铝酸钠）
氟铝酸铵法生产氟铝酸钠生产厂家
氟铝酸铵法是一种具有中国自主知识产权的生产冰晶石的专利技术。该方法以铝型材行业废渣———氟铝酸铵为原料, 和烧碱反应可直接获得高分子比冰晶石。副产物氨气经水或稀氢氟酸吸收后可套用于氟硅酸钠法流程中。该法优点是以氟铝酸铵代替氢氟酸和氢氧化铝, 既保护了中国有限的萤石和铝土矿资源,又减轻了环境污染,是一种具有发展前途的技术方法。
电解铝行业回收法是一种经过过筛 、浮选 、过滤、干燥等一系列物理方法回收冰晶石的方法。电解铝行业在生产过程中产生含氟废渣, 约含30%(质量分数 )的冰晶石、1%(质量分数 )的氧化铝、1%(质量分数)的氧化钙, 其余为炭粒、石墨碳素、碳化铝和硅铁氧化物等杂质,以此为原料,浮选后可回收部分冰晶石。该法优点在于氟资源得到了循环利用,节约了国家宝贵的萤石资源;缺点是浮选后冰晶石主含量低 、杂质含量高。
含氟废气法是一种通过回收焙烧球团铁矿含氟烟气来合成冰晶石的方法:含氟废气(HF,SiF4)先用水吸收制得氢氟酸和氟硅酸混合液, 再将氢氧化铝和碳酸钠与混合液反应生成氟化钠和氟化铝 ,最后通过氟化钠和氟化铝相互反应合成冰晶石。该方法除氟效率在97%左右, 冰晶 石产品可达到GB4291—2007冰晶石的要求。在上述生产工艺中, 酸法是世界各国广泛使用的方法,也是传统经典工艺。磷肥副产法是目前世界各国重点发展的生产工艺。（zc）详解冰晶石生产的各种工艺方法 冰晶石即氟铝酸钠，分子式为Na3AlF6。冰晶石性能优良，不仅是炼铝行业不可或缺的助溶剂，同时也被冰晶石自然界产出稀少，通常人工制造。 冰晶石在铝工业中的用量最大，世界上每年的消耗量约钾冰晶石熔盐对惰性阳极和侧衬材料的腐蚀也比较严重，需要进一步寻找合适的惰性阳极和侧衬材料。钾冰晶石电解质存在的问题之一是电导率较低，从而产生较大的欧姆降。虽然可以通过添加LiF等添加剂。
- 22-12-13 六氟合铝酸钠与碱反应（六氟合铝酸钠会与碱反应吗）
- 22-12-13 六氟合铝酸钠中加氨水（六氟合铝酸钠中加氨水反应什么）
- 22-12-13 六氟合铝酸钠中心离子（六氟合铝酸钠的中心离子）
- 22-12-12 六氟铝酸钠与氨水反应（六氟铝酸钠和氨水反应）
- 22-12-12 有关六氟铝酸钠的化学方程式（六氟铝酸钠的化学方程式）
- 22-12-12 六氟铝酸钠碰到皮肤（六氟铝酸钠接触到皮肤）
- 22-12-06 工业制取四氟铝酸钠（制取四氟铝酸钠）
- 22-12-06 氟铝酸钠 硫酸铝（氟铝酸钠和硫酸铝）
钾冰晶石（氟铝酸钾）、冰晶石（氟铝酸钠）用途：铝合金添加剂、电解铝助溶剂、树脂砂轮填充剂、铝合金焊接钎焊剂、铸造行业脱氧剂等。