【产品介绍】
坩埚是化学仪器的重要组成部分，它是熔化和精炼金属液体以及固液加热、反应的容器，是保证化学反应顺利进行的基础。
坩埚的型号规格较多，在应用时不受生产规模、批量大小和熔炼物质品种的限制，可任意选择，适用性较强，并可保证被熔炼物质的纯度。
【产品分类】
坩埚可分为石墨坩埚、粘土坩埚和金属坩埚三大类。
石墨坩埚的主体原料，是结晶形天然石墨。故它保持着天然石墨原有的各种理化特性。
石墨坩埚具有良好的热导性和耐高温性，在高温使用过程中，热膨胀系数小，对急热、急冷具有一定抗应变性能。对酸，碱性溶液的抗腐蚀性较强，具有优良的化学稳定性。
石墨坩埚，因具有以上优良的性能，所以在冶金、铸造、机械、化工等工业部门，被广泛用于合金工具钢的冶炼和有色金属及其合金的熔炼。并有着较好的技术经济效果。
金坩埚
金也是贵金属，耐腐蚀性很强，但因其熔点较低(1063℃)，限制了它的使用范围。熔融的碱金属氢氧化物对金不侵蚀，做这种熔融用金坩埚较好。
注意:金在高温煤气灯上加热会熔化(绝不可使黄金接触王水)
银坩埚
银比金价廉，它也不受氢氧化钾或钠的侵蚀，在熔融状态下仅在接近空气的边缘略起作用。但银的熔点为960℃，不能在火上直接加热，银加热后表面生成一层氧化银，氧化银在高温下不稳定，在200℃以下稳定。银易与硫作用生成硫化银，不可在银坩埚中分解和灼烧含硫的物质，不许使用碱性硫化熔剂。熔融状态时铝、锌、锡、铅、汞等金属盐都能使银坩埚变脆。银坩埚不可用于熔融硼砂，浸取熔融物时不可使用酸，特别是不可接触浓酸，银坩埚的质量经灼烧会变化，故不适于沉淀的称量。
【产品用途】
(1)灼烧固体物质
(2)溶液的蒸发、浓缩或结晶(如果有蒸发皿，应该选择蒸发皿。当然坩埚也可以用于溶液的蒸发、浓缩或结晶)。
【注意事项】
(1)可直接受热，加热后不能骤冷，用坩埚钳取下
(2)坩埚受热时放在泥三角上
(3)蒸发时要搅拌;将近蒸干时用余热蒸干
(4)用后放置干燥处，切忌雨水侵入;使用前须缓慢烘烤到500摄氏度方可使用。
(5)应根据坩埚容量加料，忌挤得太紧，以免金属发生热膨胀胀裂坩埚。
(6)取出金属熔液时，最好用勺子舀出，尽量少用卡钳，若用卡钳等工具应与坩埚形状相符，避免局部受力过大而缩短使用寿命。
(7)坩埚使用寿命与用法有关，应避免强氧化火焰直接喷射到坩埚上，而使坩埚原料氧化短命。
坩埚的生产原料，可概括为三大类型。一是结晶质的天然石墨，二是可塑性的耐火黏土，三是经过煅烧的硬质高岭土类骨架熟料。从2008年开始，开始采用耐高温的合成材料，如:碳化硅、氧化铝金刚砂及硅铁等做坩埚的骨架熟料。这种熟料对提高坩埚产品质量，增强坩埚密度和机械强度有着显著效果。
【联系方式】
公司名称：温县绿洋耐材磨料有限公司
联系人：张怡琳
QQ:3433577985
电话：18236872210
工厂地址： 河南温县古温工业区
【厂家介绍】
温县绿洋耐材紧靠陇海铁路、连霍高速、310国道纵贯东西境内耐火材料矿产资源极为丰富、质优量大、燃料充足，为发展耐火材料工业提供了得天独厚的条件，是生产耐火材料的优质基地。我厂主要生产不定型耐火材料，棕刚玉.金刚砂 白刚玉 黑刚玉 莫来石 尖晶石 耐火砖 耐火球 铝矾土、细粉、高铝骨料、高铝细粉、浇注料、钢包料、捣打料、铁钩捣打料 高温耐火骨料等各种炉料，不定型耐火材料预制件 比如 电炉炉顶预制件 大型高温冶炼炉 等 都远销国内外众多地方，建立了良好的合作关系。同行业中率先通过了国家质量体系认证，有较强的经济实力和较好的发展前景。
我厂始终秉着“诚信第一，质量第一”赢得广大新老客户好评！我厂全体员工竭诚欢迎各位光临惠顾，希望与业内朋友精诚合作，共创美好未来。
【厂区图片】
【英文翻译】
Crucible is an important part of chemical instrument, which is the container of melting and refining metal liquid and solid liquid heating and reaction, and it is the basis of the chemical reaction.
Crucible type specifications are more, in the application is not limited by the size of the production, batch size and the variety of smelting materials, can be arbitrary choice, strong applicability, and can ensure the purity of the melting material.
[product category]
The crucible can be divided into three categories: graphite crucible, clay crucible and metal crucible.
The main raw material of the graphite crucible is the crystalline form of natural graphite. So it keeps all kinds of physical and chemical properties of natural graphite.
Graphite crucible has good thermal conductivity and high temperature resistance. In the process of high temperature, the thermal expansion coefficient is small. For acid, alkaline solution has strong corrosion resistance, and has excellent chemical stability.
Graphite crucible, because of its excellent performance, so in metallurgy, casting, mechanical, chemical and other industrial sectors, is widely used in the smelting of alloy tool steel and non-ferrous metals and alloys. And has a good technical and economic results.
Jin Ganguo
Gold is also precious metal, corrosion resistance is very strong, but because of its low melting point (1063 degrees Celsius), limiting the scope of its use. Alkali metal hydroxide melting the erosion of gold, the gold melting crucible is better.
Note: gold in the high temperature gas lamp heating will melt (must not make contact with the gold Aqua)
Silver crucible
Silver than gold cheap. It erosion of potassium hydroxide or sodium, in the molten state only in the air close to the edge of the slightly play a role. But the melting point of silver for 960 DEG C, not on the fire heating, heating silver is generated on the surface of the layer of silver oxide, silver oxide is unstable at high temperatures and below 200 DEG C stability. Yin Yi and the effect of sulfur generated silver sulfide, not in silver crucible decomposition and burning sulfur material, allowed the use of alkaline sulfide flux. Melting state of aluminum, zinc, tin, lead, mercury and other metals in Yandu can make the silver crucible become brittle. Silver crucible is not available for the fused borax, leaching from the melt not use acid, especially not in contact with concentrated sulfuric acid and silver crucible quality by burning will change, so it is not adapt to the precipitation of weighing.
[product use]
(1) the burning of solid material
(2) the evaporation, concentration or crystallization of the solution (if it has an evaporating dish, it should be selected). Of course, the crucible can also be used for evaporation, condensation or crystallization of the solution.
[note] [note]
(1) can be directly heated, heated cannot quench, crucible clamp under
(2) when the crucible is heated, it is placed in the mud
(3) when the evaporation to stir; nearly steam dry when the use of waste heat
(4) after placing dry place, avoid by all means the rain water intrusion; use before the slow bake to 500 degrees Celsius can be used.
(5) should be in accordance with the crucible capacity feeding, avoid squeeze too tight, so as to avoid the metal thermal expansion of the crucible.
(6) to remove the metal melt, the best use spoon to scoop out, to minimize the use of calipers, if using calipers and other tools should and crucible shapes consistent, to avoid local stress and shorten the service life.
(7) the service life of the crucible is related to the use of the method, which should avoid the strong oxidizing flame directly sprayed onto the crucible, and make the crucible raw material oxidation.
The production of raw materials, can be summarized into three types. One is the crystalline nature of the natural graphite, two is the plastic refractory clay, three is through the calcination of the hard kaolin clay matrix. In 2008, began to use high temperature resistant synthetic materials, such as silicon carbide, alumina corundum and silicon do crucible skeleton of clinker. This kind of clinker has a significant effect on improving the quality of the crucible and enhancing the density and mechanical strength of the crucible.
[link]
Company name: Wenxian County Luyang refractory abrasive Co.
Contact: Zhang Yilin
Telephone: 86037160260283
Tel: 18236872210
Factory address: Henan Wenxian County Gu Wen Industrial Zone
【联系方式】
公司名称：温县绿洋耐材磨料有限公司
联系人：张怡琳
QQ:3433577985
电话：18236872210
工厂地址： 河南温县古温工业区