碳化硅石墨坩埚厂家电话
碳化硅石墨坩埚厂家电话

碳化硅石墨坩埚厂家电话

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2018-05-03 10:49:14
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大城县津大坩埚厂

大城县津大坩埚厂

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碳化硅石墨坩埚厂家使用时间:对于熔铝及各类铝合金,使用时间达六个月以上。熔铜几百次。其他金属均

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碳化硅石墨坩埚厂家碳化硅石墨坩埚厂家碳化硅石墨坩埚厂家


* 中冀金钢牌熔铝碳化硅石墨坩埚中部带嘴DZ1000号。* 中冀金钢牌熔铝碳化硅石墨坩埚(中部带嘴)DZ1000号,上口外径855mm,外高540mm,用于电阻炉等
一、坩埚放入炉内,是等自身红透,先放一点小型的金属碎料在坩埚底,再放金属锭(金属锭下埚前必须放在炉沿边上烘烤),以免冷锭直接放进埚里,造成坩埚遇冷而炸裂。而且还必须保证这些材料在坩埚中受热时有足够的膨胀空间,否则坩埚容易被挤裂。
二、烘烤的金属锭必须慢慢的竖着放进埚里。如横着放进去,金属锭热膨胀容易把坩埚挤破。往坩埚中投料时必须非常小心,用夹钳把锭料和较重的材料小心地放入坩埚中。千万不要用倾倒的方式加料,锭料的棱角有可能撞裂坩埚。
三、使用过程中,埚里的金属水太少时,也不要一次加料太多,这样容易使埚内金属水遇冷而凝固,之后温度再次升高时,金属热膨胀而撑破坩埚。
添加剂的使用
1.添加剂必须严格按照规定的量添加,过量的添加剂会缩短坩埚的寿命。
2.添加剂不能放入空坩埚或固体金属中,应该在金属*溶解后再加入到金属液中间位置,并缓慢均匀的搅动,避免添加剂直接接触坩埚体。
3.加入片状或块状添加剂时应使用钟罩将其浸入金属溶液中。

1.坩埚属陶瓷制品,坩埚壁内存在一定数量的气孔,容易吸潮,所以*使用坩埚之前在不加料的条件下,坩埚必须进行预热以确保没有湿气残留在坩埚壁中:是放在有温度的炉边烘烤24小时以上,在这段时间内,坩埚要转动几次,使其均匀受热,去除坩埚壁内的潮气(或者将适量木柴放置坩埚内燃烧3小时左右达到预热效果)。以免坩埚升温太快,造成坩埚热膨胀,出现掉底、脱层或爆裂。
注:潮气一般在75100度时蒸发的zui快,所以在此温度时升温一定要慢;2小时后坩埚预热至150200度并保温一小时,之后每小时升温150度。由于在***度的温度范围内坩埚壁会出现快速氧化,氧化不仅会缩短坩埚的寿命,而且会由于热导率降低影响其使用性能,因此坩埚无需在此温度区间内停留过久的时间。
2. 坩埚经过*次预热后通常如连续使用无需再次预热,除非坩埚再次暴露于潮湿的环境中
3.坩埚预热后,操作人员需要在不加料的状态下快速升温到***度,并保温半小时,再降到正常的使用温度,然后加料。(加热坩埚使其温度高于正常工作温度会延长坩埚的使用寿命。)通常使坩埚加热至815930度,会有助于坩埚的釉料保护,如果有可能,这种高温加热可以每周都进行一次

 
  感应电炉坩埚的安装

1. 坩埚与感应线圈间的距离为8-10cm(确保坩埚放置在感应线圈的*部位)。
2. 感应线圈上表面附着的杂质要清理干净。
3. 炉底要用硬质耐火砖(好的耐火砖)垫平,所垫高度视坩埚与炉的高度而定。
4. 用优质的石棉布(厚2-3mm为好)贴附在感应线圈内侧,石棉布的上边应高于线圈,到平台口上。
5. 用于的石英砂(或莫来砂、耐火砂)放进坩埚与石棉布之间,一层层的夯实打起来。(注:用吸铁石吸一下石英砂中的杂质)
6. 用水玻璃、粘土、石英砂等混合成的混合物把上口封好。
注:坩埚安装好开始用时,用小功率30-50kw烘炉,等坩埚暗红时增至100kw,之后再调至所需功率。 
感应电炉坩埚安装注意事项 

  
燃气炉、生物颗粒炉、燃油炉、焦炭炉、煤炉中石墨碳化硅坩埚的正确安装。燃气炉、生物颗粒炉、燃油炉、焦炭炉、煤炉中石墨碳化硅坩埚的正确安装:
燃气炉、生物颗粒炉、燃油炉、焦炭炉、煤炉坩埚的安装
Gas stove, bio-particle furnace, oil furnace, coke oven, coal furnace crucible installation
错误的做法:在支撑砖和坩埚之间留下的空隙太小,坩埚膨胀受阻会裂开。
Wrong practice:The space left between the support brick and the crucible is too small, the crucible expansion will be blocked will crack. 
正确的做法:在支撑砖和坩埚之间插入小木片,木片会燃烧掉从而留下足够的空隙。
Right practice:I n s e r t a small piece of wood between the support brick and the crucible, and the wood burns away to leave enough clearance.
错误的做法:炉子顶部没有*密封,坩埚顶部容易受到氧气氧化,从而产生竖直裂纹。
Wrong practice:The top of the furnace is not compley sealed, and the top of the crucible is susceptible to oxygen oxidation, resulting in a vertical crack.
正确的做法:用保温棉把炉沿密封
Right practice:Use heat insulation cotton to seal the furnace along.
一、安装坩埚前,必须先检查炉膛内部:炉壁和炉底应该是完好无损,必须干燥,没有金属或炉渣附着。如果炉壁或炉底附着水泥或炉渣,必须要进行清理。否则火焰的前进会受到阻碍而使火焰方向发生偏转,从而造成坩埚局部受热过度,在坩埚壁上发生氧化或产生小洞。
First, before the crucible is installed, the inside of the furnace must be checked. The furnace wall and the bottom should be intact, must be dry, no metal or slag adhesion. It must be cleaned up If the furnace wall or bottom adhesion of cement or slag. Otherwise, the advance of the flame will be hindered and the direction of the flame will be deflected, resulting in the local overheating of the crucible, oxidation or small hole on the crucible wall. 
二、坩埚的底部支撑:
Second, the bottom of the crucible support:
1.安装坩埚时,坩埚的底部支撑必须使用表面平整的、足够大的圆柱形底座,底座的直径至少要与坩埚的底部相同,是略大2-3cm,且底座高度略高于出火口,从而防止火焰直接烧到坩埚底部。否则容易造成底部材料迅速被侵蚀,坩埚变成锥形,或由于坩埚底部受力不均而使坩埚开裂。Install the crucible, crucible bottom supporting large enough of a cylindrical base must be used with smooth surface, and the base diameter of at least to the bottom of the crucible, preferably 2-3cm, and the base height is slightly higher than the outlet, thereby preventing direct flame burn at the bottom of the crucible. Otherwise, it is easy to cause the bottom material to be eroded rapidly, and the crucible is tapered, or the crucible is cracked due to the uneven force at the bottom of the crucible.
2.为防止坩埚与底座粘连,可以在坩埚与底座间放一层隔离物(如:细耐火砂或高温棉。)
In order to prevent the crucible from sticking to the base, a layer of isolation between the crucible and the base (e.g., fine sand or high temperature) can be provided. 
3.在倾转炉中使用卡隼式底座时,必须保证底座的凸起和坩埚凹槽是互相匹配的。如果底座的凸起太高或者尺寸太大,坩埚底部会受到挤压,必然造成底部破裂,而且在倾倒后,坩埚不能被有效地固定。Use a tenon type base in tilting converter, must ensure that the base bulge and the groove is matched in the crucible. If the height of the base is too high or the size is too large, the bottom of the crucible will be squeezed, and the bottom will be broken. After the dumping, the crucible cannot be effectively fixed.
4.安装带长浇嘴的倾转炉坩埚时,要提供高度合适的底座并把坩埚支撑固定好,如果底座支撑不合适,此类坩埚会只靠浇嘴“悬挂”在炉子内。这样坩埚会从上部断裂掉。
When installing a tilting converter crucible with a long spout, a highly suitable base is provided and the crucible is secured to the support, and if the base is not properly supported, such a crucible will be suspended in the furnace only by the spout. So the crucible will break from the top. 
三、坩埚与支撑砖间的空隙:
Third, the gap between crucible and support brick:
1.坩埚与支撑砖间的空隙太小,坩埚受热膨胀后会受阻裂开,可在坩埚和炉壁顶部支撑砖间直接放置可燃物(插入小木片或纸板),在坩埚加热后,可燃物会燃烧掉从而留下足够的空间。The gap between the crucible and the supporting brick is too small, after the expansion of the heated crucible will be blocked in the crack, crucible and furnace wall top supporting brick directly placing combustibles (i n s e r t the small pieces of wood or cardboard), in the crucible after heating, fuel burn down and leave enough space.
2.对于在侧面排废气的炉子,坩埚和炉壁之间可以用保温棉密封,然后用耐高温水泥固定。这样既可以防止因炉顶没有*密封,而使坩埚顶部氧化而裂开,且在坩埚受热向上膨胀时不会受阻裂开。For exhaust gas in the side of the stove, crucible and furnace wall can be sealed with insulation cotton, and then fixed with high temperature cement. This prevents both the top of the crucible from being oxidized and cracked by the top of the crucible due to incomplete sealing of the furnace roof, and is prevented from cracking when the crucible is heated upwardly.
(注:建议使用炉沿盖来防止坩埚的氧化、顶部开裂和腐蚀。炉沿盖的内边要覆盖住坩埚内表面100mm处,能更好地避免坩埚受到外力撞击和被氧化。)(Note: It is recommended to use the cover to prevent the oxidation of the crucible furnace top, cracking and corrosion. The inner side of the furnace cover is covered with the inner surface of the crucible 100mm, so as to avoid the impact of the external force and the oxidation of the crucible.)
3.在倾转炉中,应该在坩埚一半高度的位置上,有一块或两块支撑砖在浇嘴的下方把坩埚固定。应在坩埚和支撑砖之间放入34cm左右的高温棉,以保留足够的空间防止坩埚膨胀时受阻。
In the tilting furnace, one or two supporting bricks should be positioned below the crucible at a height of half the crucible to hold the crucible below the spout. You should be placed between the crucible and support brick around 3 4cm high temperature cotton, in order to retain enough space to prevent the crucible expansion blocked.
   

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