This new type of device is used to prepare sponge cadmium by one-time replacement of zinc powder. It has one-time replacement tank, zinc pulping tank, agitator and cadmium sulfate solution tube. Zinc pulping tank, cadmium sulfate solution tube and agitator one are installed at the top of the one-time replacement tank. The agitator one has a mixing shaft which is inserted into the one-time replacement tank and has three stirring blades. The top of the primary displacement tank is connected with the spiral plate heat exchanger. The middle and upper part of the primary displacement tank is an inverted circular platform. The bottom of the primary displacement tank is provided with a drain valve. Under the drain valve is a natural filter tank. There is a filter cloth in the natural filter tank, a conveying pump at the bottom of the tank, and a top of the primary displacement tank. The part is closed and connected with an exhaust fan connected with a primary replacement tank, and the outlet of the exhaust fan is connected with an acid mist purifying tower to purify toxic and harmful gases. The utility model can replace zinc powder only by adding cadmium sulfate solution according to the theoretical quantity. The reaction speed is fast, the efficiency is high, the replacement is thorough, and the sponge cadmium is not caking.
【技术实现步骤摘要】
锌粉一次置换制备海绵镉装置
本技术是一种锌粉一次置换制备海绵镉装置,属于冶金行业的锌冶炼
技术介绍
在传统湿法炼锌生产中,铜镉渣浸出得到的中性硫酸镉溶液,一些冶炼厂采用加锌粉常温两次置换,两次过滤得到海绵镉。这种工艺存在以下问题:需置换两次,工艺流程长,设备多,操作复杂;常温中性条件下,置换反应速度慢,且锌粉表面包裹的氧化锌难溶解,严重影响锌粉利用率,锌粉消耗量较大,反应不彻底,影响海绵镉压团效果和产品质量。
技术实现思路
本技术针对上述问题,提出一种锌粉一次置换制备海绵镉装置,该装置能够有效消除置换锌粉表面的氧化膜,提高反应速度,提高海绵镉质量,避免压团困难的问题。本实用新新型的目的通过如下手段实现:一种锌粉一次置换制备海绵镉装置,它有一次置换槽、锌粉浆化槽、搅拌器一和硫酸镉溶液管,其特征在于一次置换槽顶部装有锌粉浆化槽、硫酸镉溶液管和搅拌器一,搅拌器一的搅拌轴伸入一次置换槽内并有三层搅拌叶片,一次置换槽顶部还接有控制ph值的硫酸管。所述硫酸镉溶液管与螺旋板式换热器连接,以便将硫酸镉溶液预先加热。所述一次置换槽的中上部为圆筒形下部为倒立圆台形,台底有放液阀。所述放液阀下方有自然过滤槽,自然过滤槽内有滤布,槽底部有输送泵,以便将过滤后液泵送到锌电解作业。所述三层搅拌叶片的最下层为小叶片,在倒立圆台内。一次置换槽顶部封闭并接有与一次置换槽连通的抽风机,抽风机出口与酸雾净化塔连接,以便及时处理置换过程产生的有毒有害气体。所述锌粉浆化槽内有搅拌器二、水管和加锌粉口。本技术的工作过程如下:硫酸镉溶液经过螺旋板式换热器加热至40~60℃后放入一次置换槽;通过硫 ...
【技术保护点】
1.一种锌粉一次置换制备海绵镉装置,它有一次置换槽、锌粉浆化槽、搅拌器一和硫酸镉溶液管,其特征在于一次置换槽顶部装有锌粉浆化槽、硫酸镉溶液管和搅拌器一,搅拌器一的搅拌轴伸入一次置换槽内并有三层搅拌叶片,一次置换槽顶部还接有控制ph值的硫酸管。
【技术特征摘要】
1.一种锌粉一次置换制备海绵镉装置,它有一次置换槽、锌粉浆化槽、搅拌器一和硫酸镉溶液管,其特征在于一次置换槽顶部装有锌粉浆化槽、硫酸镉溶液管和搅拌器一,搅拌器一的搅拌轴伸入一次置换槽内并有三层搅拌叶片,一次置换槽顶部还接有控制ph值的硫酸管。2.根据权利要求1所述锌粉一次置换制备海绵镉装置,其特征在于硫酸镉溶液管与螺旋板式换热器连接。3.根据权利要求1所述锌粉一次置换制备海绵镉装置,其特征在于一次置换槽中上部为圆筒形下部为倒立圆台形,台底有放液阀。4....
【专利技术属性】
技术研发人员:孙红燕,森维,孔馨,冯绍平,刘贵阳,
申请(专利权)人:红河学院,
类型:新型
国别省市:云南,53
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