旧砂

Based on the analysis of the process of sand reclamation by way of centrifugal friction,the dynamic calculation on sand movement is made,and the system of sand reclamation by friction with the help of striking is presented.

在分析离心摩擦式旧砂再生过程的基础上，对砂子的运动作了动力学计算，得出了以摩擦为主、撞击为辅的再生产方式的结论。

It is so called chemical reclamation of water glass.

这即是"水玻璃旧砂的化学再生"。

When used in reclaimed sand,this binder has many drawbacks,such as low strength,high viscosity and so on,which hindered greatly its application and development in the reclaimed sand.

用于再生旧砂，这种粘结剂存在强度低、粘度大等缺陷，严重制约了它在再生旧砂中的应用。

The principle of chemical reclamation of sodium silicate sand through cognition of harden mechanism is presented.

介绍了水玻璃旧砂湿法、干法和热法再生原理，并简要说明了其应用情况；阐述了水玻璃旧砂化学再生的基本原理，并对水玻璃旧砂化学再生方面的研究及应用情况进行了论述。

It is recycling machine for machine with acentric dry method, flts for recyclingresin bonded sand and used sand.

该机是机械离心干法再生装置，主要用于树脂砂旧砂的再生。

It is recycling machine for machine with acentric dry method, fits for recycling resin bonded sand and used sand.

该机是机械离心干法再生装置，主要用于树脂砂旧砂的再生。

The results are as follow. There are better resuk for the reactors packed with old plastics in recovery and sulphonated coal than the one filled with quartz sand, and the results of the reactors filled with fruit hull and plastics of PVC are equal to it.

结果表明，以回收旧塑料及磺化煤作为填料的BPBC处理效果优于石英砂的，而果壳、PVC塑料的与石英砂的处理效果相当。

After backwashing, the regeneration ratio of the reactors filled with sulphonated coal, fruit hull, plastic of PVC and old plastic in recovery are all bigger than the one filled with quartz sand.

反冲洗后，以磺化煤、果壳、PVC塑料和回收旧塑料作填料的电解槽再生率均大于石英砂的。

Under function of impeller with high rotating speed, the used sand will be cast to the wearable junk ring to remove the inert film on su rface of the sand via mutual collision and friction between sand and junk ring, impeller and case of machine, sand and sand.

工作时旧砂在高速回转的叶轮作用下，抛向耐磨衬圈，通过砂粒与衬圈、叶轮与机盒、砂粒与砂粒之间的相互碰撞和摩擦，去除砂粒表面的树脂惰性膜。

There are a lot of factors influencing the mould sand performance,and two of the influences are ambient temperature and used sand temperature in production line.

影响型砂性能的因素很多，其中环境温度和旧砂温度对生产线用粘土型砂性能的影响较大。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。