查询词典 leaching

Taking a smeltery in Shenyang,Liaoning Province as research object,several alkali chemicals were added to increase the soil pH and reduce leaching toxicity of arsenic in soil impacted by heavy metals.

文章以沈阳某冶炼厂厂区旧址的重金属复合污染土壤为研究对象，通过向土壤中添加不同药剂，研究了不同碱性化学物质对土壤砷稳定化的效果。

Especially the production can be carried through normally by effectually controlling the concentration of leaching solution and changing the place and way of adding sodium cyanide.

为此，对原有工艺和设备进行了技术改造，特别是通过对浸出浓度的有效控制及氰化钠加入点和方式的改变，使生产能正常平稳进行。

He technology of molybdenum recovery by the low concentration sodium hypochlorite leaching process from the low grade .

低浓度次氯酸钠氧化浸出工艺回收低品位辉钼矿的钼是可行的。

The technology of molybdenum recovery by the low concentration sodium hypochlorite leaching process from the low grade .

低浓度次氯酸钠氧化浸出工艺回收低品位辉钼矿的钼是可行的。

There is an annual movement of salt with water in coastal solonchak in Liaoning as follows: The thawing-evapo-salinization period in spring, irrigation-leaching-desalting period in rice growing season from May to September, evapo-salinization period again in late fall and relatively stable period in winter.

辽宁沿海盐土中盐分每年随水移动如下：春季为冻融-蒸发-盐化期，5~9月为灌溉-淋洗-脱盐水稻种植期，晚秋为蒸发-盐化期，冬季为相对稳定期。

The invention forms a new soil layer structure with the upper part rough and the lower part fine, increases a coarse sand content of upper soil and obviously improves soil tilth; thereby facilitating the leaching of the salt. Only half a year is needed and then the salt content of a plow layer is reduced from six point five four gram per kilogram to one point two three gram per kilogram; thereby speeding up the improvement and utilization speed of the marine solonchak and restraining the uprise of salt.

本发明形成上粗下细的新土层结构，增加了上层土壤的粗砂粒含量，明显改善了土壤耕性；有利于盐分的淋洗，仅需半年时间，耕作层含盐量即可由6.54g/kg降至1.23g/kg，加快了滨海盐土的改良利用速度，并抑制了返盐现象。

The sodium stannate from slag containing tin is prepared directly by the process including alkali fusion ,leaching,purification,concentration and crystallization.

以含锡渣为原料，采用碱熔—浸出—除杂—浓缩结晶工艺直接制取了锡酸钠产品。

Experiment results show that the leaching rate of vanadium in roasted stone coal in water is lower when mass fraction of calcium in stone coal is higher.

试验发现，对来自同一矿区的矿样，当其中钙元素质量分数较高时，熟料中高价钒的水浸出率较低。

The function, peculiarity and developing circumstance of computer simulative system of blasting grade for stope leaching are introduced.

介绍了原地破碎浸出爆破粒度控制计算机模拟系统的功能、特点和开发环境。

The results show that the dissolution of Ag was restrained by forming of a silver suboxide film on the surface under low oxidant concentration and atmospheric pressure conditions (e.g., in NH_3-O_2-H_2O system); when the concentration of oxidant was high enough (e.g., in NH_3-H_2O_2-H_2O system), the leaching process was carried out without forming of the film and the rate of dissolution of Ag was controlled by a step of mass transfer.

结果表明，在常压下氧化剂浓度低时(如在NH_3-O_2体系中)，浸取反应受在Ag表面上生成的氧化物膜所阻碍；而在浓度足够高的氧化剂时(如在NH_3-H_2O_2体系中)，浸取过程可在不生成氧化物膜的条件下进行，此时Ag的溶解速度受传质步骤控制。

Continuously improve the production mechanism, to provide customers with better quality products and services.

不断的完善生产机制，给客户提供更优质的产品及服务。

B:Yes, he was the very prize-winner in the court tennis ten years ago?

是的，他是十年前的世界网球冠军。