1) waste calcareousness and detritus
二灰碎石废料
1.
The indoor experiment and experiment results analysis on the waste calcareousness and detritus thrown away in the course of repairing highways are done to make sure they can meet the requirements of technical parameters in building highway base of various grades and to find out the best practical path.
通过对高速公路大修废弃的二灰碎石废料(铣刨法破除旧路面材料)进行室内试验和试验结果分析,以确定其性能能否满足各级公路基层及底基层的技术指标要求,并寻找其最佳应用途径。
2) flyash lime stabilized aggregate base course
二灰碎石混和料
4) lime-fly ash macadam
二灰碎石
1.
According to climate characteristics in Heilongjiang Province,the using state of lime-fly ash macadam as base layer in existing highway was investigated,and the failure reason was analyzed and compared with researched result in this paper.
针对黑龙江省寒冷的气候特点,对已建公路二灰碎石半刚性基层的使用状况进行调查,分析破坏的原因,并与研究成果进行比较。
2.
Combined with engineering instance,this paper analyzes the causes of the problems probably existed in paving road bed soil,grey soil and lime-fly ash macadam and in pavement construction,and proposes treatment measures in light of different problems,in order to ensure construction quality of road.
结合工程实例,对路床土、灰土、二灰碎石的铺设及路面施工中可能存在问题的原因进行了分析,并针对不同的问题提出针对性的处理措施,以保证道路的施工质量。
3.
Considering the serious waste of milled semi-rigid base in freeway overhaul, a technique on reclaimed lime-fly ash macadam used in rigid base was studied.
本文针对我国高速公路大修中半刚性基层铣刨后浪费严重的现状,研究了高速公路二灰碎石基层再生后做刚性基层的技术。
5) lime-flyash
二灰碎石
1.
Influential factors of maximum dry unit weight and optimum water content of lime-flyash concrete;
二灰碎石最大干容重和最佳含水量的影响因素
2.
The article mainly introduces the performance mechanism of watering vibration rolling in lime-flyash roadbed construction;it presents the construction process and precaution in a project and is a positive approach to the application of lime-flyash.
文章主要介绍了水振法在二灰混合料中应用的工作机理,并结合工程实例提出了施工中具体操作程序和注意事项,对二灰碎石混合料新工艺作出了积极的探索。
3.
Due to large shrinkage of lime-flyash,shrinkage cracking will easily happen to lime-flyash roadbed;admixture that can reduce shrinkage of lime-flyash is developed;test on the dry shrinkage and temperature contraction shrinkage of the mixture is made.
通过对二灰碎石路面基层的施工实践,针对二灰碎石材料收缩量大、容易出现收缩裂缝的实际情况,研发了一种减小收缩的外掺剂,并进行了干、温缩变形室内试验。
6) Lime-fly-ash bound macadam
二灰碎石
1.
In this research the lime-fly-ash bound macadam was joined with glass fibers in lab tests.
玻璃纤维掺入到二灰碎石基层中,对其强度和刚度进行试验。
2.
The Semi-rigid Base course material made of Lime-fly-ash bound macadam has been widely used in highway construction of China for its high workability and notable economic benefits.
半刚性路面基层材料——二灰碎石以其优良的工作性能和显著的经济效益在我国道路建设中得到了广泛应用。
3.
The bituminous pavement with semi-rigidity base made of lime-fly-ash bound macadam has been widely used in highway construction in China.
二灰碎石半刚性基层沥青路面在我国公路建设中得到了广泛的应用,但是二灰碎石半刚性材料由于干缩、温缩容易产生裂缝,从而导致半刚性基层沥青路面使用性能降低。
补充资料:电子工业废料中铂族金属回收
电子工业废料中铂族金属回收
recovery of platinum group metal from electronic scrap
d lon之}gongye fell旧0 Zhong bozuJ一nshu hulshou电子工业废料中铂族金属回收(recovery()fl)latxl飞um group metal from eleetrorlie serap) 从电子L业废料中进行铂族金属再生的过程。电子!业是把和钉的主要用户,用量占把和钉年消费量的尔%左有这类废料的把、钉含量变化很大,品位卜1趋}了降。废料先经人l二分拣,剔除杂质,再经锻烧除去可嫩性成分,然后根据物料特点按固体废料和液体废料分类处理 固体废料处理含铂族金属的固体废料主要有废旧接点、导线、电路板、电池等,形式多样,成分复杂,除含贵金属外,还含铁、铜、镍、锌等金属。处理方法有熔炼、剥离、溶解法等。 熔炼法将铂族金属含量较高的废料和熔剂混含熔炼,铸成阳极,进行电解精炼,得铂族金属。低品位电子废料常含铜或镍等金属,可直接铸成铜或镍阳极,进行电解精炼,再从铜或镍电解的阳极泥中回收铂族金属熔炼法可大批量地处理废料。 剥离法用剥离液使含铂族金属表层从废料基体卜脱离的过程。剥离液种类多,如剥离钉层采用含K3F。(t二N)。2009/IJ和NaC1 20()g/I的溶液在293K温度下处理10mm,即可使0.5,。、厚的钉层剥离.被处理废料的基体可保持完好。 溶解法用硝酸或硫酸溶解废料中的铂族金属例如,用热浓硝酸浸泡含把的电容器废料,使把溶解浸出液中加入把量3()倍的水并加热至沸,使硝酸把水解生成氧化把沉淀。把溶解和把沉淀的反应为: Pd+ZHN〔)3—Pd(Nf)):土壬{「 Pd(NO3)2+ZHZO—PdO·H:O专一字2壬王N(J 液体废料处理含铂族金属液体废料有电镀废液、酸洗液等酸性溶液。处理的原则流程为 f(l)金属置换法、 废液卜沉淀成(2)水解法卜,溶解一精制提纯 以3)化学沉淀法少 f(1)离子交换法飞 成(2)溶剂萃取法卜一氢还原一纯金涌 ((3)化学提纯法少金属置换法回收率高,常用的置换金属有锌1铜、铁、铝等(见置换富集铂族金属)。水解法是依据溶液中铂族金属化合物在一定pH值下发生水解的啄理,控制好铂族金属水解的pH值,使铂族金属水解沉淀而得到回收的过程(见铂精炼)。化学沉淀法是沉淀剂与溶液中的铂族金属离子作用生成难溶化合物或使之还原成金属而得到回收的过程。常用的沉淀剂有甲酸铃‘硫化物和硼氢化钠(NaBH、)等(见选择性沉淀富集铂族金属)。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条