铅的熔炼

Based on research of the new technology, pre-control program for smelting enrjched-Pb slag in blast furnace was put forward.

文章在此新工艺基础上研究编制了鼓风炉熔炼富铅渣的预控程序。

Under strict quality control of CQC, kaina lead-free solder is used in high-purity refined tin and advanced smelting technology, a unique anti-oxidant formula alloy, its taphole amount is very small, bright solder joints, reliable, good wetting, it is suitable in lead-free wave soldering and hot dip soldering

在CQC严密的质量监控下，凯纳无铅焊锡条采用高纯度精锡及先进的熔炼工艺，独特的抗氧化合金配方，其出渣量极少，焊点光亮、可靠，湿润性好，适用于无铅波峰焊和热浸焊。本企业供应58℃～145℃不同熔点温度的无铅低温焊锡条。

Now marketing the brand enables crystal products, the majority of whom were imitation crystal, the crystal products are cheaper raw materials used in glass to add a certain percentage of lead from the fake crystal, Some of the better quality crystal products manufactured raw materials to more complex processes, others are natural crystal for the original unburnt earthenware or glass and lead crystal with the natural Suimo by re-smelting.

现在市场上销售的水晶制品品牌渐多，其中绝大多数皆为仿制的水晶，较为便宜些的水晶制品使用的原材料是在玻璃中加入一定比例的铅制成的仿水晶，品质更好一些的水晶制品原料制成的工艺要更为复杂一些，有些则是以天然水晶作原坯加入玻璃和铅或用天然水晶的碎末重新熔炼而成。

But Pb-Cu alloy liquid is immiscibly and generally and rapidly separated into two distinct layers due to the big difference of density and melting points between the Cu and Pb; it is difficult to produce the uniformly dispersed microstructure without segregation.

但是铜铅合金熔炼时，铜与铅的熔点、比重差距大，而且铅在铜中的溶解度很低，最终组织极易形成严重偏析，严重影响产品质量，很难制造出铅弥散分布于铜中的优质合金。

Experimental studies on the smelting of jamesonite concentrates were carried out.

对脆硫铅锑矿精矿的熔炼过程进行了实验研究。

Experts believe the project with the traditional lead-smelting technology, has the following characteristics: First, the smelting process to adopt internationally advanced level of oxygen blowing at the end of smelting - to restore the blast furnace method, the use of lead refining electrolysis ; Second, the use of sulfur dioxide gas double-absorption acid technology, the production of domestic water use of recycled water sewage treatment process; Third, the use of waste heat for power generation, waste to make full use of energy reduces energy consumption; Fourth, the high level of automation, low power consumption , Investment, raw materials adaptable, comprehensive recovery rate of high-quality products.

专家认为，该项目与传统炼铅工艺技术相比，具有以下特点：一是冶炼工艺采用具有国际先进水平的氧气底吹熔炼-鼓风炉还原法，铅精炼采用电解法；二是二氧化硫烟气采用两转两吸制酸工艺，生产生活用水采用循环水污水处理工艺；三是利用余热发电，充分利用废弃能源降低了能耗；四是自动化水平高、能耗低、投资省、对原材料适应性强、综合回收率高、产品质量好。

The result shows that sulphur in the raw material is fixed in the slag in the form of sodium sulphide during smelting, main metals of lead and antimony and precious metals are concentrated in the metallic phase while zinc, indium and other associated metals existing in the slag.

在熔炼时原料中的硫元素全部以硫化钠的形式被固定在熔炼渣中，铅锑主金属及贵金属进入金属相，锌、铟等伴生金属元素进入渣相。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。