我国是钨资源储量最多的国家，但是品位高的黑钨矿占比并不大，尤其是经过了多年的开采之后，目前钨矿石最多的是品位较低的白钨矿。而且，钨在自然界中和很多金属或非金属元素伴生，进一步使得其提取富集变得更加困难复杂。我国冶金行业经过多年努力，开发出了针对各种钨矿的提取技术，取得了很大的成功。其中将钨矿焙烧浸取后调至微酸性，然后用离子交换树脂吸附富集钨的工艺是目前较为普遍采用的一种方法。苏青牌SQD-817是一种大孔型弱碱树脂，对钨吸附量非常大，而且容易洗脱。
China is the country with the most reserves of Tungsten in the world. However, only a small percentage of the reserves is the high-grade Wolframite, especially after so many years’ mining. The major Tungsten ores now are the low-grade Scheelite. And, Tungsten is usually associated with many other metals and nonmetals in nature. This makes the extraction of Tungsten even more difficult and complicated. After many years hard wok, Chinese metallurgical industry has successfully developed various extraction methods, which are suitable for various different Tungsten ores. Of which, the ion exchange method is now widely used: after roasting and leaching of the Tungsten Ores, the leachate is adjusted to slightly acidic, and then the Tungsten is adsorbed and recovered by ion exchange resins. Suqing SQD-817 is a macroporous weak base anion exchange resin. It has a very high Tungsten capacity and is very easy to be regenerated.
树脂的物化性能指标(Physical and Chemical Properties)
|
项目 |
SQD-817 |
|
质量全交换容量(Mass Capacity)≥ |
7.5 |
|
总交换容量(Total Capacity)mmol/ml≥ |
1.7 |
|
含水量(Water Retention)% |
62-72 |
|
湿视密度(Density)g/ml |
0.65-0.75 |
|
湿真密度(Bulk Density)g/ml |
1.05-1.12 |
|
粒度范围(Particle Size)% |
(0.315-1.25mm)≥95 |
|
有效粒径(Effective Size)mm |
0.45-0.7 |
|
均一系数(Uniformity Coefficient)≤ |
1.6 |
|
最高使用温度(Max Temperture)℃ |
80 |
|
渗磨圆球率(Osmotic Whole bead after Wearing) %≥ |
90 |
|
溶解性(Solubility) |
不溶于水和任何有机溶剂和酸碱 |
|
出厂型式(Shipping Form) |
游离胺(Free Amine) |
企业标准(Enterprise Standard)
Q/320281NAN 78-2019
树脂再生方法(Regeneration Method)
SQD-817可以单柱或多柱串联使用，在吸附饱和后，用氢氧化钠或氨水洗脱吸附的钨。水洗至接近中性后，再用稀硫酸或盐酸转成酸型，然后再水洗至pH3-5左右即可。
SQD-817 may be used in single column or multi-column connected in series. When the resin is saturated, elute with NaOH or ammonia solution . And then, wash with water close to neutral. Thereafter, pass diluted H2SO4 or HCl to convert the resin into acid form and wash with water to pH 3-5. Then the resin is ready for re-use.
树脂动力学性能(Hydraulic Characteristics)
包装(Packing)
25Kg、25L编织涂膜袋，或1立方大包。
25Kg, 25L woven coating bag, or 1 cubic bag.
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