磷礦石是磷化工生產(chǎn)的重要原料,在國民經(jīng)濟的發(fā)展中占有重要地位。磷礦石入選品位的降低、有用礦物與脈石礦物性質(zhì)相似、礦物嵌布粒度過細等不利因素影響著磷礦選礦技術的發(fā)展。通過研究藥劑與礦物之間的相互作用機理有助于改善礦物的選別效果,綜述了磷礦石的重要性和浮選現(xiàn)狀,著重研究了偏磷酸鈉在中低品位磷礦石浮選中的應用及作用機理。

Phosphate rock is an important raw material for phosphorus chemical production, and plays an important role in the development of national economy. The development of phosphate ore dressing technology is affected by such unfavorable factors as the reduction of beneficiation grade of phosphate ore, the similarity of useful minerals and gangue minerals, and the fine particle size of minerals. The research on the interaction mechanism between reagents and minerals is helpful to improve the separation effect of minerals. The importance and flotation status of phosphate ores are summarized, and the application and mechanism of sodium metaphosphate in the flotation of low-grade phosphate ores are emphatically studied.

氫氧化鉀廠家研究發(fā)現(xiàn)偏磷酸鈉在磷礦石浮選中有兩個主要作用:

Potassium hydroxide manufacturers found that sodium metaphosphate has two main functions in phosphate rock flotation:

一是偏磷酸鈉的加入會與捕收劑在磷灰石礦物表面形成競爭吸附,抑制捕收劑在磷灰石礦物表面的吸附,從而改變礦物的親疏水性。

First, the addition of sodium metaphosphate will form competitive adsorption with the collector on the surface of apatite mineral, inhibit the adsorption of collector on the surface of apatite mineral, and thus change the hydrophobicity of mineral.

二是偏磷酸鈉的加入會引起礦物表面電荷發(fā)生改變,使得礦物顆粒間相互作用力隨之發(fā)生改變,增加礦物顆粒的分散性,從而優(yōu)化礦物浮選條件。

Secondly, the addition of sodium metaphosphate will change the mineral surface charge, which will change the interaction between mineral particles, increase the dispersion of mineral particles, and optimize the mineral flotation conditions.

偏磷酸鈉在浮選過程中還起到分散劑的作用。在鎳礦浮選過程中，蛇紋石泥化后覆蓋在鎳黃鐵礦表面，對浮選過程非常不利。因此添加一定量的偏磷酸鈉對鎳黃鐵礦的浮選回收非常有利，這主要是偏磷酸鈉的添加使得浮選礦漿分散，減少了蛇紋石在鎳黃鐵礦表面的覆蓋。

Sodium metaphosphate also acts as a dispersant in the flotation process. In the nickel ore flotation process, serpentine is slimed and covered on the surface of pentlandite, which is very unfavorable to the flotation process. Therefore, adding a certain amount of sodium metaphosphate is very beneficial to the flotation recovery of pentlandite, mainly because the addition of sodium metaphosphate disperses the flotation pulp and reduces the coverage of serpentine on the surface of pentlandite.

它的分散機理主要表現(xiàn)為：使礦物表面電位降低，使礦物顆粒之間的靜電排斥力增加。因為偏磷酸鈉是一種直鏈狀聚合化合物，其鏈長少能達到20～100個單位，當它吸附在礦物表面時，會使顆粒之間的空間位阻效應增大。

Its dispersion mechanism is mainly as follows: it reduces the surface potential of minerals and increases the electrostatic repulsion force between mineral particles. Because sodium metaphosphate is a straight chain polymer, its chain length can rarely reach 20~100 units. When it is adsorbed on the mineral surface, the steric effect between particles will increase.

此外在油田工業(yè)中偏磷酸鈉作為鉆井泥漿添加劑可以避免多價金屬離子沉淀，提高泥漿的抗鹽能力，降低泥漿失水。此外將一定量的偏磷酸鈉溶解后注入水管中，可以在管壁形成一層薄膜，以防止管道腐蝕。更多相關的信息了解就來我們網(wǎng)站http://www.shrisa.cn咨詢看看吧！

In addition, sodium metaphosphate as drilling mud additive in oilfield industry can avoid multivalent metal ion precipitation, improve the salt resistance of mud and reduce mud water loss. In addition, a certain amount of sodium metaphosphate is dissolved and injected into the water pipe to form a film on the pipe wall to prevent pipe corrosion. For more information, please come to our website http://www.shrisa.cn Consult!