(中南大學(xué) 冶金與環(huán)境學(xué)院，長(zhǎng)沙 410083)
摘 要: 本文以廢電視機(jī)線路板破碎分選的銅粉和纖維粉兩種產(chǎn)物為原料，采用化學(xué)分析和物相分析等，研究了廢線路板破碎分選產(chǎn)物的工藝礦物學(xué)。金屬含量測(cè)定結(jié)果表明：廢線路板銅粉中銅含量的測(cè)定適合采用滴定法，且經(jīng)誤差分析確定樣品最佳取樣量為5 g；采用自動(dòng)礦物分析儀(MLA)檢測(cè)并確定了廢線路板銅粉和纖維粉末中各金屬的賦存形態(tài)：銅以單質(zhì)形式存在，鉛和錫則以焊錫形式存在，鎳和鋅則以合金形式存在，鋁有單質(zhì)鋁和三氧化二鋁兩種存在形態(tài)；廢線路板破碎分選產(chǎn)物纖維粉中有機(jī)物含量遠(yuǎn)高于銅粉中的；廢線路板破碎分選時(shí)，銅箔、焊錫和表面殘余物等金屬組分易于進(jìn)入銅粉中，而玻璃纖維布、黏結(jié)劑和阻焊油則主要進(jìn)入纖維粉中。
關(guān)鍵字: 廢印刷線路板；銅粉；工藝礦物學(xué)；焊錫
（School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:In this study, the process mineralogy of the copper powder and fiber powder broken and sorted by waste printed circuit board(WPCB) was studied by means of chemical analysis and phase analysis. The results of metal content testing show that the titration method is suitable for the analysis of copper in WPCB copper powder due to its high content. The error analysis results of sampling mass show that the optimal sampling mass is 5 g. The MLA results of copper powder and fiber powder of WPCB show that copper exists as metal, the lead and tin exist in the form of solder, nickel and zinc exist in the form of alloy, and aluminum exists in the form of metal and oxide. The content of organics in the fiber powder of WPCB crushing and sorting products is much higher than that of copper powder. In the process of crushing and sorting of WPCB, metal components, such as copper foil, solder and surface residue, are easy to enter the copper powder, while the glass fiber, binder and solder resistance oil mainly distribute into the fiber powder.
Key words: waste printed circuit board; copper powder; process mineralogy; soldering
