(1. 江西理工大學(xué) 江西省礦業(yè)工程重點(diǎn)實(shí)驗(yàn)室，贛州 341000；
2. 北京礦冶科技集團(tuán)有限公司 礦物加工科學(xué)與技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室，北京 102628)
摘 要: 通過浮選試驗(yàn)、吸附量測(cè)試、紅外光譜(FTIR)分析和X射線光電子能譜(XPS)分析，研究抑制劑海藻酸鈉對(duì)磷灰石和方解石浮選的影響，考察海藻酸鈉對(duì)兩種礦物的抑制作用機(jī)理。浮選結(jié)果表明：pH=9時(shí)海藻酸鈉可強(qiáng)烈抑制方解石，而對(duì)磷灰石浮選的影響較小。海藻酸鈉在方解石表面的吸附量大于在磷灰石表面的吸附量。海藻酸鈉主要通過氫鍵吸附在磷灰石表面，而在方解石上的吸附則是氫鍵結(jié)合和化學(xué)鍵合共同作用所致。因此，海藻酸鈉在方解石上的吸附強(qiáng)于磷灰石，導(dǎo)致其對(duì)方解石的選擇性抑制。
關(guān)鍵字: 磷灰石；方解石；抑制劑；海藻酸鈉；分離機(jī)理
（1. Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2. State Key Laboratory of Mineral Processing Science and Technology, Beijing Mining and Metallurgy Technology Group Co., Ltd., Beijing 102628, China）
Abstract:The effect and mechanism of flotation separation of apatite and calcite using depressant sodium alginate (SA) were investigated through flotation test, adsorption test, FTIR and XPS analysis. The results show that SA can strongly inhibit calcite while has little effect on apatite flotation at pH=9. The adsorption amount of SA on the calcite surface is greater than that on the apatite surface. SA adsorbs on apatite mainly through hydrogen bonding, while adsorption of SA on calcite is caused by hydrogen bonding and chemical bonding. Therefore, the adsorption of SA on calcite is stronger than on apatite, leading to a selective depression of calcite.
Key words: apatite; calcite; depressant; sodium alginate; separation mechanism
