(1. 北京科技大學(xué) 金屬礦山高效開采與安全教育部重點實驗室，北京 100083;
2. 北京科技大學(xué) 土木與資源工程學(xué)院，北京 100083；
3. 北京聯(lián)合大學(xué) 北京市信息服務(wù)工程重點實驗室，北京 100101)
摘 要: 為提高全尾砂料漿濃密沉降的質(zhì)量濃度，將超聲波引入全尾砂料漿濃密沉降試驗中。利用MATLAB模擬超聲波在全尾砂料漿中的指向性，進(jìn)而選取出超聲波頻率范圍。采用Design-Expert軟件設(shè)計，并分析不同條件下超聲波對全尾砂料漿最終質(zhì)量濃度的影響，以及各因素之間的耦合關(guān)系，進(jìn)而優(yōu)化超聲波作用條件。結(jié)果表明：當(dāng)超聲波頻率為20~40 kHz時，在砂倉中傳播指向性較好；超聲波外場作用能顯著提高全尾砂料漿的最終質(zhì)量濃度，當(dāng)全尾砂自然沉降19.77 min后，施加頻率20.02 kHz、功率50 W的超聲波為最優(yōu)作用條件，全尾砂料漿最終質(zhì)量濃度可達(dá)77.51%，比自然沉降的最終質(zhì)量濃度提高4.60%；在合適的超聲場條件下，超聲波在提高全尾砂料漿的最終質(zhì)量濃度具有明顯優(yōu)越性。
關(guān)鍵字: 充填采礦；全尾砂；響應(yīng)面；超聲波；濃密沉降
（1. Key Laboratory of High-Efficient Mining and Safe of Metal, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3. Beijing Key Laboratory of Information Service Engineering, Beijing Union University, Beijing 100101, China）
Abstract:In order to improve the mass concentration of unclassified tailings slurry thickening sedimentation, the ultrasonic technology was introduced into the thickening sedimentation test of unclassified tailings slurry. MATLB was used to simulate the directivity of the ultrasonic in unclassified tailings slurry, and then the ultrasonic frequency range was selected. Meanwhile, The Design-Expert software was used to design and analyze the effect of ultrasonic on the final mass concentration of the tailings slurry and the coupling relationship between the factors, and then optimize the ultrasonic action conditions. The results show that, when the ultrasonic frequency is about 20-40 kHz, dissemination is better in vertical sand silo. The final mass concentration of the unclassified tailing slurry has been significantly increased under ultrasonic. The best conditions for ultrasonic application are frequency 20.02 kHz, power 50W and natural sedimentation time 19.77min. And the final mass concentration of unclassified tailings slurry reaches 77.51%, which is 4.60% higher than the final concentration of natural sedimentation. Therefore, ultrasound wave is capable of improving the final mass concentration under the condition of suitable ultrasound field.
Key words: back-fill mining; unclassified tailings; response surface; ultrasound; thickening sedimentation
