scholarly journals Flotation performance analysis on coal washery rejects

2021 ◽  
Author(s):  
P. Sharath Kumar ◽  
O. Sivrikaya ◽  
S. Pradhan ◽  
P.C. Nagannor
Keyword(s):  
Performance Analysis ◽  
Flotation Performance ◽  
Coal Washery

scholarly journals Optimization of Coal Washery Tailings by Flotation Process

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3956 ◽  
Author(s):  
Changliang Shi ◽  
Gan Cheng ◽  
Shengnan Wang
Keyword(s):  
Inflation Rate ◽  
Calorific Value ◽  
Ash Content ◽  
Cultivated Land ◽  
Clean Coal ◽  
Flotation Process ◽  
Flotation Tailings ◽  
Flotation Performance ◽  
Coal Washery ◽  
By Products

Flotation tailings are by-products of coal preparation plants, which do not only occupy cultivated land but also cause pollution. The high ash content and low calorific value of tailings limit their applications. Deashing is the precondition for the reutilization of flotation tailings. However, it is more difficult to remove ash content from flotation tailings compared with raw coal. Based on the analysis of coal properties, the flotation performance of different collectors was compared in this study. Flotation flows and the mechanism of depressants were explored. The optimized flotation conditions were as follows: pulp concentration of 100 g/L, inflation rate of 0.25 m3/(m2·min), collector (C4) dosage of 300 g/t, frother dosage of 500 g/t, and revolving speed of 2200 rpm. The ash content of clean coal was also reduced by adding a depressant. The flotation performance was best when the amount of sodium hexametaphosphate (used as the depressant) was 4 kg/t; the recovery of clean coal was 71.88%, and the ash content was 10.64%.

Analisis Sikap dan Kepuasan Petani dalam Menggunakan Benih Kelapa Sawit (Elaeis guineensis) Bersertifikat di Kabupaten Labuhan Batu Utara

AGRIMOR ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 40-44
Author(s):  
Myrna Pratiwi Nasution ◽  
Laura Juita Pinem
Keyword(s):  
Performance Analysis ◽  
Elaeis Guineensis

Produktivitas tanaman kelapa sawit sangat dipengaruhi oleh kualitas benih yang digunakan. Pemakaian benih kelapa sawit bersertifikat dipercayai oleh petani yang kritis dalam memberikan produktivitas tanaman kelapa sawit yang bermutu dan kontinyu. Sikap dan kepuasan petani dalam menggunakan benih kelapa sawit bersertifikat merupakan hal yang perlu dicermati untuk memahami keinginan petani. Penelitian ini dirancang untuk mengamati hal tersebut. Sikap petani dianalisis dengan menggunakan pendekatan multiatribut fishbean sedangkan kepuasan dianalisis dengan menggunakan Important Performance Analysis (IPA) dan Customer Satisfied Index (CSI). Berdasarkan penelitian diketahui bahwa atribut-atribut yang menentukan sikap dan kepuasan petani adalah hasil panen, ketahan terhadap hama dan penyakit, umur tanaman, daya tumbuhbenih, efisiensi penggunaan pupuk, jenis varietas, ukuran benih, sertifikasi benih, harga benih, harga Tandan Buah Segar (TBS), kemudahan dalam akses benih, stok benih, kemudahan dalam menjual TBS, dan promosi toko.Analisis multiatribut Fishbeinmenunjukkan sikap netral terhadap benih kelapa sawit bersertifikat (76 persen). Sementara hasil CSI menunjukkan bahwa 70.04 persen petani merasa puas atas atribut-atribut pada benih kelapa sawit bersertifikat.

Sign in / Sign up

Export Citation Format

Share Document