LIMITTING REDUCTION RATIO SEBAGAI BATAS REDUKSI UKURAN MATERIAL PADA SINGLE TOGGLE JAW CRUSHER
DOI:
https://doi.org/10.33579/krvtk.v10i1.5723Kata Kunci:
Crushing, Jaw Crusher, Mineral Processing, Reduction Ratio, ReduksiAbstrak
Reduction Ratio (RR) dapat digunakan untuk memperkirakan ukuran produk yang dapat dihasilkan oleh suatu alat peremuk. Reduction ratio tersebut dapat dihitung dengan beberapa cara. Salah satu perhitungan yang dapat dilakukan adalah menghitung Limitting Reduction Ratio (LRR). Limitting Reduction Ratio merupakan perbandingan antara ukuran umpan terbesar dan ukuran produk terbesar. Penelitian ini bertujuan untuk menghitung Limitting Reduction Ratio pada operasi peremukan batu lempung sebanyak 30 sampel, yang dilakukan dalam skala laboratorium, dengan menggunakan alat peremuk tipe single toggle jaw crusher. Produk peremukan dipisahkan dengan hand sieving berukuran +4#, 10#, 20#, 40#, 60#,100#, 200#. Hasil penelitian menunjukkan bahwa, persentase produk peremukan yang dihasilkan masih terdapat pada ukuran sieve terbesar yaitu 4#, dengan jumlah rata-rata sebesar 52,33 %. Ukuran umpan terbesar berkisar antara 24 mm s/d 27 mm dan ukuran produk terbesar berkisar antara 4 mm s/d 6 mm. Hubungan antara total berat umpan dan total berat produk dapat dinyatakan dalam persamaan Y = 0,5229 X dan R2 = 0,9228, sedangkan hubungan ukuran umpan terbesar dengan ukuran produk terbesar dinyatakan dalam persamaan Y = 0,2044 X dan R2 = 0,9761. Perhitungan limitting reduction ratio berkisar antara 4,2 s/d 6,8, dengan nilai rata-rata sebesar 5,02.
Kata kunci: Crushing, Jaw Crusher, Mineral Processing, Reduction Ratio, Reduksi
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