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Laporan Praktek Kerja Lapangan PT. Indominco Mandiri LEMBAR PENGESAHAN Laporan Kerja Praktek Di PT Indominco Mandiri Bontang, Kalimantan Timur Oleh : Guntur Partogi Hutapea Hapsari Widya Rosa 073.10.017 073.10.056 Telah diperiksa dan disetujui, Bontang, 10 April 2013 Pembimbing Lapangan Anang Kurnia...

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Laporan Praktek Kerja Lapangan PT. Indominco Mandiri LEMBAR PENGESAHAN Laporan Kerja Praktek Di PT Indominco Mandiri Bontang, Kalimantan Timur

Oleh :

Guntur Partogi Hutapea 073.10.017

Hapsari Widya Rosa 073.10.056

Telah diperiksa dan disetujui, Bontang, 10 April 2013

Pembimbing Lapangan

Anang Kurniawan NIK 1111571

Mengetahui Ketua Jurusan Program Studi Teknik Pertambangan Fakultas Teknologi Kebumian dan Energi Program Studi Teknik Pertambangan Universitas Trisakti i

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri KATA PENGANTAR

Puji dan syukur penulis panjatkan kepada Tuhan Yang Maha Esa atas berkat kasih dan karunia yang diberikan, sehingga penulis dapat menyelesaikan Laporan Praktek Kerja Lapangan di PT Indominco Mandiri, Bontang, Kalimantan Timur. Dalam penyusunan laporan kerja praktek ini banyak pihak yang terlibat, baik langsung maupun tidak langsung. Maka dari itu, penulis mengucapkan terimakasih kepada : 1. Keluarga tercinta yang telah memberikan dukungan moral maupun materil 2. Ibunda dan Ayahanda dari Saudara kami (alm. Rifandi) yang telah memberikan doa dan dukungan 3. Bapak Leo Krisna Estiarko, S.T, Dept. Head Coal Processing Plant 1 , PT Indominco Mandiri 4. Bapak Abiyoso Puntadewa, S.T, Mine Facility Operation Supervisor Coal Processing Plant 1 PT Indominco Mandiri 5. Bapak Anang Kurniawan, S.T, Pembimbing Lapangan Coal Processing Plant 1 6. Seluruh Staff Departement Coal Processing Plant 1 PT. Indominco Mandiri 7. Seluruh Staff Departement Mine Engineering PT. Indomico Mandiri 8. Seluruh Staff Departement Mine Operation PT. Indominco Mandiri 9. Seluruh Staff Departement Laboratorium PT. Indominco Mandiri 10. Seluruh Staff HRD PT. Indominco Mandiri 11. Ibu Dr. Pancanita Novi Hartami, S.T, M.T, Ketua Jurusan Prodi Teknik Pertambangan Universitas Trisakti 12. Ibu Dr. Dra. Hanny Djuanita, M.E.R dan Bapak Ir. Bani Nugroho, M.T, Pembimbing Akademik Angkatan 2010 Teknik Pertambangan Universitas Trisakti 13. Para Dosen Teknik Pertambangan Universitas Trisakti 14. Saudara-saudari Teknik Pertambangan Universitas Trisakti khususnya angkatan 2010 15. Teman-teman Praktek Kerja Lapangan di Camp Km 23 PT. Indominco Mandiri

ii

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri Pada penyusunan Laporan Kerja Praktek ini, penulis menyadari bahwa masih ada kekurangan dalam proses penulisan ini. Maka dari itu, penulis menerima kritik dan saran dari pembaca agar dapat menyempurnakan laporan ini. Akhir kata, penulis ucapkan terima kasih, semoga laporan ini bermanfaat bagi pembaca.

Hormat Kami

Penulis

iii

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri DAFTAR ISI

LEMBAR PENGESAHAN ......................................................................................... i KATA PENGANTAR .................................................................................................. ii DAFTAR ISI ................................................................................................................. iv DAFTAR GAMBAR .................................................................................................... vii DAFTAR TABEL ........................................................................................................ ix DAFTAR LAMPIRAN ................................................................................................ x BAB I PENDAHULUAN .............................................................................................

1

1.1 Latar Belakang ....................................................................................................... 1.2 Maksud dan Tujuan ............................................................................................... 1.3 Perumusan Masalah .............................................................................................. 1.4 Waktu dan Tempat Pelaksanaan ......................................................................... 1.5 Sistematika Penulisan ............................................................................................

1 2 2 2 3

BAB II TINJAUAN UMUM .......................................................................................

4

2.1 Sejarah Perusahaan .............................................................................................. 2.2 Geografi PT Indominco Mandiri .......................................................................... 2.3 Keadaan Geologi .................................................................................................... 2.3.1 Morfologi .............................................................................................................. 2.3.2 Stratigrafi ............................................................................................................. 2.3.3 Formasi Batuan ................................................................................................... 2.3.4 Struktur Geologi ................................................................................................. 2.3.5 Hidrologi dan Hidrogeologi ................................................................................ 2.4 Sistem Penambangan ............................................................................................. 2.4.1 Land Clearing ...................................................................................................... 2.4.2 Pemindahan Topsoil ........................................................................................... 2.4.3 Pengupasan Overburden .................................................................................... 2.4.4 Dimensi dan Penambangan Batubara ............................................................... 2.5 Dewatering .............................................................................................................. 2.5.1 Catchment Area .................................................................................................. 2.5.2 Sump ..................................................................................................................... 2.5.3 Settling Pond ........................................................................................................ 2.6 Proses Pengolahan Batubara ................................................................................ 2.7 Laboratorium Uji Kualitas Batubara .................................................................. 2.7.1 Penentuan Total Sulphur ................................................................................... 2.7.2 Penentuan Kadar Abu ........................................................................................

4 5 7 7 8 8 10 10 11 11 13 14 16 18 18 18 19 20 25 26 27

iv

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri 2.7.3 Penentuan Kadar Zat Terbang .......................................................................... 2.7.4 Penentuan Total Moisture .................................................................................. 2.7.5 Penentuan Nilai Fixed Carbon ........................................................................... 2.7.6 Penentuan Nilai Kalori .......................................................................................

27 28 28 29

BAB III TEORI DASAR .............................................................................................

30

3.1 Definisi Batubara ................................................................................................... 3.2 Proses Terbentuknya Batubara ............................................................................ 3.3 Parameter Kualitas Batubara ............................................................................... 3.3.1 Nilai Kalori (Calorivic Value) ............................................................................ 3.3.2 Kandungan Abu (Ash Content) ......................................................................... 3.3.3 Total Sulfur (Total Sulphur) .............................................................................. 3.3.4 Zat Terbang ......................................................................................................... 3.3.5 Kandungan Air .................................................................................................... 3.3.5.1 Equilibrum Moisture ....................................................................................... 3.3.5.2 Total Moisture .................................................................................................. 3.3.5.3 Air Dried Moisture ........................................................................................... 3.3.5.4 Transportable Moisture Limit ........................................................................ 3.3.6 Fixed Carbon ....................................................................................................... 3.4 Pencampuran Batubara (Blending) .....................................................................

30 30 31 34 35 35 37 37 38 39 40 40 41 41

BAB IV METODOLOGI PENELITIAN ..................................................................

43

4.1 Konsepsi Dasar ....................................................................................................... 4.2 Prosedur Kerja .......................................................................................................

43 44

BAB V ANALISA DATA DAN PEMBAHASAN .....................................................

45

5.1 Data Teknis di ROM Coal Processing Plant 1 .................................................... 5.2 Pengolahan Data .................................................................................................... 5.3 Perbandingan Kualitas Batubara ........................................................................ 5.3.1 Perbandingan Kualitas Batubara Berdasarkan Parameter Uji Laboratorium .............................................................................................................. 5.3.1.1 Calorific Value dan Ash Content ................................................................... 5.3.1.2 Total Sulphur ................................................................................................... 5.3.1.3 Total Moisture ................................................................................................. 5.3.1.4 Mineral Matter ................................................................................................

45 46 50

v

53 53 55 57 58

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri

BAB VI PENUTUP ......................................................................................................

60

6.1 Kesimpulan ............................................................................................................. 6.2 Saran .......................................................................................................................

60 61

DAFTAR PUSTAKA ...................................................................................................

62

vi

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri DAFTAR GAMBAR

No

Keterangan

Hal

2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 3.01 3.02 3.03 3.04 3.05 4.01

Peta Lokasi PT Indominco Mandiri ............................................................. Lokasi Kesampaian Daerah .......................................................................... Land Clearing ................................................................................................. Excavator Backhoe PC 300 ........................................................................... Articulated Dump Truck Komatsu HM 400 ................................................ Spreading Topsoil ........................................................................................... Pengupasan Overburden ............................................................................... Dimensi Lereng Blok Barat dan Blok Timur .............................................. Lokasi Penambangan East Block Pit 19 D ................................................... Coal Getting .................................................................................................... Sump ................................................................................................................ Settling Pond ................................................................................................... Penumpahan Batubara ke Hopper ............................................................... Feeder Breaker ............................................................................................... Metal Detector dan Magnet Catcher ............................................................ Produk Batubara Berukuran -50 mm .......................................................... Automatic Sampler ......................................................................................... Twin Boom Stacker ........................................................................................ Bulldozer Mendorong Muatan Menuju Reclaimer Feeder ....................... Wheel Loader Memuat Batubara ke Double Trolley ................................. Proses Pemuatan Batubara dari Loading Bin ............................................. Pengangkutan Batubara Menuju Port ......................................................... Flow Chart Penentuan Total Sulphur .......................................................... Furnace Total Sulphur Infrared LECO S-144-DR ..................................... Ash Furnace .................................................................................................... Volatile Matter Furnace ................................................................................. Minimum Free Space Oven ........................................................................... Rangkaian Bomb Kalorimeter ...................................................................... Proses Terbentuknya Batubara .................................................................... ASTM Coal Rank Classification ................................................................... Sedimentasi Organik ...................................................................................... Perbandingan Nilai Kalori dan Kandungan Abu ....................................... Jenis-jenis Sulfur ............................................................................................ Tahapan (Alur) Penelitian .............................................................................

vii

6 7 12 13 13 14 15 15 17 18 19 19 20 21 21 22 22 23 23 24 24 25 26 26 27 27 28 29 30 31 34 35 36 44

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri

5.01 5.02 5.03 5.04 5.05 5.06

Tabel Kualitas Batubara ................................................................................ Grafik Perbandingan CV .............................................................................. Grafik Perbandingan Ash .............................................................................. Grafik Perbandingan Total Sulphur ............................................................ Grafik Perbandingan Total Moisture ........................................................... Grafik Perbandingan Mineral Matter ..........................................................

viii

50 53 54 55 57 58

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri DAFTAR TABEL

No

Keterangan

Hal

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Pengambilan Data di Lapangan (25 Maret 2013) .................................................................. Pengambilan Data di Lapangan (26 Maret 2013) .................................................................. Pengambilan Data di Lapangan (27 Maret 2013) .................................................................. Pengambilan Data di Lapangan (28 Maret 2013) .................................................................. Pengambilan Data di Lapangan (01 April 2013) .................................................................. Pengambilan Data di Lapangan (02 April 2013) ................................................................... Perbandingan % Blending antara Plan dan Aktual (25 Maret 2013) ................................. Perbandingan % Blending antara Plan dan Aktual (26 Maret 2013) ................................. Perbandingan % Blending antara Plan dan Aktual (27 Maret 2013) ................................. Perbandingan % Blending antara Plan dan Aktual (28 Maret 2013) .................................

46 46 46 47 47 47 48 48 49 49 49 49 51 51 52 52 52 52

Perbandingan % Blending antara Plan dan Aktual (1 April 2013) .................................... Perbandingan % Blending antara Plan dan Aktual (2 April 2013) .................................... Perbedaan Kualitas Blending Plan, Aktual, dan Laboratorium (25 Maret 2013) ............ Perbedaan Kualitas Blending Plan, Aktual, dan Laboratorium (26 Maret 2013) ............. Perbedaan Kualitas Blending Plan, Aktual, dan Laboratorium (27 Maret 2013) ............. Perbedaan Kualitas Blending Plan, Aktual, dan Laboratorium (28 Maret 2013) ............. Perbedaan Kualitas Blending Plan, Aktual, dan Laboratorium (01 Apri1 2013) .............. Perbedaan Kualitas Blending Plan, Aktual, dan Laboratorium (02 April 2013) ..............

ix

Laporan Praktek Kerja Lapangan PT. Indominco Mandiri DAFTAR LAMPIRAN

1. Data Hari Senin, 25 Maret 2013

Unit Truck Jenis

No Unit

MJ

96 97 98 113 114 115 13 14 15 16 17 101 102 103 104 105

UTSG

LD

Ton

8:00

30 30 30 30 30 30 30 30 30 30 30 27 27 27 27 27

46 50 59 38 45 35 27 ; 40 ; 55 34 ; 58 39 ; 49 -

TOTAL (TON)

Senin, 25 Maret 2013 Seam 6 Sumalindo (LCV - LTS) JAM 9:00 10:00 11:00 12:00 MENIT 32 32 45 15 04 15 18 25 30 04 10 01 02 45 41 50 16 16 43 45 08 18 03 10 ; 17 08 ; 19 25 ; 41 05 ; 15 ; 37 ; 59 20 15 ; 26 12 ; 29 ; 48 25 ; 39 45 ; 55 18 18 ; 39 ; 50 -

369

315

372

291

13:00

14:00

50 12 32 38 16 ; 39 ; 48 07 ; 18 ; 30 ; 46 06 ; 21 ; 37 -

05 32 25 05 ; 21 ; 33 09 02 ; 20 ; 39 -

390

279

360

Senin, 25 Maret 2013 Seam 13 HW (HCV-LTS) Unit Truck Jenis

No Unit

REP

64 65 66 71 72 01 06

UTSG

12:00

13:00

14:00

25 13 01 03 ; 32 37 -

JAM 11:00 MENIT 03 10 20

04 ; 38 21 ; 47 35 15 ; 41 20 18 30

47 41 58 52 35

52 10 52 44 44 -

121,2

60,6

202,0

101,0

101,0

Ton

8:00

9:00

10:00

20,2 20,2 20,2 20,2 20,2 20,2 20,2

15 30 11 ; 47 23 ; 55 -

20 ; 48 00 ; 35 25 25 08 -

121,2

161,6

TOTAL (TON)