LAPORAN KERJA PRAKTEK PT. TANJUNG ENIM LESTARI PULP AND PAPER Desa Niru Kec. Rambang Dangku, Kab. Muara Enim Provinsi Sumatera Selatan
Oleh: SIHAR F LUBIS (03061005090)
JURUSAN TEKNIK MESIN FAKULTAS TEKNIK UNIVERSITAS SRIWIJAYA 2010
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LEMBAR PENGESAHAN LAPORAN KERJA PRAKTEK PT. TANJUNG ENIM LESTARI PULP AND PAPER Desa Niru Kec. Rambang Dangku, Kab. Muara Enim Provinsi Sumatera Selatan
Disusun Oleh: SIHAR F LUBIS NIM: 03061005090 Mill Si Site,
Februari 20 2010
Menyetujui Central Shop Section Head
Pembimbing
(Robert MS)
( M. Udin S) Mechanical Maintenance Departement Manager
(Irwandi) Mengetahui, Head of Training Center
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KATA PENGANTAR
Segala puji kehadirat Tuhan Yang Maha Esa yang telah memberikan rahmat dan dan
hida hidaya yatt-Ny Nyaa
kepa kepada da
penu penuli lis, s,
sehi sehing ngga ga
atas atas
rahm rahmat atny nyaa
penu penuli liss
dapa dapatt
menyelesaikan tugas kerja praktek di PT. Tanjung Enim Lestari Pulp and Paper mulai tanggal 19 Januari 2010 sampai dengan 18 Februari 2010. Kerj apraktek ini diselesaika untuk melengkapi syarat kelulusan jenjang pada Jurusan Jurusan Teknik Mesin, Fakultas Fakultas Teknik, Teknik, Universit Universitas as Sriwijay Sriwijaya. a. Kerja Praktek ini dimaksudkan untuk memberikan penegetahuan kepada mahasiswa tentang berbagai permasalahn pada penggunaan teknologi di industri sehingga dapat melihat ilmu yang telah didapat pada saat kuliah. Untuk menyelseaikan laporan kerja praktek ini penulis memperoleh bantuan dari berbagai pihak. Oleh karena itu penulis mengucapkan terima kasih kepada: 1. Ir. Ir. Helmi, Helmi, MT selaku selaku ketua ketua Jurusan Jurusan Teknik Teknik Mesin,Fa Mesin,Fakul kultas tas Teknik Teknik,, Universitas Sriwijaya 2. Bambang Bambang Susant Susanto o selaku selaku Head of Training Training Center Center PT. Tanju Tanjung ng Enim Lestari Pulp And Paper, yan g telah memberikan izin kepada penulis untuk melakasanakan kegiatan kerja praktek 3. Irwand Irwandii selaku Manager Manager Mechani Mechanical cal Mainten Maintenance ance Departe Departemen mentt PT. Tanjung Enim Lestari Pulp And Paper, yang telah memberikan izin kepada penulis untuk melaksanakan kegiatan kerja praktek 4. Robert Robert MS sela selaku ku Head of Centr Central al Shop Shop Section Section PT. Tanj Tanjung ung Enim Enim Lestari Pulp And Paper 5. M. Udin Udin S sela selaku ku pemi pemibi bimb mbin ing g lapa lapang ngan an sela selama ma kerj kerjaa prak prakte tek k berlangsung.
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6. Selu Seluru ruh h karya karyawan wan PT. Tanjun Tanjung g Enim Enim Lestar Lestarii Pulp Pulp And Paper Paper dan kary karyawa awan n subco subcont ntac acto torr PT. PT. Truca Truca Jaya Jaya Engi Enginee neeri ring ng yang yang tela telah h membantu membantu selama selama kegiatan kegiatan kerja praktek di Mechanical Mechanical Maintenance Maintenance Section 7. Kedu Keduaa oran orang g tua tua say saya deng dengan an Henn Henny y Arid Aridaa Purba urba yang yang selal elalu u memberikan dorongan dan doa kalian sehingga dapat meyelesaikan laporan kerja praktek ini. 8. Tema Temann-te tema manku nku yang yang baik baik,, yang yang tela telah h memb member erika ikan n dukun dukunga gan n dan dan bantuan sehingga laporan kerja praktek ini dapat selesai 9. Semu Semuaa piha pihak k yang yang tela telah h memb member erik ikan an bant bantua uan, n, yang yang tida tidak k bias bias disebutkan satu-persatu untuk menyelesaikan laporan ini
Walaupun Walaupun telah telah berusaha berusaha semaksimal semaksimal mungkin, penulis menyadari menyadari penuh bahwa laporan ini jauh dari kesempurnaan. Oleh karena itu kritik dan saran yang sifatnya membangun sangat diharapkan penulis sebagai pengetahuan dan perbaikan di masa yang akan dating. Mudah-m Mudah-muda udahan han lapora laporan n yang yang penuli penuliss bias bias berman bermanfaa faatt baik baik bagi bagi penuli penuliss maupun bagi yang memabacanya.
Indralaya,
Februari 2010
Penulis
( SIHAR F LUBIS)
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DAFTAR ISI HALAMAN JUDUL LEMBAR PENGESAHAN KATA PENGANTAR DAFTAR ISI
I.
II.
III.
IV.
PENDAHULUAN
1
I.1 Latar Belakang
1
I.2 Tujuan Pelaksanaan
2
I.3 Tempat dan Waktu Pelaksanaan
2
I.4 Batasan Masalah
3
I.5 Metode Pengumpulan Data
3
COMPANY PROFILE
4
II.1 Pendahuluan
4
II.2 Lokasi Perusahaan
5
II.3 Keselematan, Kesehatan dan Penegendalian Lingkungan
5
II.4 Company Profile
7
DIGESTER
8
III.1 Tinjauan Secara Umum
8
CONE FOR ARM SCRAPER DIGESTER
10
IV.1 Karakteristik Baja Stainless Steel 304
10
IV.2 Deskripsi Operasional Peralatan
12
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V.
PENUTUP V. Kesimpulan
18
V. Saran
19
DAFTAR PUSTAKA LAMPIRAN
20
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BAB I PENDAHULUAN
I.1
Latar Belakang
Dalam Dalam perkem perkemban bangan gan teknol teknologi ogi yang yang berkem berkembang bang sangat sangat pesat pesat saat saat ini, ini, diperl diperluka ukan n sumber sumber daya daya manusi manusiaa yang yang handal handal dan berkua berkualit litas as sehing sehingga ga mampu mampu mengim mengimban bangi gi perkem perkemban bangan gan teknol teknologi ogi terseb tersebut. ut. Oleh Oleh karena karena itu, itu, keahlia keahlian n dan keterampilan adalah modal utama yang harus dimiliki oleh seseorang calon sumber daya manusia yang berkualitas. Dalam hal ini, mahasiswa adalah salah satu calon sumber sumber daya daya manusi manusiaa berkual berkualit itas as yang yang dihara diharapkan pkan mampu mampu bersai bersaing ng mengir mengiring ingii perke perkemba mbanga ngan n teknol teknologi ogi yang yang terus terus berkem berkemban bang. g. Landas Landasanan-lan landas dasan an teori teori dan keahlian yang dimiliki oleh tiap individu perlu diterapkan dan dikembangkan secara langsung di lapangan sehingga akan terjadi suatu perbandingan antara kenyataan di lapangan dengan landasan teori yang dipelajari di institusi pendidikan, diharapkan akan akan mengh menghas asil ilkan kan suat suatu u gagas gagasanan-ga gagas gasan an baru baru yang yang akan akan berm bermanf anfaa aatt bagi bagi perkembangan teknologi mendatang. Oleh karena itu, kerja praktek sangat penting dalam menunjang segala teori dan praktek yang diperoleh. Diperlukan suatu tempat yang dapat mengaplikasikan ilmu yang dimiliki sehingga dapat mengembangkannya menjadi suatu ie-ide kreatif
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2
Untuk memenuhi tujuan dari kerja praktek, maka penulisan melaksanakan kerja praktek di PT. Tanjung Enim Lestari Pulp And Paper, yakni perusahaan industri ya ng memproduksi bubur kertas ( pulp mill).
I.2
Tujuan Pelaksanaan
Adapun tujuan yang hendak dicapai dari kerja praktek ini adalah: 1. meng mengam amat ati, i, memb memban andi dingk ngkan an,, meng mengan anal alis isaa dan mener menerapk apkan an halhal-ha hall yang yang didapat dari bangku kuliah dengan yang ada pada dunia kerja. 2. dapat mengetahu mengetahuii persoalan-pe persoalan-persoal rsoalan an yang timbul timbul pada pada keadaan sebenar sebenarnya nya pada dunia industri. 3. memper memperlua luass wawasa wawasan n mahasi mahasiswa swa dalam dalam bidang teknik teknik pada umumnya umumnya dan teknik mesin pada khususnya.
Sedangkan tujuan khususnya antara lain:
1. Mengenal Mengenal dan dan memahami memahami tentan tentan g proses proses pembuat pembuatan an pada Cone
For
Arm
Scrapper Digester 2. Mengenal Mengenal berbagai berbagai jenis mesin mesin manufactu manufacture re dalam dalam pembuatan pembuatanCone Cone For Arm
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3 Waktu
I.4
: 19 Januari 2010-18 Februari 2010
Batasan Ma Masalah
Laporan Laporan Kerja Praktek ini akan memberikan pengenalan tentang PT.Tanjung PT.Tanjung Enim Lestari Pulp And Paper secara umum, dan juga mengenai proses pembuatan Cone For Arm Scrapper Digester secara umum
I.5
Metode Pengumpulan Data
Dalam penulisan penulisan ini, pengumpulan pengumpulan data merupakan hal yang sangat penting. penting. Pengumpulan data yang diperlukan dengan cara sebagai berikut: 1. Peng Pengum umpu pula lan n Data Data Pengumpulan yang didasarkan pada referensi atau dokumen perusahaan 2. Obse Observ rvas asii Lapa Lapang ngan an Metode yang dilakukan dengan pengamatan pengamatan secara langsung langsung pada proses proses pembuatan Cone For Arm Scraper Digester 3. Tinj Tinjau auan an Pust Pustak akaa Selain Selain dari observasi observasi lapangan, lapangan, data juga diambil diambil dari beberapa literature literature
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BAB II COMPANY PROFILE
II.1
Pendahuluan
Sebagai pabrik pulp pertama di Provinsi Sumatera Selatan PT.Tanjung Enim Lestari Pulp And Paper merupakan Pabrik pulp termodern yang menggunakan teknologi mutakhir serta merupakan pabrik di dunia yang menggunakan Acasia Mangium 100% dari Hutan Tanaman Industri (HTI).
Latar belakang perusahaan ini dimulai pada tahun 1991 saat penanaman pertama Acasia Mangium di Suban Jeriji, Sumatera Selatan yang merupakan kesempatan yang baik untuk membangun pabrik pulp yang menggunakan bahan baku Acasia Mangium PT.Tan PT.Tanjun jun
Eni
Lestar Lestarii Pul
And Pap
upak
Per
haa
Modal Modal Asi
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5
II.2
Lokasi Perusahaan
PT. Tanjung Enim Lestari Pulp And Paper secara resmi didirikan pada tanggal 18 Juni 1990 dan memulai kegiatan pembangunan pabrik sejak pertengahan 1997, yang berlokasi di desa Niru Kecamatan Rambang Dangku, Kabupaten Muara Enim, Provinsi Sumatera Selatan dan menempati areal luas 1250 ha, Pabrik mempunyai kapasitas produksi pulp sebesar 1430 ton/ hari atau 450.000 ton/tahun.
II.3 II.3
Kesel Ke selam amat atan, an, Kese Kesehat hatan an dan dan Pen Pengen gendal dalian ian Lingk Lingkung ungan an
Kesela Keselamat matan an dan kesehat kesehatan an kerja kerja (K3) (K3) merupa merupakan kan salah salah satu satu factor factor yang yang sangat penting dalam kegiatan perusahaan. Tujuan utama dalam program keselamatan dan keseha kesehatan tan kerja kerja adalah adalah pencega pencegahan han terjad terjadiny inyaa kecelak kecelakaan aan dalam dalam kerja. kerja. Bagi PT.Tanjung Enim Lestari Pulp And Paper hal ini merupakan suatu tantangan yang harus dihadapi dengan sungguh-sungguh. Konsep Konsep pencega pencegahan han kecela kecelakaan kaan kerja kerja diatur diatur dalam dalam UndangUndang-Und Undang ang No.1 Tahun Tahun 1970 dan setiap setiap perusa perusahaa haan n wajib wajib menera menerapkan pkan undangundang-und undang ang terseb tersebut. ut. Manajemen perusahaan bertanggung jawab atas hal tersebut, oleh karena itu seluruh
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6
Dala Dalam m
mela melaks ksan anak akan an
peng pengen enda dali lian an
ling lingku kung ngan an
dima dimaks ksud udka kan n
untu untuk k
mewujudkan kualitas lingkungan yang dapat dipertahankan sesuai fungsinya. Dalam hal pengelolaan lingkungan telah diatur dalam Peraturan Menteri Perindustrian dan Perdagangan No. 274/MPP/04/1999. Dalam hal ini PT. Tanjung Enim Lestari Pulp And Paper Paper telah telah mendap mendapatk atkan an semua semua persya persyarat ratan an perizi perizinan nan termas termasuk uk Analis Analisis is Meng Mengen enai ai Damp Dampak ak Ling Lingku kung ngan an (AMD (AMDAL AL))
dari dari Ment Menter erii
Peri Perind ndus ustr tria ian n
dan dan
Perdagangan Indonesia. Saat ini PT. Tanjung Enim Lestari Pulp And Paper telah berupaya merlakukan program 3R (Reduce, Recycle, Recovery) melalui minimalisasi limbah padat seperti pemas pemasaka akan n kembal kembalii mata mata kayu kayu (re-co (re-cook ok of knock) knock) dan pembua pembuatan tan kompos kompos dari dari limbah padat organic sesuai rekomendasi Kementerian Lingkungan Hidup.
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7
Dengan program ini, dua pertiga limbah padat yang selama ini ditimbun di landfi landfill ll dapat dapat dimanf dimanfaat aatkan kan kembal kembalii dan hanya hanya satu satu per tiga tiga bagian bagian yang yang tetap tetap ditimbun ditimbun di landfill. landfill. Melalui Melalui pengelolaan pengelolaan lingkungan ini, PT. Tanjung Enim Lestari Pulp And Paper selain berupaya meminimalisasi dampak-dampak negative yang tidak diiginkan diiginkan dengan mewujudkan kualitas lingkungan yang dapat dipertahankan dipertahankan sesuai sesuai fungsinya mengacu kepada persyartan AMDAI, dan peraturan perundangan yang berlaku juga berupaya mengurangi limbah-limbah yang dihasilkan dengan Program 3R dan pengembangan masyarakat dalam meningkatkan kualitas hidup masyrakat di sekitar lokasi pabrik. II.4
Company Pr Profile
Comp Compan any y Nam Namee
: PT PT. Tan Tanjjung ung Eni Enim m Les Lesttari ari Pul Pulp p And And Pape Paper r
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BAB III DIGESTER III.1
Tinjauan Umum Digester
Digester mempunyai system yaitu yang berhubungan penghancuran, seperti pemotongan kepingan kayu, penyaringan cairan hitam, uap panas dan kondensor potongan kayu, sistem air panas, system pengumpul kondensasi, system pendinginan dan dan peny penyum umbat batan an air, air, syst system em peni pening ngka kata tan n air air kila kilang ng dan syst system em peng pengum umpul pul kondensasi kondensasi pusat. pusat. Kayu dibuat dari selulosa, hemiselulosa, hemiselulosa, zat lilin, lilin, karbohidrat, karbohidrat, getah dan lemak. Ukuran dari bahan – bahan tersebut bervariasi, tergantung dari jenis kayunya Perawatan kimia dari kayu dengan melibatkan pemasakan dan bertujuan untuk memisahkan memisahkan serat dan menhilangkan menhilangkan bahan/ zat yang tidak diinginkan diinginkan Sistem Sistem Ahlstrom melarutkan getah dan zat lilin, memisahkan serat dan juga untuk tingkat
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9
6. Bagian ekstraksi, ekstraksi, Pemasakan Pemasakan EMCC EMCC dan dan pencucian pencucian dalam dalam panas panas tinggi. tinggi. 7.
Bagian Bagian pendi pendingi nginan nan dan peng pengelu eluara aran n
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BAB IV CONE FOR ARM SCRAPER DIGESTER
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11
Tabel. Komposis Kimia Stainless Steel 304
Unsur Carbon Manganase Phosphorus
% 0,030 max 2,00 0,045
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12
IV.2 IV.2
Deskr Deskrip ipsi si Op Oper erasi asion onal al Peral Peralata atan n
1. Pengelasa asan adala adalah h Menur Menurut ut We Weld ldin ing g Hand Handboo book, k, pros proses es penge pengela lasa san n adal adalah ah pros proses es penyambungan yang menghasilkan peleburan bahn dan memanasinya hingga suhu yang tepat dengan atau tanpa pemberian tekanan dan dengan atau tanpa, pemakaian bahan bahan
isi Energi Energi
bangki bangki
dapa dibeda dibedakan kan
ber
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13
Jenis sambungan dengan las Iistrik ini adalah merupakan sambungan tetap. > Prinsip-Prinsip Prinsip-Prinsip Las Listrik
Pada dasarnya las listrik yang menggunakan elektroda karbon maupun logam menggunakan tenaga listrik sebagai sumber panas. Busur listrik yang terjadi antara ujung ujung elektr elektroda oda dan benda benda kerja kerja dapat dapat mancap mancapai ai temper temperatu aturr tinggi tinggi yang yang dapat dapat melelehkan sebagian bahan merupakan perkalian antara tegangan listrik (E) dangan
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14
Gambar1. las listrik karbon
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15
2. Plat Platee Ben Bendi ding ng Roll Roll Merupakan proses forming dengan membengkokkan benda kerja. Pada proses bending terdapat parameter yang dinamakan minimum bend radius. Parameter ini menunj menunjukk ukkan an jarak jarak radius radius bending bending yang yang menim menimbul bulkan kan retak retak pada benda benda kerja. kerja. Minimum bend radius berhubungan dengan ketebalan material (thickness), ketebalan ebut menunjukkan pula radius terkecil terkecil pada saat bendin sheet tanpa mengalami mengalami
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3. Mesi Mesin n Ger Geriinda nda
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d). Shaped grinding wheels, untuk memotong alat potong ataupun material yang yang sanga sangatt kera keras, s, seper seperti ti HSS, HSS, mate materi rial al yang yang suda sudah h menga mengala lami mi pros proses es heat heat
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Khurmi, R.S, 2001, Machine Design, Design, Eurasia Publishing House, New Delhi
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