HARJO, MUHAMAD MUCHSON BUDI (2016) KAJIAN TEKNIS UNIT PEREMUK BATU ANDESIT GUNA MENINGKATKAN PRODUKSI SPLIT DI PABRIK PEREMUK PT. HOLCIM BETON, KECAMATAN WINONGAN, KABUPATEN PASURUAN, JAWA TIMUR. Other thesis, UPN "VETERAN" YOGYAKARTA.
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Abstract
RINGKASAN
Kegiatan pengolahan batu andesit di pabrik peremuk PT. Holcim Beton
Pasuruan yang terletak di Desa Jeladri, Kecamatan Winongan, Kabupaten
Pasuruan, Provinsi Jawa Timur.Terdiri dari tiga tahap, yaitu primary crushing,
secondary crushing, dan tertiary crushing. Target produksi batu split andesit pada
tahun 2012 sebesar 450.000ton/tahun dengan produk akhir terdiri dari 4 macam
ukuran,yaitu (-28 +14)mm sebesar ≥ 40%, (-14 +10)mm sebesar ≥ 20%, (-10
+5)mm sebesar ≤ 20% dan -5mm(abu batu) sebesar ≤ 20% dengan toleransi 5%.
PT. Holcim Beton Pasuruan ingin meningkatkan produk ukuran (-14 +10)mm
yang saat ini tinggi permintaan dan mengurangi jumlah abu batu yang kurang
diminati konsumen. Oleh karena itu perlu dilakukan kajian terhadap masingmasing
alat pada pabrik peremuk, apakah dengan alat yang ada mampu
menghasilakan persentase distribusi yang direcanakan atau alat yang ada tidak
mampu menghasilkan distribusi yang direncanakan.
Penelitian ini bertujuan untuk meningkatkan produk ukuran (-14 +10)mm
yang saat ini hanya13,04% dan mengurangi tingginya jumlah produksi abu batu
yang jauh melebihi target produksi sebesar 33,17%.
Hasil penelitian di lapangan didapatkan total umpan dari tambang 216
ton/jam dengan perincian 13,75 ton/jam pengotor dan 202,25 ton/jam produk
akhir. Adapun perincian produk akhir ukuran (-28 +14)mm 37,37%, (-14 +10)mm
13,04%, (-10 +5)mm 16,42% dan -5mm 33,17%. Sehingga diperlukan upaya
perbaikan terhadap alat peremuk agar distribusinya dapat tercapai.
Ada tiga upaya alternatif perbaikan secara teoritis dengan cara
memperkecil ukuran close side setting (css) gyratory crusher dari 42mm menjadi
32mm, kapasitas design 206,18 ton/jam dan effektifitas 98,08%. Adapun css
impact crusher dari 20mm diperbesar sebagai kombinasi alternatif yaitu:
a) Alternatif I css 40mm, kapasitas design 164,25ton/jam dan effektifitas
40,69%. Perincian produk akhir (-28 +14)mm 45,12%, (-14 +10)mm
14,94%, (-10 +5)mm 17,28% dan -5mm 22,66%.
b) Alternatif II css 30mm, kapasitas design 153ton/jam dan effektifitas
43,68%.Perincian produk akhir (-28 +14)mm 43,37%, (-14 +10)mm
15,08%, (-10 +5)mm 17,34% dan -5mm 23,21%.
c) Alternatif III css 25mm, kapasitas design 147,37ton/jam dan effektifitas
45,35%. Perincian produk akhir (-28 +14)mm 43,44%, (-14 +10)mm
15,28%, (-10 +5)mm 17,27% dan -5mm 24,01%.
Hasil akhir ketiga alternatif diatas didapatkan dari pembacaan grafik hasil
peremukan dari setiap alat, kemudian dikalikan nilai effisiensi screen setiap deck.
Disarankan menggunnakan alternatif III karenadistribusi produk akhir yang
dihasilkan paling mendekati target distribusi yang direncanakan.
v
ABSTRACT
The processing activities of andesite in PT. Holcim Beton Pasuruan
crusher factory where located in Jeladri village, Desa Jeladri, Kecamatan
Winongan, Kabupaten Pasuruan, Jawa Timur Province. There were three steps of
processing activities which are Primary Crushing, Secondary Chrusing, and
Tertiary Crushing. The productive target of andesite split in 2012 was 450.000
tonnes/year with the final production consist of 4 measurements which are (28+14)mm
≥ 40%, (-14+10)mm ≥ 20%, (-10+5)mm ≤ 20% and -5mm (stone
ashes) ≤ 20% by tolerance 5%. PT. Holcim Beton Pasuruan would like to improve
its production by the measurement (-14+10)mm in which at the moment had huge
demand and decreased the stone ashes that are not demanded by the consumers.
Thus, we need to analyze toward each tools at the crusher company whether the
existance tools would be able to reach distribution percentage that had been
planned or the existence tools would not be able to reach the planned distribution.
This research’s purposes is to improve the products measurement (-14 +
10)mm in which at the moment only 13,04% and reduced the amount of the stone
ashes production that over the target of production around 33,17%.
The result of this research in the field had found that the total feed from
the mine was 216 tphwith the specification 13,75 tph tailing and 202,25 tph for
the final products. The final specification measurement was (-28+14)mm,
37,37%, (-14+10)mm 13,04%, (-10+5)mm, 16,42% and -5mm 33,17%.
There were three alternative efforts for the theoritical improvemnets by
minimizing the close side setting (CSS) gyratory crusher measurement from
42mm up to 32mm, the design capacity 206,18 tonnes/hour and the effectivity
reached 98,08%. In addition toward the CSS impact crusher from 20mm
maximize as alternative combination, such as:
a) Alternative I, CSS 40mm, design capacity 164,25 tonnes/hour and the
effectivity 40,69%. Final products specifications (-28+14)mm 45,12%,
(-14+10)mm 14,94%, (-10 +5)mm17,28% and -5mm22,66%.
b) Alterbative II, CSS 30mm, design capacity 153 tonnes/hour and the
effectivity 43,68%. Final products specification (-28 +14)mm43,37%, (14
+10)mm15,08%,
(-10
+5)mm17,34%
and
-5mm23,21%
c) Alternative III, CSS 25mm, design capacity 147,37 tonnes/hour and the
effectivity 45,35%. Final products specification (-28 +14)mm43,44%, (14
+10)mm15,28%,
(-10
+5)mm17,27%
dan
-5mm24,01%.
The final result from the three alternatives above. It had found from the
graphic observation of the tools crushers, then it multiply with the screen
efficiency score in every deck. It is suggested to use the alternative III because the
final product distribution that had been produced was the closest to the planned
distribution target.
vi
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > T Technology (General) |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment |
| Depositing User: | Sarimin Sarimin |
| Date Deposited: | 12 May 2016 02:14 |
| Last Modified: | 12 May 2016 02:14 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/716 |
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