Presentasi Prakerin @Antam

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Presentasi mengenai hasil praktik kerja industri (prakerin) yang telah dilakukan selama hampir 3 bulan di PT Antam UBPE Pongkor, Bogor.

Transcript of Presentasi Prakerin @Antam

PRAKTIK KERJA INDUSTRI DI PT. ANTAM TBK UBPE PONGKOR

PRAKTIK KERJA INDUSTRI DI PT. ANTAM TBK UBPE PONGKOR2012/2013Oleh: Arrovi Septian 09.55.06389KEMENTERIAN PERINDUSTRIAN RIPusat Pelatihan dan Pendidikan IndustriSMK-SMAK Bogor

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Kegiatan LaboratoriumVariasi Komposisi Meni Timbel (Pb3O4) dalam Bahan Imbuh Terhadap Hasil Analisis Dengan Menggunakan Metode Fire AssayTugas Khusus - SMAK BogorDasarPerbandingan komposisi meni timbel (Pb3O4) yang baru, dibandingkan dengan perbandingan komposisi standar. Perbandingan komposisi baru akan diterima bila t hitung < t tabel.TujuanSebagai langkah efisiensi pemakaian pereaksi yang berhubungan langsung dengan misi PT. Antam Tbk UBPE Pongkor pada poin ke 2.Tahapan Kerja

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Standar 25 gramSampel 50 gram+ Fluks 150 gramBullion ditimbang dan dipisahkan.Sampel dilebur dengan suhu + 1000 0C selama 40 menit.Sampel dikupelasi dengan suhu + 500 0C hingga terbentuk bullion.

HNO3 1:1Bullion diparting di atas hot plate dengan penambahan HNO3 1:1 sebanyak 1 kali dan dibilas dengan air suling sebanyak 3 kali.Bagan Kerja Penetapan Kadar Emas Secara Fire AssayDikeringkan di atas hot plate.Ditimbang emas murni hasil proses parting.Dihitung kadar emasnya dari sampel yaitu Standar dan Sampel.

No.PerlakuanSelisihBobot Button (gram)Bobot Bullion (gram)3,25(gpt)Standar(gpt)Bobot Sampel (gram)1.39,39600,6658,9210,01501,092.40,66590,6598,7610,01501,25338,90580,6828,8410,01501,17%Recovery88,31Rata-rata1,17N3SD0,08RSD6,84t-hitung7,16t-tabel (=5%)4,30Data 1. Standar - Fluks 3,25t hitung > t tabelData 2. Standar - Fluks 3,50t hitung > t tabelNo.PerlakuanSelisihBobot Button (gram)Bobot Bullion (gram)3,50(gpt)Standar(gpt)Bobot Sampel (gram)1.30,72100,6639,0010,01501,012.32,78030,6599,2410,01500,77338,68090,6479,1610,01500,85%Recovery91,21Rata-rata0,87N3SD0,12RSD13,91t-hitung4,35t-tabel (=5%)4,30No.PerlakuanSelisihBobot Button (gram)Bobot Bullion (gram)3,75(gpt)Standar(gpt)Bobot Sampel (gram)1.40,81930,5429,7210,01500,292.43,89090,6089,4810,01500,53310,37430,4929,8410,01500,17%Recovery96,70Rata-rata0,33N3SD0,18RSD55,55t-hitung1,35t-tabel (=5%)4,30Data 3. Standar - Fluks 3,75t hitung < t tabelNo.PerlakuanSelisihBobot Button (gram)Bobot Bullion (gram)4,00(gpt)Standar(gpt)Bobot Sampel (gram)1.43,68150,6659,6810,01500,332.47,23990,5199,5210,01500,49336,24240,5049,4410,01500,57%Recovery95,40Rata-rata0,46N3SD0,12RSD26,57t-hitung2,30t-tabel (=5%)4,30Data 4. Standar - Fluks 4,00t hitung < t tabelGrafik Perbandingan Perbandingan Komposisi Meni Timbel dalam Bahan ImbuhNo.PerlakuanSelisihBobot Button (gram)Bobot Bullion (gram)3,75(gpt)4,00(gpt)Bobot Sampel (gram)1.10,28143,6958,808,22500,582.10,73123,7178,808,22500,58312,63083,7388,808,22500,584.17,53263,7448,808,24500,565.18,53873,8558,808,24500,566.16,86363,8278,808,24500,567.14,89183,7168,808,24500,568.16,33733,7738,808,24500,569.17,83223,7678,848,26500,5810.12,35963,7628,888,28500,60Rata-rata0,57N10SD0,014RSD2,45Data 5. Sampel Conveyor MHSFluks 3,75-Fluks 4,00Grafik Perbandingan Sampel Conveyor MHSFluks 3,75-Fluks 4,00SimpulanVariasi fluks dengan perbandingan baru yakni 3,75 memberikan kadar (gpt) yang lebih tinggi dalam analisis kadar emas dengan metode fire assay.Saran Dilakukan penggantian cawan lempung baru setiap memulai peleburan, serta suhu yang stabil ditungku peleburan.ThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThankYouThanks a lot!!!!!!!!ThankYou