KAJIAN TEKNIS PENANGANAN AIR ASAM TAMBANG MENGGUNAKAN PH ADJUSTER DAN KAPUR TOHOR DI KPL PIT 3 BARAT STOCKPILE PT. BUKIT ASAM (PERSERO), TBK TANJUNG ENIM SUMATERA SELATAN

AKBAR, FAISAL and Handayani, Rr Harminuke Eko (2018) KAJIAN TEKNIS PENANGANAN AIR ASAM TAMBANG MENGGUNAKAN PH ADJUSTER DAN KAPUR TOHOR DI KPL PIT 3 BARAT STOCKPILE PT. BUKIT ASAM (PERSERO), TBK TANJUNG ENIM SUMATERA SELATAN. Undergraduate thesis, Sriwijaya University.

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Abstract

Acid water treatment at PT. Bukit Asam (Persero) Tbk is done using active and passive method. The active management by using chemical reagents such as lime tohor, and pH adjuster. In one of the settling pond located in the mining licence West Banko Mine , there is a settling pond that specializes in handling acid water from main sump Pit 3 West Galian Baru, the West 3 Pit MPW Stockpile. Currently the company uses lime (CaO) in the West Settling Pond 3 Stockpile in active mine acid treatment. The advantages of using lime alone is the cost of cheap use, safe for operators in its handling and easy to obtain. However, the use of lime is still a deficiency such as packaging that is easily damaged, dusty because it is generally powdered, easy to harden and leave sediment at the bottom of the channel. While the use of pH adjuster for acid mine treatment has some advantages such as liquid-soluble pH adjuster which dissolves quickly, so it does not require mixers, leaving no sediment, and a lowered pH is more stable. The mine acid samples used for the jartest test are useful for knowing lime ratios or pH adjusters, taken on settling pond inlet channels. The required lime ratio is 0,15 gr for 500 ml of acidic acid from pH 3,08 to 6,22. The requirement per month for the average discharge per year 301.800 L / hr is 57.040,2 Kg / Month. The required pH adjuster ratio is 0,11 ml for 500 ml of acidic acid from pH 3,08 to 6,16. The requirement per month for the average discharge per year 301.800 L / hr is 8.366,4 L / month. The mine acid treatment technique in the West Pit 3 Stockpile Settling Pond using lime is carried out by means of sowing the inlet channel so that it will cause sediment, causing periodic dewatering to have the limestone removed and the settling pond capacity not reduced, while the pH adjusted by using the pH adjuster directly tedmond to the inlet line so that its use will not cause precipitate because it is liquid and is very effective when used if the settling pond does not use lime mixer.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	acid water wine, lime, pH adjuster, settling pond
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN1-997 Mining engineering. Metallurgy
Divisions:	03-Faculty of Engineering > 31201-Mining Engineering (S1)
Depositing User:	Users 12 not found.
Date Deposited:	13 Sep 2019 04:06
Last Modified:	13 Sep 2019 04:06
URI:	http://repository.unsri.ac.id/id/eprint/7321

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