Pengenalan Cara Kerja Belt Conveyor Dan Bagian - Bagiannya

Belt conveyor dapat digunakan untuk mengengkut material baik yang berupa “unit load” atau “bulk material” secara mendatar ataupun miring.
Yang dimaksud dengan “unit load” adalah benda yang biasanya dapat dihitung jumlahnya satu per satu, misalnya kotak, kantong, balok dll. Sedangkan Bulk Material adalah material yang berupa butir-butir, bubuk atau serbuk, misalnya pasir, semen dll.

Bagian – bagian terpenting Belt conveyor adalah :

a. Belt : Fungsinya adalah untuk membawa material yang diangkut.
b. Idler : Gunanya untuk menahan atau menyangga belt.
Menurut letak dan fungsinya maka idler dibagi menjadi :

• 1. Idler atas yang digunakan untuk menahan belt yang bermuatan.

• 2. Idler penahan yaitu idler yang ditempatkan ditempat pemuatan.

• 3. Idler penengah yaitu yang dipakai untuk menjajaki agar belt tidak bergeser dari jalur yang seharusnya.

• 4. Idler bawah Idler balik yaitu yang berguna untuk menahan belt kosong.

c. Centering Device : Untuk mencegah agar belt tidak meleset dari rollernya.
d. Unit Penggerak (drive units) : Pada Belt conveyor tenaga gerak dipindahkan ke belt oleh adanya gesekan antara belt dengan “plulley” penggerak (drive pully), karena belt melekat disekeliling pully yang diputar oleh motor.
e. Pemberat (take-ups or counter weight) : Yaitu komponen untuk mengatur tegangan belt dan untuk mencegah terjadinya selip antara belt dengan pully penggerak, karena bertambah panjangnya belt.
f. Bending the belt
Alat yang dipergunakan untuk melengkungkan belt adalah

• - Pully terakhir atau pertengahan

• - Susunan Roller-roller

• - Beban dan adanya sifat kelenturan belt.

g. Pengumpan (feeder) : Adalah alat untuk pemuatan material keatas belt dengan kecepatan teratur.   
h. Trippers : Adalah alat untuk menumpahkan muatan disuatu tempat tertentu.   
i. pembersih Belt (belt-cleaner) : Yaitu alat yang dipasang di bagian ujung bawah belt agar material tidak melekat pada belt balik.
j. Skirts : Adalah semacam sekat yang dipasang dikiri kanan belt pada tempat pemuatan (loading point) yang gterbuat dari logam atau kayun dan dapat dipasang tegak atau miring yang gunanya untuk mencegah terjadinya ceceran.
k. Holdback : Adalah suatu alat untuk mencegah agar Belt conveyor yang membawa muatan keatas tidak berputar kembali kebawah jika tenaga gerak tiba-tiba rusak atau dihentikan.
l. Kerangka (frame) : Adalah konstruksi baja yang menyangga seluruh susunan belt conveyor dan harus ditempatkan sedemikian rupa sehingga jalannya belt yang berada diatasnya tidak terganggu.
m. Motor Penggerak : Biasanya dipergunakan motor listrik untuk menggerakkan drive pulley. Tenaga (HP) dari motor harus disesuaikan dengan keperluan, yaitu :

• 1. Menggerakkan belt kosong dan mengatasi gesekan-gesekan anatara idler dengan komponen lain.

• 2. Menggerakkan muatan secara mendatar.

• 3. Mengankut muatan secara tegak (vertical).

• 4. Menggerakkan tripper dan perlengkapan lain.

• 5. Memberikan percepatan pada belt yang bermuatan bila sewaktu-waktu diperlukan.

Job Vacancy Juni 2012 PT. Chevron

Chevron is one of the world's largest integrated energy companies. Headquartered in San Ramon, California. We conduct business worldwide. We are engaged in every aspect of crude oil and natural gas industry, including exploration and production, manufacturing, marketing and transportation, chemicals manufacturing and sales, geothermal energy, and power generation. We're also investing in renewable energy and advanced technologies.

We are seeking experienced, energetic and attentive candidates to be located in Chevron operation areas for positions with requirements below:

Land Officer (Ext-153/LGL/EXP/CPI/LAW/2011)
Riau - Duri

Requirements:

Qualification :
* Have a good leadership and communication, both in Bahasa or English
* Desiring to work in a multicultural and diverse organization
* Strong in seeking learning activities
* Able to establish effective relationships with people of other culture and backgrounds
* Understand of Indonesian laws and regulation on land and forestry,
* Minimum 3 years in handling land acquisition/land dispute resolution, permitting and other related activities
* Has excellent negotiation skills, strong integrity, good personality/ behavior
* Willing to relocate to one of Chevron operations locations (East Kalimantan/Riau)


Education Level : S1 / D4

Minimum GPA : 2.75

Discipline :
* Law
* Public Relation
* Social and Politic Science
* Environmental Engineering
* Industrial Engineering
* Communication
* Forestry

Open For : All Indonesian People

Work Area : Sumatra

Work Location : Duri

Work Schedule : 5-2

Minimum Relevant Experience : 3
For more information and how to apply, Please directly go into our website at

www.chevron.formycareer.com

Only application submitted through www.chevron.formycareer.com will be processed.
All applications are appreciated and will be treated confidentially. Only qualified, short-listed applicants will be invited for further process. This vacancy is eligible only for Indonesia citizen.

Pengetahuan Dasar Tentang Drilling Rig

A drilling rig is a machine which creates holes in the ground. Drilling rigs can be massive structures housing equipment used to drill water wells, oil wells, or natural gas extraction wells, or they can be small enough to be moved manually by one person. They sample sub-surface mineral deposits, test rock, soil and groundwater physical properties, and also can be used to install sub-surface fabrications, such as underground utilities, instrumentation, tunnels or wells.

Drilling rigs can be mobile equipment mounted on trucks, tracks or trailers, or more permanent land or marine-based structures (such as oil platforms, commonly called 'offshore oil rigs' even if they don't contain a drilling rig). The term "rig" therefore generally refers to the complex of equipment that is used to penetrate the surface of the Earth's crust.

Drilling rigs can be:

• Small and portable, such as those used in mineral exploration drilling, water wells and environmental investigations.
• Huge, capable of drilling through thousands of meters of the Earth's crust. Large "mud pumps" circulate drilling mud (slurry) through the drill bit and up the casing annulus, for cooling and removing the "cuttings" while a well is drilled. Hoists in the rig can lift hundreds of tons of pipe. Other equipment can force acid or sand into reservoirs to facilitate extraction of the oil or natural gas; and in remote locations there can be permanent living accommodation and catering for crews (which may be more than a hundred). Marine rigs may operate many hundreds of miles or kilometres distant from the supply base with infrequent crew rotation or cycle

 There are many types and designs of drilling rigs, with many drilling rigs capable of switching or combining different drilling technologies as needed. Drilling rigs can be described using any of the following attributes:

By power used

• Mechanical — the rig uses torque converters, clutches, and transmissions powered by its own engines, often diesel
• Electric — the major items of machinery are driven by electric motors, usually with power generated on-site using internal combustion engines
• Hydraulic — the rig primarily uses hydraulic power
• Pneumatic — the rig is primarily powered by pressurized air
• Steam — the rig uses steam-powered engines and pumps (obsolete after middle of 20th Century)

By pipe used

• Cable — a cable is used to raise and drop the drill bit
• Conventional — uses metal or plastic drill pipe of varying types
• Coil tubing — uses a giant coil of tube and a downhole drilling motor

By height

(All rigs drill with only a single pipe. Rigs are differentiated by how many connected pipe they are able to "stand" in the derrick when needing to temporarily remove the drill pipe from the hole. Typically this is done when changing a drill bit or when "logging" the well.)

• Single — can pull only single drill pipes. The presence or absence of vertical pipe racking "fingers" varies from rig to rig.
• Double — can hold a stand of pipe in the derrick consisting of two connected drill pipes, called a "double stand".
• Triple — can hold a stand of pipe in the derrick consisting of three connected drill pipes, called a "triple stand".

By method of rotation or drilling method

• No-rotation includes direct push rigs and most service rigs
• Rotary table — rotation is achieved by turning a square or hexagonal pipe (the "Kelly") at drill floor level.
• Top drive — rotation and circulation is done at the top of the drill string, on a motor that moves in a track along the derrick.
• Sonic — uses primarily vibratory energy to advance the drill string
• Hammer — uses rotation and percussive force (see Down-the-hole drill)

By position of derrick

• Conventional — derrick is vertical
• Slant — derrick is slanted at a 45 degree angle to facilitate horizontal drilling

by : wikipedia

Lowongan IT Engineer Chevron Mei 2012

Chevron is one of the world’s largest integrated energy companies. Headquartered in San Ramon, California. We conduct business worldwide. We are engaged in every aspect of crude oil and natural gas industry, including exploration and production, manufacturing, marketing and transportation, chemicals manufacturing and sales, geothermal energy, and power generation. We’re also investing in renewable energy and advanced technologies.

We are seeking experienced, energetic and attentive candidates to be located in Chevron operation areas for positions with requirements below:

IT Engineer (Ext-196/IT/EXP/CPI/P&T/2012)
Riau – Rumbai
Education Level : S1 / D4
Minimum GPA : 2.75

Discipline :
* All Engineering
Open For : All Indonesian People
Work Area : Sumatra
Work Location : Rumbai
Work Schedule : 5-2
Employment Status : Permanent
Minimum Relevant Experience : 5 year(s)

Requirements:
* Have minimum 5 years experienced in risk management, IT security and management or IT auditing.
* Have strong technical knowledge of and experience of UNIX (SUN and Linux), Windows, Virtual Machine technology, network components and firewalls is required. In addition knowledge of and experience with web application, databases and PeopleSoft and SAP will be an advantage.
* Experience with automated tooling data analysis is also welcome.
* Good analytic skills and risk awareness.
* Good communication skills, oral as well as written (Able to draft reports in a structured and logical manner).
* Be able to communicate and liaise with senior management.
* Focus on customer needs and expectations while remaining focussed on risk and maintaining independence.
* Work well within a team and share knowledge and experience.
* Fluent in English

For more information and how to apply, Please directly go into our website at
www.chevron.formycareer.com

Only application submitted through www.chevron.formycareer.com will be processed.
All applications are appreciated and will be treated confidentially. Only qualified, short-listed applicants will be invited for further process. This vacancy is eligible only for Indonesia citizen.

Job Vacancy Mei 2012 PT. Arutmin Indonesia

PT Arutmin Indonesia; 6 positions

1. MINE PLAN ENGINEER (Code: MPE)
Requirements:
• Hold bachelor degree in Mining Engineering from reputable university
• Have minimum 2 years experience as mine engineer
• Possess good skill in mining software (Minescape, XPAC)

2. GRADUATE DEVELOPMENT PROGRAM
This is Staff position for fresh graduate candidates. Training and development programs and mentoring at mine site will be provided for the successful candidate. The positions are:
a. Mine Engineer GDP (Code: ME-GDP)
b. Logistic and Quality Engineer GDP (Code: LQ-GDP)
c. Coal Technology Specialist GDP (Code: CST-GDP)
d. Shipping Program Specialist GDP (Code: Ship-GDP)

Requirements:
• Fresh Graduate from Mining Engineering (position A); Chemical Engineering, or Industrial Engineering, or Metallurgy-Material Engineering (position B, C, D).

3. MINE OPERATION ENGINEER (Code: MOE)
Requirements:
• Hold bachelor degree in Mining Engineering from reputable university
• Have minimum 2 years experience as mine engineer

4. SENIOR GEOTECHNICAL ENGINEER
Requirements:
• Hold bachelor degree in Mining Engineering, or Geological Engineering, or Civil Engineering
• Have minimum 3 years experience dealing with geotechnical engineering
• Possess good skill using geotechnical software such as Slope/W, Galena, Wedge

5. BERTHING MASTER (Code: BM)
Requirements:
• Min. Degree in Merchant Marine Academy and holding ANT II (ANT I is preferable)
• Minimum 3 years sea experiences with minimum chief officer position
• Have maritime Indonesian Pilot certificate is preferable
• Strong knowledge of about international marine regulation, ISM code and ISPS code
• Good understanding on global coal business will be an advantage

6. MINING FOREMAN (Code: M-FM)
Requirements:
• Minimum diploma degree from any major (Mining or Geological Engineering is preferable)
• Min. 5 years experience as Mining Foreman or any related field
General requirements for all position:
• Excellent written and oral communication skills, ideally in both English and Indonesian to liaise with internal/external contacts
• Strong interpersonal and leadership skills
• Capable to work in minimum supervision, willing to work hard and under pressure, having high integrity, dedicated, and team work oriented
• Have a high commitment to PTAI standards in environment, safety, business ethic and good corporate governance

All applications will be kept strictly confidential and only short-listed candidates will be contacted. Attractive compensation & benefits will be offered to the successful candidate. Please send your application and resume in English & recent photograph not later than 14 (fourteen) days from the date of this advertisement to:

RECRUITMENT
Email to hrd@arutmin.com
Please put the position code at the email subject.
For further information, please see our website: www.arutmin.com
Expiry date: May 15, 2012

Bursa Kerja Mei 2012 PT. Nusa Halmahera Minerals

PT. Nusa Halmahera Minerals is a gold mining and exploration company, operating a Contract of Work (COW) in the island of Halmahera, North Maluku. The company is a joint venture between Newcrest Mining Limited and PT Aneka Tambang.

The Company is attending to seek 9 (nine) Fresh Graduates from all universities in Indonesia, focusing on:
1. Environmental Science (ES)
2. Geology (Geo)
3. Mining Engineer (ME)
4. Metallurgy (Met)
5. Finance & Accounting (FA)
6. Electrical (EL)
7. Occupational Health and Safety (OHS)

Requirements
• SI graduated from related discipline
• GPA mm 3.00 in a scale of 4
• Mustbegraduatedin20ll or2012
• English comprehension both oral and written
• Good Computer skills especially Microsoft Office Successfully pass the series of test (including Psychological Assessment)
• Willing to be bonded with two years contract and located at remote site
• Committed to Implement the 5 (five) Principles of the Newcrest Values i.e. “Work Together, Care about People, Honesty and Integrity, Innovation & Problem Solving, High Performance”

If you believe you have the required and knowledge to undertake these roles, please send the application and resume with code reference to the following address before 28 May 2012:

PT Nusa Halmahera Minerals
recruitment@nhm.co.id

Lowongan PT. Pertamina Geothermal Energy April 2012

Pertamina Geothermal Energy (PGE), a subsidiary of PT Pertamina (Persero), established since 2006 has been mandated by the government to develop a working area 15 Commercial Geothermal in Indonesia. Companies that provide energy without pollution, 90% owned by PT Pertamina (Persero) and 10% by PT Pertamina dimilii Venture Fund.

New era begins with the inauguration of geothermal energy Geothermal Field Kamojang on January 29, 1983 and was followed by the operation of Geothermal Power Plant (PLTP) Unit-1 (30MW) on February 7, 1983, and five years later the two units operate at their capacity each of 55 MW. On the island of Sumatra for the first time operate Monoblock 2 MW in the Sibayak-Brastagi as the first Power Plant in August 2001 and the first 20 MW geothermal power plants operating in the area Lahendong.

Over time the Government through the Presidential Decree. 76/2000 revoked the previous decree and enforce the Law. 27/2003 on geothermal, where PT Pertamina no longer have a monopoly in the exploitation of geothermal energy, but sam with other geothermal business in Indonesia.
In implementing these laws Pertamina has returned 16 Commercial Work Area (WKP) Geothermal to the Government of 31 WKP given to manage.
PT Pertamina Geothermal Energy are seeking for talented professionals to join as following positions :
1. Senior Electrial Engineer (ES)
2. Senior Mechanical Engineer (MS)
3. Senior Proces Engineer (PE)
4. Senior Instrument & Control Engineer (ICE)
5. Senior Civil Engineer (CE)
6. Senior Piping Engineer (PIE)
7. Senior QA/QC Engineer (QE)

Special Requirements
* Bachelor degree in electrical engineering for ES
* Bachelor degree in mechanical engineering for MS
* Bachelor degree in chemical or mechanical engineering for PE
* Bachelor degree in physics or electronic engineering for ICE
* Bachelor degree in civil engineering for CE
* Bachelor degree in mechanical engineering for PIE
* Bachelor degree in mechanical for QE
* 20 MW min equivalent power plant (geothermar power plant, CFPP, or CCPP) or refinery processing/petrochemical facilities experience with scope of work : design, O&M, and consultant
General Requirements
* Max age 45 years old
* Min 8 years experiences
* Excellent health condition
* Fluent in English both oral & written
* Computer literate with excellent MS Office ability (including MS Project)
* Willingnes to work in remote area, location : Garut, Tasikmalaya (West Java), & Lahendong (North Sulawesi)

Send your complete resume (application form & CV) to :
PT Pertamina Geothermal Energy
Menara Cakrawala Lt. 8
Jl MH Thamrin 9 Jakarta Pusat 10340

The successful candidates will be contracted on project based
Only shortlisted candidates will be notified
Lowongan Pertamina Geothermal Energy Closing date 29 April 2012