ANIN ENGINEERING

Purification and recycling

The project to increase the capacity of idle thickeners, which can be defined as increasing the capacity of dewatering from waste thickeners, is aimed at providing the water needed for the second phase of the concentration expansion and increasing the water extraction and recovery capacity to more than 75% at the Sarcheshmeh Copper Complex.

Purification and Recycling - Increasing the Capacity of Empty Thickeners

Employer: National Iranian Copper Industries Company

Implementation period: 19 months (2011 – 2012)

Using domestic technology and capabilities, our experts were able to complete the dewatering of the tailings at 20% of the cost announced by similar companies and in less time than expected (19 months instead of 3 years).

In this project, Anin Solids Mechanical Engineers Company was responsible for consulting, high-level supervision and workshop supervision. The project started in 2009 and was completed on time. The execution operations were completed in the last days of 2010 and the thickener was started. The project was commissioned and operated in the early days of 2011.

It was at this stage of the project that the construction of the third phase of the Sarcheshmeh copper concentration complex expansion was approved and its implementation began. In order to provide the water required for this phase of the concentration expansion, arrangements had to be made. The first and simplest solution that came to the client’s mind was to build a sixth thickener. The cost of this work was estimated at around $30 million.

At this stage, the Anin Group changed the course of the project with a new proposal. It was proposed to increase the capacity of the three old tailings thickeners and use new technology to extract more water from the thickeners. Many technical and economic studies were carried out in this regard, and based on the studies carried out, the cost of implementing the project was estimated at less than 7 million euros.

Initially, it was decided that the implementation operations would be carried out on one of the tickers (Ticker No. 3) and, given the successful completion of Ticker 5, it would be handed over to the existing contractor. All implementation operations were carried out again and all devices were updated. Complex issues related to the use of existing equipment to perform a new task were resolved in cooperation with other project elements. Some irregularities and misunderstandings were resolved by using new management methods and finally, in 2014, the project was successfully completed and the capacity of Ticker 3 increased to 1,160 tons of dry matter per hour.

The second phase of the project, with the aim of increasing the capacity of tickers number one and two and making some necessary modifications to the complex, especially ticker number 4, entered the implementation phase in February 2016 after Anin Company completed all necessary studies and held a tender and selected a new contractor.

From the beginning of this project, the decision-makers in the Anin Group decided to use the Agile project management method, and this methodology was used until the end of the project and the completion of all implementation operations. This resulted in the project, which was expected to be completed in 36 months, being completed in only 19 months. Subsequently, all implementation activities were carried out at this stage, and the project was fully commissioned in November 2018.

After the completion of the project, the capacity of dewatering from waste thickeners at the Sarcheshmeh Copper Complex increased by more than two times, while we managed to complete the entire project (in two phases) at a cost of nearly 60% of the estimated cost.

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