PCL-849

PCL-849
PCL-849
PCL-849

　過程控制和優化解決方案幫助New Gold公司實現產量提升 2%。
　　當前，各地的採礦企業都面臨著提高生產力的挑戰。精簡運營流程並優化自動化與控制過程，為採礦企業在當前市場競爭中開辟了一條達成生產目標的道路。
　　New Gold公司的 Peak Gold 礦場位於澳大利亞新南威爾士州中西部科礦區，對地下的金礦和銅礦進行開採作業。該礦場所產金銀合質金主要銷往珀斯鑄幣廠，銅精礦則銷往亞洲市場。礦場擁有五座商用現役礦山和一家銅金礦加工廠。Peak Gold 礦場十分重視性、生產率及環境保護，對於技術的投資可謂不遺餘力。
　　為優化 Peak Gold 選礦廠的生產率和過程控制，Peak Gold 採用了羅克韋爾自動化及礦物加工解決方案提供商 Manta Controls 的解決方案，成功提高了生產率，實現了成本節約同時改善了環保效果。
　升級提升機驅動與控制係統
　　在改造選礦廠之前，羅克韋爾自動化係統和解決方案業務團隊先升級了 Peak Gold 礦場的提升機驅動與控制係統。
　　Peak Gold 採用 814kW 提升機運輸員工和物料，所以，確保提升機的性與可靠性至關重要。
　　據羅克韋爾自動化的解決方案顧問 Michael Gres 稱，“基於羅克韋爾自動化非常成熟的礦井提升機的、控制和驅動係統，們為Peak Gold打造了一套定制化的礦井提升機驅動控制解決方案。該工程解決方案由們位於新南威爾士州 (NSW)蘭科夫的當地驅動係統工程與生產團隊與 Peak Gold 攜手完成，方案的各方面都按客戶的需求進行了精心設計。”
　　升級提升機可確保其符合的標準，此外，還可使用通用的控制與通信平臺簡化維護作業。項目的下一個階段是通過優化 Peak Gold 選礦廠來提高礦場的生產率。
　　半自磨機(SAG)控制
　　半自磨機(SAG)是選礦作業中的關鍵組件，同時，也是非常難以控制的過程。這種過程中存在大量的可變因素，而主要目標則是程度地提高產量。據 Peak Gold 礦場經理 Vivian Beehan 介紹，“為改善生產率和過程控制，們開始著手優化 Peak Gold 選礦工廠。”
　　從 Peak、Perseverance 和 N e w Occidental 礦體中出產的礦石均在地下進行破碎，再吊升至地面礦堆並終輸往半自磨機給料傳送帶。而從 New Cobar 和 Chesney 出產的礦石則拖運至 Peak，並在那裏通過單獨的料鬥將其送入半自磨機給料傳送帶。
　　“現成的標準控制係統並不足以有效地改善選礦廠的產量和控制，”羅克韋爾自動化新南威爾士州銷售經理 Sean Smith 表示。們提供的解決方案採用羅克韋爾自動化 ControlLogix? 的先進控制與編程功能，並集成了 Manta Controls? 的先進控制係統Manta Cube?。
　　“們花了 18 年的時間來完善 ‘Manta Cube’，現在，們能夠提供一套絕妙的控制係統，這種控制係統可充分利用 ControlLogix 平臺的先進過程控制功能，從而使過程控制再上一個臺階，”Manta Controls 總經理 John Karageorgos 表示。
　　採用先進控制與過程優化解決方案後，Peak Gold 的產量已提高兩個百分點。這相當於每年增產 18,000 噸，即每年增產 2000 盎司黃金。
　　“該解決方案延長了磨機襯裏的使用壽命，有助於提高磨機產量。同時延長了更換襯裏的時間間隔，現在們每年只需更換三次襯裏，而原來則需要更換四次，節省了大量的成本。”
　　減少消耗
　　礦石經過半自磨機加工後，在尼爾森選礦機的重力選礦回路中對金銀進行回收，再於強化浸出反應器中進一步汰選，後在燃氣爐中熔煉電解沉積物和礦漿，從而產出合質金錠。還可以採用第三種方法來回收金銀，即在槽浸回路中化浸出。產生的礦漿即可熔煉為合質金錠。
　為縮減成本並改善環境影響，們將Manta的“Cyanide Leach Cube”引入了 ControlLogix 控制係統，以此優化浸出在 Peak Gold 現場尾礦濃密機上裝配了智能驅動器。
　　回路中化係統的相關控制。由此實現了浸出回路的先進過程控制，並顯著減少了的用量。 “從 2013 年 1 月初到 2013 年 12 月 ， 加工每噸礦石所用的 ，已從 1.8 千克左右減少至 1.45 千克左右，”Beehan 表示。
　　“鑒於每噸的成本高達 4000 美元左右，減少的用量可以節省大量成本。此外，由於用量減少，浸出回路中的黃金回收量也額外增加了 1800 盎司。”

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