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Namibia Critical Metals Successfully Completes Optimization on Hydrometallurgical Flowsheet for the Lofdal Heavy Rare Earth Deposit

Namibia Critical Metals Successfully Completes Optimization on Hydrometallurgical Flowsheet for the Lofdal Heavy Rare Earth Deposit

納米比亞關鍵金屬成功完成了對洛夫達爾重稀土礦牀溼法冶金流程圖的優化
Accesswire ·  05/13 09:00

HALIFAX, NS / ACCESSWIRE / May 13, 2024 / Namibia Critical Metals Inc. ("Namibia Critical Metals" or the "Company" or "NCMI") (TSXV:NMI)(OTCQB:NMREF) is pleased to announce key results of the optimization test program in preparation for scale-up hydrometallurgical tests for its "Lofdal 2B-4" heavy rare earth project.

新南威爾士州哈利法克斯/ACCESSWIRE/2024年5月13日/納米比亞關鍵金屬公司(“納米比亞關鍵金屬” 或 “公司” 或 “NCMI”)(多倫多證券交易所股票代碼:NMI)(OTCQB: NMREF)欣然宣佈優化測試計劃的關鍵結果,爲其 “Lofdal 2B-4” 重稀土項目的擴大溼法冶金測試做準備。

Tests were conducted on a 93 kg concentrate sample produced by a flotation pilot plant at SGS Lakefield, using run-of-mine material from the Lofdal Area 4 starter pit. The pilot plant flotation program confirmed the performance of the Lofdal beneficiation flowsheet in a continuous operation and demonstrated the ability to produce an upgrade mineral concentrate. Previous test on bulk flotation concentrate showed promising results in terms of REE extraction and reduced reagent consumption. The current hydrometallurgical testing aims to replicate the previous result using the concentrate produced from the flotation pilot plant. Preliminary confirmatory tests showed consistent high REE dissolution and established a relation between sulphation temperature, REE extraction and iron co-extraction.

對SGS Lakefield的浮選試點廠生產的93千克濃縮物樣品進行了測試,該樣品使用了來自洛夫達爾4區起動坑的原始礦物質。試點工廠的浮選計劃證實了洛夫達爾選礦流程表在連續運行中的表現,並證明了生產升級版礦物濃縮物的能力。先前對散裝浮選濃縮物的測試顯示,在稀土提取和減少試劑消耗方面,結果令人鼓舞。當前的溼法冶金測試旨在使用浮選試驗廠生產的濃縮物複製先前的結果。初步的確認性測試顯示稀土元素溶出度一直很高,並確定了硫酸化溫度、稀土元素提取和鐵共萃取之間的關係。

Key results include:

主要結果包括:

  • Low (~ 300°C) temperature sulphation yields higher REE dissolution, but also higher iron dissolution. High iron dissolution leads to high reagent consumption to remove the iron in the leach solution.
  • High (~ 600°C) temperature sulphation proved to be beneficial in suppressing iron dissolution into the leach solution. The process was able to reduce iron dissolution from around 60% (low temperature bake) to around 30%. This leads to a net reduction in MgCO3 consumption. However, some REE losses were observed at these high temperature bake conditions.
  • Impurity removal process was shown to be successful in removing the iron and thorium and at minimum REE losses whether from high temperature or low temperature sulphation conditions.
  • 低溫(~300°C)硫酸化產生更高的稀土溶出度,但也會產生更高的鐵溶出度。高鐵溶出度導致去除浸出溶液中的鐵的試劑消耗量高。
  • 事實證明,高溫(約 600°C)硫酸化有利於抑制鐵溶液中的溶解。該工藝能夠將鐵的溶出度從大約 60%(低溫烘烤)降低到 30% 左右。這導致 MGCo 的淨減少3 消費。但是,在這些高溫烘烤條件下觀察到一些 REE 損失。
  • 事實證明,無論是在高溫還是低溫硫酸化條件下,雜質去除過程都能成功去除鐵和釷,並將稀土損耗降至最低。

Darrin Campbell, President of Namibia Critical Metals, stated:

納米比亞關鍵金屬總裁達林·坎貝爾表示:

"I am very pleased to see the hydrometallurgical optimization test work completed with positive results. The unusual primary xenotime mineralization forced us to practically pioneer all beneficiation steps. During our recent visit to the SGS test facilities at Lakefield we were impressed with how our lead consultants at SGS Canada master the optimization of the earlier developed flowsheet. Based on the data, it seems we see further significant reduction of OPEX compared to the previous financial estimations."

“我很高興看到溼法冶金優化測試工作完成並取得了積極成果。不尋常的初級異時礦化迫使我們幾乎開創了所有選礦步驟。在我們最近訪問萊克菲爾德的SGS測試設施期間,我們的加拿大SGS首席顧問如何掌握對先前開發的流程表的優化給我們留下了深刻的印象。根據數據,與之前的財務估計相比,我們似乎看到運營支出進一步大幅下降。”

Optimization of Hydrometallurgical Flowsheet

溼法冶金流程的優化

Test-work was conducted at SGS Lakefield from October 2023 to April 2024 in preparation of acid sulphation scale-up test-work planned for Q2 2024.

測試工作於 2023 年 10 月至 2024 年 4 月在 SGS 萊克菲爾德進行,爲計劃於 2024 年第二季度進行的酸硫化放大測試工作做準備。

Flotation concentrate samples with varying iron levels (by applying magnetic separation) were used in hydrometallurgical tests. The results showed that higher or lower iron levels in the flotation concentrate were equally manageable in the sulphation process.

溼法冶金測試中使用了鐵含量不同的浮選濃縮物樣品(通過磁分離)。結果表明,在硫酸化過程中,浮選精礦中較高或較低的鐵含量同樣可以控制。

Low temperature acid sulphation led to higher REE extraction (and high iron dissolution).

低溫酸硫化導致更高的稀土元素提取量(和較高的鐵溶出度)。

High temperature sulphation, on the other hand, showed that iron dissolution could be reduced leading to a reduction in magnesium carbonate required for iron precipitation in the impurity removal step. Preliminary confirmatory hydrometallurgical testing at high temperature sulphation using the concentrate produced from flotation pilot plant shows an improved REE dissolution coupled with high iron dissolution.

另一方面,高溫硫酸化表明,鐵的溶解度可以降低,從而減少雜質去除步驟中鐵沉澱所需的碳酸鎂。使用浮選中試設備產生的濃縮物在高溫硫酸化下進行的初步確認性溼法冶金測試顯示,稀土溶出度得到改善,鐵溶出度高。

A trade-off study is being conducted by SGS Bateman to identify the optimum route for the upstream hydrometallurgical process.

SGS Bateman正在進行一項權衡研究,以確定上游溼法冶金工藝的最佳路線。

The ongoing test-work program and trade-off study aims to establish the process conditions applied in the scale up program of the acid sulphation and water leach unit operations. This work will be followed by further optimisation of the downstream REE recovery steps to produce a mixed rare earth oxide product.

正在進行的測試工作計劃和權衡研究旨在確定酸性硫酸化和水浸裝置運營規模擴大計劃中適用的工藝條件。這項工作之後,將進一步優化下游稀土回收步驟,以生產混合稀土氧化物產品。

About Namibia Critical Metals Inc.

納米比亞關鍵金屬公司簡介

NCMI is developing the Tier-1 Heavy Rare Earth Project, Lofdal, a globally significant deposit of the heavy rare earth metals dysprosium and terbium. Demand for these critical metals used in permanent magnets for electric vehicles, wind turbines and other electronics is driven by innovations linked to energy and technology transformations. The geopolitical risks associated with sourcing many of these metals has become a repeated concern for manufacturers and end users. Namibia is a proven and stable mining jurisdiction.

NCMI 正在開發名爲 Lofdal 的一級重稀土項目,這是一個具有全球重要意義的重稀土金屬 dyprosium 和 ter 礦牀。與能源和技術轉型相關的創新推動了對這些用於電動汽車、風力渦輪機和其他電子設備的永磁體的關鍵金屬的需求。與採購其中許多金屬相關的地緣政治風險已成爲製造商和最終用戶反覆關注的問題。納米比亞是一個久經考驗且穩定的採礦管轄區。

The Lofdal Project is fully permitted with a 25-year Mining License and is under a Joint Venture Agreement with Japan Organization for Metals and Energy Security (JOGMEC).

Lofdal項目獲得全面許可,持有爲期25年的採礦許可證,並與日本金屬與能源安全組織(JOGMEC)簽訂了合資協議。

The Company filed a robust updated PEA for "Lofdal 2B-4" on November 14, 2022, with a post-tax NPV of USD$391 million and an annual IRR of 28% with a capital expenditure of USD$207 million. The project is projected to generate a life of mine nominal cash flow of USD$698 million post-tax over a 16-year mine life.

該公司於2022年11月14日提交了 “Lofdal 2B-4” 的穩健更新後盈利率,稅後淨現值爲3.91億美元,年度內部收益率爲28%,資本支出爲2.07億美元。該項目預計將在16年的礦山壽命中產生6.98億美元的稅後礦山名義現金流。

About Japan Organization for Metals and Energy Security (JOGMEC) and the JV

關於日本金屬與能源安全組織(JOGMEC)和合資企業

JOGMEC is a Japanese government independent administrative agency which seeks to secure stable resource supplies for Japan. JOGMEC has a strong reputation as a long term, strategic partner in mineral projects globally. JOGMEC facilitates opportunities with Japanese private companies to secure supplies of natural resources for the benefit of the country's economic development.

JOGMEC是日本政府的獨立行政機構,旨在確保日本穩定的資源供應。JOGMEC作爲全球礦業項目的長期戰略合作伙伴享有很高的聲譽。JOGMEC爲日本私營公司提供機會,確保自然資源的供應,以促進該國的經濟發展。

Rare earth elements are of critical importance to Japanese industrial interests and JOGMEC has extensive experience with all aspects of the sector. JOGMEC provided Lynas with USD$250,000,000 in loans and equity in 2011 to ensure supplies of the Light Rare Earths metals suite to the Japanese industry.

稀土元素對日本的工業利益至關重要,JOGMEC在該領域的各個方面都擁有豐富的經驗。JOGMEC在2011年向Lynas提供了2.5億美元的貸款和股權,以確保向日本工業供應輕稀土金屬套件。

Namibia Critical Metals owns a 95% interest in the Lofdal project with the remaining 5% held for the benefit of historically disadvantaged Namibians. The terms of the JOGMEC joint venture agreement with the Company stipulate that JOGMEC provides C$3,000,000 in Term 1 and C$7,000,000 in Term 2 to earn a 40% interest in the Lofdal project. Term 3 calls for a further C$10,000,000 of expenditures to earn an additional 10% interest. JOGMEC can also purchase another 1% for C$5,000,000 and has first right of refusal to fully fund the project through to commercial production and to purchase all production at market prices. The collective interests of NCMI and historically disadvantaged Namibians cannot be diluted below a 26% carried working interest upon payment of C$5,000,000 to JOGMEC for the dilution protection. NMI may elect to participate up to a maximum of 44% by funding pro rata after the earn in period is completed.

納米比亞關鍵金屬公司擁有洛夫達爾項目95%的權益,其餘5%用於歷史上處於不利地位的納米比亞人。JOGMEC與該公司簽訂的合資協議條款規定,日本石油天然氣金屬集團在第一期提供300萬加元,在第二期提供700萬加元,以賺取Lofdal項目40%的權益。第三學期要求再支出 1,000,000 加元,以額外賺取 10% 的利息。JOGMEC還可以以500萬加元的價格再購買1%的股份,並有權拒絕爲該項目提供全額資金直至商業化生產,並有權以市場價格購買所有產品。向JOGMEC支付500萬加元的稀釋保護後,NCMI和歷史上處於不利地位的納米比亞人的集體利益不能稀釋到26%的附帶營運利息以下。在收益期結束後,NMI可以選擇通過按比例出資,最多參與44%。

To date, JOGMEC has completed Term 2 and earned a 40% interest by reaching the C$10 million expenditure requirement. Total approved project funding to date is C$14,541,000 of the $20,000,000 Earn-In requirement to reach 50% interest.

迄今爲止,JOGMEC已經完成了第二學期,並通過達到1,000萬加元的支出要求獲得了40%的利息。迄今爲止批准的項目資金總額爲14,541,000加元,而要達到50%的利息,則需要2,000,000加元。

James Brown, Peng. of SGS is a Qualified Person and has reviewed and approved the sections on hydrometallurgical test work in this press release.

SGS的彭傑姆斯·布朗是合格人士,已審查並批准了本新聞稿中有關溼法冶金測試工作的章節。

Rainer Ellmies, PhD, MScGeol, EurGeol, AusIMM and Vice President of Namibia Critical Metals Inc., is the Company's Qualified Person and has reviewed and approved this press release.

Rainer Ellmies博士、MscGeol、EurGeol、AusimM兼納米比亞關鍵金屬公司副總裁,是該公司的合格人士,他已審查並批准了本新聞稿。

The common shares of Namibia Critical Metals Inc. trade on the TSX Venture Exchange under the symbol "NMI" and the OTCQB Market under the symbol "NMREF".

納米比亞關鍵金屬公司的普通股在多倫多證券交易所風險交易所交易代碼爲 “NMI”,OTCQB Market的股票代碼爲 “NMREF”。

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

多倫多證券交易所風險投資交易所及其監管服務提供商(該術語在多倫多證券交易所風險投資交易所的政策中定義)均不對本新聞稿的充分性或準確性承擔責任。

For more information please contact -

欲了解更多信息,請聯繫-

Namibia Critical Metals Inc.

納米比亞關鍵金屬公司

Darrin Campbell, President
Tel: +01 (902) 835-8760
Email: Info@NamibiaCMI.com Web site:

達林·坎貝爾,總統
電話:+01 (902) 835-8760
電子郵件:Info@NamibiaCMI.com 網站:

This news release contains certain "forward-looking information" within the meaning of applicable securities laws. Forward looking information is frequently characterized by words such as "plan", "expect", "project", "intend", "believe", "anticipate", "estimate", "may", "will", "would", "potential", "proposed" and other similar words, or statements that certain events or conditions "may" or "will" occur. These statements are only predictions. Forward-looking information is based on the opinions and estimates of management at the date the information is provided, and is subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected in the forward-looking information. For a description of the risks and uncertainties facing the Company and its business and affairs, readers should refer to the Company's Management's Discussion and Analysis. The Company undertakes no obligation to update forward-looking information if circumstances or management's estimates or opinions should change, unless required by law. The reader is cautioned not to place undue reliance on forward-looking information.

本新聞稿包含適用證券法所指的某些 “前瞻性信息”。前瞻性信息通常以 “計劃”、“預期”、“項目”、“打算”、“相信”、“預期”、“估計”、“可能”、“將”、“會”、“潛在”、“提議” 和其他類似詞語爲特徵,或者關於某些事件或條件 “可能” 或 “將” 發生的陳述。這些陳述只是預測。前瞻性信息基於提供信息之日管理層的意見和估計,受各種風險和不確定性以及其他因素的影響,這些因素可能導致實際事件或結果與前瞻性信息中預測的事件或結果存在重大差異。有關公司及其業務和事務所面臨的風險和不確定性的描述,讀者應參閱公司管理層的討論與分析。除非法律要求,否則如果情況或管理層的估計或意見發生變化,公司沒有義務更新前瞻性信息。提醒讀者不要過分依賴前瞻性信息。

SOURCE: Namibia Critical Metals Inc.

來源:納米比亞關鍵金屬公司


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