This Day On The Street
Continue to site
This account is pending registration confirmation. Please click on the link within the confirmation email previously sent you to complete registration.
Need a new registration confirmation email? Click here

Duluth Metals Provides Metallurgical Update On Twin Metals Minnesota Project


Three concentrates from the Twin Metals project were successfully processed through Teck's hydrometallurgical research facility utilizing the CESL™ process for approximately a six week period in Q1 of 2013. The concentrates processed through the pilot plant consisted of three different concentrates from the Twin Metals resource. The first concentrate was a bulk concentrate (all metals floated in one concentrate) made from a mixed sample of material from the Maturi and Birch Lake deposits. The second concentrate was a bulk concentrate made from material derived from the western portion of the Maturi deposit. The third concentrate was a nickel concentrate derived as one of two products from the ALS flotation pilot plant during the period when a separate copper and nickel concentrate was being produced from ore from the western portion of the Maturi deposit.

The concentrate characteristics were:
  • Maturi Bulk #1 - produced from Maturi East and Birch Lake deposits (17.0 % Cu, 3.7 % Ni and 20.4 g/t TPM (Total Precious Metals or TPM = Platinum+Palladium+Gold));
  • Maturi Bulk #2 - produced from Maturi West deposit (15.5 % Cu, 4.1% Ni and 9.0 g/t TPM);
  • Maturi Ni-Cu - produced from Maturi West deposit after separation of a high grade Cu concentrate ( 6.9 % Cu, 8.0 % Ni and 10.6 g/t TPM).

The main goals for each of the concentrates were to determine optimal base metal extraction while also recovering precious metals. Multiple variables were tested in the leaching circuits to determine the optimal operating conditions for recovery of metals.

Overall CESL™ pilot plant metal recoveries from concentrate are presented in Table 1. The results for the two bulk samples are combined due to limited run time for the second sample.
        Table 1: Maturi Metal Recoveries from Concentrate
    Concentrate                   Metal Recovery
                                  % Cu       % Ni
    Maturi Bulk #1                93.7       96.1
    Maturi Bulk #2
    Maturi Ni-Cu                  91.2       97.6

Recovery of Precious Metals from CESL™ residue

3 of 5

Check Out Our Best Services for Investors

Action Alerts PLUS

Portfolio Manager Jim Cramer and Director of Research Jack Mohr reveal their investment tactics while giving advanced notice before every trade.

Product Features:
  • $2.5+ million portfolio
  • Large-cap and dividend focus
  • Intraday trade alerts from Cramer
Quant Ratings

Access the tool that DOMINATES the Russell 2000 and the S&P 500.

Product Features:
  • Buy, hold, or sell recommendations for over 4,300 stocks
  • Unlimited research reports on your favorite stocks
  • A custom stock screener
Stocks Under $10

David Peltier uncovers low dollar stocks with serious upside potential that are flying under Wall Street's radar.

Product Features:
  • Model portfolio
  • Stocks trading below $10
  • Intraday trade alerts
14-Days Free
Only $9.95
14-Days Free
Dividend Stock Advisor

David Peltier identifies the best of breed dividend stocks that will pay a reliable AND significant income stream.

Product Features:
  • Diversified model portfolio of dividend stocks
  • Updates with exact steps to take - BUY, HOLD, SELL
Trifecta Stocks

Every recommendation goes through 3 layers of intense scrutiny—quantitative, fundamental and technical analysis—to maximize profit potential and minimize risk.

Product Features:
  • Model Portfolio
  • Intra Day Trade alerts
  • Access to Quant Ratings
Real Money

More than 30 investing pros with skin in the game give you actionable insight and investment ideas.

Product Features:
  • Access to Jim Cramer's daily blog
  • Intraday commentary and news
  • Real-time trading forums
Only $49.95
14-Days Free
14-Days Free


Chart of I:DJI
DOW 16,472.37 +200.36 1.23%
S&P 500 1,951.36 +27.54 1.43%
NASDAQ 4,707.7750 +80.6910 1.74%

Free Reports

Top Rated Stocks Top Rated Funds Top Rated ETFs