US halves 50% aluminium tariff for new smelter investments China-owned copper mine in Pakistan faces militant blockade LME base metals traded mixed on 22 July. Lead recorded the strongest increase, rising 1.50% d-o-d to $1,897/t, followed by zinc, up 1.13% to $3,592/t, aluminium, which gained 1.11% to $3,193/t, and nickel, up 0.87% to $17,234/t. Copper…