$Horsehead Holding(ZINC)$ 8-K - Current report Filed: 2016-01-19 AccNo: 0001193125-16-431712 Size: 22 KBItem 1.01: Entry into a Material Definitive AgreementItem 2.04: Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet ArrangementIte 网页链接