（文章来源：证券日报） 证券日报网讯 12月11日，大中矿业在互动平台回答投资者提问时表示，公司湖南锂矿项目采用全流程 自营的采选冶一体化运营模式，从采矿、选矿到冶炼加工，核心生产环节均由公司专业团队自主运营管 理。现规划在选矿及冶炼生产环节，将有价有素进行收集，并根据市场需求，进一步加工成副产品销 售，实现额外收益。特别在冶炼环节，项目采用公司自主研发的硫酸法提锂新工艺，在提高锂回收率的 同时，实现对副产物的有价回收，构建"一矿多产、综合利用"的生产模式，从而降低整体生产成本。 ...

Group 1: Lithium Mining Projects - The Sichuan lithium project has a cost advantage due to high-grade spodumene ore and self-operated mining and selection [2] - The Hunan lithium project benefits from an integrated mining and smelting process, allowing for adjustments in concentrate grade and recovery rate based on market prices [2] - The Hunan project has a planned capacity of 2 million tons/year, producing 80,000 tons of lithium carbonate annually, with phased construction [3] Group 2: Capital Expenditure and Financing - The company plans to focus on exploration, mining, and selection for the Sichuan project without immediate plans for a smelting plant due to sufficient local smelting capacity [3] - The Hunan project investment scale has been disclosed in previous announcements, and the company currently has stable operating cash flow to support project construction [3] - There are no immediate plans for capital market financing; future needs will be assessed based on market conditions [3] Group 3: Iron Ore Production and Market Impact - The expected production of the Ximangdu iron mine may lead to downward price pressure in the market [4] - The company maintains strong cost control, with an average sales cost of iron concentrate at 374.11 RMB/ton and a gross margin of 54.79% [4] - Strategies to maintain profitability include a clear expansion plan and leveraging the quality of iron concentrate to enhance pricing power [5] Group 4: Technological Advancements - The company has made significant progress in the new lithium extraction process using sulfuric acid, achieving a lithium recovery rate of 90% and reducing waste by 50% [6] - The new process allows for the simultaneous recovery of valuable elements like potassium, enhancing overall production efficiency [6] - The extraction of by-products such as rubidium and cesium is integrated into the cost structure, although their sales have not yet been factored into cost reductions [6]