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三十年来,我国锰矿生产技术较之解放前有了较大的发展。解放前,锰矿石平均年产量不足两万吨,现在锰产品年产量已达250万吨,基本上保证了冶金、化工、轻工、国防等部门的需要。锰矿生产过去仅单一开采原矿,现在已建成五个采、选、烧、冶联合企业,形成了一定的生产能力。全国有关的研究院所和锰矿山,为了提高锰产品质量,增加产品品种,改变产品结构,多年来做了不少的试验研究工作,特别是近几年,锰矿生产技
In the past 30 years, the manganese ore production technology in our country has been greatly developed compared with that before liberation. Before liberation, the average annual output of manganese ore was less than 20,000 tons. Now the annual output of manganese products has reached 2.5 million tons, basically guaranteeing the needs of metallurgy, chemical industry, light industry and national defense. Manganese ore production in the past only a single mine, has now completed the construction of five mining, election, burning, metallurgical joint venture, formed a certain production capacity. Relevant national research institutes and manganese mines have done a lot of experimental research over the years in order to improve the quality of manganese products, increase product varieties and change product structure. In particular, in recent years, manganese ore production technology