前三季度，受安全环保检查频繁等影响，优质主焦煤、肥煤整体供应持续偏紧。同时，蒙古国受疫情等影响，上半年通关量不及预期，导致炼焦煤供应持续受限，1-8 月，我国炼焦精煤供需总缺口为1710 万吨。

2021年4—5月，以铜、铁矿石为代表的大宗金属矿产品价格再度上扬，目前价格已经达到或突破历史峰值。大宗金属矿产品价格的不断上涨推高金属产品价格，直接考验下游消费行业的承受能力。其价格传导的结果一旦受阻必然形成行业链条乃至整体经济的通胀，阻滞中国经济向高质量发展。因此，必须在坚持国内大循环为主、国内国际双循环相互促进的经济发展格局下，对实体经济与金融市场的双向、关键性调节和有效、有力的政府政策纾解，是化解大宗金属矿产品价格上涨带给整体经济通货膨胀压力的关键步骤。

产地生产平稳，需求持续释放，煤价稳中上涨。截至9 月17 日，陕西 榆林动力块煤（Q6000）坑口价1195.0 元/吨，周环比上涨75.0 元/吨； 大同南郊粘煤坑口价(含税)（Q5500）995.0 元/吨，周环比上涨25.0 元/吨；内蒙古东胜大块精煤车板价（Q5500）983.0 元/吨，周环比上 涨68.0 元/吨。本周产地生产稳定，下游电厂库存依旧处于低位，建 材、化工、冶金等非电煤需求持续释放，拉运积极，北方冬储煤出现大 量招标采购，煤价稳中上涨。

Well drilling is a significant and inseparable part of spacer fluid market industry. During the drilling and completion of a well, spacers are extremely crucial. Spacers separate the drilling fluid and cement in the drilling devices. Owing to their chemical incompatibility, the possibilities of acute gelatin or flocculation are enhanced during this process. After the drilling fluid has been run down the drill string, spacer fluids are pumped down the drill string before the cement slurry is poured in. A spacer fluid is used in cementing operations to separate the cement from the drilling fluid. With the growth of the energy and natural resources industries, spacer fluid is expected to become more popular.

The nepheline market is segmented on the basis of product type, application, and region. By product type, the market is classified into nepheline syenite, nepheline monzonite, and nephelinites. Depending on application, it is segregated into ceramic products, glass products, refractories, and others. Region wise, it is analyzed across North America, Europe, Asia-Pacific, and LAMEA. The report covers the strategies adopted by key players in the market to sustain the competitive environment and increase their market share. The key players operating in the global market include AGSCO Corporation, Unimin Corp. (COVIA), Phos Agro Group of Companies, Anglo Pacific Minerals Ltd., Anyang Country Mining Co Ltd., SCR Sibelco, RUSAL PLC, The 3M Company, Finetons Industrial Minerals Ltd., and North Cape Minerals AS. In addition, the market drivers, restraints, and opportunities are explained in the report.

本文概述了海洋资源环境状况，海洋资源环境面临的危机，提出人类社会与海洋共生共荣的理念。