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王德民、刘学成、汤天威、赵明昕、刘畅(锦州市职业病防治研究所)张树桓、赵蕊(锦州铁合金厂)报道:锦州铁合金厂使用国内海南锆英砂冶炼工业用锆,年用量850吨,日操作量约2.8吨。矿砂总α放射性比活度为1.7×10~5Bq·kg~(-1),主要天然放射性核素铀含量为900mg·kg~(-1)、钍含量为3900mg·kg~(-1)、镭为9.32×10~3Bq·kg~(-1),在生产过程中随着锆的提出,放射性物质逐步转入废液和废渣中。 经测定,γ表面照射量率大部分都在5×10~(-8)C.
Zhang Shuhuan, Zhao Rui (Jinzhou Ferroalloy Plant) reported: Jinzhou ferroalloy plant using domestic zircon sand zirconium industry smelting industry zirconium, the annual amount of 850 tons, the amount of daily operations About 2.8 tons. The specific activity of total α radioactive ore was 1.7 × 10 ~ 5Bq · kg -1, the main natural radionuclide was 900 mg · kg -1, the content of thorium was 3900 mg · kg -1, Radium is 9.32 × 10 ~ 3Bq · kg ~ (-1). With the proposal of zirconium in the production process, the radioactive substances are gradually transferred into waste liquid and waste residue. It has been determined that most of the γ surface irradiation rate is 5 × 10 -8 C.