Raw Materials Optimization and Industrialization of Sodium Humate by Dry Process of Yunnan Lignite
Dry extraction of Na-HA was conducted using lignite from Shanxing Village coal mine in Xinshao Town,Mile City,Honghe Hani Yi Autonomous Prefecture,Yunnan Province.The a2 seam lignite with the total humic acid content of 52.34%and the pH value of 4.91 was used as the raw material to produce Na-HA.The quality of the Na-HA product obtained was the best when the 24%of NaOH dosage was used,and the Na-HA product was consisted of the total humic acid content of 39.66%with the soluble humic acid content of 30.77%,the pH value of 10.86,and the water insoluble content of 23.24%.The location for product industrialization was in the Shanxing Village mining area of Mile City.The dry process had the advantages that no waste gas,liquid waste and solid waste was produced,thus there was no new environmental pressure.The equipment selection,workshop layout scale,and designed process operations could achieve the annual production capacity of 20000 t,with the total investment of 525000 yuan.
industrializationsodium humateYunnan lignitedry process
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