製塩副産石膏の処理利用研究
書誌事項
- タイトル別名
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- Studies on Utilization of Byproduct Gypsum from Salt Making Plants
説明
In the present paper were reported the results of various studies on utilization of byproduct gypsum material, which are called as “Gomi” and “Scale” and have the main compositions of NaCl and CaSO4 mixed with MgCI2, KCI, MgSO4, K2SO4, Na2SO4, etc. These gypsum containing byproducts were firstly washed with sea water or dilute brine to dissolve and exclude NaCI and other salts above mentioned. CaSO4 in these byproducts “Gomi” and “Scale” was proved to be of anhydrour form, which is called as soluble anhydrous gypsum, owing to the high boiling temperature in the concentrated brine solution. This soluble anhydous gypsum (CaSO4) changed easily to the crystal gypsum (CaSO4·2H2O), by treating with dilute NaCI solution, which is the dissolving solution to separate out NaCI, KCI, MgCI2, MgSO4, K2SO4, etc. above mentioned.<BR>Crystalgpysum (CaSO4·H2O), thus obtained, was mixed homogeneously with calcined dolomite powder and slaked with proper amount water, and obtained special gypsum dolomite plaster (called by the present authors as “Gypster”), by the following equation. This special gypsum dolomitegypster (Gypster) was proved io be superior plastering material, x (CaSO4·2H2O)+(1-x)(CaO+ MgO)+y H2OxCaSO4·1/2H2O+(1-x)[Ca(OH)2+Mg(OH)2] by various testing methods of various plasters.<BR>This purified crystal gypsum or its cr ude raw material “Gomi” or “Scale” was mixed with raw dolomite in proper proportion and this mixture was calcined at about 900°C and then slaked with water of proper amount to special gypsum dolomite plaster. This poduct was also proved to be useful as plastering material of superior quality.
収録刊行物
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- 日本塩学会誌
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日本塩学会誌 10 (5), 194-198, 1956
日本海水学会
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詳細情報 詳細情報について
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- CRID
- 1390282679572473216
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- NII論文ID
- 130004417186
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- ISSN
- 21870322
- 03695646
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
