Chlorine-free drying agent for powdery mineral

Abstract

The invention discloses a chlorine-free drying agent for powdery mineral. The technical scheme of the invention has key point that the chlorine-free drying agent for the powdery mineral consists of red bentonite, dolomite and attapulgite clay, bauxite, sulfuric acid and sodium aluminate. The production method of the chlorine-free drying agent for the powdery mineral comprises the following steps of: mixing the red bentonite, the dolomite and attapulgite clay, bauxite and the bauxite for acidating, tabletting and thermally treating, then commonly crushing the mixture with the sodium aluminate and packaging into the chlorine-free drying agent for the powdery mineral. The chlorine-free drying agent for the powdery mineral has the advantages of high static water adsorptive capacity, chlorine freedom, no toxicity or odor, no contacted corrosion or pollution to the environment, low production cost, wide application range and favorability for popularization and application; and the chlorine-free drying agent for the powdery mineral is prepared by adopting a simple production process, is suitably placed in various small-sized packaging bags and is suitable for preventing instruments and meters, electrical appliances, electronic products, medicines, foods, textiles, leather, shoes, clothes and other various packaged articles from being mildewed due to dampness or corroded.

Description

technical field [0001] The invention relates to a desiccant, in particular to a powdered mineral chlorine-free desiccant. Background technique [0002] Mineral desiccants mainly include montmorillonite desiccant and attapulgite desiccant. The appearance of montmorillonite desiccant is broken, easy to pulverize, and expand after absorbing moisture. The moisture absorption rate of attapulgite desiccant can be adjusted, and the appearance is spherical, but It contains chloride ions, which have contact corrosion to metal products. Although the existing chlorine-free desiccants on the market do not add chlorine ion-containing substances, their static water adsorption is less than 20%, which is lower than the relevant desiccant standards. [0003] Chinese Patent Authorization Announcement No. CN 100562498C, date of authorized announcement November 25, 2009, titled "Method for Treating Industrial Waste Acid with Dolomite Attapulgite Clay and Preparation of Desiccant", discloses a ...

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Problems solved by technology

[0004] The disadvantages of the above-mentioned patents are: (1) Simply adding attapulgite clay powder containing dolomite to the waste acid solution and calcining to obtain attapulgite clay composite desiccant, the static water adsorption in 24 hours is less than 20%; (2) attapulgite clay In clay mining, dolomite attapulgite clay is a complete mineral, and dolomite and attapulgite clay cannot be separated into individual monomers. Therefore, the above-mentioned patent "in the dolomite-containing attapulgite clay , by weight percentage, containing 10-60% of dolomite and 40-90% of attapulgite clay", which cannot be realized in actual production