Spherical calcium oxide adsorbent and preparation method thereof

Abstract

The invention discloses a spherical calcium oxide adsorbent and a preparation method thereof. High-content calcium oxide mineral and clay mineral are used as main raw materials, and the materials are mixed according to the following mixture ratio (in percentage by weight): 50 to 95 percent of the high-content calcium oxide mineral, and 10 to 50 percent of the clay mineral. The preparation method comprises the following steps: mixing the two minerals, molding the mixture in a spherical granulator by using 0 to 1 percent CMC water solution as assistant, screening out spherical granules with certain granularity range by using a two-layer sieve, and further drying, roasting and packing the spherical granules to obtain the spherical calcium oxide adsorbent. The spherical calcium oxide adsorbent comprises the following chemical components: 40 to 90 percent of calcium oxide, 0 to 50 percent of magnesium oxide, 5 to 30 percent of silicon dioxide, 5 to 30 percent of aluminum oxide, and 0 to 30 percent of sodium oxide. The adsorbent has good selective adsorption property and abrasion-resistant property, can be used as a drying agent in the hollow glass industry, can adsorb acid gases such as hydrogen sulfide, hydrogen chloride, sulfur dioxide, chlorine and the like, and can purify industrial waste gases.

Description

Technical field [0001] The patent of the present invention relates to a spherical calcium oxide adsorbent, which can be used as a desiccant and absorbent, used in the field of hollow glass manufacturing and industrial gas purification, and can absorb moisture in air and other gases to dry the gas and adsorb industrial gases Carbon dioxide, sulfur dioxide, hydrochloric acid, ammonia, hydrogen sulfide, etc. in the gas are purified. Background technique [0002] At present, calcium oxide is mostly used as a food desiccant, mainly by calcining, crushing, and screening natural minerals such as calcium carbonate to obtain irregularly shaped particles, which are packed into small bags with air-permeable paper and placed in food bags to absorb air. The moisture in the packaging bag ensures the drying of the food in the packaging bag; due to the irregular shape and low strength of this desiccant, it is easy to be damaged during use, and it is easy to heat up, break and pulverize afte...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing calcium oxide desiccant with low strength and easy breakage, the present invention provides a spherical calcium oxide desiccant with high strength, good wear resistance, not easy to break after absorbing water, and low adsorption capacity for air. Low manufacturing cost, can replace 3A molecular sieve, used in insulating glass

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