Spherical calcium oxide adsorbent and preparation method thereof

Abstract

The invention relates to a spherical calcium oxide adsorbent and a preparation method of the spherical calcium oxide adsorbent. The spherical calcium oxide adsorbent takes a high content calcium oxide mineral and a clay mineral as main raw materials. The spherical calcium oxide adsorbent is prepared from materials in percentage by weight: 50-95% of high content calcium oxide mineral, and 5-50% of clay mineral. The preparation method of the spherical calcium oxide adsorbent comprises the steps of: mixing the high content calcium oxide mineral and the clay mineral, taking a CMC (carboxyl methyl cellulose) aqueous solution in the concentration of 0-10% as an assistant, molding in a spherical pellet granulator, screening spherical particles in a certain particle size range by two layers of sieves, further drying, roasting and packaging the spherical particles to obtain the spherical calcium oxide adsorbent. The spherical calcium oxide adsorbent is chemically prepared from 40-95% of calcium oxide, 0.5-49.5% of magnesium oxide, 3-30% of silicon dioxide, 1-30% of aluminum oxide, 0-30% of sodium oxide, and 0.5-5% of ferric oxide. The spherical calcium oxide adsorbent has favorable selective adsorption performance and wear-resistant performance. Moreover, the spherical calcium oxide adsorbent can be used as a desiccant used in the hollow glass industry, and also can adsorb acid gases such as hydrogen sulfide, hydrogen chloride, sulfur dioxide and the like to purify the 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 adsorbent in the fields of hollow glass manufacturing and industrial gas purification. It can absorb moisture in air and other gases to dry the gas, and absorb industrial gases Carbon dioxide, sulfur dioxide, hydrochloric acid, ammonia, hydrogen sulfide, etc. to purify the gas. 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 and limestone to obtain irregularly shaped calcium oxide particles, which are packed into small bags with air-permeable paper and placed in food bags. It is used to absorb moisture in the air to ensure the drying of the food in the packaging bag; due to its irregular shape and low strength, this desiccant is easy to be damaged during use, and it is easy to generate heat, crack and ...

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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 adsorbent, which has high strength, good wear resistance, is not easy to break after absorbing water, and has a low adsorption capacity for air. Low manufacturing cost, can replace 3A molecular sieve, used in insulating glass

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