Method for resource treatment of waste miscellaneous salts produced during desulfurization of coking waste gas
The invention discloses a method for resource treatment of waste miscellaneous salts produced during desulfurization of coking waste gas. The method comprises the following steps: efficiently precipitating thiocyanate radicals in the waste miscellaneous salts by using copper sulfate, and carrying ou...
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| creator | CHEN LEI ZHANG JUNFENG HUANG MING CHEN YOUZHENG ZENG LI HE FENG |
| description | The invention discloses a method for resource treatment of waste miscellaneous salts produced during desulfurization of coking waste gas. The method comprises the following steps: efficiently precipitating thiocyanate radicals in the waste miscellaneous salts by using copper sulfate, and carrying out solid-liquid separation to obtain a salt solution and a precipitate; performing heat treatment onthe precipitate to obtain copper oxide, and regenerating the copper oxide and waste acid of an iron and steel plant into copper sulfate for recycling; oxidizing thiosulfate radicals in the salt solution via micro-nano bubbles to obtain a sulfate solution; and then under the condition of grinding or magnetic stirring, replacing sulfate with calcium sulfate, and directly returning regenerated ammonia and sodium alkali to a desulfurization system for coking waste gas. According to the method, the difficulty of separation and purification of low-value miscellaneous salts is avoided, short-process,strong-stability and high |
| format | Patent |
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The method comprises the following steps: efficiently precipitating thiocyanate radicals in the waste miscellaneous salts by using copper sulfate, and carrying out solid-liquid separation to obtain a salt solution and a precipitate; performing heat treatment onthe precipitate to obtain copper oxide, and regenerating the copper oxide and waste acid of an iron and steel plant into copper sulfate for recycling; oxidizing thiosulfate radicals in the salt solution via micro-nano bubbles to obtain a sulfate solution; and then under the condition of grinding or magnetic stirring, replacing sulfate with calcium sulfate, and directly returning regenerated ammonia and sodium alkali to a desulfurization system for coking waste gas. 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The method comprises the following steps: efficiently precipitating thiocyanate radicals in the waste miscellaneous salts by using copper sulfate, and carrying out solid-liquid separation to obtain a salt solution and a precipitate; performing heat treatment onthe precipitate to obtain copper oxide, and regenerating the copper oxide and waste acid of an iron and steel plant into copper sulfate for recycling; oxidizing thiosulfate radicals in the salt solution via micro-nano bubbles to obtain a sulfate solution; and then under the condition of grinding or magnetic stirring, replacing sulfate with calcium sulfate, and directly returning regenerated ammonia and sodium alkali to a desulfurization system for coking waste gas. 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The method comprises the following steps: efficiently precipitating thiocyanate radicals in the waste miscellaneous salts by using copper sulfate, and carrying out solid-liquid separation to obtain a salt solution and a precipitate; performing heat treatment onthe precipitate to obtain copper oxide, and regenerating the copper oxide and waste acid of an iron and steel plant into copper sulfate for recycling; oxidizing thiosulfate radicals in the salt solution via micro-nano bubbles to obtain a sulfate solution; and then under the condition of grinding or magnetic stirring, replacing sulfate with calcium sulfate, and directly returning regenerated ammonia and sodium alkali to a desulfurization system for coking waste gas. According to the method, the difficulty of separation and purification of low-value miscellaneous salts is avoided, short-process,strong-stability and high</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AMMONIA CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COMPOUNDS THEREOF CYANOGEN INORGANIC CHEMISTRY METALLURGY |
| title | Method for resource treatment of waste miscellaneous salts produced during desulfurization of coking waste gas |
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