[Soda Ash Knowledge] Daily Question (28) 10/31/2009
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Please hide replies; otherwise, no scoring will be given in principle. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Posts that have been edited are not rated. (The topic for this issue is taken from page 67 of “Question Bank for Technical Workers’ On-the-Job Training – Operators in Soda Ash Production”. The electronic version of this book can be downloaded from the Soda Ash Information Sharing Section: http://bbs.hcbbs.com/thread-13140-1-2.html) Fill-in-the-blank questions: 1. The amount of ammonium chloride precipitated in the salting-out crystallizer depends on ( ) and the quantity of ( ) added. 2. The process of crystal precipitation from a solution can be divided into three stages: ( ), ( ), and ( ). 3. If the cooling rate is too fast, the supersaturation level can easily exceed ( ), resulting in the precipitation of a large amount of ( ). 4. The common process flow for combined alkali production in our country is ( ), ( ), ( ), ( ).
1. Temperature, sodium chloride 2. Formation of supersaturation, formation of nuclei, growth of nuclei 3. Metastable zone, nuclei 4. Single carbonation, two ammonia absorption steps, single salt addition, ice mechanism cooling
1. The amount of ammonium chloride precipitated in the salting-out crystallizer depends on (temperature) and the quantity of (sodium chloride) added. 2. The process of crystal precipitation in a solution can be divided into three stages: (formation of supersaturation), (formation of nuclei), and (growth of nuclei). 3. If the cooling rate is too fast, the supersaturation level can easily exceed the metastable region, leading to the formation of a large number of nuclei. 4. The conventional process for combined alkali production in our country involves (single carbonation), (two-stage ammonia absorption), (single salt addition), and (ice machine cooling).
1. The amount of ammonium chloride precipitated in the salting-out crystallizer depends on (temperature) and the amount of (sodium chloride) added. 2. The process of crystal precipitation in a solution can be divided into three stages: (formation of supersaturation), (formation of nuclei), and (growth of nuclei). 3. If the cooling rate is too fast, the supersaturation level can easily exceed the (metastable zone), resulting in the precipitation of a large number of (crystal nuclei). 4. The conventional process for combined alkali production in our country involves (primary carbonation), (secondary ammonia absorption), (primary salt addition), and (ice machine cooling). 1# chen3jun
1 Temperature, Sodium Chloride 2 Formation of supersaturation, formation of nuclei, growth of nuclei 3 Metastable zone, nuclei 4 Primary carbonation, two stages of ammonia absorption, one stage of salt addition, ice mechanism cooling
1. Temperature, sodium chloride 2. Formation of supersaturation, formation of nuclei, growth of nuclei 3. Metastable zone, nuclei 4. Primary carbonation, secondary ammonia absorption, primary salt addition, ice mechanism cooling
1. Temperature, sodium chloride 2. Formation of supersaturation, formation of nuclei, growth of nuclei 3. Metastable zone, nuclei 4. Primary carbonation, secondary ammonia absorption, primary salt addition, cryogenic refrigeration
1. Temperature, sodium chloride 2. Formation of supersaturation, formation of nuclei, growth of nuclei 3. Metastable zone, nuclei 4. Primary carbonation, two stages of ammonia absorption, one stage of salt addition, ice mechanism cooling
1. Concentration of ammonium ions; Salt. 2. Nucleation; Growth. 3. Growth of fine crystals. 4. Add salt once, absorb ammonia twice, carry out carbonization once
1 Temperature, sodium chloride 2 Formation of supersaturation, formation of nuclei, growth of nuclei 3 Metastable zone, nuclei 4 Primary carbonation, two stages of oxygen absorption and one stage of salt addition, ice mechanism cooling