{"id":3052,"date":"2020-09-25T08:14:41","date_gmt":"2020-09-25T08:14:41","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=3052"},"modified":"2020-10-26T05:52:13","modified_gmt":"2020-10-26T05:52:13","slug":"granular-refining-agents","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/ar\/granular-refining-agents\/","title":{"rendered":"\u0639\u0648\u0627\u0645\u0644 \u0627\u0644\u062a\u0643\u0631\u064a\u0631 \u0627\u0644\u062d\u0628\u064a\u0628\u064a\u0629"},"content":{"rendered":"

According to the purification mechanism, the treatment in the furnace can be divided into two categories: adsorption purification and non-adsorption purification. The adsorption purification relies on the adsorption of the \u0639\u0627\u0645\u0644 \u062a\u0643\u0631\u064a\u0631<\/a> to achieve the purpose of removing oxide inclusions and gases. Among them, the flux used in the argon spray powder flux method is a mixture of alkali metal chloride and fluoride salts. The powdered KCl, MgCl2, and CaF2 mixed refining agent used in aluminum-magnesium alloys. And the new granular refining agents were selected to conduct experiments to compare the degassing effect before the furnace.<\/p>\n

\"\u0639\u0648\u0627\u0645\u0644<\/p>\n

The proportion of solid materials in front of the furnace is strictly controlled at\u00a020-25%, the alloying elements are all used as master alloy ingredients, the refining temperature is controlled at 730-740\u2103, and the refining is divided into two times. The amount of refining agent is 1Kg\/ton aluminum each time. The blowing speed is controlled for 20-25 minutes each time. After refining, let stand for 40 minutes for each heat, and then use a forklift to manually slag off the slag. Pick up until the surface of the molten aluminum is clean within 15 minutes. After the casting is opened for 15 minutes, the flow tank at the furnace eye is used for hydrogen measurement after the molten aluminum level is stable. The instrument measures the hydrogen content in accordance with the standard operating procedures. The powdered and granular refining agents are measured for 10 heats each. The hydrogen measured data is the average of 4 consecutive measurements.<\/p>\n

The powdered KCl, MgCl2, CaF2 mixed refining agent and the new granular refining agents were compared in parallel experiments on the degassing effect before the furnace. The hydrogen content of the two refining agents was measured for 10 heats each. According to measurements, hydrogen accounts for more than 85% of the gas present in aluminum alloys. Therefore, \u201cgas content\u201d can be regarded as a synonym for hydrogen content. According to the comparison of hydrogen content data after refining, it can be seen that the granular flux is removed from the furnace before the furnace. The gas effect is slightly better than the powdered refining agent.<\/p>\n

Production practice and scientific evidence have proved that the main factors affecting the hydrogen absorption of aluminum alloy melt are the partial pressure of water vapor in the atmosphere and the melting temperature. The flux can change the state of the oxide film on the surface of the melt and make the layer of solid and dense oxidation on the surface of the melt. The film is broken into fine particles, which facilitates the escape of hydrogen from the particles of the oxide film layer. The ordinary powdered refining agent generally has a melting point of 600-680\u00b0C, while the new granular refining agents can make the melting point of the flux lower than 460\u00b0C through the change of the chloride salt crystal form, which can react with the aluminum melt more quickly, and enhance the flux outgas ability.<\/p>","protected":false},"excerpt":{"rendered":"

According to the purification mechanism, the treatment in the furnace can be divided into two categories: adsorption purification and non-adsorption purification. The adsorption purification relies on the adsorption of the refining agent to achieve the purpose of removing oxide inclusions and gases. Among them, the flux used in the argon spray powder flux method is […]<\/p>\n","protected":false},"author":1,"featured_media":3095,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[8796,8797,8807,8804,8805,8806,8802,8803,8801,8800,8799,8792,8794,8789,8793,8795,8791,8790,8798],"class_list":["post-3052","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-granular-refining-agents-for-dubai-aluminium-dubal-careers","tag-granular-refining-agents-for-dubai-aluminium-co-ltd-dubal","tag-granular-refining-agents-for-dubai-aluminium-company-ltd-dubal","tag-granular-refining-agents-for-dubai-aluminium-company-ltd-uae","tag-granular-refining-agents-for-dubai-aluminium-company-ltd-v-salaam","tag-granular-refining-agents-for-dubai-aluminium-company-ltd-v-salaam-2003-ac366","tag-granular-refining-agents-for-dubai-aluminum-co-ltd-v-salaam","tag-granular-refining-agents-for-dubai-aluminum-co-ltd","tag-granular-refining-agents-for-dubai-aluminum-company-dubal","tag-granular-refining-agents-for-dubai-aluminum-company-limited-dubal","tag-granular-refining-agents-for-dubai-aluminum-company-ltd-dubal","tag-granular-refining-agents-for-dubal-dubai-aluminium-company-limited","tag-granular-refining-agents-for-dubal-dubai-aluminium-co","tag-granular-refining-agents-for-dubal-aluminium-driver-jobs","tag-granular-refining-agents-for-dubal-dubai-aluminium","tag-granular-refining-agents-for-dubal-dubai-aluminium-company","tag-granular-refining-agents-for-dubal-dubai-aluminium-company-ltd","tag-granular-refining-agents-for-dubal-dubai-aluminium-company-uae","tag-granular-refining-agents-for-jobs-in-dubal-dubai-aluminium"],"yoast_head":"\nGranular Refining Agents and Powder Flux Refining Effect<\/title>\n<meta name=\"description\" content=\"Granular refining agents can react with the aluminum melt more quickly, and enhance the flux outgas ability. 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