【摘要】 MIXUT-1型水玻璃砂溃散剂系一种以改性矿物油为主体的有机、无机复合型溃散剂。本文研究了该溃散剂对水玻璃砂各种性能的影响,并与英国Dexil-60型溃散剂迸行对比。试验表明:该溃散剂全面压低了水玻璃砂在1000℃以内的残留强度,尤其压低和削平了200℃和800℃左右的残留强度,浇注后出砂指数低,具有良好的溃散性能。同时该溃散剂使水玻璃砂具有较好的工艺性能和硬化强度(包括保存性、CO2即时强度、CO2-烘干强度和硬化后存放强度等)。该溃散剂胶状液在上海大隆铸锻分厂、大连机车厂等工厂各种类型铸钢件上生产试用中,取得了显著效果,获得了较好的技术经济效益。更多还原

【Abstract】 MIXUT-1 breakdown agent for sodium silicate bonded sand is a mixturebased on organic and inorganic materials, consists mainly of a modified mineral oil.Inthis paper the influence of such breakdown agent on the properties of sodium silicatebonded sand is compared with the foreign proprietary product Dexil-60. The resultsshow that MIXUT-1 significantly lower the retained strength of silicate bonded sandwithin 1000℃,especially at and around 200℃ and 800℃, and thus, it has an outstan-ding shakeout property.The use of this agent also provides to the silicate bonded sandthe good performane of technological properties and curing characteristics, such asbench life,CO2-as gassed strength, baked strength after gassed, core storage strength,etc. The gas evolution amount of the modified silicate bonded sand with such agent isa little higher than that of the unmodified one.The chemical analysis of the surfacelayers of steel casting pecimens indicates that the carbon content on the surface of thesteel casting which was made in MIXUT-1 modified silicate bonded sand is compara-tively stable and the sulfur content is lower than those made in clay bonded sand or fu-ran no-bake sand.In this paper the utilization of such breakdown agent to steel castings in severalfoundries are illustrated. It is shown that the economical and environmental benefitswere obtained.更多还原