The invention relates to a billet vertical drawing continuous casting machine and a pressing process device, which comprises a full four-sided holding foot roll section, a secondary cooling zone four-sided holding roll row and a pressing process device. The full four-sided clamping foot roll section is constrained in the width and thickness direction of the slab; the four-sided clamping rollers in the secondary cooling zone are at least three groups of four-sided clamping rollers, the rest of which are lower idlers; the screwdown process device is located in the solidification end area of the slab, and is in the form of a single frame, each group of frame is composed of upper and lower pressing rollers, and the roll gap formed between the upper and lower pressing rollers as well as between the upper and lower pressing rollers. The number of screwdown devices used corresponds to the size of billet, steel grade and actual drawing speed on site. The technical scheme of the invention can effectively improve the central density of the billet, make the central shrinkage and segregation of the billet effectively controlled. To ensure that the slab can effectively control the bulge of the slab and ensure the shape of the slab under the vertical drawing mode, paving the way for the subsequent slab to enter the rolling process with square after the pressing process.
【技术实现步骤摘要】
一种小方坯立式拉坯连铸机及压下工艺装置
本专利技术涉及一种小方坯连铸机,属于连铸生产领域,具体涉及一种小方坯立式拉坯连铸机及压下工艺装置。
技术介绍
传统小方坯连铸机均采用宽面为宽度方向,窄面为厚度放下上、下两夹辊的方式,对宽度方向进行约束,配合二冷系统对铸坯表面进行喷淋,保证坯壳不出现大的鼓肚量。为了满足品种钢的质量要求,减少铸坯内部偏析和疏松,也多采用结晶器电磁搅拌或结晶器、凝固末端双电搅的组合方式,而电搅技术的配置只适合低拉速生产,当拉速升高后,液芯加长,内部质量会迅速恶化,导致铸坯质量达不到预期要求。而且当铸坯送轧时需准确调整铸坯厚度和宽度方向,以保证铸坯能够顺利通过轧机入口,但当翻钢机出现故障时,会导致铸坯无法通过轧机入口,影响后续翻钢,进而影响生产效益。因此,提出一种小方坯立式拉坯连铸机及压下工艺装置对生产高品质铸坯和保障生产至关重要。专利申请CN102000789A“一种连铸机及小方坯轻压下装置”、专利申请CN106345977A“高速小方坯或小圆坯连铸机二次冷却方法及装置”和专利申请CN206527325U“小方坯连铸机”上述研究都提出的是宽面为宽度方向的拉坯方式,虽然也采用压下装置但是钢种覆盖面低,无法实现多钢种多断面的实际现场生产要求,并且压下能力有限,无法实现高效压下。
技术实现思路
为了克服上述现有技术的不足,本专利技术提供的目的在于提供一种小方坯立式拉坯连铸机及压下工艺装置,在保证铸坯内部质量的情况下,能够实现立式拉坯并且能够实现压下功能。为了实现上述目的,本专利技术的技术方案如下:一种小方坯立式拉坯连铸机及压下工艺装置,所述的小方坯 ...
【技术保护点】
1.一种小方坯立式拉坯连铸机及压下工艺装置,其特征在于,足辊段区域夹辊均采用四面夹持铸辊,即在铸坯的宽度和厚度方向均进行约束。
【技术特征摘要】
1.一种小方坯立式拉坯连铸机及压下工艺装置,其特征在于,足辊段区域夹辊均采用四面夹持铸辊,即在铸坯的宽度和厚度方向均进行约束。2.根据权利要求1所述的小方坯立式拉坯连铸机及压下工艺装置,其特征在于,二冷区采用分段四面夹持铸辊,即在二冷区分段布置至少三组四面夹持辊列,其余均为下托辊。3.根据权利要求1所述的小方坯立式拉坯连铸机及压下工艺装置,其特征在于,四面夹持辊辊径范围为85-110mm,下托辊辊径范围为190-210mm。4.根据权利要求1所述的小方坯立式拉坯连铸机及压下工艺装置,其特征在于,压下工艺装置设置在铸坯凝固末端区域,具体在固相率fs=0.4-0.9之间。...
【专利技术属性】
技术研发人员:祭程,朱苗勇,李应焕,吴晨辉,
申请(专利权)人:东北大学,
类型:发明
国别省市:辽宁,21
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