转炉

Converter rimming steel over - oxidation is analyzed and solution raised.

本文就转炉沸腾钢过氧化问题进行了原因分析，制订了解决措施。

So it ensures the slags evenness after the

目前使用的两个复吹转炉炉龄均达到16000炉次。

Requirement on steel cleanliness is more and more strict with the development of steel grades smelted in converter changing from traditional plain carbon steel to high extra value grade.

随着转炉冶炼的钢种由传统的普碳钢向高附加值钢种方向的发展，对钢的纯净度提出了越来越高的要求。

In these several years, the company has cooperated with German Lurgi and Nanjing Chermical Industrial Group Design Institute to develop the series of products of waste heat boiler of sulfuric acid made of pyrites. This product and blowing air waste heat boiler are selected as Specially-designated Products. Regarding the cement kiln low temperature waste heat recovery, the company has fully introduced and digested advanced domestic and foreign technologies and has achieved great success. The company has marched into metallurgical industry in 2004, established cooperation with numerous large scale metallurgical institutes and successful developed series of products of waste heat boilers in metallurgical industry, especially sinter cooler low temperature waste gas residual heat power generation boiler. It has successively developed the products such as converter waste heat boiler, electric furnace waste boiler etc.

近几年，公司与德国鲁奇、南化设计院合作研制开发了硫铁矿制酸余热锅炉系列产品，该产品与吹风气余热锅炉被《化工工程建设标准》选为定点产品；在建材行业水泥窑低温余热回收上，充分引进消化国内外先进技术，并取得骄人成绩，2004年进军冶金行业，与国内众多大型冶金院建立了合作，成功开发了冶金行业余热锅炉系列产品，特别是烧结冷却机低温废气余热发电锅炉，又相继开发了转炉余热锅炉、电炉余热锅炉等产品。

Compared with conventional quenched and tempered process, Direct quenching eliminated off-line reheating and quenching, reduced processing costs and shortened process, in addition, DQ process increase hardenability ,weldability, and mechanical balance by reducing alloy elements.

本文以工业生产的转炉连铸22SiMn2TiB钢为研究对象，以实验室热轧实验为主要研究手段，对直接淬火工艺在不同轧制条件下对钢板微观组织与力学性能的影响进行了研究，同时与再加热淬火工艺进行了比较，探讨了此类钢在低温回火下提高强韧性的可能性和直接淬火工艺的机理。

And the other is arc Process using pre-reduction pellets or high-quality industrial scrap as raw materials.

当前，主要有二种炼钢工艺，较为普遍的是以高炉铁水和废钢为原料的转炉炼钢工艺，其次是以预还原球团矿或高质量的工业废钢为原料的电弧工艺。

Ltd and puts forward the method and suggestion to reduce the shell temperature by increasing the thickness of the insulation layer of the asbestos board s.

对重钢50t转炉进行了炉壳温度场及热应力分析，提出了通过加隔热层石棉板降低炉壳表面温度的方法，当石棉板的厚度为30mm左右时，就可以改善炉壳的温度场及应力分布状况，降低炉壳的蠕变变形。

The temperature field and thermal stress of shells with different thicknesses of asbestos board at different temperatures were obtained for an 80 t converter at Chongsteel in China by heat transfer mathematical modeling.

模拟计算了某钢厂80t转炉炉壳温度场以及不同温度条件下炉壳热应力与石棉板厚度之间的关系，计算温度值与现场实测值基本吻合。

Optimum position of a bottom tuyere and amount of gas blowing in a combined blowing converter were determined by measurement on perfect mixing time of metal bath via water model experiments.

采用水力学模型试验，通过测定熔池均匀混合时间长短，确定复吹转炉底部供气元件最佳位置和供气量。结果是单支底部供气元件偏心布置在炉底耳轴方向0.4D位置，供气量在0.557～0.928m3／h的复吹熔池均匀混合时间最

Optimum position of a bottom tuyere and amount of gas blowing in a combined blowing converter were determined by measurement on perfect mixing time of metal bath via water model experiments.

采用水力学模型试验，通过测定熔池均匀混合时间长短，确定复吹转炉底部供气元件最佳位置和供气量。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。