小型钢铁厂50万吨电炉炼钢、连铸连轧生产线建设草案

小型钢铁厂50万吨电炉炼钢、连铸连轧生产线建设草案

ANNUAL CAPACITY OF 500,000t/a STEELMAKING AND ROLLING PROCESS CONCETP

目录 TABLE OF CONTENTS 1 总论 SUMMARY 1．1项目提出 OBJECTIVE

1．2建设规模CONSTRUCTION SCALE

1．3产品初步方案PRIMARY PRODUCT SCHEDULE 2 炼钢STEELMAKING

2．1工艺及设备选择 PROCESS AND EQUIPMENT 2．2生产方法 PRODUCTION METHOD

2．3炼钢工艺流程 STEELMAKING PROCESS FLOW 2．3．1流程 PROCESS FLOW

2．3．2工艺流程简述 INTRODUCTION TO THE PROCESS FLOW

2．4炼钢主体设备及主要参数 MAIN STEELMAKING EQUIPMENT AND PARAMETER 2．4．1电弧炉 ELECTRIC ARC FURNACE 2．4．2钢包精炼炉 LADLE FURNACE

2．4．3连铸系统 CONTINUOUS CASTING MACHINE

2．5炼钢、精炼及连铸各项主要指标MAIN TECHNICAL AND ECONOMIC INDEXES 2．5．1电炉指标 ELECTRIC ARC FURNACE 2．5．2 LF炉指标 LADLE FURNACE

2．5．3 连铸机指标 CONTINUOUS CASTING MACHINE 2．6主要原材料 MAIN RAW MATERIAL 2．6．1废钢、生铁 SCRAP、PIG IRON 2．6．2其它材料 OTHERS 2．6．3电极 ELECTRODE

3 棒材轧钢生产线 TWISTED STEEL PRODUCTION LINE 3．1工艺及设备选择 PROCESS AND EQUIPMENT 3．2生产方法选择 PRODUCTION METHOD

3．3工艺流程 PROCESS FLOW

3．4工艺流程简述 INTRODUCTION TO THE PROCESS FLOW 3．5棒材轧机主设备及参数MAIN EQUIPMENT AND INDEXES 3．6棒材规格品种 PRODUCT MIX

4 小型型钢轧钢生产线 SECTION STEEL PRODUCTION LINE 4．1工艺及设备选择 PROCESS AND EQUIPMENT CHOSEN 4．2工艺流程 PROCESS FLOW

4．3工艺流程简述 INTRODUCTION TO THE PROCESS FLOW 4．4型材轧机设备及参数 MAIN EQUIPMENT AND INDEXES 4．5型材轧制规格品种 PRODUCT MIX 5 动力能源 THERMAL AND POWER SUPPLY 5．1热力 THERMAL 5．2供电 POWER SUPPLY

6 环境保护 ENVIRONMENTAL PROTECTION

7 设备费用MAIN EQUIPMENT INVESTMENT ESTIMATE 8 其它 OTHERS

1．总论summary 1．1 项目提出objective

炼钢能力55万吨，配公司现有螺纹钢连轧生产线及另外添置一条小型型钢生产线，共计50万吨轧钢能力，形成完整的的共计50万吨连铸连轧的生产线，以供市场需求。

This plan prepares to construct 550,000 tons annual steelmaking capacity, 300,000 tons in twisted steel rolling and 200,000 tons in section steel rolling per year, to form an integrated steel production line, so as to meet the requirement of the market.

1．2 建设规模 construction scale

按公司现有的螺纹钢连轧生产线为基础，并另配一条小型型钢生产线，上游配套相应的炼钢连铸生产线，建成炼钢厂、轧钢厂，形成一条完整的生产链。

There is a twisted steel rolling line now, a section steel rolling line and steel making line need to be added to form a complete product line.

炼钢厂主要装备50吨交流偏心底出钢（50tAC/EBT）电弧炉2座，50吨钢包精炼炉一座，三机三流多功能方圆坯连铸机一台（R8m或R9m）。在目前条件下以全废钢为原料，形成短流程炼钢生产线，年产钢水55万吨、连铸坯53万吨（150～220方坯或Φ150～220圆坯）。 The main equipment in steelmaking plant are composed of two 50tAC/EBT electric furnace, one 50t ladle furnace and one R8m(or R9m) three—motor and three—flow continuous casting machine. The materials are mainly scrap. The production capacities are 550,000 tons per year for steelmaking and 530,000 tons per year for casting bloom. The cast product section size ranges from 120mm×120mm to 220mm×220mm.

轧钢厂分两部分，其一以我公司现有棒材连轧生产线为基本模式，由20架全水平式机组组成棒材连轧生产线，除生产螺纹钢外，考虑生产圆钢管坯钢等产品，年生产能力30万吨；同时另建一条半连轧小型型钢生产线，年生产能力每年20万吨。

The steel mill is made up of two parts, one is Chanrong’s existing continuous steel rolling production line, which consists of 20 full horizontal mill trains, and the production capacity is 300,000 tons per year for twisted steel. Another is the half-continuous steel rolling production line planned to be built for section steel; its production capacity is 200,000 tons per year. 1．3 产品初步方案 product primary mix

棒材产品方案为大、小规格比较齐全的Ⅱ级Ⅲ级螺纹钢，低合金结构钢种圆钢及碳素管坯圆钢。螺纹钢可为Φ32～10系列，圆钢可为Φ50～120系列；型钢产品方案为小型角钢、槽钢、工字钢，规格为10﹟--20﹟。

For twisted steel, the production capacity is 300,000t per year; the product size is Φ10-32mm. The grade is HRB335 and HRB400.

For section steel, the production capacity is 200,000t per year. The products includes angle, channel and I-beam, the production size is from 10＃ to 20＃. 2 炼钢 steelmaking

2．1 工艺及设备选择 process and equipment choice

炼钢厂主要原料为各种工业、民用及军用废钢，根据资源情况可配入生铁，同时寻求铁水或还原铁等其它资源。

The main raw material is scrap steel, mainly industrial, civilian and military supplies. Depending on condition, pig iron, molten iron and DRI etc could be used.

工艺流程为：废钢生铁加入50吨偏心底出钢电炉初炼脱P、脱C去除夹杂气体及有害物质

后进入50吨钢包精炼炉脱气精炼，并除S、调整化学成分和钢液温度。精炼后的钢水用行车吊至连铸机后铸成坯，铸机连浇炉数≥5炉。

Process flow: scrap and carbon-added pig iron are fed into 50t EBT electric furnace to be melted; phosphorus, carbon, gas and impurity in the liquid steel are removed. Then the liquid steel will be tapped into the ladle furnace for refining, de-airing, desulfurization and adjustment of chemical composition as well as temperature. Finally, the ladle containing the qualified liquid steel is hoisted to casting machine where the qualified liquid steel is casted into blooms. There are casting machines with capacity to mach the more than 5 furnaces.

工艺设计与设备选型以简单实用为原则，采用不带加热隧道的50吨高功率偏心底出钢交流电弧炉2座配1台精炼炉配1座连铸机的模式，即2+1+1模式。

In choosing the process and equipment , we follow the principle of simplicity and economical. The main equipment in steelmaking consists of two 50t EBT high power electric arc furnaces with no pre-heating device, one ladle furnace (LF) and one continuous casting machine; it is the so-called 2+1+1 model. 主要设备选型为： Main equipment:

50吨偏心底出钢高功率电弧炉2座； Two 50t EBT high power electric arc furnaces; 50吨LF钢包精炼炉1座； One 50t ladle furnace (LF); R9米三机三流弧形连铸机1座。

One R8m three—motor and three—flow continuous casting machine;

以上设备均为中国成熟设备，结构简单，维护方便，一般的备品备件均可就地解决。 The above equipment are all made in China, with matured technology, simple construction, excellent capability, easy maintence and the spare parts are easily available. 为长远发展考虑，钢包精炼炉可预留抽真空工位。

With future development in mind, there will be space allocated in the LF zone for vacuum device. 2．2 生产方法 production method

炼钢方法为2对1对1的短流程冶炼工艺设置，即2座50吨偏心底电弧炉配1座50吨LF精炼炉配一台R8米三机三流连铸机以及其它辅助设备。所有设备特别是30吨电炉都是国