小型钢铁厂50万吨电炉炼钢、连铸连轧生产线建设草案

and equipment dependability immensely, the cavity of the furnace-arm is water-cooled. 电极升降动作采取液压系统驱动，电液比例阀进行控制，动作灵敏可靠。

The electrode movement is driven by hydraulic pressure. Electro-hydraulic proportional valve controls the movement, it is sensitive and reliable.

炉盖为密排式水冷炉盖，使用寿命可达3000~4000次。炉体上部采用挂渣水冷块，寿命长，并节约大量耐火材料。

Furnace cover consists of closed up water-cooling pipes. The cover can be used for 3000~4000 times. Topside of furnace wall consists of water-cool parts; it has long useful life and save cost of refractory.

2．4．2 钢包精炼炉 ladle furnace 型式：桥架式 Model: Bridge. 台数：1台 Quantity: 1

单台容量：50吨 Nominal capacity: 50 tons. 炉变容量：10MVA Transformer capacity: 10MVA 一次电压：35KV Primary voltage: 35KV

二次电压：300~400V Secondary voltage: 300V~400V

钢包自由空间高度:350mm The ladle free height: 350mm (注：若将来上真空工位时，自由空间大大增加，钢包需重新选型)

电极直径：Φ350mm Electrode diameter: Φ350mm 主要驱动方式：液压。 Driving force: hydraulic pressure 采用水冷炉盖、集束式水冷电缆。

Water-cooling cover and bunch water-cooling cable are used. 精炼炉附近附设吹氩装置，精炼过程全程吹氩。

Near by the LF, there is an argon blow device. Argon blowing is performed throughout the refining process.

2．4．3 连铸系统 continuous casting machine

三机三流R9米弧形连铸机。Casting machine: R9m, 3-motor and 3-flow. 中间包容量：10吨。Tundish capacity: 10 tons.

结晶器结构：管式弧形，窄水缝导流水套式。 Crystallizer: tube-arc type with narrow water crack.

浇注钢种：Ⅱ级与Ⅲ级螺纹钢及小型型钢所涵盖的所有钢种的钢坯，碳素管坯钢，低合金钢。 Steel grade: the bloom to be casted is material for type Ⅱand Ⅲ twisted and section steel. 铸坯断面尺寸：1202mm，1502mm，2202mm，180×220mm矩形坯及Φ220mm圆坯等。 Cast product section size: 1202mm，1502mm，2202mm. 连浇炉数：≥5炉。

2．5 炼钢、精炼及连铸各项主要参数指标main technical and economic indexes 2．5．1 电炉指标 electric furnace No 序号 1 Name 名称 Nominal capacity 电炉公称容量 2 quantity of furnace 电炉座数 3 Inside diameter 炉壳内径 4 Transformer capacity 电炉变压器额定容量 5 Electrode diameter 电极直径 6 Average tapping 平均出钢量 7 Average Smelting period min 平均冶炼周期 8 Annual Operation days 电炉年作业天数 9 Annual capacity 年产钢水量 10 Electricity consumption 电炉吨钢冶炼电耗 kwh/t 450 t 277760×2=555520 d 310 90 t 56 mm Φ450mm MVA 24 mm Φ4700mm Unit 单位 T 吨 座 2 Index 数值 50 11 Electrode consumption 吨钢单极电耗 Kg/t 3.5 12 Oxygen consumption 吨钢综合用氧量 M3/t 48

2．5．2 LF炉指标 LF No Name Unit 单位 t Index 数值 50 序号 名称 1 Nominal capacity 容量 2 Quantity LF炉座数 3 Transformer capacity 变压器额定容量 4 Electrode diameter 电极直径 5 Refining period of LF 精炼周期 6 座 1 MVA 10 mm Φ350 min 30~55 Electricity consumption kwh/t 40 吨钢精炼电耗 7 Electrode consumption 吨钢精炼电极耗 Kg/t 0.5 8 Argon consumption 段钢精炼耗氩量 M3/t 0.3

2．5．3 连铸机指标continuous casting machine No Name Unit 单位 m Index 数值 8 序号 名称 1 Arc Semi diameter 半径 2 Flow 流数 3 Casting speed 拉速 4 Matching capacity 连浇炉数 5 Mould tube consumption 铜管消耗 6 Cooling water consumption M3/t 吨钢连铸耗水 0.6 Furnace quantity ≥5 炉 g/t 40 m/s 流 3 1~3.5

2．6主要原材料main raw material 2．6．1废钢、生铁scrap, pig iron

废钢主要为当地的民用废钢、工业废钢及军用废钢。

Source of scrap mainly from local, industrial, civilian and military supplies. 废钢基本要求： Requirements of scrap: 体积密度：>1.0吨/m3

Geometrical size：Maximum length≤0.6m

几何尺寸：最大长度≤0.6m Maximum section：≤0.5×0.5m 最大断面：≤0.5×0.5m Maximum lump weight：＜1000 kg 最大单块重量：＜1000 kg Impurity contents：≤0.05% 杂质含量：≤0.05% P、S含量低。 P、S contents: Low

废钢严禁混有爆炸物与密闭容器，不得含有毒物质，不得含有油污及有色金属，废钢表面应清洁干燥。

The scrap should not be mixed with sealed containers, explosive，toxic materials, oil residue and non-ferrous metal. Scrap surface must be clear and dry.