250高炉技术方案

1 概述General

建成一座250m3高炉及相应的辅助设施，生产规模为25万吨炼钢铁水，同时建设相配套的铸铁机、喷煤站、高炉煤气发电等设施。

The scope of design includes a 300 m3 BF and auxiliary facilities matching pig casting machine, PCI station and power plant running BF gas etc. The production capability of hot metal is 0.28mtpa.

2 设计依据Design basis

2.2工程技术资料要求。Requirements of engineering technical documents

3 建设规模、产品、工艺流程及物料平衡

Construction scale, products, process flow and material balance

3.1 建成后的工程规模为：Project scale after completion

年产25×104t炼钢铁水，全部供给炼钢车间，可生产25万吨钢。

0.28mtpa hot metal production for steel-smelting will all going to pig casting plant which can produce 0.3mtpa steel.

3.2 工艺流程及物料平衡Process flow and material balance

按年产25×104t铁水进行前后工序平衡，详见物料平衡图：

The balance is made in all the process procedure according to

28×104tpa.Details are shown in the following material balance chart.

物料平衡图单位：104t/a material balance chart unit: 104t/a 矿粉燃料熔剂

Fines Fuel Flux

37.4 1 1.87 7.47

↓ ↓ ↓

36m2 sintering machine lump ore coal coke

（sinter）38 16.15 3.75 14.50 ↓ ↓ ↓ ↓

300 m3BF

↓ ↓ ↓

Water slag 12.32hot metal28BF gas

6.5×104Nm3/h

↓

Pig casting workshop

250m3高炉主要技术经济指标表320m3 main technical economy index table

4.工程建设的主要内容Main contents of project construction

炼铁系统包括矿槽及槽下筛分供料设施、料车及卷扬、炉顶装料设备、高炉本体、风口平台出铁场、热风炉、煤气粗除尘、煤气净化、渣处理系统、铸铁机、鼓风机站、出铁场和矿槽除尘等。

Iron-making system include ore bunker, screen and supply equipment under bunker, skip car, skip hoist, furnace top charging equipment, BF proper, tuyere platform and cast house, hot blast stove, gravity dedusting ,gas cleaning system, slag granulation system, pig casting machine ,blower station cast house and ore bunker de-dusting etc.

4.1 矿槽及槽下筛分供料系统Ore bunker, screen and supply equipment under bunker

矿槽布置为单排布置，共设有10 个矿槽，其中2 个焦炭槽、4 个

烧结矿槽、2 个球团矿(块矿)槽、一个熔剂槽和一个杂矿槽。采用分散筛分、称量工艺。

Ore bunker adopt Single-line arrangement ,there are 10 ore bunkers in total(2coke bunkers,4sinter ore bunkers 2 pellet (lump ore)bunkers,1 flux bunker,1 mixed ore bunker ).Separated screening and weighing process is adopted.

4.2 料车及卷扬Skip car and hoist

采用双料车斜桥上料，共用一套卷扬，料车有效容积为2.5m3，卷扬能力6t，交流变频传动，电机功率100kW。

The charging system uses double skip car for charging through skip bridge with one set of hoist. The effective volume of skip car is 2.5m3,hoist’s capacity is 6t,AC frequency conversion drive, the motor power is 132kW. 4.3 炉顶装料设备Furnace top charging system

采用串罐无料钟炉顶，固定受料斗有效容积10m3，设计炉顶压力0.08～0.12MPa，正常炉顶温度150～300℃，炉顶均压系统一次均压采用煤气，二次均压采用N2，均压阀采用液压驱动（与槽下合用液压站）。

Bell-less top with serial hopper is adopted. Effective capacity of the receiving hopper is 10m3 furnace top pressure is 0.08～0.12MPa,the normal furnace top temperature 150～300℃,the equalizing pressure system of furnace top uses gas for the first pressure equalization and uses nitrogen for the second pressure equalization, equalizing pressure valve is hydraulic pressure driven(sharing the same hydraulic pressure station under bunker)