Reconstruction And Application In Taigang 300m～3 Blast Furnace Charging System

Blast Furnace No.2 was built in 1930s.The inner volume of Blast Furnace No.2 was 296m3.The top was equipped with double-bell and double-skip skew bridge charging. Now the inner volum of Furnace is 324m3,but the production below storehouse was in a state of draggle yet and the metage vehicle of ore and coke was being used today. The metage vehicle of ore was mechanical and there was not screening facility in the part of ore, so there was the problem of slowly speed of charging, the low metage precision, the high fault rate of equipment, high dust rate in ore charged into furnace, difficult organize condition of station operation etc. It was difficult to meet the increasing intensify melting need of the blast furnace.lt restricted the plenty exertion of the poduction capacity of the Blast Furnace a certern exent.At the same time, the labour environment was bad because there was not removing dust facility below the storehouse.The main target of the reconstruction below the storehouse is to make all charging system have the characteristic of automatization control, expediently operation, exactly quantify briefly maintenance, high efficiency screen and good effect of removing dust, to decrease the dust content into the furnace, create good condition for stability run of the furnace, for the further itensify melting, for saving coke and increasing iron production.To reasonably use the primary charging facility of the blast furnace, aim at the abuse of raw facility, we progress a fully renovate and reconstruction from process layout toequipment election according to the principle of utility and safety. Aim at the detail abuse, we increase the screen facility below the storehouse, sift the sinter dispersed, quantify concentrated, transport by strap. Strobe and turned plank below storehouse be changed to fluid drive, metage be changed to electrode balance and equipped with controlling by PC, realize the automation compensation for metage and automation print for charging.Election of type and calculation was made to vibration sceen of ore and coke and to strap machine of conveying of coke and ore; The election was made to matching establishment and verifying calculation was made to capacity of facility. The dust rate (<5%) into furnace was >20% before recontruction,so the production target was not ideal.Because the facility was renewed, the automatization degree was icreased and the problem of removing dust was resolved,the dust rate decreased to 7.28% after the sinter been sreened and the charging capacity of system was greatly increased. In recently years, the utilize coefficient reached to 2.392 by take step of injection,flne material,high blast temperature and oxygen enrichment.The recontruction below storehouse system create the condition for realizing greatly injection coal into blast furnace and further intensify smelting,so the utilize coefficient obtain 2.829,the pulverized coal rate to 133kg/t,me coke rate to 417kg/t on September on 2002. Now the main technique targets of blast furnace No.2 have created the best level since the blast on and the production been stablized.The reliability project to equipment management of the metallurgy enterprise had been applied and the situation of a single facility or a system facility been described from qualitative analysis to ration, so the structure mode be optimized. The scientific guide can be made to the maintenance management of system facility or single facility, on the basis of it, we can guide the maintenance of facility to ensure that reliability of system equipment. The system equipment can create the optimized production benefit for enterprise under the economy running condition and promote the metallurgy enterprise management develop to the modernization direction.