The Technology Majorization On Sintering Of High Chromium Vanadium-Titanium Magnetite Ore

The high chromium vanadium-:titanium magnetite ore is a kind of polymetallic symbiosis ore being rich in beneficial elements such as Fe, V, Ti and Cr, its reserves are extremely rich all over the world and mainly concentrated in a few countries, such as Russia, American, China and South Africa.In view of our country’s iron ore resources is insufficient, need import a lot and the price of the iron ore resources rises gradually. In order to remit its crying needs, a steel enterprise takes full advantage of the geographic scope, actively broaden the channels of iron ore resources, import the high chromium vanadium-titanium magnetite ore; meanwhile, retrieve valuable resource, such as V, T and Cr, to increase the enterprise’s benefit. However, because of the particularity of the high chromium vanadium-titanium magnetite ore, industrial production and theory research are immature. Hence, in order to provide significant reference to the scientific researchers who are engaged in correlation theory and offer technical support and theoretical direction to the sintering production, it is necessary to study its features.Therefore, this text study the effect of carbon addition, basicity and boron-bearing iron concentrate addition on the agglomerate’s cold metallurgical performances (such as vertical sintering speed, sinter yield, tumbler strength and utilization coefficient) and RDI+3.15of sinters. The purpose of this study is by means of laboratory research, providing reasonable sintering technological parameter to the industrial production of the high chromium vanadium-titanium magnetite ore and offer agglomerate with favorable quality to the blast furnace.The conclusions are as follows:(1) With the increase of carbon addition, vertical sintering speed, firing rate and tumbler strength decrease gradually, sinter yield increases and then deceases,when the carbon addition is5.5%, sinter yield is83.98%; utilization coefficient increases and then deceases, when carbon addition is4.5%, utilization coefficient is1.965t·(m2·h)-1, RDI+3.15of sinters increases gradually, its maximum value is93.19%; composite indicator increases then decreases,.when carbon addition is5.0%, its maximum value is331;(2) With the increase of basicity, vertical sintering speed, sinter yield, tumbler strength and utilization coefficient increase gradually, firing rate decreases gradually. RDI+3.15of sinters is improved gradually; composite indicator increases gradually, when basicity is2.7, its maximum value is389;(3) With the increase of boron-bearing iron concentrate addition, vertical sintering speed, sinter yield, tumbler strength, utilization coefficient increase then decrease, when boron-bearing iron concentrate addition is5.0%, their maximum values are28.84mm·min-1、81.02%、61.2%and1.919t·(m2·h)-1, respectively; RDI+3.15of sinters increases gradually, its maximum value is90.76%; composite indicator increases and then decreases, when boron-bearing iron concentrate addition is5.0%, its maximum value is365.