35results about How to "Improve the strength of sinter" patented technology

The invention discloses a microwave sintering method for iron ore. Iron ore, flux, returned ore and iron-containing solid waste are batched, mixed and granulated, and then directly loaded into the sintering machine with the paved bottom material by means of round roller feeding. On the trolley; the sintering trolley filled with the mixture will go through the first stage of preheating, the second stage of preheating, the microwave heating stage, the microwave sintering stage, the first stage of cooling, the second stage of cooling and the third stage of cooling according to the set moving speed. The mixture is preheated, heated, sintered and cooled to form ore, and then crushed and screened to obtain the finished sintered ore. By adopting the invention, no fuel is used, most of the flue gas can be recycled, and the problem of pollutant discharge in the iron ore sintering process can be completely solved, energy consumption can be reduced, and green production can be realized.

The invention discloses a metallurgical sintering synergist and a preparation method and application thereof. By weight percentage, the synergist is prepared from the following raw materials: steel slag 35~65%, polyethylene glycol 0.1~2%, fluorite 2~8%, potassium permanganate 0.05~2.5%, hydrogen peroxide 0.5~ 8%, ammonium metavanadate 1~5%, waste activated carbon 0.5~2%, and the balance is water. The invention can improve the quality of the sintered ore drum, improve the vertical sintering speed, improve the particle size composition of the sintered ore, and improve the RDI by optimizing the compound material and the use of the synergist. +3.15 , improve the reduction degree and droplet performance, reduce energy consumption.

The invention belongs to the field of metallurgy and mainly relates to a manufacture method for preparing a high titanium high pH value sintering ore by a v-ti magnetite concentrate ore. The technicalproblem needed to be solved is to provide a preparation method which takes the high titanium v-ti magnetite concentrate ore specially owned by Panzhihua as the material to prepare the high titanium high pH value sintering ore. The method is mainly characterized by taking the high titanium v-ti magnetite concentrate ore as the material with a sintering temperature of 1300 to 1400 DEG C. The technique of the invention applied to prepare the sintering ore is simply controlled; the high pH value sintering ore obtained by sintering is smelted; the technical economic indexes like the operating factors of a blast furnace, a coke ratio, a coal ratio, etc, and the like, are all improved. The method of the invention essentially improves the minimal components of a v-ti sintering ore, improves the intensity of the sintering ore and improves the metallurgy performance by improving the pH value of the v-ti sintering ore to 2.0 to 3.2, controlling a proper carbon addition amount and increasing theamount of a liquid phase.

The invention relates to an ultra-thick material layer oxygen-enriched sintering production method. The method comprises the steps that two times of material distribution and two-time ignition is carried out, an upper-layer sintering mixture and a lower-layer sintering mixture are correspondingly provided with an oxygen generator, the sintering raw material and the fuel are subjected to primary uniform mixing and secondary mixing granulation to prepare a sintered mixture A, and an oxygen preparation agent solution is additionally added during the primary uniform mixing and the secondary mixinggranulation; the sintering raw material and the fuel are subjected to the primary uniform mixing and the secondary mixing granulation to prepare a sintered mixture B, and the oxygen preparation agentsolution is additionally added during the primary uniform mixing and the secondary mixing granulation; the sintering mixture A is added to a sintering trolley through a first distributor on the machine head of the sintering machine; the oxygen preparation agent solution in the sintering material in the lower direction of the first distributor is sprayed; and the sintering mixed material B is added to the surface of sintered ore, and an oxygen preparation agent solution is sprayed on the sintering material surface. The method has the advantages that oxygen is generated by high-temperature decomposition of the oxygen generator, and the oxygen is uniformly enriched at different parts of the sintered material layer; and the strength of the sintered ore is improved, and the fuel consumption ofthe sintered solid is reduced.

The invention relates to the field of sintered ore production adopting vanadium titano-magnetite, and particularly provides a compound additive, a preparation method thereof and application of the compound additive in sintered ore production adopting the vanadium titano-magnetite. The compound additive contains, by weight, 1-5% of Ig, 70-90% of CaO, 0.1-4% of MgO, 0.01-5% of SiO2 and 0.1-1% of B2O3. The preparation method comprises the step that active lime, an organic binding agent, a selective mineralizer and a selective additive are blended and subjected to mixing. The compound additive is applied to the sintered ore production process adopting the vanadium titano-magnetite, the current situation that in the traditional sintered ore production process with the vanadium titano-magnetite as the main raw materials, pelleting and sintering are difficult is avoided, the proportion of reasonable particle sizes in the pelleting process is increased, liquid phase generation in a low temperature stage of the sintering process is promoted, sintering is strengthened, the strength of sintered ore is improved, and the yield rate of the sintered ore is increased.

The invention discloses a sintering additive, which comprises the following parts: 20wt%-60wt% composite mineralizer,10wt%-30wt% oxidizing catalyst,15wt%-40wt% oxygenation agent and 10wt%-30wt% protective. The additive can improve sintering oaring strength, which reduces energy consumption effectively.

The present invention discloses an ultra-low temperature sintering mineralization energy-saving additive. It contains (wt%) 10-60% of ultra-low temp. mineralizer, 10-30% of oxygenation agent, 10-40% of melting agent, 10-40% of catalyst and 0-30% of pore-forming agent. Said invention is a powder agent made up by mixing all the above-mentioned materials. Said invented additive has the actions of catalytic improving combustion, inhibiting 2CaO2 and SiO2 undesirable transformation in the sintering process, promoting main binding phase SFCA formation of sintering ore, inhibiting low-temperature reduction pulverization action and raising catalytic sintering process, etc.

The invention discloses a device and a process for generating power through efficient recovery of waste heat of sintered ores and belongs to the technical field of cogeneration. The device comprises a sintered ore cooling system, a waste heat power generating system and a smoke system, wherein the sintered ore cooling system and the waste heat cycling power generating system are connected through the smoke system to form a loop. The process comprises the steps of 1), cooling of sintered ores; 2) the smoke system; and 3) waste heat power generating. The device and the process for generating power through waste heat have the advantages that discharged waste heat is used fully during cooling of sintered ores, the electric energy production is improved significantly, the power rate of the system is reduced significantly, and the energy-saving effect is significant.