6results about How to "Reduce ironmaking costs" patented technology

The invention provides a wet-process injection material for a bosh, a bosh and the lower part of a furnace body of an iron-making blast furnace and a preparation method of the wet-process injection material. The injection material comprises the following components in parts by weight: 3-9 parts of tabular corundum particles of 3-6 mm, 23-33 parts of titanium corundum particles of 1-3 mm, 10-20 parts of titanium corundum particles of 0-1 mm, 0-6 parts of 88 high bauxite particles of 0-1 mm, 0-8 parts of 97 silicon carbide particles of 0-1 mm, 4-12 parts of 97 silicon carbide 45M powder, 6-13 parts of titanium corundum 200M powder, 4-8 parts of tabular corundum 325M powder and 4-7 parts of 71 pure calcium aluminate cement. The invention relates to a high-strength concrete, which is prepared from the following components in parts by weight: 5 to 10 parts of aluminum oxide micro powder, 5 to 10 parts of 96 silicon dioxide micro powder, 0.05 to 0.1 part of additive 1, 0.03 to 0.07 part of additive 2, 0.01 to 0.03 part of additive 3 and 0.05 to 0.1 part of additive 4. The wet-process injection material is used for being sprayed on the bosh, the bosh and the lower part of a furnace body of an iron-making blast furnace for lining making, so that the furnace shape can be quickly recovered, and various performance indexes such as high-temperature performance, wear resistance and slag iron corrosion resistance of the material can be improved, and the service life of the material on the parts can be greatly prolonged.

This invention belongs to the field of blast furnace carbon emission reduction technology and discloses a blast furnace carbon emission reduction ironmaking system and method, including: oxygen-enriched ironmaking with the participation of a mixed reaction gas with high CO2 concentration. Due to the use of CO2 in the blast furnace blast and pulverized coal carrier gas, the oxygen enrichment rate is increased, and the amount of biochar is increased, thereby improving the smelting intensity of the blast furnace, increasing the proportion of pulverized coal replacing coke (increasing the coal ratio and decreasing the coke ratio), reducing ironmaking costs, and reducing carbon emissions. Furthermore, due to the use of CO2 injection and oxygen-enriched ironmaking operations, the amount of air incorporated into the mixed reaction gas is reduced, increasing the concentration of CO and CO2 in the blast furnace gas, which is beneficial for subsequent capture, separation, purification, and resource utilization of different components in the blast furnace gas.

The invention provides a castable for an iron-making blast furnace hearth and a preparation method of the castable. The castable comprises the following components in parts by weight: 8-18 parts of tabular corundum particles with the particle size of 5-8 mm, 9-19 parts of tabular corundum particles with the particle size of 3-5 mm, 15-25 parts of titanium corundum particles with the particle size of 1-3 mm, 9-19 parts of titanium corundum particles with the particle size of 0-1 mm, 0-6 parts of 97 silicon carbide particles with the particle size of 0-1 mm, 6-10 parts of 97 silicon carbide 100M powder, 2-12 parts of 97 silicon carbide 200M powder, 1-9 parts of titanium corundum 200M powder and 10-14 parts of aluminum oxide micro powder. The preparation method comprises the following steps: sequentially adding all the raw materials in the formula into a strong stirrer with the rotating speed of 20r / min, stirring for 5 minutes until the materials are completely and uniformly stirred, sampling and measuring to determine that the construction performance of the material meets the requirement, and bagging and storing. The castable can replace a traditional ceramic cup or other hearth castable, the high-temperature performance, the wear resistance, the slag iron corrosion resistance and other performance of the material are improved, and the service life of the material in a hearth can be greatly prolonged.

The invention provides a device and a method for quickly replacing a dewatering drum buffer tank. The device comprises a steel rail, a trolley and an electric hoist, the steel rail is detachably mounted in the dewatering drum and is positioned above all the buffer tanks in the dewatering drum; the trolley is mounted on the steel rail in a sliding manner; a lifting lug structure is mounted at the top of the buffer tank; the front part of the trolley is fixedly provided with a trolley hook, and the side surface is fixedly provided with a trolley hook; the trolley lifting hook is used for being connected with the lifting lug structure through a steel wire rope, so that the buffer box is connected with the trolley; and the electric hoist is used for being connected with the trolley hook through a steel wire rope, so that the trolley and the buffer box which are connected together are pulled out of the dewatering rotary drum along the steel rail. According to the technical scheme, the problem that an existing water granulated slag buffer tank is inconvenient to disassemble and overhaul is solved.

The invention discloses blast furnace mixed injection pulverized coal and a coal blending method, and belongs to the technical field of blast furnace injection pulverized coal. Brown coal, long flame coal and anthracite are creatively mixed, the novel blast furnace mixed injection pulverized coal is provided, the high volatile component of the brown coal and the high calorific value of the long flame coal are fully utilized through the accurate coal type proportion, meanwhile, the low volatile component characteristic of the anthracite is combined, and sufficient combustion of the mixed pulverized coal in the blast furnace injection process is achieved; meanwhile, the combustion process of the pulverized coal is stabilized due to the low volatile component characteristic of the anthracite, so that the safety of the ironmaking process is ensured; in addition, the invention further provides a coal blending method of the mixed pulverized coal, by means of the method, the combustion efficiency of the pulverized coal is remarkably improved, the safety and economical efficiency of the ironmaking process are improved, and a new solution is provided for efficient, safe, economical and environment-friendly pulverized coal injection of a blast furnace.

The preparation method comprises the following steps that S1, 0.5-1.5 parts of quick lime and 2-5 parts of sulfuric-acid residues are mixed and then ground to obtain a first mixture, and 93-96 parts of vanadium-titanium magnetite concentrate, 1-2 parts of a binding agent and the first mixture are evenly mixed to obtain a second mixture; s2, pelletizing the second mixture in a disc pelletizer to obtain green pellets; and S3, the green pellets obtained in the step S2 are dried, preheated, roasted and cooled, and the sulfuric-acid residue vanadium titano-magnetite oxidized pellets are prepared. According to the method, the solid waste resource sulfuric-acid residue is added into the vanadium titano-magnetite pellet raw material to prepare the sulfuric-acid residue vanadium titano-magnetite oxidized pellet, the utilization rate of the sulfuric-acid residue is increased, the problems of land occupation caused by accumulation of the sulfuric-acid residue and environmental pollution can be relieved, for the vanadium titano-magnetite pellet, the TFe grade of the pellet ore can be increased by adding the sulfuric-acid residue, and the yield of the pellet ore is increased. And the blast furnace smelting charging grade is improved, and the ironmaking cost is reduced.