4results 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 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.