4 results about "Hercynite" patented technology

The application relates to the technical field of refractory materials, and particularly discloses a hercynite-mullite solid solution raw material and a preparation method thereof. The preparation method of the hercynite-mullite solid solution raw material comprises the following steps: after low-grade high-iron bauxite is crushed and homogenized, the low-grade high-iron bauxite is subjected to a flotation desilication treatment; the ore slurry after the flotation is subjected to a magnetic separation and iron removal treatment, so that the content of Fe2O3 in the ore slurry is controlled to be below 9 wt%; a carbon source is introduced into the ore slurry after the magnetic separation and iron removal, the ore slurry is uniformly mixed, and then the ore slurry is subjected to drying, shaping and sintering in a carbon-embedded atmosphere, and the hercynite-mullite solid solution raw material is obtained. The application realizes high-value and high-quality utilization of the low-grade high-iron bauxite. Through the flotation desilication and magnetic separation and iron removal processes, the contents of SiO2 and Fe2O3 in the raw material are effectively controlled, the low-grade ore which is originally difficult to be directly utilized is converted into qualified refractory material raw material, and the resource utilization efficiency and economic value are greatly improved.

The utility model discloses compacting equipment for producing high-density magnesium-hercynite sand bricks, which comprises a four-column hydraulic press body, a pressing block is mounted at the lower end of a pressing head of the four-column hydraulic press body, an upper template is assembled and connected to the lower end of the pressing block, a die mounting port is arranged on a working table of the four-column hydraulic press body, and the die mounting port is connected with the upper template. The utility model relates to the technical field of production of high-density magnesium hercynite sand bricks, magnesium hercynite sand raw material powder is poured into the mold groove, the pressing head is used for pushing the pressing block and the upper mold plate to move downwards, the mold groove is formed in the position of the mold installation opening, and the step boss is arranged at the lower end of the mold groove. And after compaction is completed, the pressing head is controlled to reset, the pushing hydraulic cylinder is used for pushing the sliding frame to move upwards, and therefore the formed green brick is ejected out to the workbench, the telescopic end of the core pulling hydraulic cylinder is controlled to be recycled, and the core mold is automatically pulled out of the green brick. And taking down the green brick.

The utility model discloses a high-density magnesia-hercynite sand brick body structure which comprises a brick body building block formed by firing high-density magnesia-hercynite sand serving as a base material, the brick body building block is of a cuboid structure, a top limiting protruding block is arranged on the top of the brick body building block, and a top limiting protruding block is arranged on the top of the brick body building block. A bottom limiting groove is formed in the position, corresponding to the top limiting protruding block, of the bottom of the brick body building block, and a side limiting protruding block is arranged on one side of the brick body building block. The top limiting protruding blocks and the bottom limiting grooves on the brick body building blocks are matched so that the brick body building blocks can be aligned and positioned in the vertical direction in the building process, and the limiting protruding blocks on the side portions of the brick body building blocks are matched with the corresponding side portion limiting grooves so that quick centering building of the brick body building blocks on the same layer can be achieved. And the overall structural strength of the built wall body can be further improved through the inserting and sleeving type matching mode.

An anti-coking surface having a thickness up to 15 microns comprising from 15 to 50 wt. % of MnCr2O4 (for example manganochromite); from 15 to 25 wt. % of Cr0.23Mn0.08Ni0.69 (for example chromium manganese nickel); from 10 to 30 wt. % of Cr1.3Fe0.7O3 (for example chromium iron oxide); from 12 to 20 wt. % of Cr2O3 (for example eskolaite); from 4 to 20 wt. % of CuFe5O8 (for example copper iron oxide); and less than 5 wt. % of one or more compounds chosen from FeO(OH), CrO(OH), CrMn, Si and SiO2 (either as silicon oxide or quartz) and less than 0.5 wt. % of aluminum in any form provided that the sum of the components is 100 wt. % is provided on steel.