Abstract: The present invention discloses a extra thick hot rolled H section steel and a production method therefor. The extra thick hot rolled H section steel contains, by mass, the following chemical components: 0.04-0.11% of C, 0.10-0.40% of Si, 0.40-1.00% of Mn, 0.40-1.00% of Cr, 0.10-0.40% of Cu, 0.020-0.060% of Nb, 0.040-0.100% of V, 0.010-0.025% of Ti, 0.010-0.030% of Al, 0.0060-0.0120% of N, not more than 0.015% of P, not more than 0.005% of S, not more than 0.0060% of O, and the balance Fe and trace residual elements, wherein 0.090%?Nb+V+Ti?0.170%, 6.5?(V+Ti)/N?10.5, and 0.30%?CEV?0.48%. The extra thick hot rolled H section steel has a flange thickness of 90 mm-150 mm, has excellent comprehensive mechanical properties, and can well meet the needs for heavy supporting structural parts of high-rise buildings, large squares, bridge structures, etc.

Abstract: Disclosed are a reduction roasting device and a method for recovering lithium from a waste lithium battery. The reduction roasting device includes a microporous slide (1), a quartz tube (3), a vertical tube furnace (7), a protective gas cylinder (5-1), and a reducing gas cylinder (5-2), wherein the protective gas cylinder (5-1) and the reducing gas cylinder (5-2) are each in communication with a bottom of the quartz tube (3); the quartz tube (3) is placed inside the vertical tube furnace (7); and the microporous slide (1) is located inside a chamber (3-1) of the quartz tube (3), and a diameter direction of the microporous slide (1) is perpendicular to a length direction of the chamber (3-1) of the quartz tube (3).

Abstract: The present invention discloses a extra thick hot rolled H section steel and a production method therefor. The extra thick hot rolled H section steel contains, by mass, the following chemical components: 0.04-0.11% of C, 0.10-0.40% of Si, 0.40-1.00% of Mn, 0.40-1.00% of Cr, 0.10-0.40% of Cu, 0.020-0.060% of Nb, 0.040-0.100% of V, 0.010-0.025% of Ti, 0.010-0.030% of Al, 0.0060-0.0120% of N, not more than 0.015% of P, not more than 0.005% of S, not more than 0.0060% of O, and the balance Fe and trace residual elements, wherein 0.090%?Nb+V+Ti?0.170%, 6.5?(V+Ti)/N?10.5, and 0.30%?CEV?0.48%. The extra thick hot rolled H section steel has a flange thickness of 90 mm-150 mm, has excellent comprehensive mechanical properties, and can well meet the needs for heavy supporting structural parts of high-rise buildings, large squares, bridge structures, etc.

Abstract: An easily connected and assembled eyeglass frame comprises a frame, a pair of temples and two connecting assemblies, both sides of the frame are provided with a recess, the recess is provided with an upper and a lower column-shaped hole respectively. The connecting assembly is connected to the temple, two cantilevers extend from an upper end, an upper column protrudes upward from one of the cantilevers, a lower column protrudes downward from the other cantilever. The upper and lower columns are engaged in the upper and the lower column-shaped holes respectively. The top ends of the upper column and the upper column-shaped hole are provided with a cross-shaped shallow groove or a cross-shaped protrusion respectively that are engaged with each other. The frame and the temples are connected without using screws, which can reduce the cost. In addition, the temples are symmetrical, and the connecting assemblies have good elasticity.

Abstract: An easily connected and assembled eyeglass frame comprises a frame, a pair of temples and two connecting assemblies, both sides of the frame are provided with a recess, the recess is provided with an upper and a lower column-shaped hole respectively. The connecting assembly is connected to the temple, two cantilevers extend from an upper end, an upper column protrudes upward from one of the cantilevers, a lower column protrudes downward from the other cantilever. The upper and lower columns are engaged in the upper and the lower column-shaped holes respectively. The top ends of the upper column and the upper column-shaped hole are provided with a cross-shaped shallow groove or a cross-shaped protrusion respectively that are engaged with each other. The frame and the temples are connected without using screws, which can reduce the cost. In addition, the temples are symmetrical, and the connecting assemblies have good elasticity.