JPWO2024018916A5 - - Google Patents

Claims (8)

A granulated iron manufacturing apparatus having a granulation device for turning molten iron into droplets and a cooling water tank for dropping the droplets into cooling water to cool them,
a water flow control vessel provided in the cooling water tank and having upper and lower open ends; and a group of cooling water pipes for supplying cooling water into the water flow control vessel,
The water flow control vessel has a partition cylinder having an inclined surface inclined so that the horizontal cross-sectional area narrows downward, and a duct cylinder connected to the lower part of the partition cylinder,
the cooling water pipe group includes an upper stage cooling water pipe group and a middle stage cooling water pipe group connected to the partition cylinder, and a lower stage cooling water pipe group connected to the duct cylinder,
the upper stage cooling water pipe group is connected to an upper stage of an inclined surface including an upper end of the partition cylinder, and a cooling water flow is generated along the inclined surface from above to below by the cooling water supplied from the upper stage cooling water pipe group,
the middle stage cooling water pipe group is connected horizontally to a middle stage of the inclined surface of the partition cylinder toward the cylinder core of the partition cylinder, and the cooling water supplied from the middle stage cooling water pipe group flows toward the cylinder core of the partition cylinder, joins with the cylinder core and rises, and generates a first circulating flow that circulates within the partition cylinder together with a cooling water flow that runs along the inclined surface from above to below;
The lower cooling water pipe group is connected to the side of the duct cylinder, and a second circulating flow circulating within the duct cylinder is generated by the cooling water supplied from the lower cooling water pipe group and the drainage from the partition cylinder. A water flow control vessel is provided below the water flow control vessel.
The apparatus for manufacturing granulated iron according to claim 1 , further comprising a transport device for transporting the granulated iron cooled in the water flow control vessel to outside the cooling water tank. The granulated iron manufacturing apparatus according to claim 1 or 2, further comprising a control device for controlling the amount of cooling water supplied from the cooling water pipe group to the water flow control vessel, the control device controlling the amount of cooling water supplied from the cooling water pipe group so that the amount of cooling water supplied from the cooling water pipe group decreases in the order of the middle stage cooling water pipe group, the upper stage cooling water pipe group, and the lower stage cooling water pipe group. The granular iron manufacturing apparatus according to claim 1 , further comprising a protrusion covering an upper side of a connection portion where the upper stage cooling water pipe group and/or the middle stage cooling water pipe group are connected to the inclined surface. The granular iron manufacturing device according to claim 4, wherein the cross-sectional shape of the protrusion is an inverted V-shape or an inverted U-shape that widens from above to below. An apparatus for manufacturing granulated iron as described in any one of claims 1 , 4 and 5, wherein the upper stage cooling water pipe group has a protective cover covering the upper side of the connection portion connecting to the inclined surface, and the upper end of the protective cover is closed. The granular iron manufacturing device according to claim 6, wherein the cross-sectional shape of the protective cover is a semicircular or semi-elliptical shape expanding from top to bottom. A method for producing granulated iron using the granulated iron manufacturing apparatus described in claim 1 or claim 2 , wherein the amount of cooling water supplied from the cooling water pipe groups decreases in the order of the middle stage cooling water pipe group, the upper stage cooling water pipe group, and the lower stage cooling water pipe group.