JPH0463211A - Apparatus for crushing high temperature slag - Google Patents

Abstract

PURPOSE:To improve fine granulation of high temp. slag by arranging a large bulk crusher to diagonally downward to a raceway part having aperture and inclination and a small bulk crusher for pressing and cooling the small bulk to vertically downward and independently arranging conveying lines for slag under the large bulk and the small bulk crushers, respectively. CONSTITUTION:In a hot continuous crushing apparatus for the high temp. slag, the receiving part 3 having the aperture and the inclination for separating the large bulk to diagonally downward and the small bulk to vertically downward, is arranged. The large bulk crusher 4 is arranged to diagonally downward to the receiving part 3. Further, the small bulk cooling crusher 5 for pressing and cooling the small bulk is set to vertically downward to the receiving part 3. The conveying lines 6, 7 for the crushed high temp. slag are independently arranged under the large bulk crusher 4 and the small bulk crusher 5. By this method, the large bulk high temp. slag and the small bulk high temp. slag are efficiently separated at the same place before crushing and each slag is independently crushed and granulated.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an apparatus for continuously crushing high-temperature slag in a hot state, and the high-temperature slag herein refers to molten slag, base metal, and solidified slag. A mixture of slag and metal.

(Prior art and problems to be solved by the invention) As shown in Japanese Patent Application Laid-Open No. 155183/1983 entitled "Continuous processing equipment for molten slag", molten slag is charged into a rotating trough, There is a cooling crushing device during melting that crushes and granulates molten slag while cooling and stirring the molten slag using a plurality of provided stirring devices. The problem with this conventional technology is that when melting slag and ingots and solidified slag and ingots are mixed, large lumps containing a large amount of molten ingots and small lumps containing little molten ingots are created. Because they are mixed, there are the following problems.

(1) The only melting process that can be crushed and granulated is the melting process that does not contain metal, and it is not possible to sufficiently crush and granulate large-sized high-temperature slag that contains a large amount of metal.

(2) When recovering bullion from slag after crushing and granulation, if there is a lot of slag and small slag that has not been sufficiently crushed and granulated is mixed, the efficiency of bullion recovery using a magnet will be low. Significant deterioration.

To solve the above-mentioned problems of the conventional technology,
As shown in Publication No. 3-58211 "Method and Rod Mill for Recovering Bullion from Slag Generated during Metal Refining", large lumps and small lumps are crushed and granulated, and the granulated material is made into large lumps. There is a crushing device for agglomerated slag, which has an overflow hole and a small-diameter hole to separate the ingots into small agglomerates, and separately collects the ingots using a magnetic separator. The problem with this prior art is that although problem (2) of the prior art described above is solved, problem (1) is not solved. The mechanism of a rod mill is to grind and impact the contents with internal rods and with each other by rotating a drum. For this reason, there is a fundamental problem that since most of the large ingots are large ingots, further crushing and granulation is not possible.

(Means for Solving the Problem) The present invention advantageously solves the problems of the prior art, and the gist thereof is that molten slag and base metal and solidified slag and base metal are mixed. In an apparatus that receives high-temperature slag, cools it, solidifies it, and continuously crushes it in a hot state, it includes: (1) a receiving part having an opening and an inclination to separate large lumps diagonally downward and small lumps vertically downward; (2
) A large lump crusher which is arranged diagonally below the receiving part and has a double-acting pressing mechanism that can press large lumps and can move back and forth; and a large lump crusher which is arranged vertically below the receiving part and which presses small lumps. A small lump crusher having a double-acting pressing mechanism capable of double movement and a cooling mechanism for cooling the small lumps; A high-temperature slag crushing apparatus is characterized in that it is equipped with a high-temperature slag conveyance line.

Hereinafter, the present invention will be explained based on the drawings. FIG. 1 is a schematic diagram showing an embodiment of the present invention.

Reference numeral 1 denotes a receiving pan, which receives hot slag containing a mixture of molten metal and slag in a hot state. 2 is a crane for overturning the receiving pot 1.

The overturning crane 2 is not necessarily necessary, and any mechanism for overturning the receiving pot 1 may be used.

Reference numeral 3 designates a high temperature slag receiving portion having openings and an inclination for separating large hot slag blocks diagonally downward and small lumps high temperature slag vertically downward. 4 is a receiving part 3 for high temperature slag.
This is a crusher for large hot slag, which has a double-acting pressing mechanism that is disposed diagonally downward and can move back and forth while pressing large hot slag. Reference numeral 5 denotes a small high temperature slag which is disposed vertically below the high temperature slag receiving portion 3 and has a double-acting pressing mechanism that can move back and forth while pressing the small high temperature slag, and a cooling mechanism that cools the small high temperature slag. It is a slag crusher. Reference numeral 6.7 denotes conveyance lines for crushed high-temperature slag, which are independently provided below the crusher 4 for large-sized high-temperature slag and the crusher 5 for small-sized high-temperature slag. Note that 8 is a crane for transporting large hot slag to the crusher 4 when the large hot slag remains in the high temperature slag receiving section 3 . The crane 8 is not normally used.

FIG. 2 is a detailed view of the hot slag receiving section 3 according to the present invention. 31 is Grizzly, and the opening is preferably about 500 to 700 mm in width, and 1 in the perpendicular direction to the width.
It has a mesh of about 000 mm. The reason why the opening is preferably about 500 to 700 mm is to ensure that the flow is contained within the grid during high-temperature slag flow.

If the opening is made larger than 700 mm, a large amount of metal and large lumps will pass under the bar, increasing the load on the cooling crusher and reducing the crushing efficiency. If the opening is made narrower than 500 mm,
A large amount of oversized pieces are generated on the bar, increasing the load on the large block crusher. Through these meshes, the large hot slag moves diagonally downward, and the small hot slag falls vertically downward. Note that 32°33 is Grizzly-31
This is a support that supports the lower and upper parts, respectively. By making the support 32 rotatable through a shaft and the height of the support 33 adjustable, the angle of the grizzly bear 31 can be adjusted as desired. This angle is preferably 30 to 50 degrees. If the angle is less than 30 degrees, especially large lumps of high-temperature slag will remain on the grizzly-31 and cannot be smoothly transported to the crusher 4. On the other hand, if the angle exceeds 50 degrees, the large hot slag moves quickly, making it impossible to completely separate the large hot slag and the small hot slag. For this reason, the angle of Grizzly-31 is preferably 30 to 50 degrees. Furthermore, the size of the opening may be changed to various sizes depending on the size of the large lump and the small lump.

FIG. 3 is a detailed view of crushing r, 4 of large hot slag according to the present invention. 41 is a pusher that can be reciprocated in the direction of the arrow by hydraulic pressure or the like. 42 is a side wall that is fixedly arranged. Reference numeral 43 denotes a pressing opposing wall that is fixedly arranged and faces the pusher 41 . In addition, the pusher 41 is preferably made of a hard material such as steel in order to crush and granulate the large lumps of high-temperature slag containing a large amount of molten metal.
It is preferable to use a material that can withstand pressures of from on to several hundred tons/rrr.

Reference numeral 44 denotes a lattice bottom plate having lattice openings fixedly arranged on the side wall 42 and the pressing opposing wall 43.

The opening of this grid is preferably 4 to obtain slag with a particle size that facilitates crushing and iron removal in the subsequent process.
00mm or less. The crushed and granulated large-sized high-temperature slag is fed into the high-temperature slag conveyance line 6 via the lattice bottom plate 44 .

No. 411J(a) is a detailed view of the cooling crusher 5 for small-sized high-temperature slag according to the present invention. Reference numeral 51 denotes a side wall on which a pusher 52, which can be reciprocated in the direction of the arrow by hydraulic pressure or the like, is fixedly arranged. In addition, the pusher 51 is preferably made of a hard material such as a mesh in order to crush and granulate small-sized high-temperature slag containing a large amount of molten metal, and can withstand pressure of several tons to several hundred tons/n per unit area. Reference numeral 53 designates the bottom of the crusher main body, which is composed of a side wall 52 and a pusher 51, and after crushing and granulating the high-temperature slag, it is allowed to move in an open state, and the crushed and granulated high-temperature slag is crushed and granulated at a high temperature. The slag is fed into the slag transport line 7. The slope of the bottom 53 is preferably 1 to 3 degrees.

This slope is designed to drain water to the outside of the vessel so that no moisture remains inside the vessel.If it is greater than 3 degrees, the high temperature slag will flow unevenly when it flows in, resulting in uneven layer thickness. This also complicates the movable surface and device structure. This cooling crusher crushes high-temperature slag with a layer thickness of 200 to 600 m.
It is preferable that the size is such that it can be accepted at m. Although it depends on the amount of treatment, if the layer thickness is less than 200 mm, the receiving area of the crusher will be large, and if the layer thickness is thin, many foamed parts will be generated when water cooling is used, which satisfies the quality of blast furnace slag crushed stone for roadbeds. On the other hand, if the layer thickness exceeds 600 mm, the cooling time becomes long and a large force is required for crushing. When crushing and granulating high-temperature slag, it is better to cool the high-temperature slag to about 800°C with cooling water for better crushing and granulation efficiency.

When the slag temperature exceeds 800°C, the slag is plastically deformed and is difficult to crush. Note that FIG. 4(b) shows a state in which cooling holes 54 are provided in the side wall 52.

(Effects of the Invention) The present invention makes it possible to advantageously solve the drawbacks of the prior art. Specifically, by using the apparatus of the present invention, large-sized high-temperature slag and small-sized high-temperature slag are efficiently separated in the same place before being crushed, and by crushing and granulating each separately, the high-temperature slag becomes significantly finer. Improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment according to the present invention, FIG. 2 is a detailed diagram of a high-temperature slag receiving section 3 according to the present invention, and FIG. 3 is a detailed diagram of a crusher 4 for large-sized high-temperature slag according to the present invention. Fourth
Figures (a) and (b) are detailed views of a crusher 5 for small-sized hot slag according to the present invention. Figure (b)

Claims (1)

[Claims] In an apparatus for continuously crushing high-temperature slag in a hot state, (1) a receiving portion having an opening and an inclination to separate large lumps in a diagonally downward direction and small lumps in a vertically downward direction; (2) A large lump crusher disposed diagonally below the receiving part and having a double-acting pressing mechanism that can press large lumps and move back and forth, and a large lump crusher arranged vertically below the receiving part to crush small lumps. (3) a small lump crusher having a double-acting pressing mechanism capable of moving back while pressing the small lumps; and a cooling mechanism for cooling the small lumps; A high-temperature slag crushing device characterized by comprising: an independently provided conveyance line for crushed high-temperature slag.