US3140676A

US3140676A - Refractory brick units

Info

Publication number: US3140676A
Application number: US265990A
Authority: US
Inventors: Lorne R Duncan
Original assignee: Harbison Walker Refractories Co
Current assignee: Harbison Walker Refractories Co
Priority date: 1963-03-18
Filing date: 1963-03-18
Publication date: 1964-07-14
Anticipated expiration: 1981-07-14

Description

July 14, 1954 L. R. DUNCAN REFRACTORY BRICK UNITS Filed MaIOh 18, 1963 INVENTOR.

OP/VIA. @UA/64N ,arrafMi-'y ite te This invention relates to refractory brick units and particularly of the type having a suspension tab at its upper end.

For convenience in assembling refractory brick in furnaces various suspension means, including a so-called tab, have been employed in brick of a variety of constructions. The time and effort consumed in placing refractory brick in furnaces during construction and repair of the latter is an important consideration for the operator of such furnaces. It will be recognized, for example, that the time consumed in the repair of furnace walls is lost time insofar as operation of the furnace is concerned. Thus, a brick construction which reduces this time loss and facilitates the assembly of the brick is of real value.

The object of this invention is to provide a brick unit of improved construction which is readily assembled, in a furnace wall. Essentially the brick unit of the invention comprises a moulded block of refractory material, a recessed metal plate extending longitudinally of a face of the block and at least partially across the central portion of the upper end of the block and at least one recess in the upper end of the block to expose the edge of the centrally located metal plate.

The invention is shown in the accompanying drawings in which FIGURE 1 is a perspective front view of the unit;

FIGURE 2 is a perspective top view of the unit;

FIGURE 3 is a fragmentary vertical section taken on the line III-III of FIGURE 1.

In the drawings, a moulded refractory block 1 has a front or side face 2, an upper end face 3 and a metal suspension tab 4 extending partially across the upper end, flush with its surface. Since the tab is used to hang the block, the end to which it is attached is the end of the block which is colder in service. Such an end is commonly referred to as the cold face as distinguished from the hotter end which is exposed to the high temperatures of a service environment and which is commonly referred to as the hot face in the refractories and metallurgical arts. The side faces 2 and 2A, as shown in the drawings (FIG. 1 shows it best), can be described as opposed and substantially parallel side faces. The tab, which is mounted over the colder end of the block, is generally L shaped, as is clearly shown in FIG. l. The tab is narrower than the block and has an arm 4A extending downwardly of the front face 2, in which it is embedded and anchored by means of refractory material extending into an opening S formed through the channel 13 and the arm 4A. The dashed line circles above and below the opening 5 are intended as schematically indicative of Welds holding the channel and arm 4A together. The upper part or arm 4B of the tab has a recess 6 to receive a hanger element when extending upwardly as shown in FIGURE 2.

In moulding the refractory material into a block, the upper end of the block is provided with three parallel

transverse sections

7, 8 and 9, and With a groove or recess It) between adjacent sections to expose the edges of the tab 4. As shown in FIGURE 3, the opposite side edges of portion 12 of the suspension tab partly overlie grooves lil, so that a suitable tool can be inserted in one of the grooves and beneath the overlying edge of the tab to bend the tab up away from the block. Tab portion 12 lies in a depression 11 in the centrally disposed secater tion 8 of the block, thus leaving the top face of the brick lying in a single plane. This construction facilitates piling and shipping of the brick units and at the same time makes it easy to bend the portion 12 of the tab into vertical position when installing the unit in a furnace.

It will be recognized that-this construction has several advantages and overcomes difficulties in use of this general type of brick. It avoids the necessity of chipping away the refractory material in bending the tab into vertical position. As particularly shown in FIG. 2, the construction of the central transverse section 8 facilitates lifting of the tab and avoids its folding into the end of the refractory block during construction of the brick.

The tab member may be made of any desired metal. It is desirable that the vertically disposed portion of the tab and the metal channel 13 be made of an oxidizable metal, like iron, to provide best bonding results with the refractory material when the unit is heated in the furnace. Since the member 13 is a channel and is generally U shaped, it accurately can be described as having an outer web portion 13A which rests in the side face 2, which web extends between two unidirectionally extending side pieces or legs 13B and 13C which extend into the body of the block. FIGS. 1 and 3 both show this web and leg construction very clearly.

This is a continuation-in-part of application Serial Number 40,011, filed June 30, 1960, now abandoned.

I claim:

1. In a refractory brick unit:

(A) a block of refractory material,

(l) having at least one pair of opposed, substantially parallel side faces,

(2) and having a pair of end faces, a first one being a cold face and the scond one being a hot face, the hot face and cold face both being substantially perpendicular to the opposed parallel side faces;

(B) a channel-like member,

(l) including a flat web portion and a pair of unidirectionally extending legs,

(2) fabricated of an oxidizable metal,

(3) being shorter than the opposed side faces,

(4) being mounted substantially centrally through a first of the opposed side faces,

(i) with its legs extending inwardly of the block but terminating short of the other opposed side face,

(ii) with one of its ends terminating short of the cold face;

(C) a bendable L shaped member,

(1) having a pair of straight arms which join each other at approximately a angle encompassing an edge of the cold face,

(2) fabricated of an oxidizable metal,

(3) a first arm,

(i) at least a portion of which is mounted along the rst opposed side face,

(ii) only a portion of which is rigidly held in position by the end of the web of the channel-like member which terminates short of the cold face,

(4) the other arm extending from the iirst opposed side face substantially centrally across the cold face,

(i) but terminating short of the other opposed side face,

(ii) being narrower than the cold face,

(iii) being embedded in a depression in the cold face,

(iv) its outer face lying in substantially the same plane as the cold face,

(v) means formed therein for hanging the unit;

(D) at least one groove extending across the cold face,

(1) parallel to an edge of the L shaped members arm which is embedded in the cold face,

(i) exposing that edge.

2. The brick unit of claim 1 in which a major portion of the rst arm is mounted along the rst opposed side face beneath the end of the web of the channel-like member which terminates short of the cold face.

3. The brick unit of claim 1 in which there are two parallel grooves formed across the cold face each one eX- l posing an edge of the L shaped members arrn which extends across the cold face.

4. The brick unit of claim 1 in which the first arrn of the L shaped member includes means to anchor it to the refractory material of which the block is fabricated.

References Cited in the file of this patent UNITED STATES PATENTS 1,980,646 Vickerilla NOV. 13, 1934 2,653,851 Davidson Sept. 29, 1953 2,932,265 Heuer Apr. 12, 1960 3,051,101 Heuer Aug. 28, 1962

Claims

1. IN A REFRACTORY BRICK UNIT: (A) A BLOCK OF REFRACTORY MATERIAL, (1) HAVING AT LEAST ONE PAIR OF OPPOSED, SUBSTANTIALLY PARALLEL SIDE FACES, (2) AND HAVING A PAIR OF END FACES, A FIRST ONE BEING A COLD FACE AND THE SECOND ONE BEING A HOT FACE, THE HOT FACE AND COLD FACE BOTH BEING SUBSTANTIALLY PERPENDICULAR TO THE OPPOSED PARALLEL SIDE FACES; (B) A CHANNEL-LIKE MEMBER, (1) INCLUDING A FLAT WEB PORTION AND A PAIR OF UNIDIRECTIONALLY EXTENDING LEGS, (2) FABRICATED OF AN OXIDIZABLE METAL, (3) BEING SHORTER THAN THE OPPOSED SIDE FACES, (4) BEING MOUNTED SUBSTANTIALLY CENTRALLY THROUGH A FIRST OF THE OPPOSED SIDE FACES, (I) WITH ITS LEGS EXTENDING INWARDLY OF THE BLOCK BUT TERMINATING SHORT OF THE OTHER OPPOSED SIDE FACE, (II) WITH ONE OF ITS ENDS TERMINATING SHORT OF THE COLD FACE; (C) A BENDABLE L SHAPED MEMBER, (1) HAVING A PAIR OF STRAIGHT ARMS WHICH JOIN EACH OTHER AT APPROXIMATELY A 90* ANGLE ENCOMPASSING AN EDGE OF THE COLD FACE, (2) FABRICATED OF AN OXIDIZABLE METAL, (3) A FIRST ARM, (I) AT LEAST A PORTION OF WHICH IS MOUNTED ALONG THE FIRST OPPOSED SIDE FACE, (II) ONLY A PORTION OF WHICH IS RIGIDLY HELD IN POSITION BY THE END OF THE WEB OF THE CHANNEL-LIKE MEMBER WHICH TERMINATES SHORT OF THE COLD FACE, (4) THE OTHER ARM EXTENDING FROM THE FIRST OPPOSED SIDE FACE SUBSTANTIALLY CENTRALLY ACROSS THE COLD FACE, (I) BUT TERMINATING SHORT OF THE OTHER OPPOSED SIDE FACE, (II) BEING NARROWER THAN THE COLD FACE, (III) BEING EMBEDDED IN A DEPRESSION IN THE COLD FACE, (IV) ITS OUTER FACE LYING IN SUBSTANTIALLY THE SAME PLANE AS THE COLD FACE, (V) MEANS FORMED THEREIN FOR HANGING THE UNIT; (D) AT LEAST ONE GROOVE EXTENDING ACROSS THE COLD FACE, (1) PARALLEL TO AN EDGE OF THE L SHAPED MEMBER''S ARM WHICH IS EMBEDDED IN THE COLD FACE, (I) EXPOSING THAT EDGE.