Precautions for Using Ladles

When the ladle is used for the first time, all parts of the ladle must be thoroughly inspected. Parts such as gantry hooks, various protective devices, and safety forks should be inspected in particular detail. If damage is found, it should be replaced in time. The steel ladle must be inspected with 2 times the load during initial use.

Precautions for Using Ladles

Precautions Before Using the Ladle

Repair of ladle lining. Refractory materials, including refractory bricks, refractory mortar, and refractory mud, should be appropriately selected according to the type of molten steel. For example, ordinary carbon steel uses silicon refractory materials; ordinary alloy steel uses aluminum refractory materials; manganese steel uses magnesium refractory materials.

When using a plug-rod ladle, the ladle nozzle and refractory layer must be constructed in the following order.

(1) Install the sprue brick at the nozzle at the bottom of the package. The sprue brick should be paired with the plug brick and ground before installation.

(2) Install the seat brick.

(3) Use refractory bricks to build the bottom and walls of the ladle. The bottom part of the bag should be sloped 1/20 towards the water outlet. For the used package body, if the corrosion of the refractory layer is not large, you can only replace the refractory bricks at the nozzle and repair part of the refractory layer.

Refractory Bricks for Steel Ladle

(4) Before using the plug rod, the resistant material must be constructed in the following order. Insert the stopper rod through the ground stopper brick and secure it in place. Place the sleeve brick on the plug rod, and fill the space between the sleeve brick hole and the plug rod with dry fine sand or asbestos powder. The contact surfaces of plug head bricks and sleeve bricks should be coated with refractory mud. Add a pressure cap to the end of the sleeve brick, and use a nut to tighten the sleeve brick through the gland.

Installation of sliding spouts. First, install the sliding nozzle well bricks, and then build the refractory material according to the specified thickness of the refractory material.

Ladle baking

Install the plug rod filled with refractory material on the cross arm. During installation, the concentricity of the plug brick and the sprue brick must be adjusted to ensure sealing. After the adjustment is completed, use nuts to reliably fix the plug rod and the transverse hip.

After assembly, the newly repaired refractory ladle should be thoroughly baked 6 hours before use. The baking temperature should be gradually increased from low to high (800℃, constant temperature for 1 hour).

Lower the hanger while the ladle is baking. The drying bag can be used with gas or natural gas. The baking time of used ladles can be shortened. However, the baking time should not be less than 2 hours, and the baking temperature should not be lower than 800℃.

Precautions for Casting Use

1. Before casting, first check whether the safety fork is reliable.

2. Align the pouring opening of the pouring ladle with the opening of the pouring cup of the mold.

3. Before pouring, use the lever to press the plug rod and loosen the locking bolt at the same time to make the pouring ladle in the poured state. When pouring, slowly lift the plug rod, and the molten metal will flow out from the bottom nozzle. The greater the lifting distance of the stopper rod, the greater the flow rate of molten metal. Therefore, the pouring speed can be controlled using a lever.

4. After pouring, check whether the sprue bricks, plug bricks, and sleeve bricks at the nozzle are severely corroded, cracked, or otherwise damaged. If it is damaged, it should be replaced. If it is not damaged, the adhered metal residue or other adherents should be cleaned and maintained for use. Under normal circumstances, the sprue bricks, plug bricks, and sleeve bricks need to be replaced after one package of molten steel.

5. When using the sliding nozzle ladle, pay attention to the drainage sand in the nozzle. When pouring a casting, first open the sliding nozzle mechanism to release a portion of the molten steel (release the drainage sand). Prevent the drainage sand from rushing into the casting and affecting the quality of the casting.

After the ladle is used, the bad refractory materials should be removed and the refractory materials should be rebuilt. At the same time, inspect the pouring ladle, including hoists, lifting rings, beams, safety devices, stopper rods stopper rod driving devices, and sliding nozzle devices.

Relevant Instructions on Refractory Bricks Masonry

Regarding the problem of refractory brick masonry, there are many conventional steps, these steps generally cannot be ignored in the process of refractory brick masonry. Because this affects the working conditions of the entire thermal kiln. For example, refractory mortar is required to be coated on refractory bricks built on boilers. So, what kind of mortar is generally used for chimney refractory brick masonry? Is it possible to use ordinary masonry mortar? Questions and answers about refractory brick masonry, the following will be a good answer.

RS Refractory Bricks for Sale

Masonry of Refractory Bricks in Cement Kiln

Initially, when people used vertical kilns to burn cement clinker, due to the small size of the kiln and the low calcination temperature, only a single clay brick containing 30-40% Al2O3 was used. The initial rotary kiln was improved on this experience and used high alumina bricks and clay bricks. Since the 1960s, due to the large-scale and enhanced operation of the kiln, the high-temperature kiln lining has generally been constructed with alkaline bricks. The main varieties are magnesia chrome brick, spinel brick, and dolomite brick.

The Role of Refractory Brick Lining for Cement Kiln

• 1. Prevent direct damage to the kiln body caused by high-temperature flame or air current, and protect the kiln body.
• 2. Prevent the erosion of the kiln body by harmful substances (CO, SO2);
• 3. Prevent the corrosion of materials and airflow to the kiln body;
• 4. Reduce the temperature of the kiln body to prevent the kiln body from being oxidized and corroded;
• 5. It has the function of heat storage and heat preservation;
• 6. It can improve the performance of kiln hanging.

Requirements for Masonry Mortar of Refractory Bricks for Chimneys

What kind of mortar is generally used for chimney refractory brick masonry? First of all, we must choose according to the material of refractory bricks. The manufacturer will provide matching products when purchasing refractory bricks. For specific information, you can consult the refractory brick manufacturer. Refractory selection recommendations, relevant technical guidance, and provide samples. Refractory manufacturers http://www.aluminabricks.com/ generally provide a full range of refractory services.

Can ordinary masonry mortar be used for construction? It is not recommended, because ordinary masonry mortar does not have acid resistance and corrosion resistance, which will affect the service life of chimneys and refractory bricks. In addition, acid-resistant cement or refractory cement is generally used, and it is divided into one-component and two-component. Acid-resistant cement used in rare cases.

Refractory Bricks Lining for the Rotary Kiln

Refractory bricks masonry method

1. Refractory brick-flat laying method

The flat-laying method is mostly used for the furnace wall, and a few are used for the bottom layer of the furnace bottom. In our country, the most common method of flat laying is the "one smooth and one top" brick wall. Annular bricklaying (like the wall of a blast furnace) is also flat laid.

2. Refractory bricks-side laying method

The side-laying method is mainly used in two parts. One is to pave the bottom of the bricklayer, such as the bottom of the open hearth and heating furnace. The second is side arches, such as open-hearth tapping arches.

3. Refractory bricks-vertical laying method

Vertical masonry, also called vertical masonry, is mainly used in two parts. One is the uppermost layer of the furnace bottom, such as the open hearth and blast furnace bottom. The second is the working layer of the furnace bottom, such as the open hearth.

Take the straight standard brick as an example. When laying flat, its largest plane is placed in a horizontal position. When laying on the side, the side (also called the middle, 230x65 mm) is placed in a horizontal position. When laying vertically, the small face is placed in a horizontal position.

Precautions for the Masonry of Refractory Bricks

The top of the refractory brick lining should be fully attached to the surface of the cylinder, and no cracks should be left. Thorough contact should be made between the large surfaces of adjacent single bricks. The width of the polished refractory brick shall not be less than 50% of the original brick, and the thickness shall not be less than 80% of the original brick. Iron hammers cannot be used during construction. Prevent the following phenomena from refractory bricks: inverted heads and sizes, lottery, mixing, dislocation, inclination, uneven ash joints. Climbing, de-centering, re-stitching, mouth opening, voiding, hairy seam, snaking, brick bulging, missing edges, few corners, etc. http://www.aluminabricks.com/refractory-related-products/refractory-mortar-for-sale/.