Slag ladle casting method and casting mold

Abstract

The invention discloses a casting method of a slag ladle and a dedicated casting mold for implementing the method. The method comprises the following technical steps: 1. manufacturing the casting mold: (1) designing a pit: designing and manufacturing a casting pit; (2) manufacturing a casting external mold of the slag ladle and a pouring gate system, preparing an external wall cold mold (11) of the slag ladle, connecting the pouring gate system well, and filling an outer sand mold (12); (3) manufacturing a casting inner mold of the slag ladle and a feed head mold, manufacturing an inner wall cold mold (21) of the slag ladle, installing the inner wall cold mold (21) of the slag ladle in the outer wall cold mold (11) of the slag ladle, and defining a slag ladle casting cavity (13) between the inner wall cold mold and the outer wall cold mold, wherein the outer wall cold mold (11) of the slag ladle and the inner wall cold mold (21) of the slag ladle are both made of iron; (4) drying of the mold: drying the mold with hot air till dry; 2. pouring: pouring the casting liquid in the slag ladle casting cavity (13), cooling, and at last obtaining the slag ladle.

Description

technical field [0001] The invention relates to a manufacturing method of smelting slag processing equipment and special manufacturing equipment, in particular to a slag ladle casting method and a casting mold. Background technique [0002] The slag ladle is an important bearing and transfer part of copper smelting equipment, and its quality is related to the safety of copper slag loading and transportation. The working conditions of the slag ladle are quite bad, the temperature of the slag is 1200 degrees, and sometimes there is matte, which will damage the slag ladle. For example, if the copper output reaches 300,000 tons, the daily slag transport volume is expected to reach 2,560 tons. After the slag package is transported to the slow cooling field by a flatbed truck, it will be unloaded into the cooling field by a tank truck. First, it will be cooled naturally for 12 hours, and then sprayed with water for 48 hours. Hours, after the slag is solidified as a whole, it is p...

AI Technical Summary

Problems solved by technology

According to the feeding analysis, the traditional process scheme needs to set the casting liner at the lower part of the riser, which increases the weight of the casting and increases the gross-to-net ratio of the casting. The yield rate of the casting process can only be maintained between 80-84%.

[0025] 3. The surface quality of castings is average

The height of the traditional riser is relatively high, which increases the hydraulic pressure of the steel. In the case of the same strength of the sand mold, the casting is prone to sand sticking defects

Without the use of special cold molds, sand inclusions are prone to occur on the surface of the slag ladle, which has a great impact on the surface quality of castings and increases the cost of surface treatment in the later stages of casting life

[0026] 4. The traditional slag ladle casting scheme has no special cold mold tooling and can only be chilled by local external chillers. Under the condition of ensuring the local quality of castings, it cannot meet the overall internal quality of castings

During the use of the slag bag, there are still quality risks, and the service life of the slag bag is relatively shorter

[0027] 5. It is complicated to operate the shape buckle box

During the pouring process, due to the low strength of the sand mold, the sand blocks on the inner wall of the cavity will fall, resulting in the phenomenon of lack of meat or swelling on the surface of the casting, which affects the size of the casting. In severe cases, the molten steel may even be underfilled, resulting in the scrapping of the casting

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