Ferrochrome casting machine

Abstract

The invention discloses a chromium-iron alloy casting machine, which comprises a conveyor, a tundish, a thermal insulation pouring chute, a casting mold, a water cooling pool, a finished material receiving tank and a spraying mechanism. The ferrochrome alloy casting machine of the present invention can continuously complete a series of work such as pouring, cooling, demolding and collecting of ferrochrome alloy melt at one time, improves the labor productivity of ferrochrome alloy casting and molding, and makes the particle size failure rate of ferrochrome alloy products less than 1 %, compared with manual crushing, the production cost of ferrochromium per ton is reduced by about 220 yuan. The ferrochromium alloy product produced by the invention has uniform particle size, uniform composition and less inclusion content. The chrome-iron alloy casting machine of the present invention has high operation rate, little mold damage, and continuous operation rate reaches 92%. Compared with the water spray type ferroalloy casting machine, the water consumption of the ferrochrome alloy casting machine is reduced by about 5% during operation.

Description

technical field [0001] The invention relates to the field of ferroalloy smelting, in particular to a ferrochrome alloy casting machine. Background technique [0002] As the main alloying agent for iron and steel metallurgy, especially for stainless steel smelting, ferrochromium alloy generally requires a particle size of 10-100 mm, and the more uniform the particle size, the more beneficial it is for the batching and other operations in the alloying process of steelmaking. At present, the method of die casting-manual crushing or mechanical crushing is still widely used in China to obtain ferrochrome alloy blocks that meet the particle size requirements. The main problems of using this method are: the pulverization rate after crushing is high, the metal loss rate is large, resulting in a substantial increase in production costs, especially manual crushing needs to increase labor costs, and labor productivity is low; after casting ingots, Long cooling time will easily lead to...

AI Technical Summary

Problems solved by technology

The main problems of using this method are: the pulverization rate after crushing is high, the metal loss rate is large, resulting in a substantial increase in production costs, especially manual crushing needs to increase labor costs, and labor productivity is low; after casting ingots, Long cooling time will easily lead to segregation of ferrochrome alloy

[0003] In the prior art, the inclined conveyor is used, and the cooling time of the mold is relatively short. There is a risk that the mold will still solidify before it touches the ferroalloy melt after spraying the grout. If there is liquid slurry in the mold, the slurry will vaporize rapidly during pouring. , and cannot be discharged in time to cause gas expansion, resulting in cracks in the mold, resulting in difficulty in demolding the alloy after casting

Unlike other ferroalloys, such as ferronickel or ferrosilicon, ferrochrome alloys have low superheat and poor fluidity at low temperatures. Therefore, if only heat preservation chutes are used, smooth casting may not be guaranteed, and there is a risk of condensation

The mold of the prior art adopts a tapered groove mold, which has the risk of difficult demoulding, so the vibration device is added in this technology, which makes the setting of the casting machine device complicated

The water-cooling mechanism is used to water-cool ferroalloy products. The structure of the mechanism is complex, and some alloys cannot be sprayed with water, and there are risks such as water waste caused by cooling water splashing.

Images