Method for increasing carbon yield

Abstract

The invention relates to a method for increasing the carbon yield. The method comprises the steps that S1, the granularity of coke for steelmaking recarburization is set to be 3-7 mm; s2, the coke is fed in bulk through a belt, and the coke is fed through a steel plant raw material low-position stock bin and distributed to all steel-making furnace bases. According to the invention, on the premise of ensuring the variety quality, by optimizing the granularity of the coke particles and the feeding mode of the coke particles, the carbon yield can be effectively improved, and the material adding accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of iron and steel metallurgy, and in particular to a method for increasing carbon yield. Background Art

[0002] The New Area of ​​Beiying Steel Plant uses coke particles with a size of 1-3mm to increase carbon in steelmaking, and the addition is done manually. This results in high labor intensity, poor material input accuracy, and difficulty in collecting and counting consumption data. It also easily leads to material waste. Currently, the materials are supplied in small bags packaged in ton bags, with a packaging cost of 65 yuan per bag (each bag of coke particles weighs 0.6 tons). The material cost is high and the product efficiency is low. Summary of the Invention

[0003] In view of the above problems, the purpose of the present invention is to provide a method for increasing carbon yield, which effectively improves carbon yield by optimizing the particle size of coke particles and the feeding method of coke particles while ensuring the quality of the product.

[0004] The technical solution adopted in the present invention is as follows: The present invention provides a method for increasing carbon yield, which specifically comprises the following steps: S1. Set the coke particle size for steelmaking and carbonization to 3-7 mm; S2. Coke is loaded in bulk via belt conveyor. It is loaded into the steel plant's low-level raw material silo and distributed to each steelmaking furnace.

[0005] Compared with the prior art, the present invention has the following beneficial effects: The method proposed in this paper increases the coke pellet recovery rate in the LF furnace area of ​​a steel plant by approximately 25%, reducing the unstable carbon recovery rate caused by inaccurate manual feeding in the LF furnace area. By eliminating the need for bulk bag and internal small bag packaging for the coke pellets, the packaging cost of the coke pellets can be reduced by approximately 108.3 yuan per ton, effectively reducing the workload of on-site operators and improving product yield and pass rate. DETAILED DESCRIPTION

[0006] The present invention provides a method for increasing carbon yield, which specifically comprises the following steps: S1. Set the coke particle size for steelmaking and carbonization to 3-7 mm; S2. Coke is loaded in bulk via a belt conveyor. It is loaded through the steelmaking plant's low-level raw material silo and distributed to each steelmaking furnace. The material is transported from the low-level silo to the converter's high-level silo via a loading conveyor belt. Operators accurately and precisely vibrate the material based on the steel grade and composition range. From the high-level silo, the material is fed through a discharging system and added to the molten steel, completely eliminating the need for manual small-scale packaging for ladle loading and carbon content adjustment.

[0007] Accurate material addition, precise data, and data collection and statistics are entered into the system to avoid errors caused by manual entry.

[0008] Through practical application, the present invention has found that the existing small coke particle size of 1-3 mm is easily burned and the yield is reduced. Moreover, manual addition is affected by insufficient feeding precision, and some of it is added to the slag surface, further affecting the yield. Furthermore, the small particle size also affects the efficiency of belt feeding. Experiments have shown that increasing the coke particle size to 3-7 mm not only facilitates transportation to the converter's high-level silo via the feeding belt, but also reduces burnout and improves the yield. However, when the coke particle size exceeds 7 mm, it becomes difficult to melt in the molten steel, which is not conducive to the subsequent carbon adjustment and control of the molten steel.

[0009] Matters not described in detail in this invention are all known technologies.

[0010] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A method for increasing carbon yield, characterized in that: The method comprises the following steps: S1. Set the coke particle size for steelmaking and carbonization to 3-7 mm; S2. Coke is loaded in bulk via belt conveyor. It is loaded into the steel plant's low-level raw material silo and distributed to each steelmaking furnace.