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Carburant and preparation method thereof

A technology of recarburizer and adhesive, which is applied in the field of graphite recarburizer and its preparation, can solve the problems that the product quality cannot meet the requirements of high-end equipment and castings, the product quality is not high, and the utilization rate of raw materials is high, so as to solve the problem of graphite tailing The effect of low material utilization rate, high fixed carbon content and low production cost

Inactive Publication Date: 2016-05-04
NINGXIA KOCEL ENERGY CO LTD
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Problems solved by technology

However, there is a problem that the process is relatively complicated, involving the adjustment of the specific gravity of carbon solid particles, deoxidation and impurity removal, and multiple processes of particle breaking and classification. At the same time, there are interface and melting in the molten steel refining process, as well as inert atmosphere protection in the oxidation prevention process.
[0008] It can be seen that there are manufacturers in China that can produce high-fixed carbon-content recarburizers. Although graphite tailings from lithium-ion batteries are used to produce recarburizers, there are problems with low product quality, complex processes, long production cycles, or raw material utilization. High and low environmental pollution, but the product quality cannot meet the contradictions of high-end equipment and casting requirements

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  • Carburant and preparation method thereof
  • Carburant and preparation method thereof

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preparation example Construction

[0038] The preparation method of carburant of the present invention comprises the following steps:

[0039] 1. Mix the micronized graphite and the electrode powder evenly according to the ratio of mass parts 41-65:40-65 to obtain the mixed graphite material. Use a three-dimensional mixer or a conical mixer with a mixing speed of 200-1000rpm and a mixing time of It is 0.1~10.0h.

[0040] Micropowder graphite is the graphite tailings produced during the processing of lithium-ion battery negative electrode graphite materials. More than one type of ball MCMB.

[0041] The mass carbon content of the micropowder graphite is 96.0-99.0%, the moisture content is 0.05-0.25%, the ash content is 0.15-1.60%, the volatile matter content is 0.79-2.10%, and the sulfur content is 0.01-0.05%. The particle size does not exceed 74.0 μm.

[0042] The electrode powder is the powder material of waste graphite electrode, and the waste graphite electrode is more than one of the graphite electrode r...

Embodiment 1

[0061] One, take by weighing 55Kg of natural flaky graphite tailings, 50Kg of the powder material of the graphite electrode reclaimed by the electric furnace for casting, the mass ratio is 55:50, join in the three-dimensional mixer for processing, the rotating speed is 200rpm, and the mixing time is 0.1h, to obtain Graphite material. The content test results of micronized graphite and electrode powder are shown in Table 1 and Table 2.

[0062] 2. Compact the graphite material and place it in a box-type atmosphere resistance furnace. In a nitrogen atmosphere with a purity of 99.9%, the temperature is raised from room temperature to 2300°C at a heating rate of 5°C / min, and the temperature is naturally lowered to After taking it out at room temperature, pass through a 200-mesh vibrating sieve to obtain graphite raw materials with an average particle size of 18.8 μm.

[0063] 3. Blend orthosilicic acid and sodium silicate according to the mass percentage of 10%:90%, weigh 3Kg of ...

Embodiment 2

[0071] 1. Weigh 65Kg of artificial graphite tailings made from petroleum needle coke and 40Kg of powder material of waste graphite electrodes recovered from electrolytic aluminum, with a mass ratio of 65:40, and add them to a conical mixer for processing at a speed of 1000rpm. For 10h, graphite material was obtained. The content test results of micronized graphite and electrode powder are shown in Table 1 and Table 2.

[0072] 2. Compact the graphite material and place it in a box-type atmosphere resistance furnace. In an argon atmosphere with a purity of 99.999%, the temperature is raised from room temperature to 2800°C at a heating rate of 30°C / min, and the temperature is naturally lowered to After taking it out at room temperature, pass through a 200-mesh vibrating sieve to obtain graphite raw materials with an average particle size of 20.5 μm.

[0073]3. Blend sodium silicate and potassium silicate according to the mass percentage of 20%:80%, weigh 3.5Kg of the blend of s...

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Abstract

The invention discloses a carburant and a preparation method thereof, and the technical problem to be solved is to improve the quality of the carburant. The carburant is composed of a graphite material and a bonding agent, wherein the graphite material is obtained by mixing micro-powder graphite and electrode powder, and the bonding agent is composed of an inorganic bonding agent and an organic bonding agent. The preparation method for the carburant comprises the following steps: uniformly mixing the micro-powder graphite with the electrode powder to obtain a mixture; carrying out thermal treatment on the mixture; mixing the inorganic bonding agent with the organic bonding agent; and adding the bonding agent into the graphite raw material to carry out pelletizing, thereby obtaining the carburant. Compared with the prior art, the fixed carbon content of the carburant is high, and the carburant is high in volumetric absorption capacity with iron parts and steel parts in a molten iron casting process, so that the quality of castings is improved, and the problems that the steel parts are easily cracked as a result of poor anti-impact toughness and low cracking energy absorption due to the fact that local stress concentration is caused by a great number of pores and crazes generated on the surfaces of the castings are overcome. The carburant prepared by the preparation method is high in pelletizing and molding ratio, and is low in production cost.

Description

technical field [0001] The invention relates to a recarburizer for casting and a preparation method thereof, in particular to a graphite recarburizer and a preparation method thereof. Background technique [0002] During the casting process, it is necessary to increase the carbon content of molten iron to meet the requirements of fixed carbon content for iron materials of different specifications, which is mainly achieved by adding a carburant. Currently commercially available recarburizers include pig iron, pitch coke recarburizers, graphite electrode recarburizers, petroleum coke recarburizers, coal-based recarburizers, artificial graphite recarburizers, etc. needs improvement. The price of pig iron is higher, and the sulfur content and silicon content are higher, and the carbon absorption rate is low. Petroleum coke, pitch coke and other recarburizers calcined by fossil fuels contain impurities that are difficult to remove, and the structure is too compact, resulting in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00
CPCC21C7/0025Y02P10/20
Inventor 张潇许翔惠国栋马斌悍张勇
Owner NINGXIA KOCEL ENERGY CO LTD
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