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Method for producing graphite carburant

A production method and technology of recarburizer, which is applied in the production field of graphite recarburizer, can solve the problems that coarse graphite should not be eliminated, reduce the strength of cast iron, and increase the shrinkage tendency, so as to prevent secondary pollution, stable performance, The effect of high utilization

Inactive Publication Date: 2020-04-17
马鞍山市弘信冶金材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In traditional smelting, a large proportion of pig iron is often added. Compared with the high scrap steel content of the same composition, its mechanical properties are half a grade lower. At the same time, there are many coarse eutectic graphites in pig iron. This coarse graphite has Inheritance, the melting temperature is low, and the coarse graphite should not be eliminated. The coarse graphite is inherited from the liquid state to the solid cast iron structure. On the one hand, it reduces the strength that the cast iron can achieve and reduces the performance of the material. The expansion effect of the resulting graphitized precipitation is weakened, which increases the shrinkage tendency of the molten iron during solidification

Method used

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  • Method for producing graphite carburant

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Effect test

Embodiment 1

[0028] A production method of a graphite-based recarburizer. The graphite mixture waste is mixed and crushed by an all-in-one machine equipment until the particle size is 80-120 μm, and then a binder with a mass of 2% of the graphite mixture waste is added, wherein the binder is It is obtained by mixing industrial starch and cellulose, and a water atomization device is installed at the outlet of the equipment. The amount of atomized water added is 20% of the mass of the graphite mixture waste. After all are mixed, use magnetic separation to reduce impurities containing iron and magnetic materials. , and then sent to the granulator for granulation, the diameter of the particles is controlled to be 4-6mm, and the length is 10-15mm. The obtained granules are sent to the dryer for drying through the auxiliary conveyor belt. After 0.5-1.5 hours, the graphite recarburizer is finally packaged.

[0029] Among them, graphite mixture waste is the cuttings of graphite electrodes produced...

Embodiment 2

[0032] A production method of a graphite recarburizer. The graphite mixture waste is mixed and crushed through an integrated machine equipment until the particle size is 5-80 μm, and then sodium carboxymethyl cellulose with a mass of 2.5% of the graphite mixture waste is added to the equipment. A water atomization device is installed at the outlet, and the amount of atomized water added is 15% of the mass of the graphite mixture waste. After all are mixed, magnetic separation is used to reduce iron-containing impurities, and then sent to a granulator for granulation, and the particle diameter is controlled to be 1-4mm. , the length is 1-10mm, and the obtained granules are sent to the dryer for drying through the auxiliary conveyor belt. The drying temperature is controlled at 130°C, and the drying time is controlled at 0.5-1 hour. Finally, the graphite recarburizer is packaged.

[0033] Among them, graphite mixture waste is the cuttings of graphite electrodes produced by carbon...

Embodiment 3

[0036] A production method of a graphite-based recarburizer. The graphite mixture waste is mixed and crushed by an all-in-one machine equipment until the particle size is 120-200 μm, and then 3% industrial starch of the graphite mixture waste is added, and water is set at the outlet of the equipment The atomization device, the amount of atomized water added is 30% of the mass of the graphite mixture waste, and after all the mixture is evenly mixed, the iron-containing impurities are reduced by magnetic separation, and then sent to the granulator for granulation, and the particle diameter is controlled to be 6-8mm and the length is 15mm. -25mm, the obtained granules are sent to the dryer for drying through the auxiliary conveyor belt, the drying temperature is controlled at 150°C, and the drying time is controlled at 0.5-1 hour, and finally packaged to obtain the graphite recarburizer.

[0037] Among them, graphite mixture waste is the cuttings of graphite electrodes produced by...

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Abstract

The invention discloses a method for producing a graphite carburant. After graphite mixture waste is mix-rolled and smashed, an adhesive is added, and uniform mixing is carried out; after water is added and uniform mixing is carried out, the formed mixture is conveyed into a pelletizer by a conveying belt, a magnetic head is arranged at the tail end of the conveying belt, and iron and magnetic material impurities are removed through magnetic separation; and grains obtained through the pelletizer are dried and packaged, and the graphite carburant is obtained. According to the method, the product is not metal, no residue exists in the iron smelting and casting use process, the utilization rate is high, and production use is convenient; the phosphorus and sulphur content is far lower than that of pig iron, the performance is stable, the production process of the graphite carburant is optimized and improved, and low energy consumption and low pollution are achieved through a pure physicalprocess; the graphite mixture waste is deeply processed into the graphite carburant, graphite byproducts or tailings and waste of industrial enterprises are fully utilized as raw materials, and secondary utilization of resources is achieved; and meanwhile, the production cost is reduced, and the graphite byproducts or tailings and waste have certain economic value and social benefits when converted into industrial production.

Description

technical field [0001] The invention belongs to the technical field of graphite materials, in particular to a production method of a graphite recarburizer. Background technique [0002] In traditional smelting, a large proportion of pig iron is often added. Compared with the high scrap steel content of the same composition, its mechanical properties are half a grade lower. At the same time, there are many coarse eutectic graphites in pig iron. This coarse graphite has Inheritance, the melting temperature is low, and the coarse graphite should not be eliminated. The coarse graphite is inherited from the liquid state to the solid cast iron structure. On the one hand, it reduces the strength that the cast iron can achieve and reduces the performance of the material. The expansion effect of the resulting graphitized precipitation is weakened, which increases the shrinkage tendency of the molten iron during solidification. [0003] Graphite recarburizer is a substance formed by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C7/06
CPCC21C7/0025C21C7/06Y02P10/20
Inventor 王浩王永李灿华徐文珍
Owner 马鞍山市弘信冶金材料有限公司