Method for preparing industrial silicon carbon reducing agent through coordination of biomass charcoal and activated petroleum coke

A technology for biomass charcoal and biomass raw materials, which is applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of occupying storage space and destruction, achieve high reaction activity, reduce production costs, and improve silica reduction. rate effect

Inactive Publication Date: 2017-05-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Biomass is a kind of agricultural by-product, most of which are incinerated or piled up for decay, incineration will produce a

Method used

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  • Method for preparing industrial silicon carbon reducing agent through coordination of biomass charcoal and activated petroleum coke

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Effect test

Embodiment 1

[0031] Embodiment 1: as figure 1 Shown, a kind of method that biochar synergistically activates petroleum coke to prepare industrial silicon carbonaceous reductant, concrete steps are as follows:

[0032] (1) Dry and crush biomass mixed raw materials such as rice husks, walnut shells, and corn stalks until the particle size is less than 30mm. Under the conditions of temperature 80°C and pressure 50MPa, hot pre-press molding, in which there is one in the middle of the profile A through hole with a diameter of 30mm;

[0033] (2) Under the condition of a heating rate of 5°C / min, heat the profile obtained in step (1) to 250°C and carry out carbonization treatment for 240 minutes. Thoroughly; cool to room temperature, crush until the particle size is not greater than 0.2mm to obtain biochar, the mass percentage of biochar components is 75% fixed carbon, 15% volatile matter, 3% moisture, and less than 4% ash; The specific resistance is 5500µΩ m;

[0034] (3) Dry the petroleum cok...

Embodiment 2

[0037] Embodiment 2: as figure 1 Shown, a kind of method that biochar synergistically activates petroleum coke to prepare industrial silicon carbonaceous reductant, concrete steps are as follows:

[0038] (1) Dry and crush biomass mixed raw materials such as pine nut shells, millet stalks, and corn stalks until the particle size is less than 28mm, and heat pre-press them into profiles at a temperature of 90°C and a pressure of 40MPa, in which there are 2 diameters in the middle of the profile 10mm through hole;

[0039] (2) Under the condition of a heating rate of 10°C / min, heat the profile obtained in step (1) to 500°C and carry out carbonization treatment for 200 minutes. Thoroughly; cooled to room temperature, crushed until the particle size is not greater than 0.2mm to obtain biochar, the mass percentage of biochar components is 80% fixed carbon, 13% volatile matter, 3% moisture, and less than 0.4% ash; The specific resistance is 5200µΩ m;

[0040] (3) Dry the petroleum...

Embodiment 3

[0043] Embodiment 3: as figure 1 Shown, a kind of method that biochar synergistically activates petroleum coke to prepare industrial silicon carbonaceous reductant, concrete steps are as follows:

[0044](1) Dry and crush biomass mixed raw materials such as bagasse, corncobs and wheat straws until the particle size is less than 25mm, and heat pre-press them into profiles at a temperature of 100°C and a pressure of 30MPa, in which there are 2 diameters in the middle of the profiles 20mm through hole;

[0045] (2) Under the condition of a heating rate of 15°C / min, heat the profile obtained in step (1) to 600°C and carry out carbonization treatment for 180 minutes. Thoroughly; cool to room temperature, crush until the particle size is not greater than 0.2mm to obtain biochar, the mass percentage of biochar components is 65% fixed carbon, 20% volatile matter, 8% moisture, and less than 3% ash; The specific resistance is 6000µΩ m;

[0046] (3) Dry the petroleum coke, and the cru...

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Abstract

The invention relates to a method for preparing an industrial silicon carbon reducing agent through coordination of biomass charcoal and activated petroleum coke and belongs to the technical field of non-ferrous metal metallurgy. The method comprises the steps of drying and crushing a biomass material, carrying out hot pressing to form a profile, carrying out heating and carbonizing treatment, cooling and crushing the profile to obtain the biomass charcoal; and drying and crushing petroleum coke; and mixing the biomass charcoal with the petroleum coke evenly and carrying out hot pressing to form a pellet to obtain the industrial silicon carbon reducing agent. The industrial silicon carbon reducing agent prepared by the method has the characteristics of being high in specific resistance and high in reaction activity; the silica reduction rate can be improved by 5-10%; unit consumption of the reducing agent is reduced; use of charcoal or a wood block is reduced; and a serious ecological problem caused by substantial deforestation is solved.

Description

technical field [0001] The invention relates to a method for synergistically activating petroleum coke with biomass charcoal to prepare an industrial silicon-carbon reducing agent, belonging to the technical field of nonferrous metal smelting. Background technique [0002] Due to its high fixed carbon content, low volatile matter content and high combustion calorific value, petroleum coke is widely used in composite carbonaceous reducing agents for industrial silicon smelting (mass ratio is above 30%). Among them, its higher fixed carbon is the main reducing agent involved in the carbothermic reduction of silica. But petroleum coke, a major by-product of the petroleum refining process, is a carbon material with a graphite-like structure. Industrial silicon smelting is carried out in high-temperature electric furnaces, and electric arc smelting requires high specific resistance for raw materials, especially carbonaceous raw materials, so as to ensure the insertion depth of e...

Claims

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Application Information

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IPC IPC(8): C01B33/025
CPCC01B33/025C01P2006/80
Inventor 马文会陈正杰魏奎先伍继君李绍元雷云于洁杨斌戴永年
Owner KUNMING UNIV OF SCI & TECH
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