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Method for modifying petroleum coke, modified petroleum coke obtained therefrom, carbonaceous reducing agent and smelting method for industrial silicon

A technology of petroleum coke and modifier, which is applied in the field of carbonaceous reducing agent, smelting of industrial silicon, and modified petroleum coke. It can solve the problems that the reactivity of petroleum coke needs to be improved, so as to protect forest resources and ecological environment and reduce production. The effect of high cost and productivity

Active Publication Date: 2021-01-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reactivity of petroleum coke in the reducing agent needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Petroleum coke with a volatile content of 8.9% by weight and an ash content of 0.29% by weight and petroleum pitch with an ash content of 0.06% by weight were heated at 105°C and stirred at 100rpm to make them evenly mixed, wherein the petroleum coke and petroleum The weight ratio of the asphalt was 4:1, and then the mixture was dried at 150° C. for 2 hours and shaped to obtain a modified petroleum coke A with a volatile content of 14.2% by weight and an ash content of 0.25% by weight.

[0045] The reactivity of the unmodified petroleum coke and the obtained modified petroleum coke A were measured respectively, and the results were 60% and 78%, respectively. That is, the petroleum coke is modified by the method of this example, the volatile content of the modified petroleum coke is increased by 5.3% by weight, and the reactivity is increased by 18%, which can better meet the requirements of industrial silicon-carbon reducing agents .

Embodiment 2

[0047] The petroleum coke with a volatile content of 8.9% by weight and an ash content of 0.29% by weight and a catalytic cracking oil slurry with an ash content of 0.24% by weight were heated at 80°C and stirred at 100rpm to make them evenly mixed, wherein the petroleum coke The weight ratio to the catalytic cracking oil slurry was 1:1, and then the mixture was dried at 100°C for 4 hours and shaped to obtain modified petroleum coke B with a volatile content of 14.8% by weight and an ash content of 0.27% by weight.

[0048] The reactivity of the unmodified petroleum coke and the obtained modified petroleum coke B were measured respectively, and the results were 60% and 82%, respectively. That is, the petroleum coke is modified by the method of this example, the volatile content of the modified petroleum coke is increased by 5.9% by weight, and the reactivity is increased by 22%, which can better meet the requirements of industrial silicon-carbon reducing agents .

Embodiment 3

[0050] Heat petroleum coke with a volatile content of 9.1% by weight and an ash content of 0.21% by weight and a modifier with an ash content of 0.12% by weight at 95°C and stir at 100rpm to make them evenly mixed, wherein the modifier It is a mixture of petroleum asphalt and ethylene tar, the weight ratio of petroleum asphalt and ethylene tar is 3:1, and the weight ratio of petroleum coke to modifier is 10:1, and then the mixture is dried at 180°C for 1 hour and shaped to obtain Modified petroleum coke C with a volatile content of 14.5% by weight and an ash content of 0.20% by weight.

[0051] The reactivity of the unmodified petroleum coke and the obtained modified petroleum coke C were measured respectively, and the results were 62% and 84%, respectively. That is, the petroleum coke is modified by the method of this example, the volatile content of the modified petroleum coke is increased by 5.4% by weight, and the reactivity is increased by 22%, which can better meet the r...

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Abstract

The invention relates to the technical field of industrial silicon smelting and new energy, and discloses a modification method for petroleum coke and modified petroleum coke obtained by the same, a carbonaceous reducing agent, and a smelting method for industrial silicon. The modification method includes the following steps: a modifier is mixed with the petroleum coke, and then a mixture is subjected to drying and molding, wherein the modifier is asphalt and / or heavy oil. The modified petroleum coke obtained by the modification method of the invention can replace charcoal as a component of the carbonaceous reducing agent of the industrial silicon, and so, the deficiency can be solved that the reaction reactivity is low and a volatile matter is low when the petroleum coke is utilized as the component of the carbonaceous reducing agent used for the industrial silicon smelting, and the adaptability is improved.

Description

technical field [0001] The invention relates to the technical fields of industrial silicon smelting and new energy, in particular to a method for modifying petroleum coke, the modified petroleum coke obtained therefrom, a carbonaceous reducing agent and a method for smelting industrial silicon. Background technique [0002] Charcoal and coal washing are currently the commonly used carbonaceous reducing agents in the industrial silicon industry. Charcoal technology and coal washing oil coke technology are the mainstream processes for industrial silicon production. Due to the dependence of charcoal on forest resources, it seriously damages the ecological environment. With the strengthening of the protection awareness of forest resources, the supply of charcoal is becoming increasingly tense, and it has become a trend to reduce the amount of charcoal used. Therefore, it is necessary to find a new type of carbonaceous reducing agent suitable for industrial silicon smelting, so a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/025
CPCC01B33/025C01P2006/80
Inventor 范启明申海平刘自宾阎龙
Owner CHINA PETROLEUM & CHEM CORP
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