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Method for deeply deashing cock

A coke and depth technology, which is applied in the field of coke deep deashing, can solve the problem that there is no good method for deashing finished coke, and achieve the effect of high added value, low energy consumption and easy operation

Inactive Publication Date: 2010-07-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of coke deashing focuses on coal washing before coking, but there has been no good method for deashing finished coke.

Method used

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  • Method for deeply deashing cock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Raw materials:

[0046] The raw material is high-ash coke powder produced during screening in a coking plant, which is crushed to a particle size of less than 2mm. Its composition is shown in Table 1

[0047] Table 1 raw material composition list

[0048]

[0049] (2) Experimental conditions

[0050] ① Alkaline leaching conditions: the mass concentration of sodium hydroxide aqueous solution is 15%, the liquid-solid ratio is 6:1, the temperature is 110°C, the pressure is 0.8MPa, and the leaching time is 40min.

[0051] ②Acid leaching conditions: the mass concentration of sulfuric acid aqueous solution is 12%, the liquid-solid ratio is 6:1, the temperature is 80°C, and the leaching time is 30 minutes.

[0052] (3) Experimental results:

[0053] Under certain conditions, experiments are carried out to obtain alkali leaching slurry, and the slurry is filtered to obtain primary leaching intermediate product coke powder and alkali leaching solution. After the coke...

Embodiment 2

[0057] (1) Raw materials:

[0058] The raw material is diced coke with a particle size of about 5 cm produced during crushing in a coking plant, which is crushed to a particle size of less than 2 mm. Its composition is shown in Table 3.

[0059] Table 3 raw material composition table

[0060]

[0061] (2) Experimental conditions

[0062] ①Alkaline leaching conditions: The mass concentration of sodium hydroxide aqueous solution is 10%, the liquid-solid ratio is 3:1, the temperature is 150°C, the pressure is 1.0MPa, and the leaching time is 30min.

[0063] ②Acid leaching conditions: the mass concentration of sulfuric acid aqueous solution is 8%, the liquid-solid ratio is 3:1, the temperature is 70°C, and the leaching time is 20 minutes.

[0064] (3) Experimental results:

[0065] Under certain conditions, experiments are carried out to obtain alkali leaching slurry, and the slurry is filtered to obtain primary leaching intermediate product coke powder and alkali leaching ...

Embodiment 3

[0069] (1) Raw materials:

[0070] The raw material is high-ash bituminous coal from a coal mine in a certain place, which is crushed to a particle size of less than 2mm. Its composition is shown in Table 5.

[0071] Table 5 Raw material composition list

[0072]

[0073] (2) Experimental conditions

[0074] ①Alkaline leaching conditions: The mass concentration of sodium hydroxide aqueous solution is 10%, the liquid-solid ratio is 6:1, the temperature is 180°C, the pressure is 1.4MPa, and the leaching time is 1h.

[0075] ②Acid leaching conditions: the mass concentration of sulfuric acid aqueous solution is 10%, the liquid-solid ratio is 2:1, the temperature is 80°C, and the leaching time is 30 minutes.

[0076] (3) Experimental results:

[0077] Under certain conditions, experiments are carried out to obtain alkali leaching slurry, which is filtered to obtain primary leaching intermediate product coal powder and alkali leaching solution. After the coal powder is washe...

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Abstract

The invention discloses a method for deeply deashing cock, which includes the following steps that: cock is crushed, so that the ash impurity in the cock can be fully exposed; the crushed cock powder and aqueous sodium hydroxide solution are added in a high-pressure kettle and heated to react, so that part of the ash can be removed; the liquid and the solid of leaching slurry are separated, so that intermediate products leached in one step, i.e. cock powder and alkali leaching solution, are obtained; the intermediate product, the cock powder, is washed by water and naturally aired, and the next step, normal-pressure acid pickling, is carried out. The liquid and the solid of leaching slurry are separated, so that products, i.e. cock powder and acid leaching solution, are obtained. The obtained low-ash cock powder can be directly used as product or agglomerated according to production requirements. After the alkali leaching solution and the acid leaching solution are recycled for multiple times, the solution concentrate is reduced, the impurity concentration is increased, the leaching effect becomes poor, and thereby the alkali leaching solution and the acid leaching solution can be stored as leaching waste solutions. The acid waste solution and the alkali waste solution can be neutralized by each other, so that the waste solution treatment cost is reduced.

Description

technical field [0001] The invention relates to a treatment method for carbonaceous materials, in particular to a treatment method for coke deep deashing. Background technique [0002] China is the largest producer, consumer and exporter of coke in the world today. China's current coke production accounts for more than half of the global production, and exports account for nearly 60% of the global trade volume. Coke is mainly used in blast furnace ironmaking and blast furnace smelting of non-ferrous metals such as copper, lead, zinc, titanium, antimony, mercury, etc., and acts as a reducing agent, heating agent and material column skeleton. In addition, coke is also used in foundry, chemical industry, calcium carbide and ferroalloy industries. Different industries have different quality requirements for coke, but in general, the lower the ash content in coke and the higher the fixed carbon content, the more beneficial it is for industrial production. The ash content in co...

Claims

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Application Information

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IPC IPC(8): C01B31/02C10L9/02C10L5/00
Inventor 谢克强马文会宁哲杨扬周阳伍继君秦博杨斌刘大春魏奎先戴永年
Owner KUNMING UNIV OF SCI & TECH
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