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Coal Coking Processing Wastewater:

Coking - an overview ScienceDirect Topics

DELAYED COKING PROCESS. Description: Delayed coking process is a thermal process which increases the molecular aggregation or association in petroleum-based residues or coal tar pitches leading to extended mesophase domains. This is achieved by holding them at an elevated temperature (usually 750 K–765 K) over a period of time (12 to 36 h). It is performed in a coking drum and is

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Investigation into Ozonation of Coal Coking Processing ...

24.06.2010  A laboratory investigation was carried out to establish whether ozonation could be used to oxidize cyanides, thiocyanates and color in wastewater from a coal coking plant to supplement biological and activated carbon treatment (GAC). Ozonation was found to be capable of oxidizing cyanide and cyanate to sufficiently low levels at relatively high stoichiometric ratios as a result of competitive ozone consumption by organic substances in the wastewater.

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Treatment of coal coking and coal gasification wastewaters ...

This investigation assessed significant issues and conducted bench scale experiments pertinent to management and reuse of coal coking and coal gasification process wastewaters. For the case of high-BTU coal gasification processes, the cooling tower is the most likely target for reuse of process wastewater. Treatment studies were performed with high BTU pilot coal gasification process quench

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PRETREATMENT OF COKING WASTEWATER BY AN ADSORPTION

Coking wastewater is a type of highly concentrated organic wastewater generated from a process of making coke, purifying coal gas and recovering coke products (Wu and Zhu, 2012).

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Adsorptive treatment of coking wastewater using raw coal ...

Raw coal fly ash (RCFA) was used directly as adsorbent to treat coking wastewater. The results show that the RCFA can introduce COD (14, 4, and 11 mg L-1 at pH = 1.0, 7.0, and 14.0, respectively) into water due to the dissolution of reductive components from RCFA, this can be avoided by washing (6

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Adsorption of Surfactants on Coal Surfaces in the Coking ...

Coking wastewater, instead of clean water, is used to prepare coking wastewater–coal slurry (CWCS), which can be used as liquid fuel for combustion and gasification. Surfactant adsorption on coal surfaces affects the preparation and industrial application of coal slurry because it is essential for improving the surface wettability of coal.

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PRETREATMENT OF COKING WASTEWATER BY AN ADSORPTION PROCESS

Keywords: coking coal, coking wastewater, adsorption, COD, phenol Introduction Coking wastewater is a type of highly concentrated organic wastewater generated from a process of making coke, purifying coal gas and recovering coke products (Wu and Zhu, 2012). Coking wastewater is a kind of intractable wastewater which is

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Adsorptive treatment of coking wastewater using raw

Raw coal fly ash (RCFA) was used directly as adsorbent to treat coking wastewater. The results show that the RCFA can introduce COD (14, 4, and 11 mg L-1 at pH = 1.0, 7.0, and 14.0, respectively) into water due to the dissolution of reductive components from RCFA, this can be avoided by washing (6 times) using distilled water. The concentration of leached metal elements in wastewater is lower than

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Treatment of coal coking and coal gasification

This investigation assessed significant issues and conducted bench scale experiments pertinent to management and reuse of coal coking and coal gasification process wastewaters. For the case of high-BTU coal gasification processes, the cooling tower is the most likely target for reuse of process wastewater. Treatment studies were performed with high BTU pilot coal gasification process quench

Read More
Adsorption of Surfactants on Coal Surfaces in the Coking ...

Coking wastewater, instead of clean water, is used to prepare coking wastewater–coal slurry (CWCS), which can be used as liquid fuel for combustion and gasification. Surfactant adsorption on coal surfaces affects the preparation and industrial application of coal slurry because it is essential for improving the surface wettability of coal.

Read More
Study on the treatment of simulated coking wastewater

In this study, simulated coking wastewater was treated by the O 3 /Fenton process in a rotating packed bed (RPB) and the results were compared with those by the O 3 process. Contrast experiments indicated that the degradation rates of phenol, aniline, quinoline and NH 3 –N in the wastewater reached 100%, 100%, 95.68% and 100% respectively under the optimum operating conditions in the O 3 ...

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Environmentally and economically efficient utilization of ...

15.11.2017  In this paper, we pay special attention to the environmental indicators characterizing the combustion of different coal ranks (gas, flame, coking, low-caking, and nonbaking coals) and coal-water slurry fuels based on the coal processing waste - filter cakes. There have been no consistent data so far on the acceptable intervals for the anthropogenic emissions of sulfur (SOx), nitrogen (NOx) and ...

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12.2 Coke Production - US EPA

The coking time is determined by the coal mixture, moisture content, rate of underfiring, and the desired properties of the coke. When demand for coke is low, coking times can be extended to 24 hours for blast furnace coke and to 48 hours for foundry coke. Coking temperatures generally range

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Coking Coal for steel production and alternatives -

Metallurgical coal, also called metcoal or coking coal, is a type of coal that is used in the production of steel. It is of a higher purity than thermal coal which is used in energy generation. To make steel, metcoal is heated at around 1100 degrees C to remove water and other chemicals. This is done without the presence of oxygen. The result is a lump of near-pure carbon which is called coke.

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Environmental Guidelines for Coke Manufacturing

Wastewater is generated at an average rate ranging from 0.3-4 cubic meters (m3) per ton of coke processed. Major wastewater streams are generated from the cooling of the coke oven gas and the processing of ammonia, tar, naphthalene, phenol, and light oil.

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Coal Mines and the Coking Process - Rivers of Steel

process used to mine the coal and label the important parts of the mine. Identify the type of mine: Shaft Mine : has a vertical entrance into a mine; extends vertically from

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Treatment of coal coking and coal gasification

This paper summarizes experimental findings on physico-chemical pretreatment and biological oxidation of phenolic wastewaters from a coke plant and two pilot high-energy coal gasification processes. Pollutant concentrations in coal coking and phenolic coal gasification effluents were present in ...

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Environmentally and economically efficient utilization of ...

15.11.2017  In this paper, we pay special attention to the environmental indicators characterizing the combustion of different coal ranks (gas, flame, coking, low-caking, and nonbaking coals) and coal-water slurry fuels based on the coal processing waste - filter cakes. There have been no consistent data so far on the acceptable intervals for the anthropogenic emissions of sulfur (SOx), nitrogen (NOx) and ...

Read More
Study on the treatment of simulated coking wastewater

In this study, simulated coking wastewater was treated by the O 3 /Fenton process in a rotating packed bed (RPB) and the results were compared with those by the O 3 process. Contrast experiments indicated that the degradation rates of phenol, aniline, quinoline and NH 3 –N in the wastewater reached 100%, 100%, 95.68% and 100% respectively under the optimum operating conditions in the O 3 ...

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Coking is a refinery process that produces 19% of finished ...

Coking is a refinery process that produces 19% of finished petroleum product exports Source: Reproduced with permission from Valero Energy Corporation. Coking is a refinery unit operation that upgrades material called bottoms from the atmospheric or vacuum distillation column into higher-value products and, as the name implies, produces petroleum coke —a coal-like material.

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4 Coal Mining and Processing Coal: Research and ...

There is approximately 2 billion tons of waste fine coal in “gob” piles resulting from past processing techniques in eastern bituminous coal fields—Pennsylvania alone reports more than 250 million tons of waste coal (McGinty, 2004). Many of these piles are environmental liabilities being dealt with under the federal Abandoned Mine Land reclamation program, but a growing number are being ...

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Settling characteristics of coal washery tailings using ...

Waste water sample The wastewater slurry sample used in the experiments was collected from one of the discharge points of the Kedla coking coal washery plant of Central Coal Field Limited (CCL), Jharkhand, India. A raw water sample from the plant, which is generally used as the make-up water, was also collected and analysed for comparison. The ...

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Coal Mines and the Coking Process - Rivers of Steel

process used to mine the coal and label the important parts of the mine. Identify the type of mine: Shaft Mine : has a vertical entrance into a mine; extends vertically from

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process for coal mining - proves-projekt.de

process for coal mining. Coal mines and the coking process coal mining choose one of the types of underground mining techniques illustrate the process used to mine the coal and label the important parts of the mine identify the type of mine shaft mine has a vertical entrance into a mine extends vertically from

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12.2 Coke Production - US EPA

The blended coal mass is heated for 12 to 20 hours for metallurgical coke. Thermal energy from the walls of the coke chamber heats the coal mass by conduction from the sides to the middle of the coke chamber. During the coking process, the charge is in direct contact with the heated wall surfaces and develops into an aggregate "plastic zone ...

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What You Should Know About Metallurgical Coal

21.08.2020  Metallurgical coal, also known as coking coal, is used to produce coke, the primary source of carbon used in steelmaking. Coal is a naturally occurring sedimentary rock formed over millions of years as plants and other organic materials are buried and subjected to geological forces. Heat and pressure cause physical and chemical changes that result in carbon-rich coal.

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