Production method of formed coke

Abstract

The invention discloses a production method of formed coke. In the method, the working procedure of drying formed coke is added, thus the carbonization time can be shortened, the calorific value of dry distillation gas can be increased, and the large-scale production of formed coke can be ensured; an external combustion type carbonization furnace is used in the carbonization process, the carbonization equipment has long flue stroke, the residence time of flue gas is long and the thermal efficiency is high; the quantity of heat can be adjusted to ensure the carbonization quality of the formed coke; the integration of carbonization and dry quenching can be realized, energy-saving analysis is performed on the energy requirement and supply of the carbonization process and a specific energy-saving scheme is provided; a specific temperature control scheme of the carbonization process is provided particularly for the carbonization of formed coke prepared from calcium carbide; and a novel water jacket is used for dry quenching, thus the water content of the formed coke product can be reduced, the water pollution can be prevented, the energy can be saved and the strength of formed coke canbe increased. The formed coke produced by the method meets the quality requirements, the operating cost is low, the floor space is small, the investment is less, the technology and equipment are mature and the industrial and large-scale production can be realized.

Description

technical field [0001] The invention relates to a method for producing coke. Background technique [0002] At present, coke is widely used in iron and steel smelting, calcium carbide and yellow phosphorus production. Traditional coke is mainly produced from high-quality main coking coal as raw material, but now the main coking coal resources are gradually tense and in short supply, so the subject of producing coke substitutes is proposed. Among them, through the research and use of new production processes and equipment, a large number of non-main coking coals are used to produce molded coke, which replaces traditional coke for calcium carbide, yellow phosphorus, ferroalloy, smelting and casting production, which has become a hot research topic. [0003] Coke generally plays three roles in the production of iron and steel smelting, calcium carbide and yellow phosphorus: the first is to provide carbon elements for the production of various products (such as calcium carbide);...

AI Technical Summary

Problems solved by technology

[0006] One is that the raw materials for the production of coke are single or there is no suitable and feasible plan for the ratio of composite raw materials, and the raw materials are not properly treated, resulting in unstable and uncontrollable quality of coke, making it difficult to produce on a large scale

Raw materials for the production of shaped coke, such as the application number 200810146883.1 of the Chinese patent entitled "A Production Method for Formed Coke", the raw materials used are coal powder or coke powder, and the raw materials are single, and the performance of different raw materials cannot be well utilized. High-quality molded coke; the moisture and particle size of the raw materials are not properly controlled, which leads to difficulties in molding the molded coal, and the cold strength during the transportation of the molded coal and the cold and hot strength of the molded coke during the coalization process cannot be obtained Guarantee, affecting the quality of coke products;

[0007] The second is that the strength of the intermediate product molded coal obtained by the existing production method is low, the damage rate is high during the transportation of the molded coal, and the molded coal is easy to soften and deform during the carbonization process, so that the qualified rate of the final molded coke product is low, wasting energy and capacity;

[0008] The third is that in the carbonization process, due to the limitations of existing carbonization equipment and processes, the production capacity of the coke is low, and the heat energy cannot be fully utilized.

The combustion chamber in the current carbonization furnace is generally a vertical straight-through form, and no horizontal fire channel is provided, so that the residence time of the combustion flue gas in the combustion chamber is short, and the heat energy utilization is low (as the patent publication number is CN2680669 Chinese patent, external heat vertical Type coke carbonization furnace) resulting in low production capacity, the quality of coke products can not be guaranteed;

[0009] Fourth, the coke quenching method of the existing production method is unreasonable

There are many problems in this coke quenching method: first, it causes serious air and dust pollution; second, it causes serious waste water pollution; The thermal strength of the coke; Fourth, the moisture content of the coke has increased significantly, so that the coke needs to be dried and pretreated during use, which increases the cost of use

As mentioned in the Chinese patent whose application number is 01232390.X and the patent title is "A Kind of Dry Quenching Coke Oven Body", although this method can alleviate environmental protection problems and improve thermal energy utilization, its investment is too large and the operation too expensive

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