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A method for producing molded coke by adopting semi-coke powder

A technology of blue carbon powder and calcium carbide, applied in the fields of chemical industry and environmental protection, can solve the problems of difficult evaporation, long drying process and high cost, and achieve the effects of reducing friction, complete combustion and reducing carbon content.

Active Publication Date: 2021-10-08
NINGXIA YINGLITE CHEMICALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method significantly improves the strength of the coke product, due to the formation of a dense shell on the surface of the solid pellets during this process, the external CO 2 Unable to enter the interior, continue to improve the strength of the pellets, and the internal moisture is not easy to evaporate, resulting in a longer drying process
In addition, the production of coke by this method also has the problem of high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for producing molded coke by adopting semi-coke powder, comprising the following steps:

[0022] The first step: Take calcium carbide dust removal ash with a calcium oxide content of 70% and a magnesium oxide content of 20%, add 10% dilute hydrochloric acid to the calcium carbide dust removal ash, modify the calcium carbide dust removal ash, and the modified calcium carbide dust removal ash , the optimal molar ratio of magnesium oxide to magnesium chloride is 7.

[0023] Step 2: Evenly mix 79.5 parts by weight of semi-coke powder with 19.5 parts by weight of modified calcium carbide dust and 1 part by weight of sludge as a bonding aid, and add water to completely wet the components. After wetting, the mixture The content of middle water is 20wt%. ;

[0024] Step 3: Add the mixture into a cylindrical coke mold with a size of φ30mm×H40mm, form it on a hydraulic press by cold pressing, and dry the molded coke to obtain the coke product.

[0025] Drop strength t...

Embodiment 2

[0034] A method for producing molded coke by adopting semi-coke powder, comprising the following steps:

[0035] The first step: Take calcium carbide dust removal ash with a calcium oxide content of 70% and a magnesium oxide content of 20%, add 10% dilute hydrochloric acid to the calcium carbide dust removal ash, modify the calcium carbide dust removal ash, and the modified calcium carbide dust removal ash , the optimal molar ratio of magnesium oxide to magnesium chloride is 7.

[0036] Step 2: Evenly mix 79.5 parts by weight of semi-coke powder with 19.5 parts by weight of modified calcium carbide dust and 1 part by weight of kaolin as a binding aid, and add water to make each component completely wet, and after wetting the mixture The content of water was 13% by weight. ;

[0037] Step 3: Add the mixture into a cylindrical coke mold with a size of φ30mm×H40mm, form it on a hydraulic press by cold pressing, and dry the molded coke to obtain the coke product.

[0038] The d...

Embodiment 3

[0040] A method for producing molded coke by adopting semi-coke powder, comprising the following steps:

[0041] The first step: Take calcium carbide dust removal ash with a calcium oxide content of 70% and a magnesium oxide content of 20%, add 10% dilute hydrochloric acid to the calcium carbide dust removal ash, modify the calcium carbide dust removal ash, and the modified calcium carbide dust removal ash , the optimal molar ratio of magnesium oxide to magnesium chloride is 7.

[0042] Step 2: Evenly mix 84.5 parts by weight of semi-coke powder with 10 parts by weight of modified calcium carbide dust and 5.5 parts by weight of dextrin as a bonding aid, and add water to make each component completely wet, and the mixture after wetting The content of middle water is 15wt%. ;

[0043] Step 3: Add the mixture into a cylindrical coke mold with a size of φ30mm×H40mm, form it on a hydraulic press by cold pressing, and dry the molded coke to obtain the coke product.

[0044] The dro...

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Abstract

The invention provides a method for producing molded coke by using blue coke powder. The blue coke powder is mixed with modified calcium carbide dedusting ash and a binding aid, the mixture is cold-pressed, and naturally dried to obtain a molded coke product. Using dedusting ash instead of adding other inorganic and organic reagents not only improves the strength of the coke product, but also realizes the recycling of waste and reduces the production cost; by adding sludge, kaolin or paste to the coke production formula As a binding aid, the binder is evenly distributed on the surface of the semi-coke powder, which further improves the drop strength of the coke product; and makes full use of the water in the sludge, which not only reduces the water consumption for producing coke, At the same time, it also solves the problem that the water in the sludge cannot be used; adding a certain proportion of water in the production of coke, after mixing and drying, increases the space inside the coal, and the air can enter the interior of the fuel, so that the combustion of the fuel is more complete. It can reduce the carbon content in the slag after the coke is burned.

Description

technical field [0001] The invention belongs to the technical fields of chemical industry and environmental protection, and in particular relates to a method for producing molded coke by using blue charcoal powder. Background technique [0002] With its high fixed carbon, high specific resistance, high chemical activity, low ash, low sulfur and low phosphorus characteristics, semi-coke has gradually replaced metallurgical coke and is widely used in calcium carbide, metal silicon, ferroalloy, ferrosilicon, silicon carbide, chromium Production of iron, fertilizers and other products. However, 30% of coke powder will be produced during production, transshipment, loading and unloading, and use. Due to its non-bonding and easy pulverization properties, it cannot be fully utilized and can only be used as low-grade fuel such as electric coal and civil use. Therefore, in today's energy shortage, using semi-coke powder to process into pellets instead of semi-coke is the best way to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/10
CPCC10L5/10
Inventor 李凡禄张永璞杨国强邓建民李军王小博曹智慧
Owner NINGXIA YINGLITE CHEMICALS CO LTD
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