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Method for producing formed coke by using semi-coke powder

A technology of semi-coke powder and calcium carbide, which is applied in the fields of chemical industry and environmental protection. It can solve the problems of difficult evaporation, high cost, and long drying process, and achieve the effects of reducing friction, burning completely, and reducing carbon content.

Active Publication Date: 2019-01-18
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 water in the middle 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 str...

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 water content 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 drop...

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 water in the middle 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] ...

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PUM

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Abstract

The invention provides a method for producing formed coke by using semi-coke powder. The method comprises the steps: mixing the semi-coke powder with modified calcium carbide dust removal ash and a bonding aid, carrying out cold press molding on the mixture, and carrying out natural drying to obtain a formed coke product. The dust removal ash is utilized to replace other inorganic and organic reagents, so that not only is the strength of the formed coke product improved, but also the recycle of wastes is realized, and the production cost is reduced; sludge, kaoline or dextrin serving as the bonding aid is added in a production formula of the formed coke, and a bonding agent is uniformly distributed on the surface of the semi-coke powder, so that the falling strength of the formed coke product is further improved; water in the sludge is sufficiently utilized, so that the water consumption for producing the formed coke is reduced, and meanwhile, the problem that the water in the sludge cannot be utilized is solved; and a certain proportion of water is added in formed coke production, gaps inside briquette coal are increased after mixing and drying, and air can enter the inside of fuel, so that the fuel combusts more completely, and the carbon content of furnace slag generated after the formed coke combusts can be reduced.

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 Applications(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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