Briquette and its manufacturing method
A manufacturing method and briquette technology, applied in solid fuel, petroleum industry, fuel, etc., can solve problems such as rising fuel costs and poor gas permeability of smelting and gasifiers
Active Publication Date: 2018-10-19
浦项股份有限公司
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Therefore, a large amount of briquette needs to be used, which leads to an increase in fuel costs, and the increase in the amount of pulverized coal in the melting and gasifying furnace leads to poor air permeability in the melting and gasifying furnace
Method used
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Examples
Experimental program
Comparison scheme
Effect test
experiment example 1
[0058] Coal material A having average properties and a particle size of 5 mm or less was prepared as raw coal, and the characteristics of the used coal material A are shown in Table 1 below.
[0059] 【Table 1】
[0060]
[0061] After adding 8 parts by weight of molasses as a binder, the coal material A and molasses were uniformly mixed. On the surface of a pair of forming rolls, limestone is coated as an endothermic substance, and the coating amount is 6.2 parts by weight of coal briquettes. The mixture of coal material A and molasses is sent between a pair of forming rollers coated with heat-absorbing substances for compression to produce 100 parts by weight of pillow-shaped coal with a size of 64.5mm×25.4mm×19.1mm.
experiment example 2
[0063] 6.5 parts by weight of dolomite was coated on the surfaces of a pair of forming rolls as a heat absorbing substance. Other experimental procedures are the same as the aforementioned Experimental Example 1.
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Abstract
Provided is a method for manufacturing a coal briquette, which is inserted and rapidly heated in a dome part of a melting gasifying furnace of an ingot iron manufacturing apparatus, the apparatus comprising: the melting gasifying furnace, into which reduced iron is inserted; and a reduction furnace for supplying reduced iron. The method for manufacturing a coal briquette comprises the steps of: providing a mixture of raw coal and a binder; coating a heat-absorbing material on surfaces of a pair of molding rolls employed to mold the mixture; and inserting the mixture between the pair of molding rolls, and compression-molding the mixture by the pair of molding rolls to provide a coal briquette coated with the heat-absorbing material. In the step of coating the heat-absorbing material, the heat-absorbing material is at least one selected from the group consisting of metal hydroxides, limestone, and dolomite.
Description
technical field [0001] The invention relates to a molded coal and a manufacturing method thereof. More specifically, the present invention relates to a coal briquette that is not easily pulverized when loaded into a melting and gasifying furnace due to being coated with an endothermic substance and a manufacturing method thereof. Background technique [0002] In the smelting reduction ironmaking method, a reduction furnace for reducing iron ore and a smelting gasifier for melting the reduced iron ore are used. When iron ore is smelted in the smelting gasifier, coal briquettes are loaded into the smelting gasifier as a heat source for smelting iron ore. Reduced iron is smelted into molten iron and slag in the smelting and gasifier, and then discharged to the outside. The briquettes charged into the smelter-gasifier form a packed bed of coal. Oxygen is blown in through the tuyeres provided on the smelting and gasification furnace to burn the coal packed bed to generate comb...
Claims
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IPC IPC(8): C10L5/04C10L5/36C10L5/14
CPCC10L5/04C10L5/14C10L5/36C10L2290/32C10L5/06C10L5/10C10L5/105
Inventor 金在动许南焕柳进浩孙彰一
Owner 浦项股份有限公司