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Blast-furnace smelting technique of low-sulfur low-manganese high-iron rich-manganese slag

A technology of blast furnace smelting and manganese-rich slag, which is applied in the direction of blast furnace, blast furnace details, process efficiency improvement, etc., can solve the problems of inability to select and utilize, complex mineral composition, and no use value, so as to improve the separation effect of slag and iron, broaden the The scope of use and the effect of improving the separation ability of slag and iron

Inactive Publication Date: 2014-09-17
宁夏晟晏实业集团能源循环经济有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are a large number of "dull ores" containing 1-8% manganese and 20-40% iron that cannot be used in China: the manganese content is too low to be of use value; The composition is complex, and it is mixed and associated with magnetite, hematite, and siderite, and cannot be selected and utilized

Method used

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  • Blast-furnace smelting technique of low-sulfur low-manganese high-iron rich-manganese slag
  • Blast-furnace smelting technique of low-sulfur low-manganese high-iron rich-manganese slag

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Embodiment 1

[0024] (1) Mix low-sulfur, low-manganese, high-iron, manganese-rich slag, coke and dolomite in a weight ratio of 78:21:1 and then add them to the blast furnace from the top of the furnace;

[0025] (2) Send the hot gas and hot air sent from the hot blast stove into the blast furnace from the bottom of the furnace to burn the coke to generate gas and release heat;

[0026] (3) Control the furnace temperature at 1250-1350°C, carry out selective reduction reaction in the blast furnace, and then collect the slag on the upper part of the hearth as manganese-rich slag.

[0027] Traditional technology compares with present embodiment 1 operation:

[0028]

[0029] The process of smelting manganese-rich slag in blast furnace is the enrichment process of manganese in slag. Its basic principle is selective reduction, that is, selective reduction is carried out according to the different reduction properties of manganese, iron, phosphorus, etc., that is, while ensuring the full reduc...

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Abstract

The invention relates to a smelting technique of high-iron high-phosphorus refractory deficient-manganese ores, particularly a blast-furnace smelting technique of low-sulfur low-manganese high-iron rich-manganese slag. The technique is characterized by comprising the following steps: (1) mixing low-sulfur low-manganese high-iron rich-manganese slag, coke and dolomite in a weight ratio of 78:21:1, and adding the mixture into the blast furnace via the furnace roof; (2) sending hot coal gas and hot air from a hot-blast furnace into the blast furnace via the furnace bottom to combust coke, thereby generating coal gas and releasing heat; and (3) while controlling the furnace temperature at 1250-1350 DEG C, carrying out selective reduction reaction in the blast furnace, and collecting the slag on the upper part of the furnace hearth, thereby obtaining the rich-manganese slag. The technique uses national abundant idle deficient-manganese ores and a certain proportion of imported high-manganese high-iron ores as raw materials, and regulates the operating parameters, operating system and operating means on the basis of the traditional rich-manganese slag smelting technique and pig iron smelting technique to form a novel smelting production technique of rich-manganese slag.

Description

technical field [0001] The invention relates to a smelting process of high-iron, high-phosphorus, refractory manganese-poor ore, in particular to a blast furnace smelting process of low-sulfur, low-manganese, high-iron, and manganese-rich slag. Background technique [0002] With the increasing market demand for silicomanganese alloys, the demand for low-phosphorus, low-iron, manganese-rich slag, one of the high-quality raw materials required for the production of silicomanganese alloys, has also increased significantly. There are fewer and fewer minerals for smelting to produce manganese-rich slag. In order to maintain production, we can only rely on adding a large amount of imported manganese ore, which keeps the production cost high. [0003] However, there are a large number of "dull ores" containing 1-8% manganese and 20-40% iron that cannot be used in China: the manganese content is too low to be of use value; The composition is complex, and it is mixed and associated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B47/00C21B5/00
CPCY02P10/20
Inventor 高春虎白向龙智泽庭杨斌赵建井牛勇志
Owner 宁夏晟晏实业集团能源循环经济有限公司
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