CN1395079A - Blast furnace powder-spraying intensified smelting technology - Google Patents
Blast furnace powder-spraying intensified smelting technology Download PDFInfo
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- CN1395079A CN1395079A CN 02113205 CN02113205A CN1395079A CN 1395079 A CN1395079 A CN 1395079A CN 02113205 CN02113205 CN 02113205 CN 02113205 A CN02113205 A CN 02113205A CN 1395079 A CN1395079 A CN 1395079A
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Abstract
In the traditional smelting process said invention can mix one of powdered coal, coke powder and powder material or their composite with air, then uses spray gun to spray them into blast furnace for smelting. Said invention can greatly simplify material preparation procedure, can raise treatment capacity of its sintering procedure, and can fully utilize the superiority of powder material with large specific surface area so as to intensity smelting process.
Description
Affiliated technical field
The invention belongs to the shaft smelting non-ferrous metal, particularly refine plumbous technical field.
Background technology
Blast furnace has characteristics such as specific productivity is big, adaptability to raw material is strong, the thermal efficiency is high, cost is low, floor space is little, add the rich experiences and the constantly technological improvement of long-term production accumulation, this traditional smelting equipment and technology are used widely in the plumbous field of refining.The containing lead skim (leaded 10～60%) and can use retailoring of blast furnace of the rich lump ore of lead agglomerate, lead oxide nodulizing, lead oxide, other oxidizing semlting technology output, the lead bullion in the whole world 80% originates in blast furnace reduction at present.When handling lead concentrate, tradition refining splicer skill is with the concentrate sintering desulfuration, and 50～70% powdery agglomerate can not directly add shaft smelting behind the sintering, must return sintering circuit, with carry out sintering after lead concentrate mixes, the amount of returning is big, has reduced the disposal ability of sintering plant.On the other hand, this traditional smelting technology will consume the block coke of a large amount of costlinesses, and during as the melting agglomerate, burnt rate is 8～14%, accounts for more than 20% of lead smelt cost.Granular material (sintering back powder, leaded flue dust, lead oxide fine ore, Water Quenching Slag) needs through behind granulation or the ingot bar; could guarantee that shaft smelting has air permeability and good; make lead compound in reducing atmosphere, finish fusion process, to obtain desirable technical-economic index.Thereby cause melting pretreatment procedure complexity or decrease in efficiency.
Summary of the invention
Purpose of the present invention is just in order to solve existing blast furnace above shortcomings part, and provide a kind of block coke consumption that reduces, directly spray into dusty fuel in the stove, simultaneously, various oxide materials, particularly the lead oxides material of powdery partly or entirely directly can be blown into the blast furnace powder-spraying intensified smelting technology of stove melting.
The objective of the invention is to be achieved through the following technical solutions.
This blast furnace intensified smelting technology is in traditional melting non-ferrous metal technical process, the also single or combination and mixes and afterwards spray into melting in the blast furnace with spray gun going into the stokehold with air with fine coal, coke powder and granular material.
When fine coal, coke powder and granular material mixed, the weight ratio of fine coal and coke powder (single or combination) accounted for 1/2 at least; The granularity of fine coal, coke powder and material all is not more than 2mm; Described granular material is sintering back powder or Water Quenching Slag or flue dust or lead oxide fine ore or their mixture; Fine coal, coke powder and granular material spray into the tuyere area of the interior winding-up position of stove at smelting furnace; Described air is normal air or oxygen-enriched air; The winding-up amount that fine coal is blown into blast furnace is 0～200kg/t lead materials, and the winding-up amount of granular material accounts for 10～40% of blast furnace treating capacity.
This melting technique has reduced the consumption of block coke, can alleviate the deficiency of China's coking resource; Can directly utilize cheap broken Jiao, improve the utilization rate of coke, reduce smelting cost; Simultaneously, owing to granular material directly can be blown into stove, remove granulation, the ingot bar of granular material from and avoided a large amount of sintering back powders to enter sintering circuit, can simplify procedure for preparation greatly, improve the disposal ability of sintering circuit, and make full use of the big advantage of powder specific area, intensified smelting process.
The specific embodiment
Further set forth the present invention below by embodiment.
Be the block coke of 30～100mm, block lead-containing material (agglomerate, the rich lump ore of lead oxide, block oxidation lead skim) and flux with granularity adds in the stove by the order of coke → lead-containing material → flux in batches.In the smelting process, material in the stove moves down from top to bottom gradually, the reducibility gas that produces in the burning of the coke of blast furnace tuyere area flows from the bottom up, material with the convection process of reducibility gas in, constantly change its physics and chemical property, lead compound is reduced gradually, until finishing whole metallurgical reactions.In the blast furnace smelting process, granularity is mixed the back less than fine coal, coke powder and the granular material of 2mm spray into stove melting from the tuyere area of blast furnace with normal air or oxygen-enriched air with spray gun.Fine coal, coke powder and granular material can mix the back separately separately and spray in the stove respectively with spray gun with air, also can earlier fine coal, coke powder and granular material be mixed to mix with air again and then near the tuyere area of blast furnace, spray into the stove with spray gun, utilize the big characteristics of granular material specific area, realize the blast furnace intensified smelting, simplify the pretreatment procedure of shaft smelting.Fine coal and coke powder can only use one, but also both are used in combination, but its single or combination is when mixing use with granular material, and weight ratio is not less than 1/2.Coke powder or blast furnace that employed coke powder can be the attached product of coke factory use remaining broken Jiao in back.The winding-up amount of fine coal or coke powder changes according to handling the gas permeability of lead-containing material in blast furnace, and excursion is at 0～200kg/t lead materials, and the winding-up amount of granular material accounts for 10～40% of blast furnace treating capacity.Technology of the present invention has been removed from the traditional handicraft must become block operation with the granular material sintering processes, and the coal dust or the coke powder that can make full use of the cheapness of the attached product of coke factory act as a fuel, reduce the consumption of block coke, both reduced production cost, but intensified smelting process again.
The present invention also is applicable to airtight blast furnace and handles the blast furnace of zinc, copper, antimony, tin.
Claims (8)
1, blast furnace powder-spraying intensified smelting technology, be coke, return slag, material, flux to be added in batches carry out melting in the blast furnace, it is characterized in that, in fusion process, also single or combination and mixes with air and then to spray into melting in the blast furnace with spray gun with fine coal, coke powder and granular material.
2, melting technique according to claim 1 is characterized in that, when fine coal, coke powder and granular material mixed, the weight ratio of fine coal and coke powder (single or combination) accounted for 1/2 at least.
3, melting technique according to claim 1 is characterized in that, the granularity of fine coal and coke powder is not more than 2mm.
4, melting technique according to claim 1 is characterized in that, the granularity of granular material is not more than 2mm.
5, melting technique according to claim 1 is characterized in that, described granular material is sintering back powder or Water Quenching Slag or flue dust or lead oxide fine ore or their mixture.
6, melting technique according to claim 1 is characterized in that, fine coal, coke powder and granular material spray into the tuyere area of the interior winding-up position of stove at smelting furnace.
7, melting technique according to claim 1 is characterized in that, described air is normal air or oxygen-enriched air.
8, melting technique according to claim 1 is characterized in that, the winding-up amount that fine coal or coke powder is blown into blast furnace is 0～200kg/t lead materials, and the winding-up amount of granular material accounts for 10～40% of blast furnace treating capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02113205 CN1233976C (en) | 2002-01-05 | 2002-01-05 | Blast furnace powder-spraying intensified smelting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02113205 CN1233976C (en) | 2002-01-05 | 2002-01-05 | Blast furnace powder-spraying intensified smelting technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1395079A true CN1395079A (en) | 2003-02-05 |
| CN1233976C CN1233976C (en) | 2005-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02113205 Expired - Fee Related CN1233976C (en) | 2002-01-05 | 2002-01-05 | Blast furnace powder-spraying intensified smelting technology |
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| CN (1) | CN1233976C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463974C (en) * | 2007-03-21 | 2009-02-25 | 鞍钢股份有限公司 | Dry cooled coke powder blowing process and apparatus for blast furnace |
| CN102102152A (en) * | 2009-12-17 | 2011-06-22 | 云南冶金集团股份有限公司 | Method for smelting lead by reducing lead-rich slags |
| CN105603197A (en) * | 2015-12-23 | 2016-05-25 | 河南豫光金铅股份有限公司 | Device and process for directly reducing smelt antimony from antimony slag and antimony ash |
-
2002
- 2002-01-05 CN CN 02113205 patent/CN1233976C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463974C (en) * | 2007-03-21 | 2009-02-25 | 鞍钢股份有限公司 | Dry cooled coke powder blowing process and apparatus for blast furnace |
| CN102102152A (en) * | 2009-12-17 | 2011-06-22 | 云南冶金集团股份有限公司 | Method for smelting lead by reducing lead-rich slags |
| CN105603197A (en) * | 2015-12-23 | 2016-05-25 | 河南豫光金铅股份有限公司 | Device and process for directly reducing smelt antimony from antimony slag and antimony ash |
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| Publication number | Publication date |
|---|---|
| CN1233976C (en) | 2005-12-28 |
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