CN103710538B - A kind of preparation method of zinc smelting dreg composite briquettes - Google Patents
A kind of preparation method of zinc smelting dreg composite briquettes Download PDFInfo
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- CN103710538B CN103710538B CN201310696963.5A CN201310696963A CN103710538B CN 103710538 B CN103710538 B CN 103710538B CN 201310696963 A CN201310696963 A CN 201310696963A CN 103710538 B CN103710538 B CN 103710538B
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- blast furnace
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- slag
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Abstract
The present invention relates to a kind of preparation method of zinc smelting dreg composite briquettes, belong to chemical metallurgy technical field.The step of present method is: 1. ball milling: by lead smelting gas, iron vitriol slag and blast furnace slag broken ball milling respectively, obtaining granularity was 200 orders >=80% 3 kind of powder; 2. prepare burden: above-mentioned iron vitriol slag powder, lead smelting gas powder and blast furnace slag powder 1.5 ~ 3:0.8 in mass ratio ~ 2:1 are prepared burden, allocates the silicate cement that quality 0.5 ~ 8% always expected by material into, mend in mixing process and add water to compound moisture 12 ~ 20%; 3. adopted by described compound hydraulic forming machine under forming pressure is 20 ~ 80Mpa condition, carry out pressure to roll into a ball an output and to wet agglomerate, in drying kiln, at 30 DEG C ~ 180 DEG C temperature, dry the qualified agglomerate of output moisture 5 ~ 10%.The present invention can make iron vitriol slag, lead smelting gas and blast furnace slag rapid shaping, and have technique simple, reagent consumption is few, and cost is low, the feature that ratio of briquetting is high.
Description
Technical field
The invention belongs to field of chemical metallurgical technology, especially relate to a kind of preparation method of zinc smelting dreg composite briquettes.
Background technology
Zinc abstraction technique is mainly divided into pyrometallurgy of zinc and the large class of zinc hydrometallurgy two, and current prevailing zinc metallurgy method is zinc hydrometallurgy, and zinc hydrometallurgy accounts for more than 80% of zinc output.In zinc hydrometallurgy, high temperature high acidic oils technique is a kind of conventional zinc metallurgy method, the feature of the method is that neutral leaching residue adopts hot acid to leach, zinc and dissolved ferric iron enter in leach liquor, and the element of the indissoluble such as lead, silver, copper is not leached, and are formed and leach finishing slag-lead smelting gas; Simultaneously in order to remove the iron in leach liquor, usually adopting jarosite process deironing, forming the removal that jarosite crystal realizes iron, iron removal output iron vitriol slag.Pyrometallurgy of zinc is the process adopting carbonaceous reducing agent to obtain metallic zinc, and wherein closed blast furnace zinc metallurgy is a kind of important pyrometallurgy of zinc method, and the method smelts output blast furnace slag in zinc process.When the above-mentioned lead smelting gas of conventional art employing method for smelting reduction of Ni process, iron vitriol slag and blast furnace slag, carry out respectively, as Chinese patent, " above-mentioned slag charge is simply suppressed through brick pressing machine by one drum; load and add trolley, directly adds in reducing and smelting furnace and carry out retailoring and obtain lead matte and rich indium oxide powder and zinc after seasoning.The shortcoming of this technological process is that zinc smelting dreg agglomerate dropping strength is less than 70% lower than 2 (height of fall 1m), ratio of briquetting, powder is many, cause fusion process permeability of stock column poor, heavy metal powder is flown upward, whole operating environment is poor, fusion process dust rate is large, and cause each several part in reducing and smelting furnace be heated uneven, fuel quantity consumption is large.Therefore, how to prepare high strength, the zinc smelting dreg composite briquettes of high ratio of briquetting become zinc smelting dreg tradition retailoring technical difficult points.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method of zinc smelting dreg composite briquettes, and its technique is simple, cost is low, reagent consumption is little, agglomerate intensity is high, ratio of briquetting is high.
Solving the scheme that technical problem of the present invention adopts is:
1. ball milling: by lead smelting gas, iron vitriol slag and blast furnace slag broken ball milling respectively, obtaining granularity was 200 orders >=80% 3 kind of powder;
2. prepare burden: above-mentioned iron vitriol slag powder, lead smelting gas powder and blast furnace slag powder 1.5 ~ 3:0.8 in mass ratio ~ 2:1 are prepared burden, allocates the silicate cement that quality 0.5 ~ 8% always expected by material into, mend in mixing process and add water to compound moisture 12 ~ 20%;
3. adopted by described compound hydraulic forming machine under forming pressure is 20 ~ 80Mpa condition, carry out pressure to roll into a ball an output and to wet agglomerate, in drying kiln, at 30 DEG C ~ 180 DEG C temperature, dry the qualified agglomerate of output moisture 5 ~ 10%.
Above-mentioned step 2. in, the time that is uniformly mixed of material is 5 ~ 15min; The step mixed liquor 3. molded cycle is 20 ~ 40s, and drying time is 2 ~ 24h, qualified dropping strength after oven dry should be greater than 3 times/highly for 1m.
Described iron vitriol slag and lead smelting gas are Zinc hydrometallurgy process output, and iron vitriol slag contains Zn3 ~ 7%, Pb1 ~ 5%, Fe
2o
327 ~ 35%, SiO
27 ~ 13.5%, CaO2 ~ 5%; Lead smelting gas contains Zn5 ~ 9%, Pb4 ~ 13%, Fe
2o
314 ~ 22%, SiO
28 ~ 14%, CaO2 ~ 7%; Blast furnace slag is pyrometallurgy of zinc technique output, and blast furnace slag contains Zn2 ~ 11%, Pb1 ~ 3%, Fe
2o
335 ~ 45%, SiO
213 ~ 18%, CaO10 ~ 16%.
The technology used in the present invention principle is as follows:
The stronger material of the cohesiveness such as a certain amount of colloidal iron hydroxide and silicic acid is contained in the iron vitriol slag of zinc hydrometallurgy output and lead smelting gas.In pelletizing preparation process, ironic hydroxide and silicic acid isocolloid material play dispersion and ligation between solid particulate, form solid bonded bridge, strengthen the interaction between solid particulate, obtain the agglomerate of high strength.The silicate cement simultaneously added consolidation gradually in agglomerate drying process, bonds further by solid particulate, forms the qualified agglomerate of high strength.
The invention has the beneficial effects as follows:
The present invention takes full advantage of in lead smelting gas and iron vitriol slag bonding to what realize between solid particulate containing materials such as the cohesiveness such as ironic hydroxide, silicic acid are stronger, strengthen the mutual bonding of solid particulate in agglomerate drying process simultaneously by adding a small amount of silicate cement further, thus obtain the zinc smelting dreg agglomerate of high strength.Present invention process flow process is simple, and agglomerate intensity is high, and ratio of briquetting is high, and powder is few, obviously improves ventilation property and the operating environment of retailoring process stock column.
Specific embodiment
embodiment 1.take from the iron vitriol slag of certain factory, lead smelting gas and blast furnace slag, its Chemical Composition is respectively: iron vitriol slag: Zn6.8%, Pb3.0%, Fe
2o
327.0%, SiO
28.1%, CaO2.2%; Lead smelting gas: Zn5.0%, Pb4.5%, Fe
2o
321.9%, SiO
29.5%, CaO2.0%; Blast furnace slag: Zn8.9%, Pb1.0%, Fe
2o
335.2%, SiO
216.6%, CaO12.4%; By iron vitriol slag, lead smelting gas and blast furnace slag respectively broken sieve ball milling obtain three kinds of powders that-200 orders account for 80%.Get 15kg iron vitriol slag powder, 8kg lead smelting gas powder and 10kg blast furnace slag powder, allocate 0.5kg silicate cement into, adopt mixer batch mixing 5min, batch mixing process supplements 1.5kg water, and after moisturizing mixing, mixture moisture content is 12%.Adopt hydraulic forming machine briquetting, forming pressure is 20Mpa, and shaping cycle is 20s, and the wet agglomerate of briquetting output is dried 24 hours at 30 DEG C.The chemical composition of the zinc smelting dreg composite briquettes obtained is Zn6.5%, Pb3.0%, Fe
2o
326.6%, SiO
211.1%, CaO5.1%, water content 10%.
The index obtained: dropping strength 5 times (height of fall is 1m), ratio of briquetting 95%.
embodiment 2.take from the iron vitriol slag of certain factory, lead smelting gas and blast furnace slag, its Chemical Composition is respectively: iron vitriol slag: Zn3.0%, Pb1.1%, Fe
2o
331.7%, SiO
213.2%, CaO3.5%; Lead smelting gas: Zn7.3%, Pb10.9%, Fe
2o
314.1%, SiO
213.0%, CaO3.6%; Blast furnace slag: Zn11.0%, Pb2.1%, Fe
2o
340.7%, SiO
218.0%, CaO10.3%; By iron vitriol slag, lead smelting gas and blast furnace slag respectively broken sieve ball milling obtain three kinds of powders that-200 orders account for 80%.Get 20kg iron vitriol slag powder, 12kg lead smelting gas powder and 10kg blast furnace slag powder, allocate 1.26kg silicate cement (accounting for 3% of material total amount) into, adopt mixer batch mixing 10min, batch mixing process supplements 2.75kg water, and after moisturizing mixing, mixture moisture content is 16%.Adopt hydraulic forming machine briquetting, forming pressure is 50Mpa, and shaping cycle is 30s, and the wet agglomerate of briquetting output is dried 12 hours at 100 DEG C.The chemical composition of the zinc smelting dreg composite briquettes obtained is Zn5.3%, Pb4.2%, Fe
2o
319.2%, SiO
210.6%, CaO4.0%, water content 5%.
The index obtained: dropping strength 7 times (height of fall is 1m), ratio of briquetting 96.5%.
embodiment 3.take from the iron vitriol slag of certain factory, lead smelting gas and blast furnace slag, its Chemical Composition is respectively: iron vitriol slag: Zn3.2%, Pb4.9%, Fe
2o
335.0%, SiO
29.2%, CaO4.8%; Lead smelting gas: Zn9.0%, Pb12.9%, Fe
2o
316.5%, SiO
214.0%, CaO6.8%; Blast furnace slag: Zn2.0%, Pb3.0%, Fe
2o
345.0%, SiO
217.5%, CaO16.0%; By iron vitriol slag, lead smelting gas and blast furnace slag respectively broken sieve ball milling obtain three kinds of powders that-200 orders account for 80%.Get 30kg iron vitriol slag powder, 15kg lead smelting gas powder and 10kg blast furnace slag powder, allocate 4.4kg silicate cement (accounting for 8% of material total amount) into, adopt mixer batch mixing 15min, batch mixing process supplements 6.53kg water, and after moisturizing mixing, mixture moisture content is 20%.Adopt hydraulic forming machine briquetting, forming pressure is 80Mpa, and shaping cycle is 40s, and the wet agglomerate of briquetting output is dried 2 hours at 200 DEG C.The chemical composition of the zinc smelting dreg composite briquettes obtained is Zn3.2%, Pb4.7%, Fe
2o
317.5%, SiO
28.2%, CaO5.3%, water content 8%.
The index obtained: dropping strength 10 times (height of fall is 1m), ratio of briquetting 98%.
Claims (3)
1. a preparation method for zinc smelting dreg composite briquettes, is characterized in that:
1. ball milling: by lead smelting gas, iron vitriol slag and blast furnace slag broken ball milling respectively, obtaining granularity was 200 orders >=80% 3 kind of powder;
2. prepare burden: above-mentioned iron vitriol slag powder, lead smelting gas powder and blast furnace slag powder 1.5 ~ 3:0.8 in mass ratio ~ 2:1 are prepared burden, allocates the silicate cement that quality 0.5 ~ 8% always expected by material into, mend in mixing process and add water to compound moisture 12 ~ 20%;
3. adopted by described compound hydraulic forming machine under forming pressure is 20 ~ 80MPa condition, carry out pressure to roll into a ball an output and to wet agglomerate, in drying kiln, at 30 DEG C ~ 180 DEG C temperature, dry the qualified agglomerate of output moisture 5 ~ 10%.
2. the preparation method of zinc smelting dreg composite briquettes according to claim 1, is characterized in that: step 2. in, the time that is uniformly mixed of material is 5 ~ 15min; The step mixed liquor 3. molded cycle is 20 ~ 40s, and drying time is 2 ~ 24h, and the qualified agglomerate intensity after oven dry should be greater than 3 times/1m.
3. the preparation method of zinc smelting dreg composite briquettes according to claim 1, is characterized in that: described iron vitriol slag and lead smelting gas are Zinc hydrometallurgy process output, iron vitriol slag containing Zn3 ~ 7%, Pb1 ~ 5%, Fe
2o
327 ~ 35%, SiO
27 ~ 13.5%, CaO2 ~ 5%; Lead smelting gas contains Zn5 ~ 9%, Pb4 ~ 13%, Fe
2o
314 ~ 22%, SiO
28 ~ 14%, CaO2 ~ 7%; Blast furnace slag is pyrometallurgy of zinc technique output, and blast furnace slag contains Zn2 ~ 11%, Pb1 ~ 3%, Fe
2o
335 ~ 45%, SiO
213 ~ 18%, CaO10 ~ 16%.
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| CN103710538B true CN103710538B (en) | 2016-01-20 |
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| CN108751878B (en) * | 2018-08-22 | 2021-08-03 | 中国有色桂林矿产地质研究院有限公司 | Curing agent and curing treatment process for zinc smelting waste residues |
| CN109811141B (en) * | 2019-02-28 | 2021-06-08 | 西安建筑科技大学 | Lead smelting slag charging granules and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643840A (en) * | 2009-09-02 | 2010-02-10 | 中南大学 | Complex manganese ore powder pelletization process |
| CN102242254A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | High sulfide pyrite pellet reinforced roasting consolidation technology |
| CN102912147A (en) * | 2012-11-15 | 2013-02-06 | 昆明冶金研究院 | Process for recycling lead zinc, silver and iron from tailings after carrying out sulphur flotation on zinc oxygen pressure leaching slag |
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2013
- 2013-12-18 CN CN201310696963.5A patent/CN103710538B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643840A (en) * | 2009-09-02 | 2010-02-10 | 中南大学 | Complex manganese ore powder pelletization process |
| CN102242254A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | High sulfide pyrite pellet reinforced roasting consolidation technology |
| CN102912147A (en) * | 2012-11-15 | 2013-02-06 | 昆明冶金研究院 | Process for recycling lead zinc, silver and iron from tailings after carrying out sulphur flotation on zinc oxygen pressure leaching slag |
Non-Patent Citations (1)
| Title |
|---|
| 钒钛磁铁矿金属化球团固结机理研究;张建良等;《烧结球团》;20120630;第37卷(第3期);第26-30页 * |
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