CN1237640A - Pelletizing covering roasting oxidation method for sulfoarsenic metal ore - Google Patents
Pelletizing covering roasting oxidation method for sulfoarsenic metal ore Download PDFInfo
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- CN1237640A CN1237640A CN99109333A CN99109333A CN1237640A CN 1237640 A CN1237640 A CN 1237640A CN 99109333 A CN99109333 A CN 99109333A CN 99109333 A CN99109333 A CN 99109333A CN 1237640 A CN1237640 A CN 1237640A
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Abstract
The present invention relates to a pelletizing, covering, calcining and oxidizing pretreatment method for metal ore containing sulfur and arsenic. Said method includes the following procedures: preparing raw material, pelletizing, pellet-covering, drying covered pellet, calcining covered pellet and removing cover, calcines and covering layer waste material. Said method possesses the following advantages: the sulfur and arsenic being in the ore are completely fixed in the covering layer, the sulfate and arsenate produced when calcining can be completely separated from calcines so it can reduce amount of after treatment for extracting metal. The calcines obtained after pre-treatment can be treated by wet process, also can be treated by pyrogenic process. Said method also can be used to pretreat ore concentrate.
Description
The present invention relates to a kind of treatment process of giving that is used for sulphur arsenic metallic ore, specifically, the present invention relates to a kind of pelletizing covering roasting oxidation method that is used for sulphur arsenic metallic ore.
In the metallurgy of sulfur-bearing arsenic metallic ore or concentrate, at first to carry out the pre-treatment of raw material, destroy the sulfoarsenide structure in ore or the concentrate, traditional pretreatment process is a roasting oxidation method.The shortcoming of this method maximum is to contain toxic gases such as a large amount of sulfurous gas and white arsenic in the baking flue gas, easily contaminate environment.The U.S.＜JOM〉1973 the 12nd phases of magazine, the 12nd phase in 1991 introduced the method for unslaked lime CaO pellet roasting oxide treatment copper-sulphide ores and gold mine respectively, this method is that sulphur arsenic fixing agent (unslaked lime) is mixed back balling-up roasting again with breeze, and the sulphur fixed rate is greater than 95%.The advantage of this method is to have reduced the content of toxic gases such as sulfur dioxide in flue gas and white arsenic, and its shortcoming is that sulphur arsenic is fixing not thorough because the sulphur arsenic of the 1 millimeter scope in pelletizing surface be fixing incessantly.In addition, by the calcining of lime pellet roasting oxidation style gained, owing to contain inseparable vitriol and arsenate, high temperature can decompose, and therefore can only use wet processing, can not use pyrogenic attack.
The objective of the invention is to overcome above-mentioned weak point of the prior art, and a kind of fixing sulphur arsenic completely is provided, the both available wet processing of calcining, also the pelletizing covering roasting oxidation of available pyrogenic attack gives treatment process.
Purpose of the present invention can reach by following measure: a kind of pelletizing covering roasting oxidation method that is used for sulphur arsenic metallic ore comprises following operation successively: feedstock production, granulation, pelletizing covering, dressing ball drying, the roasting of dressing ball, roasting ball go clothing, calcining to send into subsequent handling to extract metal and coatings and deliver to scrap yard and store up; Ore waste material and caking agent are made pelletizing; Pelletizing sulphur arsenic fixing agent dressing; In air atmosphere, carry out roasting after the dressing ball drying; The roasting ball warp of roasting gained is removed clothing, isolates calcining and coatings waste material.
Purpose of the present invention can also reach by following measure:
Feedstock production: comprise the preparation of ore or concentrate, caking agent preparation and the preparation of sulphur arsenic fixing agent.The purpose of these three kinds of feedstock production is to guarantee the granularity of raw material and the requirement that water ratio meets pelletization.If raw material is block, then at first to carry out fragmentation, levigate to 200 orders, wherein be greater than 50% less than 200 orders; If treated flotation concentrate, then needn't pulverizing and jevigating.The water ratio of raw material is less than 10%, otherwise will give first drying.
The purpose of granulating is that the compound of ore and caking agent is made satisfactory lumps material; granulation is made at disc type nodulizer or drum type brake nodulizer; lumps material after the granulation when the raw material water ratio is not enough to form pelletizing, should additionally add moisture content pelletizing when granulating.Single ore can not form pelletizing, add caking agent.The available caking agent has wilkinite.The diameter of pelletizing is the 10-35 millimeter.
Pelletizing covering be apply in the pelletizing outside that granulate to produce cover one deck by certain thickness, evenly, successive, the tectum formed by sulphur arsenic fixing agent; this tectum is coatings; this process is dressing; coated pelletizing is in the dressing ball, and the dressing ball is made with disc type nodulizer or drum type brake nodulizer.
The used raw material of dressing is a sulphur arsenic fixing agent.Sulphur arsenic fixing agent is at a certain temperature, can with the sulfurous gas that produces in the roasting process and the alkaline matter of white arsenic generation chemical reaction.Available sulphur arsenic fixing agent is white lime Ca (OH)
2The white lime wide material sources, cheap, sulphur arsenic good fixing effect, the salt of generation (calcium sulfate CaSO
4With Tricalcium arsenate Ca
3(AsO
4)
2) the chemical stability height, being difficult for producing secondary pollution etc., the white lime consumption is 1.05-1.2 a times of theoretical consumption.
Dressing ball drying: contain the dressing ball of caking agent wilkinite and sulphur arsenic fixing agent white lime,, can produce the low-temperature surface crackle, 300-500 ℃ explosion can take place in the break temperature scope at the dry initial stage if drying temperature is improper.
The roasting of dressing ball is the sulfoarsenide oxygenolysis that makes in ore or the concentrate, the metal sulfoarsenide is converted into metal oxide, the sulfurous gas and the arsenous acid gas that generate spread to the outside from dressing ball inside, by sulphur arsenic immobilized capture reagent, realize the no gaseous emission of sulfurous gas and white arsenic at the coatings place.Maturing temperature depends on three factors, the one, maturing temperature is higher than the ignition temperature of sulfoarsenide, the 2nd, maturing temperature is lower than the lowest decomposition temperature of sulphur Tricalcium arsenate, the 3rd, make calcining adapt to the maturing temperature of subsequent extracted metal operation most, maturing temperature is generally 450-750 ℃, roasting is carried out in air atmosphere, the flow of bubbling air and speed do not have strict demand in stoving oven, the roasting ball of roasting process gained is to use shaft furnace, rotary kiln baking, roasting time is decided on the size of dressing ball, and when the dressing spherical diameter was the 30-35 millimeter, roasting time was 4-6 hour; When the dressing spherical diameter was the 15-20 millimeter, roasting time was 2-4 hour.
The roasting ball removes clothing: the roasting ball after the roasting is made up of inside and outside three parts, outermost layer is the sulphur arsenic fixing agent that chemical reaction does not take place, the middle layer is made up of thioarsenite, inside is the calcining that metal oxide is formed, it is to realize separating of calcining and the coatings of being made up of thioarsenite that the roasting ball goes the purpose of clothing, it is isolating by Mechanical Crushing, screening, reselecting method that the calcining of clothing process gained and coatings waste material are removed in roasting, the calcining that reclaims is sent into subsequent handling and is extracted metal, and the coatings that contains thioarsenite is sent into scrap yard and stored up.
The pelletizing covering roasting oxidation give treatment process, not only be used for sulfur-bearing arsenic metallic ore, also be used for concentrate.
The present invention used " % ", ratio and multiple are all by weight.
The present invention has following advantage compared to existing technology:
1. toxic gases such as the sulfurous gas of roasting generation and white arsenic are fixed to insoluble salt for a full due, realize no noxious gas emission, solve problem of environmental pollution.
2. realize separating of calcining and coatings, reduced the treatment capacity of subsequent extracted metal operation, improved the subsequent handling condition.
3. having adopted sulphur arsenic fixing agent is white lime, and wide material sources are cheap.
Description of drawings is as follows:
Fig. 1: process flow sheet
Below embodiment just, consult accompanying drawing the present invention elaborated.
Embodiment 1
Certain gold ore, sulfur-bearing 29.37%, arsenic 8.24%, gold 151.40 gram/tons, granularity is for to account for 70% less than 200 orders, and dry back concentrate water ratio is lower than 3%.Concentrate is prepared burden, is mixed in 100: 4.0 ratios with the binding agent wilkinite, compound on the disc type nodulizer granulation 20-25 minute, about 30 millimeters of gained pelletizing diameter, pelletizing water ratio 10-11%.The pelletizing size ratio that the disc type nodulizer is produced need not sieved than homogeneous, pelletizing and white lime on the disc type nodulizer dressing 8-10 minute, and about 35 millimeters of gained dressing spherical diameter, the white lime consumption is about 1.15 times of theoretical consumption.The dressing ball is 200 ℃ loft drier inner drying 6 hours, is lower than 5% to dressing ball water ratio.The roasting in shaft furnace of dried dressing ball, 600 ℃ of maturing temperatures, roasting time 4-6 hour, calcination atmosphere was an air atmosphere, provided air in the natural convection mode in kiln, to air flow quantity and speed no requirement (NR).Dressing ball after the roasting is cooled to room temperature, cooled dressing ball adopt Mechanical Crushing to granularity less than 10 millimeters, adopt reselecting method to reclaim calcining, the gained calcining is brown, the coatings that abandons is light yellow shell bulk.The sulphur fixed rate is greater than 99.8%, and the arsenic fixed rate is greater than 99.7%.
Embodiment 2
Certain lead-zinc ore, leaded 3.27%, zinc 1.36%, sulphur 5.24%, arsenic 0.56%, ore reduction to granularity for to account for 85% less than 200 orders.Ore is prepared burden, is mixed in 100: 1.5 ratios with the binding agent wilkinite, and compound is granulated on the drum type brake nodulizer, and the granulation product sieves, and particle diameter returns the drum type brake nodulizer less than 15 millimeters pelletizing, and particle diameter enters the dressing stage greater than 15 millimeters pelletizing.Pelletizing and white lime is dressing on the drum type brake nodulizer, and gained dressing spherical diameter is the 15-20 millimeter, and the white lime consumption is about 1.10 times of theoretical consumption.The seasoning of dressing ball to water ratio less than 5%.The roasting in rotary kiln of dried dressing ball, 650 ℃ of maturing temperatures, roasting time 2-4 hour, calcination atmosphere was an air atmosphere, provided air in the natural convection mode in kiln, to air flow quantity and speed no requirement (NR).Dressing ball after the roasting is cooled to room temperature.Cooled dressing ball adopt Mechanical Crushing to granularity less than 5 millimeters, adopt reselecting method to reclaim calcining.Sulphur arsenic fixed rate is greater than 99.9%.
Claims (12)
1, a kind of pelletizing covering roasting oxidation method that is used for sulphur arsenic metallic ore, it is characterized in that: this method comprises following operation successively: feedstock production (1), granulate (2), pelletizing covering (3), dressing ball drying (4), dressing ball roasting (5), roasting ball go clothing (6), roasting to send into subsequent handling to extract metal (7) and coatings and deliver to scrap yard and store up (8);
Ore and caking agent are made pelletizing; Pelletizing sulphur arsenic fixing agent dressing; In air atmosphere, carry out roasting after the dressing ball drying; The roasting ball warp of roasting gained is removed clothing, isolates calcining and coatings waste material.
2, pelletizing covering roasting oxidation method according to claim 1 is characterized in that: granulation is made with disc type nodulizer or drum type brake nodulizer.
3, according to claim 1 and 2 described pelletizing covering roasting oxidation methods, it is characterized in that: the caking agent that uses of granulating is a wilkinite.
4, according to the described pelletizing covering roasting oxidation method of claim 1 to 3, it is characterized in that: the bentonite consumption that pelletizing uses is the 0.5-5% of ore weight.
5, pelletizing covering roasting oxidation method according to claim 1 is characterized in that: the made dressing ball of pelletizing covering process is made with disc type apparatus for making pearl ball or drum type brake nodulizer.
6, according to claim 1 and 5 described pelletizing covering roasting oxidation methods, it is characterized in that: the used sulphur arsenic fixing agent of pelletizing covering process is a white lime.
7, according to claim 1 and 6 described pelletizing covering roasting oxidation methods, it is characterized in that: the used sulphur arsenic fixing agent white lime consumption of pelletizing covering process is 1.05-1.2 a times of theoretical consumption.
8, pelletizing covering roasting oxidation method according to claim 1 is characterized in that: the roasting ball of dressing ball roasting process gained is with shaft furnace, rotary kiln baking.
9, according to claim 1 and 8 described pelletizing covering roasting oxidation methods, it is characterized in that: roasting is carried out in air atmosphere, and air flow quantity and speed are not had strict demand.
10, according to claim 1,8 and 9 described pelletizing covering roasting oxidation methods, it is characterized in that: when the dressing spherical diameter was the 30-35 millimeter, roasting time was 4-6 hour; When the dressing spherical diameter was the 15-20 millimeter, roasting time was 2-4 hour.
11, pelletizing covering roasting oxidation method according to claim 1 is characterized in that: the roasting ball removes the calcining and the coatings waste material of clothing process gained, is isolating by Mechanical Crushing, screening, reselecting method.
12, the purposes of pelletizing covering roasting oxidation method is characterized in that: not only be used for sulfur-bearing arsenic metallic ore, also can be used for concentrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99109333A CN1069701C (en) | 1999-06-24 | 1999-06-24 | Pelletizing covering roasting oxidation method for sulfoarsenic metal ore |
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|---|---|---|---|
| CN99109333A CN1069701C (en) | 1999-06-24 | 1999-06-24 | Pelletizing covering roasting oxidation method for sulfoarsenic metal ore |
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| CN1237640A true CN1237640A (en) | 1999-12-08 |
| CN1069701C CN1069701C (en) | 2001-08-15 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789534A (en) * | 2014-02-18 | 2014-05-14 | 云龙县铂翠贵金属科技有限公司 | Method for enriching noble metals from high-sulfur material |
| CN103805771A (en) * | 2014-02-25 | 2014-05-21 | 郭世宏 | Method for producing iron from sulfuric acid residue |
| CN105886689A (en) * | 2016-05-03 | 2016-08-24 | 重庆大学 | Pellet coating material and anti-bonding method in metalized roasting process |
| CN106566923A (en) * | 2016-10-28 | 2017-04-19 | 江苏省冶金设计院有限公司 | Comprehensive utilization method of arsenic-contained iron ore and red mud |
| CN108251637A (en) * | 2018-01-30 | 2018-07-06 | 华北理工大学 | A kind of method of harmful element in oxidizing roasting curing process copper ashes |
| CN109482611A (en) * | 2018-11-14 | 2019-03-19 | 铜陵有色金属集团股份有限公司 | The non-pollution processing method of the slugging containing pozzuolite |
| CN113637842A (en) * | 2021-08-16 | 2021-11-12 | 中南大学 | Double-layer pellet pelletizing system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU420687A1 (en) * | 1972-04-20 | 1974-03-25 | Ф. Стрижов, П. А. сников, А. И. Окунев, В. А. БарУ шш, В. П. Голубое, Ю. Д. Ткаченко, В. П. Суханкин, В. А. Чисюр лов, А. Н. Ильин, М. В. Потапов, И. А. Кришталь, Ф. И. Мал шев | METHOD FOR PROCESSING FINE-GRINNED CONCENTRATES |
| JPS59164637A (en) * | 1983-02-28 | 1984-09-17 | メタラ−ジカル・プロセシイズ・リミテツド | Method of baking sulfide-containing material |
| RU2092588C1 (en) * | 1995-07-07 | 1997-10-10 | Московский государственный институт стали и сплавов (технологический университет) | Method of producing agglomerated stock from sulfur material |
| CN1047801C (en) * | 1997-01-15 | 1999-12-29 | 核工业北京化工冶金研究院 | Method for extracting gold from refractory ore |
-
1999
- 1999-06-24 CN CN99109333A patent/CN1069701C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103789534A (en) * | 2014-02-18 | 2014-05-14 | 云龙县铂翠贵金属科技有限公司 | Method for enriching noble metals from high-sulfur material |
| CN103805771A (en) * | 2014-02-25 | 2014-05-21 | 郭世宏 | Method for producing iron from sulfuric acid residue |
| CN105886689A (en) * | 2016-05-03 | 2016-08-24 | 重庆大学 | Pellet coating material and anti-bonding method in metalized roasting process |
| CN106566923A (en) * | 2016-10-28 | 2017-04-19 | 江苏省冶金设计院有限公司 | Comprehensive utilization method of arsenic-contained iron ore and red mud |
| CN108251637A (en) * | 2018-01-30 | 2018-07-06 | 华北理工大学 | A kind of method of harmful element in oxidizing roasting curing process copper ashes |
| CN108251637B (en) * | 2018-01-30 | 2019-11-22 | 华北理工大学 | A kind of method of harmful element in oxidizing roasting curing process copper ashes |
| CN109482611A (en) * | 2018-11-14 | 2019-03-19 | 铜陵有色金属集团股份有限公司 | The non-pollution processing method of the slugging containing pozzuolite |
| CN113637842A (en) * | 2021-08-16 | 2021-11-12 | 中南大学 | Double-layer pellet pelletizing system |
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| CN1069701C (en) | 2001-08-15 |
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