CN103861725B - The sorting process technique of gangue full resource utilization - Google Patents
The sorting process technique of gangue full resource utilization Download PDFInfo
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Abstract
The sorting process technique of gangue full resource utilization, comprises coal and troilite gravity separation and coal and the flotation of lime-ash grinding, the sorting of raw ore primary fragmentation trapezoidal washbox I is obtained cleaned coal I, chats I and troilite material; Chats I and the second-time breakage of troilite material are obtained smart troilite I, chats II and mine tailing I through trapezoidal washbox II sorting; Smart troilite II, chats III and mine tailing II is obtained by selected for chats II; Mine tailing I and mine tailing II grinding are made ore pulp, roughly select and obtain concentrate I ＇ and chats I ＇, concentrate I ＇ is selected obtains concentrate II ＇ and chats II ＇, chats I ＇ scans and obtains final tailings and chats III ＇, turned back to out together with chats III ＇ by chats II ＇ in ore grinding slurry, concentrate II ＇ is selected obtains floatation clean coal and chats IV ＇.Sorting product of the present invention is without discarded object, and troilite and coal all reach corresponding index requirement, and in lime-ash raw material, carbon content, sulfur content also meet calcareous addition of volcano technical requirement, three-waste free discharge in sorting process.
Description
Technical field
The invention belongs to gangue technical field, the sorting process technique of particularly a kind of gangue full resource utilization.
Background technology
Gangue is the solid waste of discharging in coal mining process and coal washing process.China's raw coal output in 2012 reaches 36.5 hundred million tons, gangue generation about 6.8 hundred million tons (National Bureau of Statistics of the People's Republic of China. People's Republic of China's national economy and social development statistical communique [EB/OL] in 2012. [2013-02-22] .http: //news.xinhuanet.com/politics/2013-02/23/c_114772758.htm), within 2012, gangue comprehensive utilization ratio is only the National Development and Reform Commission of the 62.2%(People's Republic of China (PRC). and Chinese Resources comprehensive utilization annual report (2012) [EB/OL]. [2013-04-09] .http: //district.ce.cn/zt/zlk/bg/201304/09/t20130409_24275052_3. shtml).Containing troilite, coal, clay mineral etc. in gangue, a large amount of discarded gangue not only covers soil, waste resource, and the dust of coal gangue hill and troilite weathering spontaneous combustion very easily occurs cause serious threat to environment.
Existing coal gangues automation selection treatment technology, be one or both valuable materials of sorting from gangue, mainly coal and troilite, then abandon lime-ash, forms new solid waste.The method of coal gangues automation selection has gravity separation method and floatation, gravity separation method according to coal lighter than tailings density sort condition, gangue is crushed to-10mm granularity, utilizes the gravity beneficiation equipment such as jigging machine, shaking table, sub-elect low-density coal product.Flotation is larger than the contact angle of tailings according to coal, and the feature that hydrophobicity is strong, is ground to-200 orders by colliery powder, and with kerosene or diesel oil for collecting agent, 2# oil (terpenic oil) is foaming agent, and lime or waterglass are adjusting agent, obtains coal product with direct flotation foam.The gravity separation technique of coal is simple, processing charges is low, but in discharge tailings, residual coal carbon content is high, and the rate of recovery is low; Although and residual coal is few in floatation tailings, need ore grinding and the flotation of several roads, complex process, processing charges are high.Two kinds of method for separating all do not sub-elect troilite, no matter it is present in coal product or tailings, all can reduce the quality of material.In two kinds of method combined sorting gangues, the technique of coal, has no bibliographical information.
The sorting of troilite also has gravity separation and flotation two kinds of methods, gravitational method be according to troilite density large sort condition, gangue is crushed to-3mm granularity, utilizes the gravity beneficiation equipment such as jigging machine, shaking table, sub-elect highdensity troilite product.The ore beneficiation of troilite is because troilite floatability is fabulous, is easy in the ordinary course of things and the collecting agent of sulfide mineral-xanthate generation surface reaction, generates double xanthate and hydrophobic.In gangue, the floatability of coal and troilite is close, and adopt floatation to be difficult to realize better separation, and cost is high, reality adopts gravity ore dressing method more.
From gangue, successively extract the method [patent No. CN101890395A] of troilite and coal, add lime adjusting agent, alcohol foaming agent, 2# oil is collecting agent, first extracts troilite; Then in Tailings Slurry, copper sulphate adjusting agent is added, with 2# oil for collecting agent extracts coal again.Equally because the floatability of coal in gangue and troilite is close, the overall recovery of troilite and coal is low (50%), and coal product caloric value is low, whole raw material need fine grinding and also need that medicament kind is many, consumption greatly, processing charges is high.Existing coal gangues automation selection treatment technology is paid close attention to not to grey slag ingredient and utilizability thereof, lime-ash is as the raw material (need through calcining and activating process) of cement mixture or concrete admixture, coal and troilite are harmful components wherein, content must be controlled in certain limit and could use, existing gangue treatment process often lime-ash because of carbon content high and discarded.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of sorting process technique of gangue full resource utilization, can be troilite, coal and lime-ash three kinds of products by coal gangues automation selection, sorting process and final products be without the discharge of waste gas, waste water and waste residue.
To achieve these goals, the technical solution used in the present invention is:
The sorting process technique of gangue full resource utilization, comprises coal and troilite gravity separation and coal and the flotation of lime-ash grinding, specifically comprises the steps:
Step 1, coal and troilite gravity separation
Step 1.1, by raw ore primary fragmentation to below particle diameter 5mm, obtains cleaned coal I, chats I and troilite material with trapezoidal washbox I sorting;
Step 1.2, the chats I step 1.1 obtained and the second-time breakage of troilite material, to below particle diameter 1mm, obtain smart troilite I, chats II and mine tailing I through trapezoidal washbox II sorting;
Step 1.3, chats II table concentration step 1.2 obtained, obtains smart troilite II, chats III and mine tailing II, and chats III returns trapezoidal washbox II and carries out sorting;
Step 2, coal and the flotation of lime-ash grinding
Step 2.1, by step 1 gained mine tailing I and mine tailing II, with wet milling machine grinding, makes the ore pulp of-200 order >=90%, joins in tank diameter;
Step 2.2, adds lime and sodium metasilicate in the ore pulp in tank diameter, addition is 4000 grams of/ton of siccatives and 1000 grams of/ton of siccatives, then stirs 5min; Add kerosene again, addition is 300 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 200 grams of/ton of siccatives, then stirs 3min, roughly selects 6min afterwards, obtains concentrate I ＇ and chats I ＇;
Step 2.3, adds kerosene in concentrate I ＇, and addition is 300 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 200 grams of/ton of siccatives, then stirs 3min; Selected 9min afterwards, obtains concentrate II ＇ and chats II ＇;
Step 2.4, adds lime and sodium metasilicate in chats I ＇, and addition is 2000 grams of/ton of siccatives and 1000 grams of/ton of siccatives, then stirs 5min; Add kerosene again, addition is 150 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 100 grams of/ton of siccatives, then stirs 3min, scans 5min afterwards, obtains final tailings and chats III ＇, is turned back to out by chats II ＇ in ore grinding slurry together with chats III ＇;
Step 2.5, adds kerosene in concentrate II ＇, and addition is 150 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 100 grams of/ton of siccatives, then stirs 3min; Selected 6min afterwards, obtains floatation clean coal and chats IV ＇, is turned back to by chats IV ＇ in concentrate I ＇; Wherein floatation clean coal index request is that sulfur content is less than 1%, and caloric value is greater than 21MJ/kg.
In described step 1.1, the requirement if the sulfur content of cleaned coal I and caloric value can touch the mark: sulfur content is less than 1%, and caloric value is greater than 21MJ/kg; Then it can be used as final product of coal, otherwise one-level gravity separation of connecting again is until reach These parameters requirement.
In described step 1.3, if smart troilite II grade does not reach technical requirement: sulfur content is greater than 30%; Then again carry out selected until up to standard with shaking table.
Compared with prior art, the present invention is directed to existing coal gangues automation selection treatment process and produce waste discharge, processing cost is high, the problem that sorted product quality is low, is the comprehensive sorting process of a kind of economic and practical gangue.
Tool has the following advantages:
(1) coal gangues automation selection product is without discarded object, all be converted into the industrial products or raw material that can directly utilize, troilite and coal two kinds of products reach corresponding index requirement, in lime-ash raw material, carbon content, sulfur content also meet calcareous addition of volcano technical requirement, three-waste free discharge in sorting process.
(2) by Fuzzy Optimization, the sorting cost of product selecting processing cost, particularly coal is reduced.
Accompanying drawing explanation
Fig. 1 is coal of the present invention and troilite gravity separation process flow diagram.
Fig. 2 is coal of the present invention and lime-ash flotation process schematic diagram.
Detailed description of the invention
Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
Process technology scheme of the present invention is divided into: coal and troilite gravity separation and coal and lime-ash grinding flotation two parts.
Wherein, as shown in Figure 1, concrete steps are as follows for the Treatment technique for processing of coal and troilite gravity separation:
1) gangue raw ore primary fragmentation is to below 5mm, cleaned coal I, chats I, troilite material is obtained with trapezoidal washbox I sorting, if the sulfur content of cleaned coal I and caloric value can touch the mark, (sulfur content is less than 1% in requirement, caloric value is greater than 21MJ/kg), then as final product of coal, otherwise one-level gravity separation of connecting again obtains final product of coal.
2) by 1) in obtain chats I, troilite material all through second-time breakage to below 1mm, obtain smart troilite I, chats II, mine tailing I through trapezoidal washbox II sorting.
3) by 2) in chats II table concentration that obtains, obtain smart troilite II, chats III, mine tailing II, if smart troilite II grade does not reach technical requirement (sulfur content is greater than 30%), can again carry out selected with shaking table.Chats III returns trapezoidal washbox II and carries out sorting.
4) mine tailing I, mine tailing II are as the raw material of coal, grey slag flotation.
Above-mentioned coal and troilite gravity separation are grade, and separating effect is good.
As shown in Figure 2, concrete steps are as follows for the Treatment technique for processing of coal and the flotation of lime-ash grinding:
1) by desulfurization mine tailing (mine tailing I, mine tailing II) wet milling machine grinding, make the ore pulp of-200 order >=90%, join in tank diameter.
2) add lime and sodium metasilicate in the ore pulp in tank diameter, addition is 4000 grams of/ton of siccatives and 1000 grams of/ton of siccatives, then stirs 5min; Add kerosene again, addition is 300 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 200 grams of/ton of siccatives, then stirs 3min, roughly selects 6min afterwards, obtains concentrate I ＇ and chats I ＇;
3) in concentrate I ＇, add kerosene, addition is 300 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 200 grams of/ton of siccatives, then stirs 3min; Selected 9min afterwards, obtains concentrate II ＇ and chats II ＇.
4) in chats I ＇, add lime and sodium metasilicate, addition is 2000 grams of/ton of siccatives and 1000 grams of/ton of siccatives, then stirs 5min; Add kerosene again, addition is 150 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 100 grams of/ton of siccatives, then stirs 3min, scans 5min afterwards, obtains final tailings and chats III ＇, is turned back to out by chats II ＇ in ore grinding slurry together with chats III ＇.
5) in concentrate II ＇, add kerosene, addition is 150 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 100 grams of/ton of siccatives, then stirs 3min; Selected 6min afterwards, obtains floatation clean coal and chats IV ＇, is turned back to by chats IV ＇ in concentrate I ＇; Wherein floatation clean coal index request is that sulfur content is less than 1%, and caloric value is greater than 21MJ/kg.
Above-mentioned coal and the flotation of lime-ash grinding are micron order, and flotation effect is good.
In above-mentioned process implementing, lime, sodium metasilicate are adjusting agents, and kerosene is collecting agent, and 2# oil is foaming agent.
The invention has the advantages that (1) coal is with gravity treatment and flotation combined sorting, not only make carbon content in final lime-ash very low, guarantee the quality of its volcano grey matter, and reduce the quantity of flotation material, reduce processing cost (gravity treatment cost is 1/3 ~ 1/5 of flotation).(2) before flotation, have selected troilite with gravity treatment, not only significantly reduce the sulfur content of coal and final lime-ash, and obtain troilite product (-1mm monomer or rich intergrowth troilite degree of dissociation more than 95%) in the most effective low cost mode.
Claims (3)
1. the sorting process technique of gangue full resource utilization, is characterized in that, comprises coal and troilite gravity separation and coal and the flotation of lime-ash grinding, specifically comprises the steps:
Step 1, coal and troilite gravity separation
Step 1.1, by crushing raw ore to below particle diameter 5mm, obtains cleaned coal I, chats I and troilite material with trapezoidal washbox I sorting;
Step 1.2, the chats I step 1.1 obtained and troilite material are crushed to below particle diameter 1mm, obtain smart troilite I, chats II and mine tailing I through trapezoidal washbox II sorting;
Step 1.3, chats II table concentration step 1.2 obtained, obtains smart troilite II, chats III and mine tailing II, and chats III returns trapezoidal washbox II and carries out sorting;
Step 2, coal and the flotation of lime-ash grinding
Step 2.1, by step 1 gained mine tailing I and mine tailing II, with wet milling machine grinding, makes the ore pulp of-200 order >=90%, joins in tank diameter;
Step 2.2, adds lime and sodium metasilicate in the ore pulp in tank diameter, addition is 4000 grams of/ton of siccatives and 1000 grams of/ton of siccatives, then stirs 5min; Add kerosene again, addition is 300 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 200 grams of/ton of siccatives, then stirs 3min, roughly selects 6min afterwards, obtains concentrate I ＇ and chats I ＇;
Step 2.3, adds kerosene in concentrate I ＇, and addition is 300 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 200 grams of/ton of siccatives, then stirs 3min; Selected 9min afterwards, obtains concentrate II ＇ and chats II ＇;
Step 2.4, adds lime and sodium metasilicate in chats I ＇, and addition is 2000 grams of/ton of siccatives and 1000 grams of/ton of siccatives, then stirs 5min; Add kerosene again, addition is 150 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 100 grams of/ton of siccatives, then stirs 3min, scans 5min afterwards, obtains final tailings and chats III ＇, is turned back to out by chats II ＇ in ore grinding slurry together with chats III ＇;
Step 2.5, adds kerosene in concentrate II ＇, and addition is 150 grams of/ton of siccatives, then stirs 5min; Add foaming agent again, addition is 100 grams of/ton of siccatives, then stirs 3min; Selected 6min afterwards, obtains floatation clean coal and chats IV ＇, is turned back to by chats IV ＇ in concentrate I ＇; Wherein floatation clean coal index request is that sulfur content is less than 1%, and caloric value is greater than 21MJ/kg;
Described foaming agent is 2# oil.
2. the sorting process technique of gangue full resource utilization according to claim 1, is characterized in that, in described step 1.1, and the requirement if the sulfur content of cleaned coal I and caloric value can touch the mark: sulfur content is less than 1%, and caloric value is greater than 21MJ/kg; Then it can be used as final product of coal, otherwise one-level gravity separation of connecting again is until reach These parameters requirement.
3. the sorting process technique of gangue full resource utilization according to claim 1, is characterized in that, in described step 1.3, if smart troilite II grade does not reach technical requirement: sulfur content is greater than 30%; Then again carry out selected until up to standard with shaking table.
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| CN105665122B (en) * | 2016-01-13 | 2017-12-01 | 华北理工大学 | The beneficiation method of troilite is reclaimed from gangue |
| CN106422716B (en) * | 2016-08-25 | 2023-07-21 | 昆明理工大学 | SO in copper extraction tailings desorption flue gas 2 And resource method and device |
| CN106746822B (en) * | 2016-12-05 | 2019-04-30 | 山西省生态环境研究中心 | A kind of chemical preparation process of activity gangue |
| CN106583415B (en) * | 2016-12-05 | 2019-09-13 | 山西省生态环境研究中心 | A kind of coal gangue component method of comprehensive utilization |
| CN106994394B (en) * | 2017-04-13 | 2020-01-10 | 中国地质科学院矿产综合利用研究所 | Method for reducing combustibility of high-sulfur coal gangue |
| CN110540886B (en) * | 2019-09-19 | 2020-09-08 | 福州普来尔电器有限公司 | Coal desulfurization stripping and slicing equipment |
| CN112570137A (en) * | 2020-05-20 | 2021-03-30 | 汕头市国富锆钛实业有限公司 | Beneficiation method for separating zirconite by using grading jigger |
| CN114247553B (en) * | 2021-12-03 | 2024-03-12 | 内蒙古科技大学 | Comprehensive separation method for gangue minerals |
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| CN101890395A (en) * | 2010-07-19 | 2010-11-24 | 贵州环科院环保产业有限公司 | Method for extracting coal and pyrite from coal gangues |
| CN102205267B (en) * | 2011-04-02 | 2013-04-17 | 谢秩勇 | Method for producing fine coal, pyrite concentrate and building sand by using high-sulfur coal refuses |
| CN102773153B (en) * | 2012-07-16 | 2013-08-21 | 中国矿业大学 | Lignite separation process |
| CN103143448B (en) * | 2013-04-03 | 2014-05-07 | 张京三 | Method for extracting float coal, ferrous sulfide and kaoline from gangue through flotation |
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