CN113477680A - Environment-friendly dechlorination method for chlorine-containing dedusting ash - Google Patents

Environment-friendly dechlorination method for chlorine-containing dedusting ash Download PDF

Info

Publication number
CN113477680A
CN113477680A CN202110817383.1A CN202110817383A CN113477680A CN 113477680 A CN113477680 A CN 113477680A CN 202110817383 A CN202110817383 A CN 202110817383A CN 113477680 A CN113477680 A CN 113477680A
Authority
CN
China
Prior art keywords
chlorine
slurry
ash
filter
slurrying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110817383.1A
Other languages
Chinese (zh)
Inventor
曾凡波
殳哲君
林铖
陈小忠
王知学
刘喜华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zenith Steel Group Co Ltd
Zenith Steel Group Nantong Co Ltd
Original Assignee
Zenith Steel Group Co Ltd
Zenith Steel Group Nantong Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zenith Steel Group Co Ltd, Zenith Steel Group Nantong Co Ltd filed Critical Zenith Steel Group Co Ltd
Priority to CN202110817383.1A priority Critical patent/CN113477680A/en
Publication of CN113477680A publication Critical patent/CN113477680A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00Destroying solid waste or transforming solid waste into something useful or harmless
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D25/00Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12Filter presses, i.e. of the plate or plate and frame type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B5/00Operations not covered by a single other subclass or by a single other group in this subclass

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to an environment-friendly dechlorination method for chlorine-containing dedusting ash, which comprises two main systems: the method comprises the following steps of receiving and storing chlorine-containing dust removal ash, metering and blanking, stirring and slurrying concentrated solution, adding chemicals into the slurry, stirring and leaching, and performing multistage filter pressing to obtain high-concentration bittern-containing water and low-chlorine mud cakes; the dechlorination system adopted sequentially comprises chlorine-containing ash receiving and storing equipment, weighing and blanking equipment, stirring and slurrying equipment, slurrying liquid caching and heat tracing dosing stirring and leaching equipment, multi-stage filter pressing equipment, filter cake transferring equipment, eluate storing equipment, a matched pump pipe system and the like. The invention can realize the deep removal of CL from chlorine-containing dedusting ashMeanwhile, the problem of environmental pollution in the treatment process of the chlorine-containing ash is solved, and the treated ash is free from ash; solves the problem of different chlorine contentsThe economic dechlorination problem of the fly ash; solves the problems of clear liquid blockage and the like in the process of transferring chlorine-containing grey water washing slurry.

Description

Environment-friendly dechlorination method for chlorine-containing dedusting ash
Technical Field
The invention relates to the technical field of steel smelting, in particular to green treatment and cyclic efficient utilization of high-chlorine ash such as sintering electric field ash, blast furnace cloth bag ash and the like in the steel industry, and particularly relates to an environment-friendly dechlorination method for chlorine-containing dedusting ash.
Background
The sources of chloride ions in the steel industry are mainly divided into three types: the chlorine content in the iron-containing mineral powder accounts for the main part, and particularly the chlorine content in the imported mineral powder is higher; secondly, the iron and steel smelting slag is derived from various added solvent minerals in the processes of iron and steel smelting; meanwhile, a part of chloride ions are also brought by various coals and cokes in the smelting process.
The chlorine-containing substances mainly overflow in the form of various chlorides in the high-temperature smelting environment, and most of the chlorine-containing substances are enriched in various smoke dust and coal gas and are circularly enriched inside steel enterprises. The enrichment of such chlorine-containing substances has a bad influence on all the main production processes of the steel industry: firstly, various chlorine-containing dedusting ash blending sintering processes cause bonding and blocking of grate bars of a grate, the utilization coefficient of a sintering machine is greatly reduced, and the product quality is reduced; after the sintered ore with high chlorine content enters an iron-making process, chloride mainly exists in the form of potassium chloride and sodium chloride to bring alkali metal harm to a blast furnace, so that the sintered ore is pulverized, coke is degraded too quickly in an early stage, the air permeability of the blast furnace is reduced, the yield of the blast furnace is influenced slightly, the furnace condition is unsmooth even the nodulation and the corrosion of refractory materials of the blast furnace are caused seriously, and the service life of the blast furnace is shortened greatly; meanwhile, chlorides entering the coal gas have the characteristics of strong corrosivity and easy adhesion and caking, and cause serious damage to equipment in various procedures in the steel industry, such as corrosion of a gas pipeline, a gas boiler, a TRT or BPRT blade, blockage of a boiler tube bundle, unbalance of dynamic balance of TRT or BPRT blade adhesion and the like.
The main types of the chlorine-containing ash of iron and steel enterprises are blast furnace cloth bag ash and sintering electric field ash, wherein the chlorine content of the blast furnace cloth bag ash is generally 6-8%, the chlorine content of the sintering electric field ash is higher, and particularly the chlorine ion content in the sintering 3 and 4 electric field ash can reach 30-40%. At present, the blast furnace cloth bag ash is mainly matched with a sintering process to utilize about 20 percent of carbon element in the blast furnace cloth bag ash, and the treatment mode cannot avoid the harm of chlorine element; the sintering electric field ash is subjected to external treatment, a large amount of treatment cost needs to be paid out when the iron element is lost due to the treatment mode, and the treatment mode cannot be sustained along with the enhancement of the environmental protection management and control force.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides an environment-friendly dechlorination method for chlorine-containing dedusting ash, which aims to solve the problems of cyclic enrichment and great harm of the chlorine-containing ash in the steel industry.
The technical scheme adopted by the invention for solving the technical problems is as follows: an environment-friendly dechlorination method for chlorine-containing dedusting ash comprises the following steps:
s1, injecting chlorine-containing ash into a chlorine-containing ash bin by using compressed nitrogen;
s2, quantitatively feeding the chlorine-containing ash in the chlorine-containing ash bin into a chlorine-containing mortar slurrying tank through a screw quantitative feeder to form slurry liquid, wherein the solid content of the slurry liquid in the chlorine-containing mortar slurrying tank is controlled to be 20-30%, and the slurry liquid is stirred and aerated in the chlorine-containing mortar slurrying tank for 10-40min and then is pumped into a slurry liquid storage tank with a steam heat tracing function;
s3, pumping the slurry in the slurry storage tank into a first filter press for filter pressing, transferring the high-concentration salt-containing brine after filter pressing into a subsequent evaporation salt separation procedure for treatment through a brine tank, and allowing filter cakes after filter pressing to enter a first slurry barrel for slurry pressing through a first material guide funnel;
s4, pumping the slurry slurried in the first slurrying barrel into a second filter press through a slurry pump, pumping the salt-containing brine generated by filter pressing into a brine buffer tank and then into a chlorine-containing ash slurrying tank through a liquid transfer pump for use, and pumping the filter cake generated by filter pressing of the second filter press into the second slurrying barrel through a second material guide funnel to be mixed with new industrial water and then slurried again;
s5, pumping the slurry slurried in the second slurry barrel into a third filter press through a slurry pump, feeding the filter-pressed filtrate into a filtrate buffer tank, pumping the filtrate into the first slurry barrel through a liquid transfer pump for slurrying a filter cake generated by filter pressing of the first filter press, feeding a machine washing liquid into a machine washing liquid buffer tank, and conveying the filter cake generated by filter pressing of the third filter press into a belt conveyor below the third guide hopper to a subsequent process for treatment.
In the step S2, in order to reduce the difficulty of deep impurity removal of the salt-containing brine in the subsequent salt separation process, sodium carbonate or sodium sulfide is added into the chlorine-containing lime slurrying tank during the slurrying process, so as to promote the sedimentation of calcium and magnesium ions and heavy metal substances.
Further, the temperature of the slurry liquid in the slurry liquid storage tank is controlled to be 50-70 ℃, on one hand, the stability of the temperature of the slurry liquid in different seasons is ensured, and the CL in the slurry liquid is further improved-On the other hand, the damage of overhigh temperature of the slurry liquid to the filter cloth of the subsequent filter press is avoided.
The inner cavities of the first material guide funnel, the second material guide funnel and the third material guide funnel are all provided with metal grids, so that the whole filter cake after filter pressing falls onto the metal grids and is broken into small filter residues.
The invention has the beneficial effects that: the invention can realize deep removal of CL contained in chlorine-containing dedusting ash-Meanwhile, the problem of environmental pollution in the treatment process of the chlorine-containing ash is solved, no ash is found in the treated ash, the economic dechlorination problem of the dedusting ash with different chlorine contents is solved, and the problems of clear liquid blockage and the like in the material transferring process of the chlorine-containing ash water washing slurry are solved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic process flow diagram of the present invention.
In the figure: 1. the device comprises a suction and discharge tank car, 2. a chlorine-containing ash bin, 3. a nitrogen buffer tank, 4. a screw constant feeder, 5. a chlorine-containing ash slurrying tank, 6. a slurrying liquid storage tank, 7. a first filter press, 8. a brine tank, 9. a first material guide funnel, 10. a first slurrying barrel, 11. a second filter press, 12. a brine buffer tank, 13. a second material guide funnel, 14. a second slurrying barrel, 15. a third filter press, 16. a filtrate buffer tank, 17. a machine washing liquid buffer tank, 18. a third material guide funnel and 19. a belt conveyor.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Fig. 1 shows a process flow diagram of an environment-friendly dechlorination method for chlorine-containing fly ash, which comprises the following specific processes:
after the suction and discharge tank car 1 closely conveys the chlorine-containing ash to the area where the treatment device is located, compressed nitrogen is used for pumping into a chlorine-containing ash bin 2, and a nitrogen buffer tank 3 is arranged for ensuring the stability of the chlorine-containing ash conveying gas.
Quantitatively feeding chlorine-containing ash in the chlorine-containing ash bin 2 into a chlorine-containing ash pulping tank 5 through a screw quantitative feeder 4 to form pulping liquid, controlling the solid content of the pulping liquid in the chlorine-containing ash pulping tank 5 to be 25%, stirring and aerating the pulping liquid in the chlorine-containing ash pulping tank 5 for 30min, and pumping the treated pulping liquid to a pulping liquid storage tank 6 with a heat tracing function through the pulping liquid;
according to the difference of chlorine content of the slurry cached in the slurry storage tank 6, flexible multi-stage rinsing treatment can be performed, and according to the embodiment, the chlorine-containing ash is used as the reference of CL-The content is more than 20 percent, and three-stage rinsing treatment is adopted.
Pumping the slurry in the slurry storage tank 6 into a first filter press 7 for filter pressing, transferring the high-concentration salt-containing brine subjected to filter pressing into a subsequent process for treatment through a lower brine tank 8, and introducing a filter cake subjected to filter pressing into a first slurry barrel 10 for slurry preparation through a first material guide funnel 9, wherein the liquid used for slurry preparation is obtained from a filtrate generated by a subsequent third filter press 15;
slurry slurried in the first slurrying barrel 10 is pumped into a second filter press 11 through a slurry pump, salt-containing brine after filter pressing automatically flows into a brine buffer tank 12 below the second slurrying barrel, the salt-containing brine is pumped into a chlorine-containing ash slurrying tank 5 through a liquid transfer pump for slurrying, and filter cakes generated by filter pressing of the second filter press 11 enter a second slurrying barrel 14 right below the second slurrying barrel through a second material guide funnel 13 to be mixed with new industrial water for repulping again;
the slurrying liquid after slurrying in the second slurrying barrel 14 is pumped into a third filter press 15 through a slurry pump, the filter liquor after filter pressing enters a filtrate buffer tank 16 below the filter liquor after filter pressing and is pumped into a first slurrying barrel 10 through a liquid transfer pump, the filter liquor is used for slurrying filter cakes generated by filter pressing of a first filter press 7, and machine washing filtrate generated after filter pressing enters a machine washing liquid buffer tank 17 due to CL of the machine washing liquid-The lower part of the filter cake is used as machine washing supplementary liquid, the other part of the filter cake is used as filter cake pulp generated after filter pressing of the second filter press 11, and the filter cake generated by the third filter press 15 falls into a belt conveyor 19 below through a third material guide funnel 18 to be conveyed to a next procedure for treatment.
All possess the stirring function in above-mentioned chlorine ash slurrying jar 5, first slurrying bucket 10 and the second slurrying bucket 14, wherein chlorine ash slurrying jar 5 still possesses the function of adding sodium carbonate or sodium sulfide rinsing agent at the slurrying in-process to promote the subsidence of calcium magnesium ion, heavy metal matter, reduce the processing degree of difficulty that contains the salt brine degree of depth edulcoration.
The pulping liquid storage tank 6 with a proper volume is arranged before chlorine-containing mortar enters a filter pressing system after being pulped, the pulping liquid storage tank is matched with the model of a subsequent filter press, the flexible connection of the chlorine-containing mortar pulping process and the filter pressing process is ensured, the pulping liquid storage tank 6 is provided with a steam heat tracing function besides a conventional stirring function, the temperature of the pulping liquid can be controlled to be about 50-70 ℃ in the production process, on one hand, the stability of the temperature of the pulping liquid in different seasons is ensured, and the CL in the pulping liquid is further improved-On the other hand, the damage of overhigh temperature of the slurry liquid to the filter cloth of the subsequent filter press can be avoided.
First guide funnel 9, second guide funnel 13 and third guide funnel 18 all set up metal grating on their inside cavity wall except that embedded self-lubricating macromolecular material to make the monoblock filter cake after the filter-pressing fall and break into the fritter filter residue on the metal grating, guarantee this system's slurrying effect and follow-up belt transportation.
The dechlorination method is based on the CL in the chlorine-containing ash-The content is high and low, different pipelines can be selected to select first-stage washing, second-stage washing or third-stage washing, the first filter press 7, the second filter press 11 and the third filter press 15 used in the system all adopt plate and frame filter presses, and the last-stage filter press is the filter pressThe third filter press 15 has a belt washing function to ensure CL in the filter cake-The content meets the requirements of production indexes of the next procedure; the system can reach washing and dechlorinating effects on the dedusting ash with high chlorine content through multi-stage concentration slurrying and filter pressing procedures, and meanwhile, the CL is performed on the dedusting ash-The consumption of new water for each ton of chlorine-containing ash with the content of about 30-35 percent can be controlled to be 2.4-2.8t, and the water resource is saved.
The first filter press 7, the first material guide funnel 9, the first slurry barrel 10, the second filter press 11, the second material guide funnel 13, the second slurry barrel 14, the third filter press 15, the third material guide funnel 18 and the belt conveyor 19 are all vertically arranged according to a three-layer structure; the filter-pressing back filtrating of first pressure filter 7 flows automatically and gets into brine jar 8, and 11 filter-pressing back filtrating flows automatically and gets into brine buffer tank 12 of second pressure filter, and 15 filter-pressing back filtrating flows automatically and gets into filtrating buffer tank 16 and machine washing liquid buffer tank 17, can reduce the pump sending of filtrating through complicated pipeline from this, especially can effectively avoid filter-pressing back filtrating pipeline's jam problem under the circumstances of the damaged hourglass mud appears in the filter press filter bag.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (4)

1. An environment-friendly dechlorination method of chlorine-containing dedusting ash is characterized by comprising the following steps: the method comprises the following steps:
s1, injecting chlorine-containing ash into a chlorine-containing ash bin by using compressed nitrogen;
s2, quantitatively feeding the chlorine-containing ash in the chlorine-containing ash bin into a chlorine-containing mortar slurrying tank through a screw quantitative feeder to form slurry liquid, wherein the solid content of the slurry liquid in the chlorine-containing mortar slurrying tank is controlled to be 20-30%, and the slurry liquid is stirred and aerated in the chlorine-containing mortar slurrying tank for 10-40min and then is pumped into a slurry liquid storage tank with a steam heat tracing function;
s3, pumping the slurry in the slurry storage tank into a first filter press for filter pressing, transferring the high-concentration salt-containing brine after filter pressing into a subsequent evaporation salt separation procedure for treatment through a brine tank, and allowing filter cakes after filter pressing to enter a first slurry barrel for slurry pressing through a first material guide funnel;
s4, pumping the slurry slurried in the first slurrying barrel into a second filter press through a slurry pump, pumping the salt-containing brine generated by filter pressing into a brine buffer tank and then into a chlorine-containing ash slurrying tank through a liquid transfer pump for use, and pumping the filter cake generated by filter pressing of the second filter press into the second slurrying barrel through a second material guide funnel to be mixed with new industrial water and then slurried again;
s5, pumping the slurry slurried in the second slurry barrel into a third filter press through a slurry pump, feeding the filter-pressed filtrate into a filtrate buffer tank, pumping the filtrate into the first slurry barrel through a liquid transfer pump for slurrying a filter cake generated by filter pressing of the first filter press, feeding a machine washing liquid into a machine washing liquid buffer tank, and conveying the filter cake generated by filter pressing of the third filter press into a belt conveyor below the third guide hopper to a subsequent process for treatment.
2. The environmental protection dechlorination method of chlorine-containing dedusting ash as claimed in claim 1 is characterized in that: in step S2, sodium carbonate or sodium sulfide is added into the chlorine-containing lime slurry tank during the slurry process to promote the sedimentation of calcium and magnesium ions and heavy metal substances.
3. The environmental protection dechlorination method of chlorine-containing dedusting ash as claimed in claim 1 is characterized in that: in step S2, the temperature of the slurry in the slurry storage tank is controlled to be 50-70 ℃.
4. The environmental protection dechlorination method of chlorine-containing dedusting ash as claimed in claim 1 is characterized in that: the inner cavities of the first material guide funnel, the second material guide funnel and the third material guide funnel are all provided with metal grids, so that the whole filter cake after filter pressing falls onto the metal grids and is broken into small filter residues.
CN202110817383.1A 2021-07-20 2021-07-20 Environment-friendly dechlorination method for chlorine-containing dedusting ash Pending CN113477680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110817383.1A CN113477680A (en) 2021-07-20 2021-07-20 Environment-friendly dechlorination method for chlorine-containing dedusting ash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110817383.1A CN113477680A (en) 2021-07-20 2021-07-20 Environment-friendly dechlorination method for chlorine-containing dedusting ash

Publications (1)

Publication Number Publication Date
CN113477680A true CN113477680A (en) 2021-10-08

Family

ID=77941555

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110817383.1A Pending CN113477680A (en) 2021-07-20 2021-07-20 Environment-friendly dechlorination method for chlorine-containing dedusting ash

Country Status (1)

Country Link
CN (1) CN113477680A (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109133472A (en) * 2018-10-08 2019-01-04 丁仲军 Garbage flying ash resource utilization treatment process
CN109332347A (en) * 2018-08-31 2019-02-15 江苏天楹环保能源成套设备有限公司 A kind of waste incineration flying ash washing dechlorination method and its dechlorination system
CN111111274A (en) * 2020-01-15 2020-05-08 北京金隅琉水环保科技有限公司 Circulating gradient fly ash washing system and method
CN210586329U (en) * 2019-07-25 2020-05-22 浙江桃花源环保科技有限公司 Fly ash washing system with low water consumption
CN111375623A (en) * 2020-03-10 2020-07-07 上海宝叶冶金技术有限公司 Method for removing chlorine from fly ash
CN111411216A (en) * 2020-04-24 2020-07-14 苏州固利环保科技有限公司 Efficient dechlorination method for blast furnace cloth bag ash
CN111424168A (en) * 2020-04-23 2020-07-17 重庆赛迪热工环保工程技术有限公司 Water-washing dechlorination system and method for metallurgical precipitator dust
CN111530901A (en) * 2020-06-12 2020-08-14 重庆赛迪热工环保工程技术有限公司 Washing process of dust removing ash containing salt
CN112225370A (en) * 2020-09-01 2021-01-15 湖南博一环保科技有限公司 Water washing and heavy metal removing process suitable for steel mill fly ash
CN213134439U (en) * 2019-08-05 2021-05-07 北京中科国润环保科技有限公司 FWD system of flying dust dechlorination
CN112934912A (en) * 2021-01-26 2021-06-11 湖南青涟环保科技有限公司 Pretreatment method of waste incineration fly ash
CN113061735A (en) * 2021-03-30 2021-07-02 宝武集团环境资源科技有限公司 Zinc-containing dust treatment system and method based on water washing process

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109332347A (en) * 2018-08-31 2019-02-15 江苏天楹环保能源成套设备有限公司 A kind of waste incineration flying ash washing dechlorination method and its dechlorination system
CN109133472A (en) * 2018-10-08 2019-01-04 丁仲军 Garbage flying ash resource utilization treatment process
CN210586329U (en) * 2019-07-25 2020-05-22 浙江桃花源环保科技有限公司 Fly ash washing system with low water consumption
CN213134439U (en) * 2019-08-05 2021-05-07 北京中科国润环保科技有限公司 FWD system of flying dust dechlorination
CN111111274A (en) * 2020-01-15 2020-05-08 北京金隅琉水环保科技有限公司 Circulating gradient fly ash washing system and method
CN111375623A (en) * 2020-03-10 2020-07-07 上海宝叶冶金技术有限公司 Method for removing chlorine from fly ash
CN111424168A (en) * 2020-04-23 2020-07-17 重庆赛迪热工环保工程技术有限公司 Water-washing dechlorination system and method for metallurgical precipitator dust
CN111411216A (en) * 2020-04-24 2020-07-14 苏州固利环保科技有限公司 Efficient dechlorination method for blast furnace cloth bag ash
CN111530901A (en) * 2020-06-12 2020-08-14 重庆赛迪热工环保工程技术有限公司 Washing process of dust removing ash containing salt
CN112225370A (en) * 2020-09-01 2021-01-15 湖南博一环保科技有限公司 Water washing and heavy metal removing process suitable for steel mill fly ash
CN112934912A (en) * 2021-01-26 2021-06-11 湖南青涟环保科技有限公司 Pretreatment method of waste incineration fly ash
CN113061735A (en) * 2021-03-30 2021-07-02 宝武集团环境资源科技有限公司 Zinc-containing dust treatment system and method based on water washing process

Similar Documents

Publication Publication Date Title
CN101899338B (en) Coal-water slurry slurrying system and method for coal chemical industry
CN105728440A (en) Aluminum electrolytic cell overhaul dreg harmless treatment system and method
CN101972703A (en) Beneficiation method for recovering zinc, lead and silver from zinc leaching residue
CN103831165B (en) High containing arsenic gold cyanidation tailings method for innocent treatment
CN104843784A (en) Method and equipment for carrying out acidolysis in titanium white production by sulfuric acid process
CN102851414A (en) Treatment technique of blast furnace fly ash
CN201762297U (en) Complete set of manufacturing equipment for coal water slurry
CN105084786A (en) Lime slaking and chemical feeding device
CN103205772B (en) Method for producing electrolytic manganese dioxide
CN113477680A (en) Environment-friendly dechlorination method for chlorine-containing dedusting ash
CN106460090A (en) Manganese ore beneficiation process
CN210030829U (en) Iron-containing dust recycling system
CN204819925U (en) Joint pulping machine
CN208018759U (en) A kind of novel aluminum lime-ash screening process equipment
CN105170311B (en) Improve the washing germanium ore deposit method of the pyrometallurgical smelting rate of recovery
CN211848090U (en) Zinc-containing dust wet recovery system
CN107716131B (en) Grind grading and flotation carbon removal system
CN115337987A (en) Method for producing refractory hematite Fe25-50% direct-production steelmaking reduced iron
CN204637967U (en) Alkaline residue liquid apparatus for preparing desulphurizing agent
CN110218594B (en) System and method for preparing gasification type coal water slurry from high ash fusion point coal slurry
CN201316655Y (en) Wet ball mill with feeding carrier
CN110821558A (en) Preparation method of filling slurry in mine goaf
CN201785371U (en) Coal water slurry preparation system for coal chemical industry
CN208194536U (en) A kind of coal mine crossheading two stage crusher
CN209537329U (en) A kind of pressure ball equipment of carbide slag resource utilization

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20211008

WD01 Invention patent application deemed withdrawn after publication