91 results about "Anthracite" patented technology

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

This invention discloses an automatic weighing and mixing device and a fully automated caking index tester and its testing method. The automatic weighing and mixing device includes an anthracite weighing and feeding mechanism, a test coal weighing and feeding mechanism, and a crucible rotation and lifting mechanism. The anthracite weighing and feeding mechanism includes a first feeding and weighing mechanism and an anthracite feeding mechanism. The test coal weighing and feeding mechanism includes a second feeding and weighing mechanism and a test coal feeding mechanism. The crucible is located on the crucible rotation and lifting mechanism. The crucible rotation and lifting mechanism moves the crucible between the first feeding and weighing mechanism and the anthracite feeding mechanism to receive and weigh the anthracite. The crucible rotation and lifting mechanism also moves the crucible between the second feeding and weighing mechanism and the test coal feeding mechanism to receive and weigh the test coal. This invention achieves full automation of the testing process, has a simple structure, provides high accuracy in test results, and has high work efficiency.

The utility model discloses a sewage treatment multi -medium filter device relates to multi -medium filter device technical field, including filter box, the one side fixed connection of filter box has the water inlet pipe, the inside of filter box is provided with from top to bottom in proper order anthracite layer, quartz sand layer and garnet layer, the mechanism of washing and brushing, the mechanism of washing and brushing sets up on filter box, and the mechanism of washing and brushing is used for the cleaning of anthracite layer, quartz sand layer and garnet layer. The utility model discloses through the mechanism of washing and brushing can spray water and wash from below, drive cleaning brush body to brush and wash anthracite layer on the top simultaneously, make up the defect that top washing is not enough, make cleaning more sufficient and comprehensive, can utilize the loosening of the impurity that is jammed on the micropore on anthracite layer, quartz sand layer and garnet layer with the knocking vibration effect of vibration auxiliary mechanism, so that being washed and brushed off by water or brush body, further make cleaning more sufficient and comprehensive, reduce residual.

This invention provides a method for evaluating the cost-effectiveness of semi-coke based on the effective calorific value of pulverized coal, relating to the field of iron and steel metallurgy. First, a formula for calculating the effective calorific value of pulverized coal in a blast furnace is established. By calculating the heat released from incomplete combustion of carbon and deducting the heat absorbed by moisture decomposition, hydrocarbon cracking, ash slag formation, and desulfurization, an effective calorific value more consistent with the actual operating conditions of the blast furnace is obtained. Subsequently, this effective calorific value is divided by the injection cost to construct a cost-effectiveness index. By calculating and comparing the cost-effectiveness index of the target fuel combination after semi-coke partially replaces anthracite with the benchmark combination cost-effectiveness index, the economic viability of semi-coke substitution can be accurately determined, and the critical price or price range for cost-effective semi-coke can be directly calculated. This invention overcomes the shortcomings of traditional evaluation methods that are detached from the actual thermal environment of the blast furnace, providing a scientific and quantitative decision-making basis for fuel procurement and coal blending optimization.

The invention discloses a method for blocking the long range of anthracite-based hard carbon microcrystals by using mechanical ball milling, which comprises the following steps: 1, under the protection of inert atmosphere, heating anthracite powder which is crushed and screened to a target particle size to a target temperature, and pre-carbonizing to obtain a carbonized material with an initial microcrystal structure; 2, taking the carbonized material with the initial microcrystal structure as a raw material, and breaking long-range carbon microcrystals in the carbonized material through a mechanical ball milling process to obtain a carbonized precursor formed by stacking small-size aromatic carbon clusters; 3, sequentially carrying out acid pickling treatment and water washing treatment on the carbonized precursor, and then carrying out drying treatment; and 4, under the protection of inert atmosphere, carrying out high-temperature carbonization treatment on the dried product to obtain the anthracite-based hard carbon with short-range ordered carbon microcrystals. According to the invention, the anthracite which is wide in source and low in cost is directly used as a raw material, and the directional construction of short-range ordered microcrystals in the hard carbon negative electrode and the remarkable improvement of the rate capability of the battery can be realized through a simple mechanical ball-milling process capable of realizing large-scale production.

The invention relates to the technical field of coal conveying, in particular to a blanking device and unblocking structure for anthracite conveying, which comprises a belt conveying frame, a weight detection component mounted on the belt conveying frame, and a blanking hopper arranged above the end part of the belt conveying frame, a rotating baffle, a material distributing plate, a center stacking assembly and a pressing assembly are arranged in the falling hopper. When the center stacking assembly is used, coal can be conveyed to the middle of the conveying belt, the weights of the two sides of the conveying belt can be kept consistent, and discharging and conveying are stable. Through the arrangement of the pressing assembly, coal is prevented from leaking into the belt conveying frame from a gap between the belt conveying frame and the conveying belt through vibration, dust dissipation generated by vibration during conveying is reduced, and the service life of the discharging device is prolonged; and the crushing assembly and the vibration motor are arranged, so that the automatic unblocking effect can be achieved, the impact of coal on the conveying belt can be reduced through the crushing assembly and the material distributing plate, and the conveying belt is protected.

The invention discloses a method for producing a high-phosphorus-content calcium magnesium phosphate fertilizer by using an industrial byproduct magnesium ammonium phosphate, which comprises the following steps: drying and screening magnesium ammonium phosphate, adding phosphorite, dolomite or serpentine and coke or anthracite, feeding the materials into a smelting furnace according to a ratio, melting and smelting at a high temperature, blowing air or oxygen by an air blower at the smelting temperature of 1400-1600 DEG C for 2-3 hours, and cooling to room temperature to obtain the high-phosphorus-content calcium magnesium phosphate fertilizer. The smelting time is 0.5-4 hours, discharging molten slag from a slag opening of the smelting furnace, and carrying out water quenching to obtain the calcium magnesium phosphate fertilizer; gas generated in the process enters a hot-blast stove along with smelting furnace gas, at the moment, the temperature of a hearth of the hot-blast stove reaches 900-1000 DEG C due to gas combustion, and ammonia reacts with nitrogen oxide in the tail gas to obtain nitrogen and water, and reacts with sulfur dioxide to finally obtain ammonium bisulfate. According to the invention, resource utilization of the industrial byproduct magnesium ammonium phosphate can be realized, the calcium magnesium phosphate fertilizer with high phosphorus content can be obtained, and nitrogen oxides and sulfur dioxide in the tail gas in the production process of the calcium magnesium phosphate fertilizer can be more effectively removed.

The invention discloses a preparation method of an anthracite-based graphite negative electrode material, which comprises the following steps: placing anthracite in a reaction furnace, vacuumizing twice, introducing nitrogen, keeping the nitrogen atmosphere, heating to 350-450 DEG C, then switching to hydrogen, keeping the temperature for 4-12 hours in the hydrogen atmosphere, and finally switching to nitrogen for natural cooling to obtain pretreated anthracite; and mixing the pretreated anthracite with 1-3wt% of a catalyst, and carrying out a high-temperature catalytic graphitization reaction to obtain the anthracite-based graphite negative electrode material. The anthracite is pretreated, so that the crosslinking effect of oxygen and sulfur in the anthracite on a carbon layer is effectively avoided, and the breakage of a side chain in the anthracite is promoted, so that residual carbon is more likely to be represented as pure side-chain-free aromatic hydrocarbon, and the internal structure of the anthracite is more easily and directionally arranged under the action of a catalyst; pores are formed in the surfaces of anthracite particles, so that permeation of the catalyst in the anthracite is enhanced, the catalytic effect is enhanced, and the catalytic graphitization effect is improved while the dosage of the catalyst is reduced.

The utility model discloses an integrated water purifier for surface water treatment, which comprises a water purifier, the water purifier comprises a water purification tank, a reactor is arranged on the water purification tank, a filter tank is fixedly arranged in the water purification tank, a honeycomb filler layer is arranged at the top of the filter tank, the filter tank is communicated with the reactor, and an anthracite filter layer and a quartz sand filter layer are arranged at the bottom of the water purification tank. A back flushing pipe is arranged below the quartz sand filter layer, one side of the back flushing pipe is communicated with a water outlet pipe and a driving pipe, the driving pipe is provided with a flow rate adjusting device and a water pump, sewage in the reactor reacts with a flocculating agent and then enters the filter box, and large particles in the sewage enter the filter box under the action of the honeycomb filler layer. Filtered water is further filtered by the quartz sand filter layer and the anthracite filter layer and then is discharged through the backwashing pipe and the water outlet pipe, siphon backwashing is changed into a water pump, backwashing strength is high, backwashing is thorough and clean, and the filter effect is good.

The invention relates to a method for judging the proportioning accuracy of a coal blending process, which belongs to the technical field of blast furnace ironmaking, and comprises the following steps: sampling bituminous coal and anthracite delivered from a stockpiling site at multiple points every day, and testing the components as a first analysis sample and a second analysis sample; carrying out normality test on the first analysis sample and the second analysis sample to obtain a test result; when the first analysis sample or the second analysis sample is in non-normal distribution, determining that the quality of the bituminous coal or the anthracite fluctuates severely or has a phenomenon of warehousing and ex-warehouse mixing; performing multi-point sampling on the raw coal entering the coal mill every day, and testing components as a third analysis sample; and carrying out normality test on the third analysis sample, and when the third analysis sample is in non-normal distribution, determining that an obvious proportion fluctuation or single coal mixing phenomenon exists in the period of time. According to the method, the analysis sample is subjected to normality test, so that the matching accuracy of the coal blending process can be effectively verified, and effective early warning on the matching abnormal condition of the coal blending process is realized.

The application discloses a preparation method and application of carbon nanosheet taking anthracite as raw material, relates to the technical fields of carbon materials and capacitors, and has the following technical points: A1: after being crushed and screened to a particle size less than 0.2 mm, the anthracite is deashed by using a mixed acid of HCl and HF, the mixed acid is in a proportion of 40% HCl, 10% HF and 50% deionized water, 1g of the anthracite is mixed with 15mL of the mixed acid, and then oscillation is carried out under ultrasonic waves for 1h, the ultrasonic frequency is set to 100kHz, then normal-temperature stirring is carried out for 24h, after filtration, multiple deionized water washing is carried out, and then drying is carried out at 60 DEG C for 12h to obtain deashed anthracite; and technical effects: the anthracite is deashed by ultrasonic treatment in the mixed acid, and after hydrothermal acidification in a sulfuric acid solution, acidified carbon with swollen coal organic macromolecules, loose structure, large specific surface area and rich oxygen-containing functional groups is obtained.

The present application relates to the technical field of cooling tower filtration, and discloses a cooling tower circulating water filter and recovery device, which comprises a base, the top of the base is fixedly connected with a pump, and the top of the base is fixedly connected with two sand filter tanks, sewage flows out from the water inlet of the sand filter tank, at this time, the water gap area formed by water inlet one and water inlet two is smallest, when backwashing, the water gap area formed by water inlet one and water inlet two is increased, at this time, the quartz sand and anthracite coal stuck on the flow-through port lose the limitation and are impacted upward by water vapor, since water vapor continuously flows outwards, the quartz sand is difficult to flow into the fixed plate from the outside of the outer filter head, the problem that the filter head is blocked by the tiny quartz sand or anthracite coal, resulting in incomplete backwashing, is effectively prevented.

This invention provides a method for removing copper ash in short-kiln smelting, belonging to the field of non-ferrous metal smelting. The method provided by this invention enriches the copper element in the copper ash into matte as much as possible, thereby maximizing the copper recovery rate. The smelting process of this invention includes three stages: oxidation, reduction, and slag refining. In the oxidation stage, only copper ash is added, without any auxiliary materials; in the reduction stage, the auxiliary materials are pig iron filings and anthracite; in the slag refining stage, no auxiliary materials are added; the oxidation and reduction stages mainly release low-copper and low-lead materials, minimizing lead content in the furnace; the slag refining stage releases high-copper, low-lead matte and low-copper, low-lead tailings. This invention achieves copper enrichment and improves copper recovery rate by adjusting the existing smelting mode and feedstock without using a new smelting furnace, using a smaller amount of auxiliary materials, resulting in better smelting economic benefits.

The utility model discloses a multi-stage calcium impurity filtering device for industrial silicon smelting, relates to the technical field of silicon smelting and purification, and provides an integration scheme comprising a pressure vessel tank body, a gradient filtering layer, an air-water backflushing system and an intelligent control module aiming at the problems that the existing single-stage filtering calcium retention rate is low, a medium is easy to harden and equipment is seriously corroded. A water inlet pipe and a water outlet pipe are symmetrically arranged on the side wall of the tank body, an anthracite layer, a quartz sand layer, an aluminum oxide layer and a magnetite layer are arranged in the tank body from top to bottom and are separated by honeycomb-shaped stainless steel supporting partition plates with water through holes, and a sintered metal supporting plate is arranged at the bottom; a backwashing water outlet pipe is arranged at the top of the tank, a compressed air pipe is connected to the side wall, and a control system comprising a PLC, a calcium ion sensor and a pressure difference transmitter is arranged outside the tank. During working, liquid is intercepted, adsorbed and magnetically captured step by step through four-stage media, and the removal rate of calcium impurities is larger than or equal to 98.5%; in the backwashing stage, blockages are removed through 0.4 MPa gas-water mixed pulse, the backwashing period is prolonged to 12-15 hours, and the energy consumption is reduced by 40%.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for preventing a cold pressing block from bursting and bonding in the carbonization process. The method comprises the following steps: mixing iron ore powder, bituminous coal, anthracite and an adhesive in proportion, heating, and carrying out cold press molding to prepare a cold press block; the method comprises the following steps: spraying a composite anti-sticking agent solution mainly comprising desulfurized gypsum and lignin on the surface of a cold-pressed block, sequentially heating in a nitrogen atmosphere, and carrying out multi-stage carbonization treatment to finally obtain a composite iron coke product. By optimizing the heating system and innovatively adopting the desulfurized gypsum-based composite anti-sticking agent, the problems of cracking and bonding of the cold-pressed block in the carbonization process are remarkably inhibited, the yield, the mechanical strength and the process efficiency are greatly improved, high-value utilization of industrial solid wastes is realized, and the method has the advantages that the raw materials are easy to obtain, the method is green and environment-friendly, the process is simple and convenient, and the like. And the practical application requirements of blast furnace ironmaking production are met.

This utility model discloses a MET composite ecological treatment component, including a box and, from top to bottom, a layer of anthracite, a layer of quartz sand, a layer of magnetite sand, an activated carbon layer, and an adsorption chamber arranged in sequence within the box. Sliding grooves are provided on the left and right sides of the inner wall of the box, and sliding strips are provided on both sides of the adsorption chamber, slidingly engaged within the sliding grooves. An openable side door is also provided on the front side of the box for the adsorption chamber to slide out of the box. The adsorption chamber includes several concentrically arranged annular drainage zones and annular adsorption zones. The annular drainage zone includes several circumferentially arranged UPVC porous pipes, the upper end of which is connected to the outlet of the inlet hopper, while the lower end is closed. Several drainage holes are provided on the sidewalls of the UPVC porous pipes. The annular adsorption zone includes several circumferentially arranged lanthanum-loaded resin adsorption columns that adsorb and separate phosphate ions from the wastewater flowing out of the drainage holes.

This invention provides a production process for the tiered utilization and comprehensive conversion of low-calorific-value anthracite. It employs a precise separation technology combining heavy media separation and jigging to separate the low-calorific-value anthracite into three grades of coal and washed gangue. Grade I coal undergoes deep deashing, segmented heat treatment, and phosphorus doping modification to prepare lithium-ion battery anode materials. Grade II coal is processed using a low-temperature activation process with a composite activator to prepare high-end activated carbon. Grade III coal is processed using a solvent extraction-chemical modification route to prepare carbon-based new materials. The washed gangue is used for circulating fluidized bed combustion power generation. Simultaneously, a wastewater, waste gas, and solid waste co-treatment system is established. This invention can improve the comprehensive utilization rate of resources, reduce pollutant emissions, achieve clean, high-value, and zero-waste utilization throughout the entire process, and form a coal-carbon materials-new energy industrial chain. It yields significant economic and environmental benefits and is suitable for regions rich in low-calorific-value anthracite resources.

The invention discloses a preparation method and application of coal-based biochar. Comprising the following steps: washing anthracite until the pH is neutral, and sequentially drying and sieving; placing the sieved anthracite in the activation solution for standing; after standing, drying the anthracite; the anthracite is placed in a heating furnace to be heated for the first time, and first heating is carried out; heating for the second time after the first heating is finished, and heating for the second time; and washing the anthracite heated for the second time until the pH value is 6.5-7.5, and then sequentially drying, crushing and sieving to obtain the coal-based biochar. According to the coal-based biochar, a layer of compact and stable passivation film can be constructed on the surface of pyrite, contact between water, dissolved oxygen and various positive ions and the surface of mineral is effectively blocked, and therefore the way of oxidation reaction is cut off from the source.

This invention relates to the field of red mud treatment technology, specifically disclosing a method for comprehensive treatment of red mud using a blast furnace process. The method includes: mixing red mud, manganese ore powder, binder, and anthracite, and pressing them into carbon-containing raw material pellets; sintering the carbon-containing raw material pellets, then crushing, screening, and granulating them to obtain carbon-containing clinker pellets; mixing the carbon-containing clinker pellets, flux, and coke, and then feeding them into a blast furnace for reduction smelting at 1200-1350℃; followed by slag-iron separation to obtain manganese-rich slag and pig iron. This invention, by mixing red mud and manganese ore powder to prepare carbon-containing pellets and then smelting them in a blast furnace, utilizes the difference in reduction potential between iron and manganese at different temperatures for selective reduction. This allows iron to be preferentially reduced into the metallic phase, while manganese remains in the slag phase as MnO. This achieves simultaneous and efficient recovery of iron resources from red mud and manganese resources from manganese ore, completely solving the problem of traditional processes only extracting a single element (iron) and causing secondary pollution in the tailings, significantly improving the comprehensive utilization rate of resources.

The invention relates to metallurgical technologies, and more particularly to the treatment of zinc-containing electric arc furnace dust using the Waelz process. The technical result is achieved in that the reduction process is carried out under controlled addition of anthracite, permitting the complete combustion of carbon in the reduction process, optimal rotation of the furnace, and also a controlled supply of CaO to obtain the desired slag basicity. A maximally efficient reduction process is achieved in the furnace, with the complete combustion of carbon, the basicity of the slag is controlled in addition to the fluidity thereof for complete removal, and a completely closed and safe cycle is provided which makes it possible to obtain waelz oxide without the uncontrolled release of heavy metals, such as mercury, dioxins and furans, and Cl and SOx gases into the atmosphere, thus rendering the present technology completely environmentally friendly.

The application discloses a preparation method and application of a multi-component non-metal element modified anthracite-based carbon negative electrode material, and belongs to the technical field of sodium ion battery negative electrode materials. After being ball milled and screened and impurity-removed by acid pickling, anthracite is pre-oxidized, mixed with ammonium chloride, ball milled, and then subjected to low-temperature (less than or equal to 500 DEG C) heat treatment in an inert atmosphere to obtain a nitrogen-chlorine-oxygen co-doped anthracite material, and finally subjected to secondary low-temperature heat treatment in an inert atmosphere containing a sulfur (or selenium) source to obtain a nitrogen-chlorine-oxygen-sulfur (selenium) doped anthracite-based carbon negative electrode material. The application effectively improves the discharge specific capacity and rate performance of the coal-based carbon material by combining the regulation of various non-metal elements with low-temperature heat treatment. The preparation method is simple and controllable, the raw materials are widely available and low in cost, and the method is suitable for batch production and has a good development prospect in the field of electrode material preparation or energy storage application (such as sodium ion batteries).

The invention discloses a primary air powder pipeline segmented electromagnetic heating system for deep peak regulation of an anthracite unit, which comprises an air pipe main body, the air pipe main body comprises an inner pipe and an outer pipe, the outer pipe is sleeved outside the inner pipe, and an interlayer is arranged between the inner pipe and the outer pipe; the electromagnetic heating system comprises a first electromagnetic coil and a second electromagnetic coil; the first electromagnetic coil and the second electromagnetic coil are both connected with the electric control system, and the electric control system is used for controlling the first electromagnetic coil and the second electromagnetic coil to be powered on alternately; the temperature monitoring system is mounted in the inner pipe; the terminal control system is used for integrally controlling the operation of the device; wherein a pressure relief hole is formed in the air pipe main body. According to the invention, two groups of electromagnetic coils which are arranged in sections are adopted for alternate heating and are matched with multi-point temperature monitoring along the way, so that accurate partitioned heat compensation of an air-powder mixture is realized, and the problem of low-load combustion delay caused by the characteristics of low volatile component and high ignition temperature of anthracite is solved.

The invention discloses a selective crushing, dissociation and separation method for anthracite. Comprising the following steps: 1) performing 0.1 mm first screening on crushed anthracite, performing ball milling on the 0.1 mm oversize part, performing 0.25 mm screening on the ground ore pulp, performing ball milling on the 0.25 mm oversize product again, performing second screening on the undersize product through a 0.1 mm screen, performing separate treatment on the oversize of the secondary screening, and performing combined treatment on the undersize of the secondary screening and the undersize of the primary screening; (2) oversize products obtained after secondary screening are subjected to gravity separation; and 3) carrying out flotation separation on a product obtained by combining undersize products obtained by the secondary screening and the primary screening. According to the method provided by the invention, the anthracite is moderately ground and dissociated to separate out easily-ground components and difficultly-ground components, the easily-ground fine-grain components are subjected to flotation, and the difficultly-ground coarse-grain components are subjected to reselection, so that the grinding energy consumption is reduced; and the load and reagent consumption in the flotation process are reduced, competitive interference among different floatable components is reduced, and the foam quality is more stable.

The application provides a high-rate hard carbon material based on anthracite, a preparation method, application and battery thereof. The preparation method comprises the following steps: (1) submicron anthracite particles are etched, then mixed with an activating agent, a transition metal source A and a solvent to prepare a slurry, and the slurry is spray granulated to prepare composite particles; (2) a mixed solution containing the composite particles and a transition metal source B is mixed and impregnated, and then dried to obtain transition metal double-doped composite particles; (3) under the protection of an inert gas, the transition metal double-doped composite particles are precalcined and calcined in sequence to obtain the high-rate hard carbon material based on anthracite. The process has low raw material cost and simple preparation process, the obtained high-rate hard carbon material based on anthracite has compact structure, high closed pore content, excellent electrical conductivity, excellent cycle stability and rate performance, and high initial coulomb efficiency.

This invention discloses a NOx control method for a chain grate rotary kiln based on multi-source fuel utilization. This method, targeting different levels of environmental warnings and ultra-low emission requirements, first establishes a solid fuel combustion characteristic database including anthracite, bituminous coal, and their blends based on industrial analysis, elemental analysis, and thermogravimetric experiments. Simultaneously, it employs CFD numerical simulation technology, coupling an Eulerian-Lagrange multiphase flow model and a P-1 radiation model, to analyze the flow field and NOx formation patterns under pulverized coal and natural gas co-firing conditions. Upon receiving control commands, it calculates the inlet concentration threshold based on the real-time efficiency of the denitrification system, intelligently recommends the optimal fuel ratio using the multi-source database, and outputs corresponding kiln tail temperature, combustion air volume, and raw material structure control parameters. This invention, through a dual approach of "experimentation + simulation," achieves the suppression of fuel-type and thermal NOx formation at the source, meeting differentiated environmental indicators while ensuring stable production.

The utility model provides a kind of multi-stage multi-medium filtering device of coal gasification ash water, sealing tank body tank body is equipped with tank cover, discharge port, entry hole door, smokeless coal layer is installed inside, quartz sand layer;Water distribution system contains inlet pipe, inlet water tee valve, water distribution assembly, water distribution assembly is composed of main pipe section, radiation branch pipe and diffusion spray head, realize umbrella-shaped water distribution;Filtering system contains perforated partition, water collecting cavity, outlet pipe, outlet water tee valve, water collecting cavity is connected exhaust pipe and automatic exhaust valve;Backwash system contains compressed air branch pipe, anti-blocking baffle, outlet water tee valve second port is backwash inlet, inlet water tee valve second port is backwash drain outlet.The device can uniformly distribute water, efficiently filter, backwash conveniently, medium loading and unloading conveniently, ensure ash water treatment stable and efficient, improve filtering effect and device reliability.

An agglomerated composition of reduced iron fine / dust particles, a polymeric binder, a lime based fluxing agent and / or an additional source of carbon, such as biochar charcoal. The agglomerated compositions are able to effectively mimic the melting and chemical characteristics observed with traditional pig iron, DRI, HBI and anthracite additions in the electric arc furnace (EAF). The polymeric binder may be a low melting thermoplastic such as a low or high density polyethylene. The lime based fluxing agent may be a dolime composition.

The invention discloses a method for preparing an ultralow-ash clean coal product from anthracite coal slime. The method comprises the following steps: 1) carrying out liquid-phase ore grinding dissociation treatment on the anthracite coal slime; (2) adding a beneficiation reagent into the anthracite coal slime pulp, and carrying out multi-stage flotation to obtain clean coal; (3) carrying out liquid-phase ore grinding and dissociation pulping on the clean coal, and adding an alkaline agent and an inhibitor into ore pulp to carry out pulp mixing reaction, so as to obtain ore pulp; and (4) the ore pulp is subjected to multi-stage flotation, and ultralow-ash concentrate and tailings are obtained. According to the method, physical flotation and a chemical acid-alkali method are combined, the surface property difference of substances in ore pulp is increased, the flotation efficiency is improved, and ultra-low ash clean coal can be obtained; compared with the traditional anthracite coal slime treatment mode, the method provided by the invention is more efficient and environment-friendly, and is more consistent with the current situation and the environmental protection policy, meanwhile, low-value solid wastes are converted into ultra-low ash clean coal products, and high-quality green reutilization is realized.