131 results about "Anthracite" patented technology

The invention discloses an iron alloy electrode paste and a preparation process, and belongs to the technical field of electrode paste preparation, the iron alloy electrode paste comprises a composite aggregate system and a composite binder system, the composite aggregate system comprises the following components by mass: 40-60% of anthracite aggregate, 15-25% of artificial graphite flake, and 3-8% of silicon carbide whisker; the composite binder system comprises the following components in percentage by mass: 70-80% of medium-temperature modified coal pitch, 10-15% of furan resin and 5-10% of dispersion liquid containing nano boron carbide, and the composite binder system is combined with the composite aggregate system through a gradient permeation process to form a three-dimensional conductive network and an enhanced interface; the composite aggregate system and the composite binder system are optimally proportioned, and gradient permeation and gradient kneading processes are combined, so that the comprehensive performance of the electrode paste is remarkably improved, the thermal shock resistance is greatly improved and the linear shrinkage rate is reduced while low resistivity is maintained, the electrode paste is suitable for smelting ferroalloys such as silicomanganese and ferrochromium, and the service life is remarkably prolonged.

The invention discloses a high-aluminum limonite and specularite ore blending and sintering method which comprises the following steps: 1) preparing primary pre-blending powder: pre-blending high-aluminum limonite, specularite concentrate powder, iron oxide scale, limestone powder and anthracite powder to prepare the primary pre-blending powder with the water content of 6.5-7%; (2) preparing a uniformly mixed material: blending the primary pre-blended material powder obtained in the step (1) with high-silicon iron ore powder and hematite and limonite powder to prepare the uniformly mixed material; 3) sintering and burdening: burdening the uniformly mixed material obtained in the step 2) with limestone, dolomite powder, quicklime, solid fuel and return mine, and 4) controlling the components of the sintered ore as follows: 2.3-2.5% of Al2O3, 5.7-6.5% of SiO2, 8-8.5% of FeO and 1.85-2.5% of MgO. According to the invention, while 20-30% of the proportion of the discount ore silk road powder in the total uniformly mixed material is increased, the sintering cost is reduced by 20-42 yuan / ton, the drum strength of the sintered ore is greater than or equal to 78.5%, the return mine rate is less than or equal to 27%, and the RDI + 3.15 mm is greater than or equal to 63%.

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.

The invention discloses a multi-dimensional evaluation method of a blast furnace process extreme energy efficiency technology, and relates to the field of steel production energy efficiency evaluation. Aiming at six extreme energy efficiency technologies of a blast furnace process, a'technical unit energy-saving cost (CCEa)-net present value (NPV)-internal return rate (IRR) 'ternary index system is constructed, an energy-saving supply curve and a cost-benefit analysis method are combined, and comprehensive evaluation is realized through four steps: calculating the energy-saving and emission-reducing potential when the blast furnace uses anthracite, and introducing exclusive emission factor correction; calculating the unit energy-saving cost considering the multi-pollutant synergistic benefit, and combining the exclusive reachable rate of the technology; the full-life-cycle cost effectiveness is analyzed from the perspective of enterprises, and technology maturity correction is introduced; and carrying out dynamic weighted sorting based on a TOPSIS method, and outputting technical priorities. The method breaks through the limitation of single-dimensional evaluation, realizes the collaborative evaluation of economic and environmental benefits, and provides a decision basis for the low-carbon transformation of the blast furnace.

The invention discloses an efficient carbon ash dissociation method for stone coal vanadium ore acid leaching vanadium tailings, which comprises the following steps: 1) pulping: mixing the stone coal vanadium ore acid leaching vanadium tailings, an additive and water for pulping to obtain mixed slurry; (2) the mixed slurry is subjected to ore grinding treatment, and ore grinding pulp is obtained; according to the method, the stone coal vanadium ore acid leaching vanadium tailings are subjected to ore grinding under the additive system with the specific combination and proportion, and the dissociation performance of the stone coal vanadium ore acid leaching vanadium tailings is synergistically improved; meanwhile, aiming at the characteristic that the coal surface of the stone coal is partially oxidized, a flotation reagent composed of a traditional collecting agent, composite oleic acid and octanol is adopted, the collecting capacity is effectively improved, the reagent is saved, higher carbon and ash flotation separation selectivity can be obtained, and obtained carbon-rich concentrate can be used as blending combustion coal; the obtained high-ash tailings can be used for preparing Portland cement, baking-free bricks and other building materials after being dehydrated, resource utilization of the stone coal vanadium ore acid leaching vanadium tailings is achieved, and the method has good application and popularization value.

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 relates to the technical field of carbon material preparation, and provides a coal-derived carbon-based nickel diatomic catalyst, and a preparation method and application thereof. The preparation method comprises the following steps: S100, grinding, mixing and activating anthracite and potassium hydroxide to obtain a first material; s200, mixing the first material with an oxidizing agent, and heating and oxidizing to obtain a second material; s300, the second material is put into a soluble nickel salt solution to be soaked and stirred, and a third material is obtained; and S400, grinding and mixing the third material and a nitrogen-containing compound, carbonizing, and pickling to obtain the coal-derived carbon-based nickel diatomic catalyst. The coal-derived carbon-based nickel diatomic catalyst prepared by the method has good catalytic performance, the active site of the catalyst is Ni2-N6, the structure is stable, meanwhile, the generation energy barrier for generating a carboxyl intermediate can be effectively reduced, and the generation rate of carbon monoxide is increased.

The invention provides a coal dust deashing method, and belongs to the technical field of coal cleaning and processing. According to the method, the anthracite is subjected to first acidolysis by adopting hydrochloric acid, so that carbonate minerals and metal oxides such as Fe2O3 and CaO in the anthracite are directionally removed; then destroying a silicate crystal structure in the anthracite by adopting a hydrofluoric acid solution so as to deeply desiliconize; and finally, hydrochloric acid is adopted for second acidolysis, insoluble fluorides such as CaF2 generated in the hydrofluoric acid desiliconization stage are dissolved, efficient deashing of anthracite is achieved, and the ash content of finally obtained deashed coal is smaller than or equal to 0.2 wt%. The method has the advantages of extremely high anthracite ash removal efficiency and low cost, is suitable for efficiently cleaning anthracite to prepare subsequent products, and does not cause secondary pollution.

The invention relates to the technical field of lithium ion battery negative electrode material preparation, and discloses a graphitized anthracite-based negative electrode material grading method. The method comprises the following steps: (1) conveying a graphitized negative electrode material to a first-stage airflow classifier (4) for first-stage classification, and collecting a negative electrode material with a first granularity obtained after first-stage classification; and (2) conveying the negative electrode material with the particle size smaller than the first particle size obtained after primary classification to a secondary airflow classifier (12) for secondary classification, and collecting the negative electrode material with the second particle size obtained after secondary classification. According to the method disclosed by the invention, the graphitized anthracite-based negative electrode material is crushed and graded as required by adopting a mode of combining superfine mechanical crushing and multi-stage airflow classification.

The invention discloses coal water slurry prepared from epoxy resin wastewater and a preparation method and application of the coal water slurry, and the coal water slurry comprises the following components in parts by weight: 225-600 parts of mixed coal; 150 to 400 parts of epoxy resin wastewater; 0.1 to 10 parts of an additive; the mixed coal is composed of bituminous coal and anthracite, and the weight ratio of the bituminous coal to the anthracite is (1-5): (1-5). The epoxy resin wastewater is used for replacing fresh water, anthracite and bituminous coal are mixed, the prepared coal water slurry has no corrosion to a rod mill and is good in slurrying property and high in ash fusion point, the water-cooled wall gasification furnace is used for gasifying the coal water slurry, the gasification reaction temperature is high, oxygen consumption is low, the carbon conversion rate is high, the COD content of external gasification sewage of the gasification furnace and the sewage discharge amount are low, and the coal water slurry can be recycled. The method has the advantages of realization of the resource utilization of the epoxy resin wastewater, improvement of the adaptive capacity of coal types, no environmental pollution, environmental protection, and generation of important economic values and social benefits.

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.

This invention discloses a method for combined ash reduction in the beneficiation and metallurgy of high-ash anthracite. Based on the dispersal characteristics of high-ash anthracite, a crushing-grinding-multi-stage flotation-alkali leaching process is designed, improving the flotation reagent regime. Simultaneously, a highly efficient combined collector is designed specifically for high-ash anthracite, enhancing the ash reduction effect of the process. Furthermore, this invention proposes an alkaline leaching treatment for the middlings obtained from flotation, improving the overall recovery rate of the coal preparation process. The low-ash anthracite product obtained by this method achieves a yield of over 56%, with ash content reduced to below 10%, and an overall recovery rate of over 84%, meeting the technical requirements for low-ash products. Moreover, this method requires only conventional mineral processing equipment, has a simple process flow, and is easily scalable for large-scale industrial production.

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 present invention discloses a hard carbon negative electrode material and a preparation method thereof, which belongs to the technical field of sodium ion batteries. The synthesis step adopts a two-step plasma method, step 1: using biomass carbon, anthracite and metal salt as reactants, the mixture is ball-milled by a plasma ball milling process. Step 2: The precursor obtained in step 1 is subjected to plasma ball milling, and the temperature in the plasma ball ink chamber is in situ heated to 200-400°C. The particle size of the anthracite after ball milling is 2-15μm; step 3: high-temperature sintering is performed under an inert atmosphere, and the obtained product is soaked in hydrochloric acid to remove impurities in the ash, and then washed with water to neutrality, and finally a hard carbon negative electrode material is obtained. The hard carbon negative electrode material prepared by the present invention exhibits high coulombic efficiency and specific capacity, good cycle stability and excellent rate performance.

This invention relates to the field of power engineering control technology, and in particular to an intelligent coal blending system and method. It includes: a coal type identification unit for identifying the type of coal supplied to the coal mill; wherein the supplied coal types include lignite, bituminous coal, and anthracite; a unit calculation unit for real-time acquisition of the calorific value K and sulfur content I of the coal; and an intelligent blending unit for real-time adjustment and control of the amount of bituminous coal in the coal mill's supplied coal types based on the calorific value K and the sulfur content I. This invention, through intelligent, automated, and real-time adjustment and control of the amount of bituminous coal in the blended coal, and by using the calorific value and sulfur content as parameters for adaptive correction, effectively improves the complete combustion of coal to achieve the required energy supply and reduces pollution generated by coal combustion.

The invention belongs to the technical field of refractory materials, and particularly relates to an energy-saving furnace lining ore heat self-baking carbon brick and a preparation method thereof. The phosphorus-doped graphite, the electrically calcined anthracite, the silicon carbide and the silica powder are selected as main components, the asphalt, the lignite and the carbon fibers are used for forming a composite binder, meanwhile, the silica powder and the asphalt are subjected to modification treatment, the energy-saving furnace lining ore heat self-baking carbon brick is prepared, the heat conductivity coefficient and the compression strength of the carbon brick are effectively improved, and the service life of the furnace lining ore heat self-baking carbon brick is prolonged. And meanwhile, excellent erosion resistance is obtained.

The invention relates to the field of flame boiler devices, and discloses an anthracite combustion flame boiler device which comprises a hearth and an upper hearth communicated with the hearth, the hearth comprises an upper combustion chamber, a middle combustion chamber and a lower combustion chamber which are sequentially connected, over-fire air inlets are symmetrically formed in the outer wall of the upper hearth, and the over-fire air inlets are connected with an over-fire air bellow; nozzles are symmetrically formed in the outer wall of the upper combustion chamber, the included angle between the incident angle of each nozzle and the vertical direction is 12-17 degrees, a plurality of exhaust air inlets are symmetrically formed in the outer wall of the middle combustion chamber, a plurality of graded air inlets are symmetrically formed in the outer wall of the middle combustion chamber, the graded air inlets are connected with graded air bellows, and the excess air coefficient in the hearth is 1.2. The furnace temperature field can be maintained to be uniform and stable, local overtemperature or low temperature is avoided, grading air and over-fire air are matched to effectively prevent the water cooling wall and the heating surface of the upper furnace from slagging, the slag removal maintenance frequency is reduced, and the service life of equipment is prolonged.

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.

To improve the production rate of sintered ore when the sintered ore is produced using a carbonaceous material for sintering containing biomass carbon.SOLUTION: In a method for producing sintered ore by firing a sintering raw material containing a carbonaceous material for sintering, the carbonaceous material comprises coke breeze and / or anthracite together with not more than 50 mass% of a biomass carbonaceous material. The carbonaceous material for sintering is added by 5 mass% or more of a standard blend amount thereof, for increased heat during firing. A biomass carbonaceous material may have an average particle size of 1.45 mm or more, and may be obtained by crushing a compressed molded product of a wood carbonized material.SELECTED DRAWING: None