1166results about "Recycling and recovery technologies" patented technology

The invention relates to a method for recycling iron on line from iron-containing industrial slag and preparing a glass ceramics frit, belonging to the technical field of resource comprehensive utilization and material preparation and mainly comprising a two-step method process of iron-containing industrial slag online rough adjustment and modification for reducing iron and fine adjustment and modification for preparing the frit. The method comprises the steps of: discharging high-temperature iron-containing slag into a high-temperature furnace device, and simultaneously adding a reducing agent and a modifying agent to ensure that slag components are adjusted to reach the optimal component point in which iron oxide is reduced; after fully reacted, separating reduced molten iron from the slag, and recycling to obtain high-temperature molten iron; further adding a modifying agent and an adjusting agent into the slag remained after the separation to ensure that the slag components are adjusted to achieve the quality requirement of slag glass ceramics on the frit; and water-hardening, drying and grading the qualified slag to prepare the glass ceramics frit. The invention realizes multiple purposes that the heat of the slag is directly utilized and metal iron is recycled to prepare a high addition value product as well as solid wastes are massively utilized, and the like.

A gas recovery and reuse/recycle method is disclosed which can readily and economically recover valuable and/or environmentally hazardous gases from a manufacturing or chemical process and then return the gas to the process for reuse, and repeat this many times without significant contamination or degradation of the gas or the produced products. All gas transport, compression and storage equipment is designed and maintained so that it is non-contaminating to the process gas. Commonly the process gas will be a Group VIII gas, preferably He, Ne, Kr or Xe, or a gas which comprises a hazard to the ambient environment or beings therein, such as a carbon oxide gas, a halocarbon gas, an acid-precursor gas, a biologically hazardous gas, or a radioactive gas.

The invention provides a melting furnace slag quenching dry type granulation and sensible heat recovery generating system and a method using the same and belongs to the technical field of steel metallurgy furnace slag treatment and complementary energy recovery. The melting furnace slag quenching dry type granulation and sensible heat recovery generating system provided by the invention comprisesa slag-receiving device, a high-pressure water-air pulverization furnace slag quenching and granulating device, a furnace slag slow-cooling device, a sensible heat recovery generating device and a waste gas purification treatment device. According to the invention, the melting furnace slag is quenched and granulated by utilizing the high-pressure water-air pulverization device, so that the melting furnace slag is rapidly cooled to be in a glassy state; and then through a water-cooled type vibration grid plate, the melting furnace slag in the glassy state is further subjected to heat exchange with cold air so as to facilitate the subsequent recovery of the sensible heat. By the system provided by the invention, the melting furnace slag is quenched and granulated, and the high-temperature sensible heat resource of the furnace slag is sufficiently recovered and is used for generation on the basis that the water activity quality of the furnace slag is not influenced.

Improved methods for the extraction or dissolution of metals, metalloids or their oxides, especially lanthanides, actinides, uranium or their oxides, into supercritical solvents containing an extractant are disclosed. The disclosed embodiments specifically include enhancing the extraction or dissolution efficiency with ultrasound. The present methods allow the direct, efficient dissolution of UO2 or other uranium oxides without generating any waste stream or by-products.

Embodiments of the invention are directed to a rotor for a molten metal pump and a molten metal pump including the rotor. The rotor has a main body and a top comprised of a material that is at least twice as hard as the main body. The top, among other things, may form a first portion of each rotor blade wherein the first portion directs molten metal into a pump chamber or other structure in which the rotor is mounted.

A metal scrap submergence device comprising an open top chamber including walls of a heat resistant material, an inlet positioned in a side wall of the chamber, an outlet positioned in the base of said chamber, and a ramp adjacent said side wall of the chamber. The side wall further includes a feature affecting molten metal flow. The feature can include, for example, a baffle, a vane, a passage, a diverging or converging shape and combinations thereof. Similarly, the molten metal flow can be affected by slanting the ramp inwardly or outwardly.

The technological process of separating and extracting metal elements from V-Ti iron ore includes the steps of: agglomerating ore powder of mixing V-Ti iron ore powder, reductant, additives and adhesive, pressing the mixture into 10-25 mm diameter agglomerates and drying at 80-90 deg.c; reducing inside one bottom rotating furnace to obtain metal products; smelting the metal products in an electric furnace to obtain molten iron and V-Ti slag component, and smelting the V-Ti slag component to obtain V-Cr oxide and Ti slag as the material for producing titanium while. The present invention has high reduction temperature, fast reduction speed, short reduction time, high production efficiency, high metal and V-Ti recovering rate and less environmental pollution.

The invention relates to the field of energy recovery utilization and in particular to a molten blast furnace slag sensible heat recovery method and a device; the method is characterized in that: themolten blast furnace slag carries out a first heat recovery in a granulator, and then a second heat recovery is carried out by a vibrated bed, and then a third heat recovery is carried out in a fluidized bed, and the reclaimed heat energy is reutilized or converted in a hot air or power generating way; the realization steps are that: 1) the molten blast furnace slag is arranged in the granulator for granulation; 2) the blast furnace slag granules carry out heat exchange in the vibrated bed; 3) the blast furnace slag granules carry out heat exchange in the fluidized bed; 4) after heat exchangeis carried out, the heat is used for power generation from air or is directly utilized in a hot wind way. The method has the beneficial effects that: the sensible heat of the molten blast furnace slagis utilized respectively in a way of waste heat stream power generation and in a way of blast furnace hot wind, compared with the existing water quenching method, 1.0-1.2t of fresh water can be savedwhen processing 1t of molten slag, and sulfides H2S and SO2 are not produced, and energy equivalent to 47kg of standard coal is saved.

Systems, methods and devices are provided for transporting, tracking and managing waste or recyclable materials, which may include one or more devices for transporting waste or recyclable material. The device may comprise a base; and a collapsible sleeve movable between an open state and a collapsed state, wherein the collapsible sleeve in the open state interfaces in a nesting manner with the base to form a bin for receiving and transporting waste material.

The invention discloses a process method for cooperatively and continuously processing waste containing iron and/or zinc, lead, copper and tin, and the like and molten steel slag on line, separating and recycling metal such as iron, zinc, lead, copper and tin as well as molten slag. The cooperative processing and recycling method is characterized in that pellets prepared from waste containing iron, zinc, lead, copper, tin and the like, particles, a blocky material containing iron, zinc, lead, copper, tin and the like and high-temperature molten steel slag are added into a reducing, volatilizing and smelting furnace, molten iron, which is obtained by air-blowing, adding of fuels such as coal gangues and flux such as high silicon and high aluminum, high-temperature reducing and volatilizingtreatment, is discharged from an iron outlet of the reducing, volatilizing and smelting furnace; volatilized substances such as zinc and lead and smoke gas are sucked into a dust collector for being collected and utilized; enriched metal such as gold, silver, copper, tin and lead is discharged from a discharge hole in the bottommost part of the reducing, volatilizing and smelting furnace for beingrecycled; and molten slag is discharged through a slag outlet, water slag and the like or the molten slag is returned into a converter for being recycled. Waste containing iron, zinc, lead, copper, tin and the like, molten steel slag and coal gangue waste slag and the like are cooperatively and continuously treated to separate and recycle useful metal, so that remarkable energy-saving environment-friendly social benefits and economic benefits are achieved.

The invention relates to an energy-saving slag thermal insulator, and belongs to the technical field of energy conservation, emission reduction and comprehensive utilization in the metallurgy industry. The thermal insulator comprises the following main chemical components in percentage by weight: 25 to 70 percent of SiO2, 1 to 25 percent of Al2O3, 1 to 40 percent of CaO, 0 to 20 percent of MgO, 0 to 10 percent of F<->, 0 to 10 percent of R2O (R is a monovalent metal ion), 0 to 10 percent of Fe2O3, 5 to 60 percent of fixed carbon with bulk density of 0.25 to 0.75g/cm<3>. The thermal insulator has high thermal insulation performance and can reduce the thermal loss of high-temperature slag; the thermal insulator contains a certain amount of fixed carbon, so heat generated in the chemical reaction of the fixed carbon can be used for further making up the thermal loss of the slag; meanwhile, the thermal insulator belongs to a silicon-aluminum material, and part or all of the thermal insulator can be dissolved in the slag finally so as to improve the chemical composition of the slag and reduce the melting point of the slag. The thermal insulator has the advantages of simple production process, low cost, and suitability for various processes for utilizing the sensible heat of the slag, increasing the fluidity of the slag or improving the performance of the slag.

The invention discloses a waste-heat pressure closed-loop thermal treatment method for molten steel slag and is characterized in that the method comprises the following steps of: (1) molten steel slag turning: turning the molten steel slag to a pre-treatment chamber through a slag tank over-turning vehicle; (2) rolling and crushing: spraying water onto the surface of the molten steel slag through automatic water sprayers in the pre-treatment chamber to cool the slag, and rolling and crushing the cooled slag through a rolling and crushing machine; (3) slag pushing: allowing the rolling and crushing vehicle to push the block-shaped high-temperature steel slag which is cooled in the pre-treatment chamber into a slag tank through a discharge port; (4) transport: transporting the slag tank which holds the block-shaped high-temperature steel slag to a waste-heat pressure closed-loop thermal treatment tank through a transport trolley; and (5) slaking: spraying water onto the surface of the block-shaped high-temperature steel slag to generate vapor, and converting f-CaO and f-MgO under the alternating vapor pressure to allow self-slaking and powdering of the steel slag. The method eliminates the limitations of temperature and fluidity of the steel slag, achieves the continuous, mechanical and automatic process of steel slag treatment, and has the advantages of energy conservation, land conservation, high efficiency and high safety.

The invention discloses an afterheat recovery system and an afterheat recovery method of dry granulating liquid slag. The system comprises a granulating cabin, a moving bed and an afterheat recovery system, the inner surface of the granulating cabin is provided with a granulating cabin water cooling wall, the center of the top of the granulating cabin is provided with a slag pipe, the slag pipe extends into the granulating cabin, the lower part of the tail end of the slag pipe is provided with a centrifugal granulator, the centrifugal granulator is connected with a motor arranged at the lower part of the centrifugal granulator, the lateral side of the centrifugal granulator is provided with an air supply pipeline, an annular air opening is formed between the centrifugal granulator and the air supply pipeline, the lower part of the granulating cabin is provided with the moving bed, the inner surface of the moving bed is provided with a moving bed water cooling wall, the top of the moving bed is provided with an air outlet, the bottom of the moving bed is provided with a slag discharge device, an air inlet device is arranged above the slag discharge device, the afterheat recovery system comprises a primary dust remover, an afterheat boiler, a secondary dust remover, an exhaust fan and a chimney which are connected in sequence, and the primary dust remover is connected with the air outlet arranged at the top of the moving bed. The system and the method effectively solve the problems of heat recovery and furnace slag granulation of equipment such as a blast furnace.

The invention belongs to the field of recycling of steel slag, in particular to a method for recycling iron from steel slag. The method comprises the following steps of: (1) pouring steel slag into a grate plate with the length and the width of 180 mm respectively, leading the steel slag with granularity smaller than 180 mm to enter an underground material bin and carrying out first iron recycling on the steel slag with granularity larger than 180 mm by an electromagnetic sucking disk; (2) magnetically separating and crushing the steel slag with granularity smaller than 180 mm, wherein the crushed granularity is smaller than 60 mm; (3) magnetically separating the crushed steel slag; (4) screening by a vibrating screen, leading steel slag with granularity larger than 25 mm to enter a cone crusher for carrying out second crushing with the crushed granularity smaller than 25 mm, and magnetically separating; (5) grinding steel slag with granularity smaller than 25 mm, screening by a cylinder screen with granularity of 2 mm and remelting particle steel with granularity larger than 2 mm for utilizing; and after magnetically separating steel slag with granularity smaller than 2 mm by a wet magnetic separator, separating iron fine powder and tailings. The invention can recycle iron in the steel slag and reduce the iron content of the steel slag below 0.5 percent.

The invention discloses a slag metallurgy smelting reduction production method and belongs to the field of non-blast-furnace ironmaking and comprehensive utilization of resources. The molten state is kept by adding a reducing agent and iron-containing materials in reaction slag, and smelting reduction ironmaking is performed; the requirements of temperature, alkalinity and sufficient mixing are met in the reacting process, the slag obtained through a reaction is treated; the reduced slag can serve as a cement adding agent and a cement adjusting agent or directly serves as cement clinker; other components can also be added to produce cement clinker high in additional value, and efficient and comprehensive utilization of resources is achieved; and the method is a new smelting reduction ironmaking method. The method is short in reaction time, high in metal recycling rate, low in production cost, high in raw material adaptability, large in treatment amount, environment-friendly and high in economic benefit, is a new smelting reduction ironmaking process, and can effectively solve the metallurgy resource recycling problem.

The method to pour residual hot steel sludge for recovery in steel production comprises: a. after casting, pouring the residual steel sludge into empty ladle; b. conveying the sludge to converter and tapping; c. refining; d. casting; repeating. This invention makes full use of the sulfur capacity and strong reducibility to absorb inclusion and improve liquid steel cleanness rapidly, overcomes the consumption for low-melting, and reduces pollution and cost.

The invention discloses a molten steel casting residue treatment and recycling method which comprises the circular treatment steps of slaking, screening, magnetic separation and the like. The f-CaO in casting residue is slaked by vapor to accelerate the expansion and efflorescence of the casting residue, thereby solving the problem on the separation of the casting residue from a tank body and reducing dust nuisance. According to the method, a mixture of water spray casting residue and pyrolytic steel slag is used as the raw material, and the pyrolytic steel slag has the advantage of low f-CaO content, thereby ensuring that the f-CaO content of the final product can meet the requirements of cement and construction material industries; and a rod grinder treatment process is used, thereby achieving favorable grinding effect and ensuring that the product is uniform and stable in particle size. For the product disclosed by the invention, slag steel of which the grade is greater than 80% can be returned for steel making; purified steel shots and magnetic separation powder of which the grade is greater than 42% can be used for a sintering procedure; and steel tailings of which the iron content is smaller than 2% and the f-CaO content is smaller than 3% can be used for producing steel slag powder, steel slag cement, construction material products and road materials. The invention maximally recycles the metal material in the casting residue, realizes the zero discharge of industrial solid waste and ensures that the casting residue can be recycled 100% at a high added value.

The present invention relates to an axle forged from seamless tubes, with a chemical composition suitable to guarantee high fatigue strength, improved yield strength and tensile strength, and having reduced weight for use on railroad vehicles. The present invention further relates to a process of manufacturing the axle forged from seamless steel tube with high fatigue strength, improved yield strength and tensile strength, and having reduced weight for use on railroad vehicles, which is produced from pig iron or scrap, casting, reheating furnace, perforation of billets, elongation of perforated billets, hollow finishing, forging and finish machining, which includes a supporting and centering chamfer at the inner edge of the inspection bore of the end and smooth recess in the entrance of the threaded bores.

The invention belongs to the field of metallurgy, and in particular relates to a method for separating titanium, iron, vanadium and calcium from mixed titaniferous slag. The method comprises the following steps of: sufficiently mixing blast furnace liquid molten titaniferous blast furnace slag and converter vanadium-containing steel slag flowing out from slag discharge holes, so as to form mixed molten slag, blowing an oxidization gas into a mixed molten body, after the gas blowing is accomplished, naturally cooling down the molten slag, manually taking out the vanadium-containing metal iron which is settled to the bottom of the molten slag, further separating the rest vanadium-containing metal iron in a magnetic separation mode, and finally separating titaniferous ingredients in the molten slag from gangue phase by using a gravity separation method so as to obtain titanium concentrate and tailings the main phases which are perovskite phases, wherein the mass percentage of TiO2 in the titanium concentrate is 35-50%. According to the method, the physical thermal resource of the molten slag is sufficiently utilized, the efficiency is high, the energy is saved, and meanwhile the titanium ingredient, the iron ingredient, the vanadium ingredient and the free calcium oxide ingredient in the mixed molten slag are recycled, so that the purpose of comprehensive high-efficiency recycling on secondary resource is achieved.

The invention discloses a high-temperature liquid-state slag dry type centrifugation and granulation waste heat recycling system and method. The system comprises a liquid-state slag drainage system, a liquid-state slag buffering system, a liquid-state slag granulation and heat exchange system, a slag particle conveying system and a waste heat recycling system. The liquid-state slag drainage system comprises a slag groove, a baffle and a slag outlet. The liquid-state slag buffering system is composed of one or more independent slag bags. Each slag bag comprises a bag body, a bag cover, a slag discharge pipe, a stopper rod and other structures. The liquid-state slag granulation and heat exchange system is composed of one or more independent granulation and heat exchange modules which are arranged side by side in one or multiple rows. Each granulation and heat exchange module is composed of a granulation bin, a centrifugal granulator, a movable bed and a slag discharge device. The slag particle conveying system comprises a temperature-resistant conveyor belt and a buffering material bin. The waste heat recycling system comprises a primary dust collector, a waste heat boiler, a secondary dust collector, an exhaust draught fan and a chimney which are sequentially connected. By means of the system and the method, granulation and waste heat recycling of liquid-state slag are effectively achieved.

The invention relates to a method for preparing premelted refining slag by using converter slag and aluminum slag, which comprises the following steps: selecting raw materials according to the requirement that the content of metallic aluminum in the aluminum slag is greater than or equal to 20% in mass percent; proportioning the raw materials under the condition that the mass ratio of the converter slag to the aluminum slag is (2.0-2.5):1; controlling the smelting temperature of the premelted refining slag at 1500-1600 DEG C, adding the aluminum slag in three batches after the converter slag is completely molten down, and standing for 20-30min after the last batch of aluminum slag is added and stirred uniformly, thereby realizing the purpose of separating slag from iron in a molten pool; and cooling the prepared premelted refining slag to the normal temperature, crushing the prepared premelted refining slag to the particles of which the particle size range is within 5-30mm, and then, packaging the particles. On the basis of ensuring the refining effect, the method of the invention completely uses industrial slag materials as raw materials, thereby protecting the natural mineral resources, widening the utilization ways of the converter slag and the aluminum slag as resources, and partially realizing the cyclic utilization of the converter slag in iron and steel production processes.

The invention relates to technology of metallurgical slag processing, in particular to a technological method of ladle slag thermal processing. The technological method of the ladle slag thermal processing comprises the following steps that: ladle molten slag enters a roller slag falling area from a funnel, the slag falling area is provided with a steel ball inside, the steel ball rotates with a roller, the molten slag is cooled by the steel ball, the heat of molten steel and the slag is quickly taken by the steel ball, the molten steel and the slag are taken to a water cooling area by the rolling steel ball after being plasticized and solidified, the molten slag and the steel ball are synchronously cooled by water and then discharged to an outer roller body through a lattice type grate bar of the roller, and the molten slag is cooled again by water in the outer roller body and discharged out finally, wherein the slag and steel are separated under the action of the steel ball rolling at a high speed. The technological method can safely, environmentally and rapidly process the high-temperature ladle slag, can achieve the separation of the slag and the steel, and can solve the problem of processing the ladle slag.

The invention discloses a processing method for crushing slag, comprising the following steps: conducting multi-level crushing, carrying out magnetic separation and grinding. The invention solves the problem that slag is hard to process and provides a reasonable preparation method for slag micro powder. In the method, after the slag is crushed for many times, separated magnetically and grinded, over 99.2% magnetic iron and residues contained in the slag are separated; the obtained products, such as slag steel, steel shots and iron ore concentrate, can be used in iron and steel smelting; and the obtained slag micro powder with the 0.075mm weight of screen residue less than 1% and the specific surface area more than 580m<2>/kg can be applied to cement production or replace part of cement to be used as an admixture of concrete, thereby realizing absolute and effective utilization of slag and accelerating comprehensive utilization level of the solid waste of the slag.

A method of solidifying a steel-making slag is performed by subjecting a mixture of a steel-making slag containing at least about 50% by weight of a powdery steel-making slag having a particle size not greater than about 5 mm and a substance containing at least about 30% by weight of SiO2 (e.g., a fly ash and/or the fine powder of a granulated blast furnace slag) to a hydration reaction. The resulting solidified material contains at least about 20% of a tobermorite phase, has high strength and is suitable as an inorganic material useful as a roadbed material, building and civil engineering materials, etc.

The invention discloses a mixed slag smelting reduction production and thermal refining method, and belongs to the field of non-blast furnace iron smelting and comprehensive utilization of resources. The method comprises the following steps: 1) an iron-contained material and a reducing agent are added in mixed slag of blast furnace slag and molten steel slag for heating to reach a molten state; and oxide gas is sprayed for iron smelting by smelting reduction to treat most iron-contained material; and 2) an iron component, a calcium silicon component and a phosphorus component in the mixed slag are separated and recovered according to a reaction device. After smelting reduction, the reduced slag can serve as a cement additive, a cement regulator, a cement clinker or a cement clinker with high production additional value, so that the method realizes efficient comprehensive utilization of the resources, and is a new smelting reduction iron making method. The method uses smelting reduction of the mixed slag for production of pig iron or steel and phosphorus-enriched phases and thermal refining, is short in reaction time, high in metal recovery rate, low in production cost, high in raw material adaptability, high in handling quantity, environment-friendly and high in economic benefit, and can effectively achieve the goal of efficient recycling of metallurgic resources and heat energy.

Abnormal flows in an extractor are simulated, with a flow divider model and a flow merger model being introduced. Overflow state, entrainment occurrence state, and reflux state in the extractor are simulated. Moreover, abnormal flows under a variety of conditions are simulated efficiently by using object-oriented software as the simulation program.

The invention discloses a steel slag stability modifier and a method for treating the stability of steel slag. The method comprises the following steps that: the steel slag modifier is added into a steelmaking slag tank according to a proportion of between 0.5 and 50 percent of the total steel slag amount for carrying out modification treatment; the steel slag stability modifier comprises the following compositions in percentage by weight that: 30 to 99.88 percent of SiO2, 0.001 to 40 percent of Al2O3, 0.001 to 40 percent of CaO and 0.001 to 20 percent of MgO; and the introduced substances of the compositions can be one of blast furnace slag, quartz sand and riversand or a mixture of a plurality of kinds of the blast furnace slag, quartz sand and riversand. The steel slag stability modifier has wide material source and low cost; the method for treating the stability of steel slag is simple, safe, reliable and easy to operate. The method directly adopts the steel slag stability modifier with low cost after the steel slag is treated in a converter, properly carries out injection treatment in order to change the stability of the steel slag, thereby effectively reducing a content of free calcium oxide in the steel slag and enlarging a safe use range of the steel slag.

A thermal state steel slag waste heat recovery system and recovery method pertains to the field of steel melting waste heat recovery technique. The system includes a slag basin, a wheeled material allocation quantitative feeder, slag inlet hole, a residue port, an air inlet port, an air outlet port, waste heat boiler, slag teeth, a feed lifting plate, and a rotary type steel slag waste heat recovery device, wherein, the wheeled material allocation quantitative feeder is composed of graining wheels connected in series, the slag teeth and the feed lifting plate are distributed on the inner wall of the rotary barrel, when the steel slag thrown by the feed lifting plate falls back to the bottom of the rotary barrel, the steel slag is crushed by the interaction between the steel slag and the slag teeth. Slag poured out from the slag pot with different fluidities, after crushing processing by the wheeled material allocation quantitative feeder, is quantitatively fed to the rotary type steel slag waste heat recovery device, and then further crushing processing to the steel slag and the recycling to the residual heat of steel slag are simultaneously realized. The invention has advantages of realizing graining and waste heat recovery processing to the slag pot with different fluidities.

The invention discloses a high-temperature slag handling technology by the tilting roller process and a high-temperature slag handling device. The handling technology includes that high-temperature metallurgical slag is poured into a rotating working barrel body with a certain angle of inclination in the axial direction by a loading hopper; the slag in a front barrel body of the working barrel body is fast cooled by a cooling medium and the cooling water sprayed by a spray head in sequence and then crushed; the cooled and crushed slag particles are driven to drop from the gaps among cage bars and the gaps between the cage bars and a barrel body shoveling plate into a lower chamber filled with the cooling water to be cooled for the second time; along with the rotation of the working barrel body, the slag particles soaking in the cooling water in the lower chamber are carried to the upper part of the front barrel body by the barrel body shoveling plate provided with dewatering holes, poured into an open discharging chute and conveyed out of the device; the cooling water that carries fine slag particles and is separated by the barrel body shoveling plate flows to a rear barrel body, and the fine slag particles separated and intercepted by a netty slag-water separating device arranged on the rear barrel body are sent to the discharging chute and conveyed out of the device by a small shoveling plate arranged on the internal side surface of the rear barrel body.

The invention provides a method for treating steel slag. The method comprises the steps of feeding silicon-aluminum acidic oxide and steel slag, wherein the total mole ratio of the silicon-aluminum acidic oxide to basic oxide in the mixture is 1:(2.5-2.9); heating and mixing the mixture in a rotary kiln in the presence of a reducing agent, wherein the temperature of the rotary kiln is 1350-1450 DEG C; granulating the product into particles, performing water quenching and cooling, then falling the particles into water, and performing dehydration; and performing magnetic separation on the dehydrated particles to ensure that steel particles are separated from series silicate particles. The invention also provides a device for treating the steel slag, and the device comprises a rotary kiln (5), a coal spraying device (6) which is arranged at the upper end of the tail of the rotary kiln (5), and a granulation wheel (8) which is arranged below a discharge chute (7) in the lower end of the tail of the rotary kiln (5). The series silicates obtained after the treatment of the steel slag by adopting the method disclosed by the invention can replace a silicate cement clinker to produce cement. The method disclosed by the invention realizes comprehensive utilization of industrial wastes.