Method for preparing sintered ore based on solid waste activated carbon powder

Abstract

The invention discloses a method for preparing sintered ore based on solid waste activated carbon powder. The method comprises the steps that the solid waste activated carbon powder is divided into a part A and a part B; the method comprises the following steps: spraying quicklime digestion liquid to the surface of solid waste activated carbon powder A, and then performing pre-granulation by taking the solid waste activated carbon powder A sprayed with the quicklime digestion liquid as a pelletizing core and taking blast furnace return mine fine ground powder as adhesive powder to obtain pretreated activated carbon powder A; an ammonia additive is sprayed to the surface of the solid waste activated carbon powder B, then the solid waste activated carbon powder B sprayed with the ammonia additive serves as a pelletizing core, blast furnace return mine fine ground powder and coal pitch fine ground powder serve as adhesive powder, a binder is added, pre-granulation is conducted, and pretreated activated carbon powder B is obtained; mixing the pretreated activated carbon powder A with coke powder to obtain sintering fuel, and then uniformly mixing the sintering fuel with sintering production raw materials to obtain a sintered material A; granulating the sintered material A, and adding the pretreated activated carbon powder B to prepare a sintered mixture; and the sintering mixture is distributed on a sintering trolley, ignition is carried out, air draft sintering is carried out, and finished sinter is obtained.

Description

Technical Field

[0001] The present invention relates to the technical fields of materials and metallurgy, and more specifically, to a method for preparing sintered ore based on waste activated carbon powder. Background Technique

[0002] Iron ore sintering is the process of mixing various powdered iron-containing raw materials with appropriate amounts of fuel and flux, and after mixing and granulation, a series of physical and chemical changes occur to sinter the materials into blocks on a sintering device. Sintering is a typical high-energy-consuming and highly polluting industry, generally accounting for 10%-15% of the total energy consumption of iron and steel enterprises. The sintering process emits waste gas containing a large amount of greenhouse gas CO 2 as well as polluting gas SO x , NO x , which is the main atmospheric pollution source in the iron and steel industry.

[0003] In the future, the iron and steel industry will fully implement ultra-low emissions, the emission standards of flue gas pollutants will be further improved, and the emission reduction pressure of the iron and steel industry will continue to intensify. To meet the new environmental protection requirements, the activated carbon desulfurization and denitrification technology for sintering flue gas has been promoted in iron and steel enterprises. The activated carbon desulfurization and denitrification process is a sintering flue gas purification technology that can simultaneously treat multiple pollutants. The removal rates of SO 2 and NO x are as high as 98% and 80% respectively. The activated carbon desulfurization and denitrification system mainly consists of three parts: adsorption, desorption, and sulfur recovery and utilization. It has the advantages of simple process, small floor area, and can realize the resource utilization of SO 2 in flue gas. Considering aspects such as compressive strength, abrasion resistance, porosity, and desulfurization and denitrification ability, most of the activated carbon for desulfurization and denitrification used in industry at present is made of coal as the material, which is activated by high-temperature heating to form cylindrical activated carbon with a diameter of 8-9 mm.

[0004] During the process of adding activated carbon in the activated carbon flue gas purification device from the top of the tower to the adsorption tower, it moves downward under the dual action of gravity and the bottom discharge device of the tower. During the movement, small particles of waste activated carbon powder will fall out. How to reuse it with high added value has become a difficult problem. Ren Kun et al. from the University of Science and Technology Beijing conducted research on using activated carbon powder for sintering flue gas desulfurization and denitrification in blast furnace injection. The results showed that activated carbon powder can replace part of the anthracite for blast furnace injection. In addition, bituminous coal has strong explosiveness, while activated carbon powder has no explosiveness. In the mixture of the two, when the mass fraction of activated carbon powder is greater than 40%, there is no explosiveness; the combustibility of bituminous coal is better than that of activated carbon powder, and an anti-synergistic effect will occur after mixing the two. However, adding activated carbon powder will, on the one hand, reduce the overall combustion performance of the injected coal, and on the other hand, due to the relatively high sulfur and nitrogen content of activated carbon powder, it may directly affect the performance of molten iron and subsequent steel products.

[0005] Li Xiaolong of MCC Changtian and others studied the influence of the addition of activated carbon powder on the key properties of regranulation through the experiment of compounding desulfurization and denitrification activated carbon powder with raw coal and then regranulating. The results showed that qualified desulfurization and denitrification activated carbon could be prepared by compounding activated carbon powder with raw coal, and the key properties could meet the index requirements, providing a new idea for the high-value reuse of activated carbon powder. However, the technical process was complex, the equipment investment was huge, and the performance of the prepared activated carbon was poor.

[0006] Chinese Patent No. 202211550346.X discloses a method for treating waste activated carbon by calcium-based regulation. CaO, Fe 2 O 3 , MgO, SiO 2 and amino surfactants are added to waste activated carbon and then transported into a rotary kiln type activation furnace for high-temperature activation. The method of zoning temperature control is adopted to realize the preheating, carbonization and activation of waste activated carbon in different regions, and the loss of granular carbon is controlled ≤5%, and the loss of powdered carbon is controlled ≤15%. However, the process for treating waste activated carbon is complex, a new rotary kiln type activation furnace needs to be built, and a large amount of energy is consumed during high-temperature activation.

[0007] Chinese Patent No. 202010551157.9 discloses a method for using waste activated carbon powder in sintering. The waste activated carbon powder and coke powder are mixed according to a mass ratio of 12 - 37.8:62.2 - 88 to obtain sintering fuel; the particle size of the waste activated carbon powder is ≤3 mm, and the mass fraction of the particle size <0.5 mm is 70 - 80%; the particle size of the coke powder is ≤8 mm, and the mass fraction of the particle size <0.5 mm is 10 - 15%; the sintering fuel, iron ore powder to be sintered and flux are mixed to obtain a sintering mixture; the mass ratio of the sintering fuel to the iron ore powder to be sintered is 3 - 6:75 - 90; after granulating the sintering mixture, it is used for sintering. This method simply replaces part of the coke powder with solid waste activated carbon powder, without considering the difference in combustion characteristics between solid waste activated carbon powder and coke powder, which is likely to cause the inconsistency of the heat transfer front and the combustion front during sintering and reduce the sintering ore yield. Summary of the Invention

[0008] The purpose of the present invention is to overcome the above-mentioned defects existing in the prior art, provide a method for preparing sintered ore based on solid waste activated carbon powder, solve the problem that the combustion characteristics of desulfurization and denitrification solid waste activated carbon powder do not match those of sintering fuel, avoid the problem that the sulfur and nitrogen impurities rich in desulfurization and denitrification solid waste activated powder deteriorate the mineralization reaction of sintering materials, improve the quality of sintered ore, and realize the application of solid waste activated carbon powder in sintering production.

[0009] To achieve the above purpose, the technical solution of the present invention is as follows:

[0010] A method for preparing sintered ore based on solid waste activated carbon powder, comprising the following steps:

[0011] (1) Divide the solid waste activated carbon powder into two parts, A and B, and the mass ratio of solid waste activated carbon powder A to solid waste activated carbon powder B is (1 - 2):1;

[0012] (2) Spray the quicklime digestion solution on the surface of the solid waste activated carbon powder A. Subsequently, using the solid waste activated carbon powder A sprayed with the quicklime digestion solution as the pelletizing core and the finely ground blast furnace return fines as the adhering powder, perform pre-pelletizing to obtain the pretreated activated carbon powder A. Among them, the mass fraction of the solid waste activated carbon powder A in the pretreated activated carbon powder A is 80% - 90%, the mass fraction of the finely ground blast furnace return fines is 5% - 15%, and the mass fraction of quicklime is 4% - 9%;

[0013] (3) Spray the ammonia-based additive on the surface of the solid waste activated carbon powder B. Subsequently, using the solid waste activated carbon powder B sprayed with the ammonia-based additive as the pelletizing core, the finely ground blast furnace return fines and the finely ground coal tar pitch as the adhering powder, add a binder, and perform pre-pelletizing to obtain the pretreated activated carbon powder B. Among them, the mass fraction of the solid waste activated carbon powder B in the pretreated activated carbon powder B is 55% - 65%, the mass fraction of the finely ground blast furnace return fines is 25% - 30%, the mass fraction of the ammonia-based additive is 3% - 8%, the mass fraction of the finely ground coal tar pitch is 5% - 8%, and the mass fraction of the binder is 1% - 3%;

[0014] (4) Mix the pretreated activated carbon powder A with coke powder to obtain the sintering fuel, and then mix it with the sintering production raw materials to obtain the sintering material A. Among them, the mass fraction of the pretreated activated carbon powder A in the sintering material A is 3% - 5%, the mass fraction of coke powder is 1% - 3%, and the mass fraction of the sintering production raw materials is 92% - 96%;

[0015] (5) Pelletize the sintering material A, and add the pretreated activated carbon powder B during the pelletizing process to make the sintering mixture. Among them, the mass fraction of the sintering material A in the sintering mixture is 90% - 95%, and the mass fraction of the pretreated activated carbon powder B is 5% - 10%;

[0016] (6) Spread the sintering mixture onto the sintering trolley, with a cloth thickness of 800 mm - 1000 mm, ignite and perform suction sintering to obtain the finished sintered ore.

[0017] Optionally, in step (5), the ratio of the average particle size of the pretreated solid waste activated carbon powder A to the average particle size of the sintering mixture is (0.3 - 0.7):1.

[0018] Optionally, the ratio of the average particle size of the pretreated solid waste activated carbon powder B to the average particle size of the sintering mixture is (0.8 - 1.2):1.

[0019] Optionally, in step (1), the solid waste activated carbon powder is the waste activated carbon powder generated during the purification of sintering flue gas by the activated carbon desulfurization and denitrification system; in the solid waste activated carbon powder, the mass ratio of particles with a particle size less than 3 mm is greater than 90%.

[0020] Optionally, in step (2), the quicklime digestion liquid is prepared by fully adding water to quicklime for digestion in a digester.

[0021] Optionally, in steps (2) and (3), the finely ground blast furnace return ore powder is obtained by finely grinding the fine-grained sintered return ore under the blast furnace screen, and the mass ratio of particles with a particle size < 200 mesh is > 75%.

[0022] Optionally, in step (3), the ammonia-based additive includes urea and / or ammonium bicarbonate, which is sprayed on the surface of the solid waste activated carbon powder in the form of a saturated solution.

[0023] Optionally, for the finely ground coal tar pitch powder, its particle size is 100 mesh to 200 mesh.

[0024] Optionally, the binder is an organic binder, which is composed of at least one of sodium silicate, sodium humate, sodium carboxymethyl cellulose, and polyacrylamide.

[0025] Optionally, in step (5), the distance from the position where the pretreated activated carbon powder B is added to the sintering material A to the outlet of the granulator is 1 / 2 to 2 / 3 of the length of the granulator.

[0026] Optionally, in step (6), for the ignition and suction sintering, the ignition temperature is 950 °C to 1050 °C, and the suction negative pressure is 9000 Pa to 15000 Pa.

[0027] Optionally, in step (4), the sintering production raw materials include iron ore powder and flux, where the mass fraction of the iron ore powder is 86% to 92%, and the mass fraction of the flux is 8% to 14%.

[0028] Implementing the embodiments of the present invention will have the following beneficial effects:

[0029] (1) The present invention pre-treats the solid waste activated carbon powder, uses the solid waste activated carbon powder sprayed with quicklime digestion liquid as the core for pelletizing, and the finely ground blast furnace return ore powder as the adhering powder for pre-pelletizing, solves the problem of the mismatch in combustion characteristics between the solid waste activated carbon powder and coke powder, and reduces the influence of sulfur impurities in the solid waste activated carbon powder on the mineralization reaction of the sintering material.

[0030] (2) The present invention pre-treats the solid waste activated carbon powder, uses the solid waste activated carbon powder sprayed with ammonia-based additives as the core for pelletizing, and the finely ground blast furnace return ore and coal tar pitch powder as the adhering powder for pre-pelletizing, can improve the performance of the bonding phase in the mineralization reaction of the sintering material, reduce the influence of nitrogen impurities in the solid waste activated carbon powder on the sintering process, and improve the quality of the sinter.

[0031] (3) The present invention creatively designs a pretreatment method for solid waste activated carbon powder and optimizes the way of blending and sintering two different pretreated solid waste activated powders, which can improve the air permeability of the sintering material layer, enhance the mineralization reaction ability of the sintering material, realize the blending and sintering production of solid waste activated carbon powder, and thus reduce the solid fuel consumption in sintering. Detailed implementation manners

[0032] The present invention will be further described below in conjunction with specific embodiments, but it is not limited to the present invention in any way.

[0033] Example 1

[0034] A method for preparing sintered ore based on solid waste activated carbon powder. The solid waste activated carbon powder is the waste activated carbon powder generated when the activated carbon desulfurization and denitrification system purifies sintering flue gas. The solid waste activated carbon powder is divided into two parts, A and B, and the mass ratio of solid waste activated carbon powder A to solid waste activated carbon powder B is 1.3:1. The proportion of the solid waste activated carbon powder with a particle size less than 3 mm is greater than 90%.

[0035] Quicklime digestion solution is evenly sprayed on the surface of solid waste activated carbon powder A. Taking the solid waste activated carbon powder A sprayed with quicklime digestion solution as the pelletizing core and the finely ground powder of blast furnace return fines as the adhering powder, pre-pelletizing is carried out to obtain pretreated activated carbon powder A. Among them, the mass fraction of solid waste activated carbon powder A in the pretreated activated carbon powder A is 80%, the mass fraction of the finely ground powder of blast furnace return fines is 14%, and the mass fraction of quicklime is 6%. The finely ground powder of blast furnace return fines is prepared by finely grinding the fine-grained sintered return fines under the blast furnace screen, and the mass proportion of the particle size less than 200 mesh is 80%. The quicklime digestion solution is prepared by fully adding water to digest quicklime in a digester.

[0036] Ammonia additives are evenly sprayed on solid waste activated carbon powder B. Taking the solid waste activated carbon powder B sprayed with ammonia additives as the pelletizing core and the finely ground powder of blast furnace return fines and the finely ground powder of coal tar pitch as the adhering powder, and adding a binder, pre-pelletizing is carried out to obtain pretreated activated carbon powder B. Among them, the mass fraction of solid waste activated carbon powder B in the pretreated activated carbon powder B is 55%, the mass fraction of the finely ground powder of blast furnace return fines is 30%, the mass fraction of ammonia additives is 7%, the mass fraction of the finely ground powder of coal tar pitch is 6%, and the mass fraction of the binder is 2%. The binder is sodium humate; the ammonia additive is urea, which is sprayed on the surface of the solid waste activated carbon powder in the form of a saturated solution. The finely ground powder of blast furnace return fines is prepared by finely grinding the fine-grained sintered return fines under the blast furnace screen, and the mass proportion of the particle size less than 200 mesh is 80%, and the particle size of the finely ground powder of coal tar pitch is 120 mesh to 150 mesh.

[0037] The pre-treated activated carbon powder A is mixed with coke powder to obtain sintered fuel, and then mixed with sintering production raw materials to obtain sintered material A; among them, the mass fraction of the pre-treated activated carbon powder A in the sintered material A is 3.5%, the mass fraction of the coke powder is 2.5%, and the mass fraction of the sintering production raw materials is 94%. The sintering production raw materials include iron ore powder and flux, among which the mass fraction of the iron ore powder is 90% and the mass fraction of the flux is 10%.

[0038] The sintered material A is granulated, and pre-treated activated carbon powder B is added during the granulation process to make sintered mixed material; the mass fraction of the sintered material A in the sintered mixed material is 90%, and the mass fraction of the pre-treated activated carbon powder B is 10%; the distance from the position where the pre-treated activated carbon powder B is added to the sintered mixed material to the outlet of the granulator is 1 / 3 of the length of the granulator. The ratio of the average particle size d of the pre-treated solid waste activated carbon powder A A to the average particle size D of the sintered mixed material is controlled to be 0.4; the ratio of the average particle size d of the pre-treated solid waste activated carbon powder B B to the average particle size D of the sintered mixed material is controlled to be 1. The sintered mixed material is distributed on the sintering trolley, and the cloth thickness is 800 mm; ignition is carried out for suction sintering, where the ignition temperature is 980 °C and the suction negative pressure is 12,000 Pa; the finished sintered ore is obtained.

[0039] After the application of the present invention, the desulfurization and denitrification solid waste activated carbon powder is applied to sintering production. The sintering solid fuel consumption is reduced from 45 kg / t to 41 kg / t, and the utilization coefficient is increased from 1.325 t / h·m 2 to 1.385 t / h·m 2 ; the tumbler strength of the sintered ore is increased from 80.4% to 86.2%, and the reducibility is increased from 81.3% to 85.2%.

[0040] Example 2

[0041] A method for recycling solid waste activated carbon powder in sintering production. The solid waste activated carbon powder is the waste activated carbon powder generated during the purification of sintering flue gas by the activated carbon desulfurization and denitrification system. The solid waste activated carbon powder is divided into two parts, A and B, and the mass ratio of the solid waste activated carbon powder A to the solid waste activated carbon powder B is 1.7:1. The proportion of the solid waste activated carbon powder with a particle size less than 3 mm is greater than 92%.

[0042] Quicklime digestion liquid is evenly sprayed on the solid waste activated carbon powder A. Using the solid waste activated carbon powder A sprayed with quicklime digestion liquid as the pelletizing core and the fine-ground powder of blast furnace return fines as the adhering powder, pre-pelletizing is carried out to obtain pre-treated activated carbon powder A. Among them, the mass fraction of the solid waste activated carbon powder A in the pre-treated activated carbon powder A is 87%, the mass fraction of the fine-ground powder of blast furnace return fines is 8%, and the mass fraction of quicklime is 5%. The fine-ground powder of blast furnace return fines is obtained by fine-grinding the fine-grained sintered return fines under the blast furnace screen, and the proportion of its particle size less than 200 mesh is 85%. The quicklime digestion liquid is obtained by fully adding water to digest quicklime in a digester.

[0043] Spray ammonia additives evenly on the solid waste activated carbon powder B. Using the solid waste activated carbon powder B sprayed with ammonia additives as the core for pellet formation, the fine-ground blast furnace return fines and fine-ground coal tar pitch are used as adhering powders, and a binder is added to obtain pre-treated activated carbon powder B through pre-pelletization. Among them, the mass fraction of solid waste activated carbon powder B in the pre-treated activated carbon powder B is 62%, the mass fraction of fine-ground blast furnace return fines is 25%, the mass fraction of ammonia additives is 5%, the mass fraction of fine-ground coal tar pitch is 6.5%, and the mass fraction of the binder is 1.5%. The binder is a mixture of sodium carboxymethylcellulose and polyacrylamide; the ammonia additive is ammonium bicarbonate, which is sprayed on the surface of the solid waste activated carbon powder in the form of a saturated solution. The fine-ground blast furnace return fines are obtained by fine-grinding the fine-grained sintered return fines screened from the blast furnace, and the mass ratio of those with a particle size less than 200 mesh is 85%. The particle size of the fine-ground coal tar pitch is 140 - 160 mesh.

[0044] Mix the pre-treated activated carbon powder A with coke powder to obtain sintering fuel, and then mix it with sintering production raw materials to obtain sintering material A; among them, the mass fraction of pre-treated activated carbon powder A in sintering material A is 4.5%, the mass fraction of coke powder is 1%, and the mass fraction of sintering production raw materials is 94.5%. The sintering production raw materials include iron ore powder and flux, among which the mass fraction of iron ore powder is 88% and the mass fraction of flux is 12%.

[0045] Pelletize the sintering material A, and add the pre-treated activated carbon powder B during the pelletizing process to make a sintering mixture; the mass fraction of sintering material A in the sintering mixture is 94%, and the mass fraction of pre-treated activated carbon powder B is 6%; the distance from the position where the pre-treated activated carbon powder B is added to the sintering mixture to the outlet of the pelletizer is 1 / 2 of the length of the pelletizer. The ratio of the average particle size d A of the pre-treated solid waste activated carbon powder A to the average particle size D of the sintering mixture is controlled to be 0.6; the ratio of the average particle size d B of the pre-treated solid waste activated carbon powder B to the average particle size D of the sintering mixture is controlled to be 1.1. Distribute the sintering mixture onto the sintering trolley, with a cloth thickness of 950 mm; ignite and conduct suction sintering, where the ignition temperature is 1020 °C and the suction negative pressure is 13000 Pa; obtain the finished sintered ore.

[0046] After the application of the present invention, the desulfurized and denitrified solid waste activated carbon powder is applied to sintering production. The solid fuel consumption in sintering is reduced from 44.8 kg / t to 39.2 kg / t, and the utilization coefficient is increased from 1.339 t / h.m 2 to 1.426 t / h.m 2 ; the tumbler strength of the sintered ore is increased from 81.2% to 87.4%, and the reducibility is increased from 82.1% to 86.3%.

[0047] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A method for preparing sintered ore based on solid waste activated carbon powder, characterized in that: The following steps are involved: (1) Dividing solid waste activated carbon powder into two parts, A and B, the mass ratio of solid waste activated carbon powder A to solid waste activated carbon powder B is (1-2):1; (2) spraying quicklime digestion liquid on the surface of the solid waste activated carbon powder A, and then using the solid waste activated carbon powder A sprayed with quicklime digestion liquid as the ball core and the blast furnace return ore fine powder as the adhesive powder, pre-granulating to obtain pretreated activated carbon powder A; wherein the mass fraction of the solid waste activated carbon powder A in the pretreated activated carbon powder A is 80% to 90%, the mass fraction of the blast furnace return ore fine powder is 5% to 15%, and the mass fraction of quicklime is 4% to 9%; (3) spraying an ammonia additive onto the surface of the solid waste activated carbon powder B, and then using the solid waste activated carbon powder B sprayed with the ammonia additive as the ball core, blast furnace return ore fine powder and coal tar pitch fine powder as adhesive powder, and adding a binder to perform pre-granulation to obtain pretreated activated carbon powder B; wherein the mass fraction of the solid waste activated carbon powder B in the pretreated activated carbon powder B is 55% to 65%, the mass fraction of the blast furnace return ore fine powder is 25% to 30%, the mass fraction of the ammonia additive is 3% to 8%, the mass fraction of the coal tar pitch fine powder is 5% to 8%, and the mass fraction of the binder is 1% to 3%; (4) mixing the pretreated activated carbon powder A with coke powder to obtain a sintering fuel, and then mixing it with the sintering production raw materials to obtain a sintering material A; wherein the mass fraction of the pretreated activated carbon powder A in the sintering material A is 3% to 5%, the mass fraction of the coke powder is 1% to 3%, and the mass fraction of the sintering production raw materials is 92% to 96%; (5) granulating the sintering material A, and adding the pretreated activated carbon powder B during the granulation process to prepare a sintering mixture; wherein the mass fraction of the sintering material A in the sintering mixture is 90% to 95%, and the mass fraction of the pretreated activated carbon powder B is 5% to 10%; (6) Add the sintering mixed material cloth onto the sintering trolley, the cloth thickness is 800 mm to 1000 mm, ignite and perform exhaust sintering to obtain a finished sintered ore.

2. The method for preparing sintered ore based on solid waste activated carbon powder according to claim 1, characterized in that: In step (5), the ratio of the average particle size of the pretreated solid waste activated carbon powder A to the average particle size of the sintered mixture is (0.3-0.7):1; The ratio of the average particle size of the pretreated solid waste activated carbon powder B to the average particle size of the sintered mixture is (0.8-1.2):

1.

3. The method for preparing sintered ore based on solid waste activated carbon powder according to claim 1, characterized in that: In step (1), the solid waste activated carbon powder is waste activated carbon powder generated when an activated carbon desulfurization and denitrification system is used to purify sintering flue gas; among the solid waste activated carbon powder, the mass proportion of particles with a diameter less than 3 mm is greater than 90%.

4. The method for preparing sintered ore based on solid waste activated carbon powder according to claim 1, characterized in that: In step (2), the quicklime digestion liquid is obtained by fully digesting quicklime with water in a digester.

5. The method for preparing sintered ore based on solid waste activated carbon powder according to claim 1, characterized in that: In step (2) and step (3), the blast furnace return ore fine-ground powder is obtained by fine-grinding the fine-grained sintered return ore under the blast furnace sieve, and the mass proportion of the particle size <200 mesh is >75%.

6. The method for preparing sintered ore based on solid waste activated carbon powder according to claim 1, characterized in that: In step (3), the ammonia additive includes urea and / or ammonium bicarbonate, which is sprayed on the surface of the solid waste activated carbon powder in the form of a saturated solution; The coal tar pitch finely ground powder has a particle size of 100-200 meshes; The binder is an organic binder, which is composed of at least one of water glass, sodium humate, sodium carboxymethyl cellulose and polyacrylamide.

7. The method for preparing sintered ore based on solid waste activated carbon powder according to claim 1, characterized in that: In step (5), the distance between the position where the pretreated activated carbon powder B is added to the sintering material A and the granulator outlet is 1 / 2 to 2 / 3 of the granulator length.

8. The method for preparing sintered ore based on solid waste activated carbon powder according to claim 1, characterized in that: In step (6), the ignition and exhaust sintering is carried out, the ignition temperature is 950°C to 1050°C, and the exhaust negative pressure is 9000Pa to 15000Pa.

9. The method for preparing sintered ore based on solid waste activated carbon powder according to claim 1, characterized in that: In step (4), the sintering production raw materials include iron ore powder and flux, wherein the mass fraction of the iron ore powder is 86% to 92%, and the mass fraction of the flux is 8% to 14%.