TW202403059A - Process of obtaining high iron content products from fines of iron ore and biomass, and their products - Google Patents

Abstract

This invention refers to a process for obtaining a product of high iron content and high physical and metallurgical performance for use in reduction furnaces (blast furnaces and direct reduction) and melting furnaces (smelters, melters, and electric furnaces), aiming at the sustainable production of iron and steel. The process consists of mixing iron ore fines with biomass, binders, nanomaterials, additives, and catalysts, and performing subsequent steps of comminution, agglomeration, heat treatment, solid-solid separation, and coating.

Description

Methods and products for obtaining high iron content products from iron ore powder and biomass

The present invention is included in the technical field of mineral metallurgy and relates to a method for obtaining high performance products from iron ore powder and renewable carbon sources from biomass. This method allows to obtain high iron content products with high physical and metallurgical properties for use in reduction furnaces (blast furnaces and direct reduction) and melting furnaces (melters and electric arc furnaces), aiming at the sustainable production of iron and steel.

The development of agglomeration technology arose from the need to recycle fine particles, allowing commercial utilization of such particles and minimizing the environmental impact caused by the production of finely powdered or granular materials.

The most frequent applications of the coalescing process are: • Ore or fine-grained concentrate without causing damage to the permeability of the load and the gas-solid reaction conditions in the metallurgical furnace; • Waste or fines by-products from other mineral metallurgical processes for their appropriate reuse or recycling; and • Metal scrap (copper, iron, titanium) and other materials (paper, cotton, wood) for transportation or recycling.

The agglomeration operation of iron ore and some or all of its reducing compounds is intended to give the load to be fed into the reduction reactor and/or the melting furnace a suitable shape and mechanical resistance suitable for downward solid loads. and counter-flow of heating gas and/or upward reducing agent, and suitable for storage and silting transport processes before loading into reduction reactors and melting furnaces to produce pig iron or pig steel. The most common agglomeration processes of iron ore and its reduction products used as loads in reduction and melting furnaces in the steel industry are: sintering and granulation (for iron oxides) and briquetting (for iron oxides and metallic iron- DRI).

Granulation is the latest agglomeration process and is the result of the need to use fine-grained concentrates of magnetite from certain iron ores. Iron ore agglomerates are produced by agglomerating particles smaller than 45 µm in size to form agglomerates of 8 to 16 mm in a disk or drum. In addition to constant moisture, the material to be coalesced needs to have a high specific surface area (2,000 cm ² /g). These agglomerates are usually hardened by heat treatment and used as blast furnace feed or direct reduction furnace feed. In addition to high energy consumption, this hardening process also has high capital costs.

Briquetting consists of the agglomeration of fine particles by means of compression, assisted by a binder, allowing to achieve a compacted product with appropriate shape, size and mechanical parameters. Pressing the mixture between fine particles and binder to obtain agglomerates called agglomerates, which agglomerates should have properties for stacking in metallurgical reactors, further processing (solidification, drying or burning), transportation, handling and the appropriate resistance to use. In addition to the technical benefits, the reduction in material volume allows for more cost-effective transportation and storage of finely powdered materials.

In addition to the need to cost-effectively utilize the waste and fines generated in ore processing, environmental concerns and stricter regulations have made briquetting an important alternative to agglomerating fine powdered materials. Thus making it economically valuable.

Adhesives are used for briquetting when the material to be agglomerated is not resistant to compression and impact after compaction. The pressure applied is usually low to avoid further fragmentation of the particles.

The present invention relates to a process for obtaining products with high physical and metallurgical properties, which may or may not be agglomerated. The product produced by the present invention is produced from a mixture of iron ore powder (including tailings, pre-reduction and metallization powder), biomass, binders, nanomaterials, additives and catalysts. If the product agglomerates, the agglomeration process can be carried out by granulation in granulating discs or rollers, by briquetting or by extrusion.

The carbothermal reduction process used in the present invention consists of the chemical reduction of oxides using CO (carbon monoxide) gas from a carbon-bearing substance, traditionally in the "form" of mineral coal, coke or charcoal. handle.

Prior art has several carbothermal reduction techniques. These technologies are based on the use of mineral coal, charcoal or coal coke to treat iron ore agglomerates (agglomerates, agglomerates, etc.) blocks and extrudates) are subjected to carbothermal reduction designed to ensure minimum physical resistance to handling typically under weathering conditions and the thermochemical requirements of the processes used. Many of these technologies are aimed at recovering waste materials with high iron and/or carbon content (such as scale, screen fines, process discharge powders, powders and thickener sludge collected in dust collection systems). Autoreducing agglomerates are used in conventional reduction furnaces, such as small/medium blast furnaces and reduction-melting reactors (such as Tecnored, ITmk3, Hi-sarna and Fastmet). The heat for direct reduction and carbon gasification reactions ( dissolution loss at temperatures greater than 850°C) is supplied in conventional furnaces by the combustion of solid fuels (coke, coal and biomass) and by gas ( It is supplied by the combustion of LPG, NG and gases produced in the steel manufacturing process, such as coke oven gas, blast furnace gas and steelmaking gas.

The present invention minimizes some problems by using a microwave oven instead of conventional ovens, which use solid fuels and gases that emit GHG; require high doses of binders; long time for product reduction; and resistance to contact with water. Low, high dust yield through transportation and handling, high dust yield through thermal shock, and contamination of the product with undesirable elements from certain binders. The present invention introduces a simplified method of unit operation that reduces CAPEX and OPEX costs.

In particular, the present invention brings significant advantages over the prior art documents in approach 3. This is the lack of prior agglomeration of large amounts of base mixture, thereby significantly reducing process costs (CAPEX and OPEX). There is no prior art technology capable of carrying out carbothermal reduction industrially without implying prior agglomeration of a mixture of iron ore fines and biomass. Therefore, the present invention proves to be significantly innovative, exhibiting high reduction efficiency (metallic Fe > 50%, as shown in Figure 5).

The present invention brings many advantages over the processes commonly used in industry, such as: • The ability to use different sources of iron ore powder (sinter feed, aggregate feed and/or ultra-fine tailings); • The ability to use different types of iron ore powder of biomass, both pyrolytic and non-pyrolytic; • Widely applicable in reduction furnaces and smelting furnaces due to the physical and metallurgical qualities of the products obtained; • Relevant technological alternatives that can provide commercial and strategic benefits to the company and its customers ; • Greater process path adaptability, thereby providing steel customers with a BF (blast furnace) path to extend the service life of their assets and reduce CAPEX without compromising the achievement of short- and medium-term CO ₂ emission reduction goals; • Iron and steel production Reduction in greenhouse gas (GHG) emissions in the chain; • Cost reduction due to possible lower binder consumption for coalescence and possible greater use of iron-poor iron ores with higher silica content, which The ore can be concentrated by magnetic separation at a later stage, since the material produced by the reduction of hematite is magnetic or strongly paramagnetic. Object of the invention

The present invention aims to provide a new method of obtaining high-iron-volume products with greater process route adaptability, thereby providing steel customers with an extension of the service life of their assets and reducing CAPEX without compromising the achievement of CO ₂ emission reduction goals.

Another object of the present invention is to obtain products from iron ore and biomass powder, which have excellent physical and metallurgical properties and have wide applicability in reduction furnaces and smelting furnaces.

Another object of the present invention is to reduce the environmental impact produced, because in addition to allowing the use of iron ore tailings (the ultra-fine part of iron ore tailings is usually processed in tailings dams), it is also due to the use of biomass. Substituting natural gas and mineral coal to reduce iron oxides allows the reduction of greenhouse gas (GHG) emissions in the iron and steel production chain.

As shown in Figure 1, the present invention discloses a method for obtaining high-iron products from iron ore powder and renewable carbon sources from biomass. The method includes the following steps: a) Mix iron ore powder, biomass, binders, nanomaterials, additives and catalysts in a powerful mixer; b) Perform at least one step in the group consisting of coalescence and carbothermal reduction; c) Perform at least one step from the group consisting of: solid-solid separation, carbothermal reduction and coalescence.

As shown in Figure 1, the present invention may also include further steps: a) Perform at least one step in the group consisting of drying/curing and coating application; b) Perform carbothermal reduction; c) Carry out coating application.

While the present invention may be susceptible to different embodiments, the preferred embodiments are shown in the drawings and the following detailed discussion, based on the following assumptions: This description is to be considered as illustrative of the principles of the invention but is not intended to be a description of the invention. Limited to what is illustrated and described herein.

The subject matter contemplated by the present invention is hereinafter described in detail by way of non-limiting example, since the materials and methods disclosed herein may contain various details and procedures without departing from the scope of the present invention. All parts and percentages disclosed below are by weight unless otherwise specified.

The present invention relates to a method for obtaining high iron content products represented by the flow chart in Figure 1, preferably by mixing at least 60% by weight of iron ore powder; at most 30% by weight of biomass; at most 15% by weight of Binder; up to 15% by weight of nanomaterials; up to 15% by weight of chemical additives and catalysts. More specifically, up to 20% by weight of biomass, preferably pyrolyzed biomass, may be used. This base mixture should be made in a powerful mixer.

Raw materials that can be used as a source of iron ore fines include sinter feed, agglomerate feed or ultrafine iron ore tailings. The material should have a particle size less than 10 mm, with a d90 between 10 µm and 8 mm and a maximum moisture content of 25%. The chemical composition should have the following characteristics: 30% to 68% Iron (total Fe), 0.5% to 15% SiO ₂ , 0.1% to 5.0% Al ₂ O ₃ , 0.001% to 0.1% P, 0.1% to 2% Mn and 0.1% to 10% loss due to calcination.

It is possible to use biomass from different sources such as eucalyptus, elephant grass, residues such as bagasse and other biomass and residues. Preferably, the biomass should contain the following chemical composition: 0.5% to 25.0% ash; 1% to 80% volatile materials; <1% sulfur and 20% to 80% fixed carbon. Biomass can also be used in a pyrolyzed form, also known as biochar.

Binders to be used include sodium silicate (solid and liquid), pregelatinized tapioca starch or corn starch, plant resins, polymers, geopolymers, etc. The binder is combined with chemical catalysts and nanomaterials to form an additive binder mixture.

Chemical catalysts such as Ca, K, Na, Ni, Si and W can be used to speed up the rate of carbothermal reduction and ensure better uniformity in microwave agglomerate heating.

The nanomaterials to be used can be selected from the following groups: carbon nanotubes, expanded graphite, functionalized microsilicate, tubular nanosilica, tubular halloysite, carbon nanofibers, graphene, etc.

Chemical additives to be used in the coating process can be based on C, Al, Ni, ferric kaolinite or other materials with high reducing potential, such as bauxite, alumina, polymers, latex, etc. If necessary, fluxes based on calcium and dolomite can also be used as additives and as raw materials in the production of self-reducing agglomerates ( path 1 ).

As represented by the flow chart of Figure 1, after the intensive mixing step, the material that will follow Pathway 1 should undergo a coalescing step. The material should be agglomerated by a mechanical process (briquetting, extrusion or granulation) into a structure that provides sufficient raw strength for handling, screening and drying/curing.

As an alternative, the base mixture obtained in an intensive mixer can undergo a comminution process to increase the specific surface area and adhesion between particles. Preferably, the comminution should be carried out by compression by means of a roller press, a roller crusher or another comminution device in varying amounts (partial or complete).

After the coalescing step, the material should undergo a particle size classification step, preferably screening, whereby the undersize (particle size <5 mm) should be returned to the intensive mixer, and the oversize (particle size >5 mm) should continue to Drying/curing step. Preferably, drying/curing should be carried out in a desiccator, in a microwave oven or a conventional oven by burning gases (including burning synthesis gases produced by biomass gasification) at a temperature in the range of 240°C to 400°C. , in such a way as to remove excess moisture and also cure the binder contained, with the aim of providing adequate resistance to handling, storage, transport and use in top access in blast furnaces.

The agglomerate products obtained in this approach are considered autoreducing agglomerates and have approximately 6% to 20% carbon, and 40% to 60% total iron content.

Also represented by the flow chart of Figure 1, after the intensive mixing step, the materials that will follow path 2 should also undergo a coalescing step. Materials should be agglomerated by mechanical processes (briquetting, extrusion or granulation).

As an alternative, the base mixture obtained in an intensive mixer can undergo a comminution process to increase the specific surface area and adhesion between particles. Preferably, the comminution should be carried out by compression by means of a roller press, a roller crusher or another comminution device in varying amounts (partial or complete).

After the coalescence step, the material should undergo a carbothermal reduction step in a microwave oven or other type of oven until a temperature between 500°C and 950°C is reached, depending on the degree of reduction desired, ranging from magnetite and/or or the general formation of maghemite to total or near total metallization of the iron oxides present in the base mixture. Depending on the situation, carbothermal reduction can be carried out between 500°C and 800°C.

Microwave restoration can be performed in equipment with powers ranging from 0.6 kW to 10 kW for a frequency of 2,450 MHz, and up to 100 kW at a frequency of 915 MHz, with multiples of these powers available on larger scales. Microwave equipment similar to that described in patent documents BR102020012185-5 and BR102019023195-5 may be used, preferably presenting a reduction and inert gas confinement system for a carbothermal reduction chamber for inert gas injection, as illustrated in Figure 2. Preferably, the inert gas system used consists of nitrogen (N ₂ ).

After the carbothermal reduction step, the material proceeds to a coating application step, which aims to avoid reoxidation of the coalesced surface layer by atmospheric oxygen and to improve its physical and weather resistance.

Optionally, a coalescing step (briquetting, extrusion or granulation) can be carried out before the coating step. This briquetting step can be performed in a cold or warm location and, if desired, additive binders can be used.

The agglomeration products obtained via route 2 of the invention present high chemical, physical and metallurgical quality alternatives for reduction and melting furnaces (eg blast furnaces - BF and melters, such as electric arc furnaces - EAF). Such agglomeration products have diameters from 8 to 150 mm, different geometries, a total iron content above 60% and a carbon content below 5%. If the aim is to obtain agglomerates to be used in BF, the raw materials and process parameters are used in such a way that a final agglomerate containing 60% to 95% of the total iron content is obtained. If the aim is to obtain agglomerates to be used in EAF, the raw materials and process parameters are used in such a way that agglomerates containing metallic iron in the range above 85% are obtained.

Also represented by the flow chart of Figure 1, after the intensive mixing step, the material that will follow Pathway 3 should go directly to the carbothermal reduction step in the microwave oven. As in Pathway 2 , microwave reduction can be performed in equipment with powers ranging from 0.6 kW to 10 kW for a frequency of 2,450 MHz, and up to 100 kW for a frequency of 915 MHz, and may be multiples of these powers for larger scale use.

Optionally, the base mixture may be subjected to a comminution process, preferably by compression by means of a roller press, a roller mill or another comminution device of varying amounts (partial or complete).

After the carbothermal reduction step, the material may or may not decompose, depending on the physical conditions under which the product leaves the microwave oven. The subsequent step consists of a solid-solid separation step, which may consist of magnetic separation or gravity separation, with the goal of increasing the iron concentration. The low-iron concentrate obtained should be returned to the intensive mixer, while the iron-rich concentrate continues to subsequent process steps.

Concentrates containing a high iron content (which are in the form of powders) can already be considered as final products for sale, since they are highly metallized materials (total iron content of 60%) with ideal characteristics for use in smelting furnaces or other melting furnaces and 85%).

Optionally, concentrates containing high iron content can proceed to a coalescing step, which can be carried out in cold or warm conditions and, if necessary, using additive binders. In addition to increasing protection from oxidation by the ambient atmosphere, coalescence allows obtaining products in a granular and high-density form for transportation and disposal.

The agglomerate then proceeds to the coating application step when it appears on route 2 , in this way preventing the agglomerate surface layer from being re-oxidized by atmospheric oxygen and improving its physical and weather resistance.

Optionally, the material fed to the coalescing step can come directly from carbothermal reduction, depending on the characteristics of the material after microwave reduction.

Appearing in route 2 , the agglomerate product obtained via route 3 of the invention is indicated as a high chemical, physical and metallurgical quality alternative for use in reduction furnaces (e.g. blast furnaces - BF) and melters, such as electric arc furnaces - EAF). The agglomerate obtained via route 3 has a total iron content greater than 60%. If the aim is to obtain agglomerates to be used in BF, the raw materials and process parameters are used in such a way that a final reduced agglomerate containing 60% to 95% of the total iron content is obtained. If the aim is to obtain agglomerates to be used in EAF, the raw materials and process parameters are used in such a way that a final metallized agglomerate containing metallic iron in the range above 85% is obtained.

For compliance with physical quality specifications, laboratory tests are performed on the agglomerates to assess their mechanical strength. The parameters evaluated were abrasion resistance, with the product showing <25% results; drum resistance (>75%); impact/drop resistance (>75%); and compressive strength (dry and in >150 daN) after exposure to water. Regarding chemical and metallurgical quality, tests are performed to assess the degree of metallization at a level depending on the feed and purpose, whether metallization (>50%) or concentration (0 and 10%).

Figure 3 shows images of samples obtained according to Route 3 before and after the carbothermal reduction step, illustrating the morphology of metallic iron formed after reduction of the mixture by microwaves. According to Figures 5 and 6, the results achieved indicate the metallic Fe content of the non-agglomerates as well as the agglomerates (according to route 2 ), which ranges from 50% to 80% for a base mixture with a carbon content of approximately 20% within the range of %.

Example

In order to evaluate the quality and performance of the product obtained through Route 3 of the present invention, an experiment was conducted by mixing 76% iron ore powder blocks (FeT > 64.5%, particle size <325#) and 24% fine charcoal blocks (from eucalyptus). Pyrolysis (C _fixed > 75%, particle size < 1.0 mm)), homogenized in an intensive mixer (C _fixed 20%). As shown in Figure 2, the carbothermal reduction system was carried out in a microwave oven at a power of 1000 W and a frequency of 2.45 GHz. Reduction was carried out in an inert atmosphere with _N2 for 20 min.

As shown in Figure 3, the resulting thin metallized product has a metallic iron content of 76.7% and a total iron content of 89.9%, as shown by the XRD results shown in the table of Figure 7.

Therefore, although only some embodiments of the invention have been shown, it is assumed that various omissions, substitutions and changes may be made by those skilled in the art without departing from the spirit and scope of the invention. The described embodiments are to be considered in all respects as illustrative only and not restrictive.

All combinations of elements expressly determined to perform the same function in substantially the same manner to achieve the same result are within the scope of the invention. Substitutions of elements from one described embodiment to another are fully contemplated and covered.

1:Path 2:Path 3:Path

The invention is described in detail based on the respective drawings:

Figure 1 illustrates a flow chart of a method for obtaining metallized and pre-reduced iron ore products and iron ore briquettes with biomass by microwave carbothermal reduction according to the present invention.

Figure 2 shows a schematic diagram of a microwave oven used during the laboratory scale carbothermal reduction test steps (Paths 2 and 3).

Figure 3 shows images of a sample of the non-agglomerated base mixture before and after the carbothermal reduction step, its total magnetization and the morphology of the metallic residue obtained.

Figure 4 shows the relationship between the mass of the residue after reduction and the metallic iron content of the carbothermal reduction residue for pathways 2 and 3.

Figure 5 shows the metallic iron content obtained relative to the microwave incidence time (using a power of 1.0 kW) and the amount of carbon included in the base mixture before carbothermal reduction.

Figure 6 shows the metallic iron content obtained relative to the specific energy (Gj/t product) and the amount of carbon contained in the base mixture before carbothermal reduction in a microwave oven.

Figure 7 shows the XRD results of the residues obtained after carbothermal reduction (paths 2 and 3) of agglomerated and non-agglomerated base mixture formulations, and the total Fe content of the iron component of the base mixture before carbothermal reduction. instructions.

Figure 8 shows the XRD results of the residue obtained after carbothermal reduction (Path 3) of the residual sludge formulation at non-agglomerated iron ore concentration and the total Fe content of the ferrous component of the base mixture before carbothermal reduction. instructions.

Figure 9 shows a schematic diagram of a semi-industrial microwave oven to be used during the carbothermal reduction step, in this case using a base mixture as feed (path 3).

1:Path

2:Path

3:Path

Claims (28)

A method for obtaining high-iron products from iron ore powder and biomass, characterized by including the following steps: a. Mixing iron ore powder, biomass, binders, nanomaterials, additives and catalysts in a powerful mixer; b . perform at least one step in the group consisting of coalescence and carbothermal reduction; c. perform at least one step in the group consisting of: solid-solid separation, carbothermal reduction and coalescence. The method of claim 1, including the additional step of: d. Performing at least one step of the group consisting of drying/curing and coating application. The method of claim 1, wherein after the mixing step, the crushing step is performed by pressing by means of a roller press, a roller crusher or another crushing device. Such as the method of claim 1, which includes the following steps: a. Mixing iron ore powder, biomass, binders, nanomaterials, additives and catalysts in a strong mixer; b. Performing through briquetting, granulation or extrusion Coalescence; c. Solid-solid separation via screening; d. Drying/curing. Such as the method of claim 1, which includes the following steps: a. Mixing iron ore powder, biomass, binders, nanomaterials, additives and catalysts in a strong mixer; b. Performing through briquetting, granulation or extrusion Coalescence; c. Carbothermal reduction; d. Coating application. The method of claim 5, wherein after the carbothermal reduction step, an additional agglomeration step is performed via briquetting, granulation or extrusion. Such as the method of claim 1, which includes the following steps: a. Mixing iron ore powder, biomass, binders, nanomaterials, additives and catalysts in a strong mixer; b. Carbothermal reduction; c. Via briquetting , granulation or extrusion for agglomeration; d. for coating application. The method of claim 7, wherein after the carbothermal reduction step, a solid-solid separation step is performed via magnetic separation or gravity separation. Such as the method of claim 1, which includes the following steps: a. Mix iron ore powder, biomass, binders, nanomaterials, additives and catalysts in a strong mixer; b. Carbothermal reduction; c. With the help of magnetism Separation or gravity separation is used for solid-solid separation. The method of claims 7 and 9, wherein after the carbothermal reduction step, a depolymerization step is performed. The method of claim 1, wherein the carbothermal reduction is carried out in a microwave oven or a conventional oven at a temperature in the range of 500°C to 950°C. The method of claim 1, wherein the carbothermal reduction is carried out in a microwave oven or a conventional oven at a temperature in the range of 500°C to 800°C. The method of claim 2, wherein the drying/curing can be carried out in a microwave oven or a conventional fuel-burning oven at a temperature in the range of 240°C to 400°C. If the method of claim 1 is used, at least 60% by weight of iron ore powder is used, the particles of the iron ore powder are less than 10 mm, and the iron content ( _total Fe) of the iron ore powder is 30% to 68%, the The iron ore powder is selected from the group consisting of sinter feed, aggregated particle feed and ultra-fine iron ore tailings. The method of claim 1, wherein up to 30% by weight of biomass which may come from eucalyptus, elephant grass, residues such as bagasse, etc. is used. A method as claimed in claim 1, wherein up to 20% by weight of biomass which may come from eucalyptus, elephant grass, residues such as bagasse, etc. is used. The method of claim 1, wherein biomass in pyrolyzed form may be used. The method of claim 1, wherein the biomass has 20% to 80% fixed carbon. The method of claim 1, wherein up to 15% by weight of a binder selected from the group consisting of sodium silicate, pregelatinized tapioca starch or corn starch, plant resins, polymers, geopolymers, etc. is used. The method of claim 1, wherein up to 15% by weight of a catalyst selected from the group consisting of Ca, K, Na, Ni, Si and W is used. The method of claim 1, wherein up to 15% by weight of a nanomaterial selected from the group consisting of: carbon nanotubes, expanded graphite, functionalized microsilicate, tubular nanosilica, tubular polyethylene Hydrokaolin, carbon nanofibers, graphene, etc. The method of claim 1, wherein up to 15% by weight of chemical additives based on C, Al, Ni, iron-containing kaolinite or other materials with a high reduction potential, such as bauxite, alumina, polymeric Materials, latex, etc. The method of claim 1, wherein the chemical additives used may contain fluxes based on calcium and dolomite. An agglomerate product with a high iron content obtained from iron ore and biomass powder, produced by a method as described in claim 1, characterized by having chemical, physical and metallurgical qualities suitable for use in reduction furnaces (blast furnaces) and having A diameter of 8 to 150 mm, a carbon content of 6% to 20%, and a total iron content of 40% to 60% are considered autoreducing agglomerates. An agglomerate product with a high iron content obtained from iron ore and biomass powder, produced by a method as described in claim 1, characterized in that it is suitable for use in reduction furnaces and melting furnaces (for example, blast furnaces - BFs and melters, Chemical, physical and metallurgical qualities such as electric arc furnace - EAF) with diameters from 8 to 150 mm, total iron content above 60%, carbon content below 5%, wear resistance <25%, drum resistance ) >75%, impact/drop resistance >75%, compressive strength >150 daN, and metallization >50%. Such as the agglomeration product of claim 25, wherein if the product is intended for use in a blast furnace - BF, it has a total iron content of 60% to 95%. The agglomerate product of claim 25, wherein if the product is intended for use in an electric arc furnace - EAF, it has greater than 85% metallic iron. A product with a high iron content obtained from iron ore and biomass powder produced by a method as described in claim 1, characterized in that it is in the form of a powder and has chemical, physical and metallurgical properties suitable for use in smelting furnaces and other melting furnaces quality because it is a highly metallized material (total iron content between 60% and 85%).