Biomass iron-containing agglomerate for producing combustible gas and DRI and preparation method thereof

A biomass and agglomerate technology, applied in fluidized bed furnaces and other directions, can solve the problems of incomplete tar cracking, environmental pollution, waste of biomass energy, etc., to strengthen the ion offset effect, reduce tar content, and promote catalytic cracking. Effect

Active Publication Date: 2018-09-25
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method often uses biomass as a substitute for fuel, but in the process of reducing ore, biomass is accompanied by cracking of biomass. In this process, biomass is prone to incomplete cracking and produces a large amount of tar, which not only causes Waste of material and energy, and cause serious environmental pollution, this problem needs to be solved urgently

Method used

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  • Biomass iron-containing agglomerate for producing combustible gas and DRI and preparation method thereof
  • Biomass iron-containing agglomerate for producing combustible gas and DRI and preparation method thereof
  • Biomass iron-containing agglomerate for producing combustible gas and DRI and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of biomass iron-containing agglomerate used for producing combustible gas and DRI of the present invention includes iron-containing raw materials, biomass, additives and binding agent; described iron-containing raw materials, biomass, additives and binding agent according to The composition is as follows in parts by mass: 50-60 parts of biomass; 100-200 parts of iron-containing raw materials; 5-10 parts of additives; 3-5 parts of binder.

[0035] The method for producing direct reduced iron (DRI) by gasification of the present invention, concrete steps are as follows:

[0036] (1) A preparation method for biomass iron-containing agglomerates used to produce combustible gas and DRI, the specific steps are: mixing iron-containing raw materials, biomass, additives and binders, passing through a briquetting machine at 80-120 The iron-containing agglomerate is prepared by hot pressing at ℃, the pressure of the iron-containing agglomerate is 20MPa, and then the agglome...

Embodiment 2

[0065] The basic content of the present embodiment is the same as that of Example 1, except that the additive is composed of sodium carbonate, laterite nickel ore, dolomite, plant ash and chromium slag; the mass percent of each component is: sodium carbonate: 15%, Laterite nickel ore: 30%, dolomite: 30%, plant ash: 15%, chromium slag: 10%. Described chromium slag chemical composition mass percent is as follows: SiO 2 : 28%, Al 2 o 3 : 8%, CaO: 30%, MgO: 15%, Fe 2 o 3 : 10%, Cr 2 o 6 : 0.8% and Na 2 Cr 2 o 7: 1%, the rest are impurities. The metallization rate of direct reduced iron (DRI), the yield of biomass gasification, and the yield of tar were detected after the reaction. The experimental results are recorded in Table 1. On the one hand, the chromium slag can effectively reduce the chromium slag under the high reducing condition of biomass gasification to generate low-priced chromium oxides. The combination of chromium oxides with iron oxides and calcium-magnes...

Embodiment 3

[0067] The iron ore concentrate is composed of Hayangdi, Tubalang powder, Canadian fine powder, Harun powder and Jinbuba powder. The composition of the ore is shown in Table 2. The mass percentage of various mineral powders is: Hayangdi: 10 %, Tubalang powder: 20%, Canadian fine powder: 40%, Harbin powder: 15%, Jinbuba powder: 15%. The metallization rate of direct reduced iron (DRI), biomass gasification yield, and tar yield were detected after the reaction. The experimental results are recorded in Table 1.

[0068] Table 2 Mineral powder composition (wt / %)

[0069]

[0070] The metallization rate of DRI is further improved. Through repeated discussions, the inventor believes that this process may be caused by the thermal decomposition of the crystal water in the iron ore powder during the heat preservation process at 900°C, and more voids are generated in the iron-containing agglomerates. , thereby increasing the gas-solid reaction interface for the reduction of iron oxid...

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Abstract

The invention relates to a biomass iron-containing agglomerate for producing combustible gas and DRI, and a preparation method thereof, belonging to the technical field of iron making. The iron-containing agglomerate of the invention comprises, by mass, 50-60 parts of biomass, 100-200 parts of an iron-containing raw material, 5-10 parts of additives and 3-5 parts of a binder, wherein the additivescomprise sodium carbonate, laterite nickel ore, dolomite and plant ash. The iron-containing agglomerate of the invention reduces the thermal stability of the biomass and its decomposition products; the biomass acts as a reducing agent for iron oxide and a C source and an H source for combustible gas; the iron oxide acts as an iron source for steel preparation and an oxygen source for production of CO through reactions of carbon; so the iron-containing agglomerate promotes the catalytic cracking of tar and the biomass and its decomposition products, improves the gasification yield biomass andincreases the metallization rate of DRI.

Description

technical field [0001] The invention relates to the technical field of ironmaking, in particular to a biomass iron-containing agglomerate for producing combustible gas and DRI and a preparation method thereof. Background technique [0002] Biomass energy is the energy form of solar energy stored in biomass in the form of chemical energy, that is, the energy with biomass as the carrier. It is directly or indirectly derived from the photosynthesis of green plants and is a renewable energy source. Biomass energy has the advantages of renewable, low pollution and wide distribution. Rational use of biomass energy can effectively reduce dependence on fossil energy and reduce environmental pollution caused by energy consumption. Nowadays, the development and utilization of biomass energy has become the focus of international attention, and biomass energy technology has a very broad development prospect. During the application of existing biomass, biomass is often gasified. Bioma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00C22B5/12C22B1/243C22B1/16
CPCC21B13/0073C21B13/008C22B1/16C22B1/2406C22B1/243C22B5/12
Inventor 魏汝飞龙红明李家新王平孟庆民春铁军狄瞻霞余正伟李宁王凯祥
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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