CN111499230A - Coal gangue solid waste material as raw material admixture - Google Patents

Coal gangue solid waste material as raw material admixture Download PDF

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Publication number
CN111499230A
CN111499230A CN202010351954.2A CN202010351954A CN111499230A CN 111499230 A CN111499230 A CN 111499230A CN 202010351954 A CN202010351954 A CN 202010351954A CN 111499230 A CN111499230 A CN 111499230A
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Prior art keywords
coal gangue
percent
limestone
solid waste
sandstone
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CN202010351954.2A
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张传胤
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Anhui Panjing Cement Co ltd
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Anhui Panjing Cement Co ltd
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Priority to CN202010351954.2A priority Critical patent/CN111499230A/en
Publication of CN111499230A publication Critical patent/CN111499230A/en
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

The invention discloses a coal gangue solid waste used as a raw material admixture, which comprises: limestone, coal gangue, sandstone and non-ferrous metal ash, wherein the limestone: 85% -95%, coal gangue: 2% -10% of sandstone: 3% -9%, non-ferrous metal ash: 2% -5%, SiO in the coal gangue252 to 65 percent; al (Al)2O316 to 36 percent; fe2O32% -15%; CaO is 0.25 to 2.5 percent; MgO is 0.2 to 2.5 percent; TiO 220.5% -4%; p2O50.005% -0.25%; k2O is 0.5 to 2 percent; na (Na)2O is 0.5 to 2 percent; v2O50.01% -0.1%, wherein the limestone contains SiO 2: 10% -30% of Al2O3：5％～15％，Fe2O3：5％10% of CaO, CaO: 46% -53%, the sandstone contains SiO2：65％～80％，Al2O3：7％～12％，Fe2O3: 1.0-3.0%, CaO: 1% -5%, the non-ferrous metal ash contains SiO2：20％～30％，Al2O3：9％～20％，Fe2O3: 4% -6%, CaO: 50% -55%, the invention has the advantages that the coal gangue is used to replace clay mineral required in cement production, thereby reducing resource waste and reducing the pollution of the coal gangue to the environment.

Description

Coal gangue solid waste material as raw material admixture
Technical Field
The invention relates to the technical field of cement raw materials, in particular to a coal gangue solid waste material used as a raw material admixture.
Background
The coal gangue is solid waste generated in the production and processing processes of coal, the annual emission amount is about 10 percent of the annual coal yield, 30 hundred million tons of coal are accumulated and stored at present, the occupied area is about 1.2 million hectares, and the coal gangue is one of the industrial solid waste with the largest emission amount in China at present. The coal gangue is stockpiled for a long time, occupies a large amount of land, causes spontaneous combustion and pollutes the atmosphere and underground water quality. The coal gangue is also an available resource, and the comprehensive utilization of the coal gangue is an important component of the comprehensive utilization of the resource. The comprehensive utilization of the coal gangue has been greatly developed since 'eighty-five', the utilization approaches are continuously enlarged, and the technical level is continuously improved. But the comprehensive utilization technology of coal gangue in China is still relatively laggard, the technical content of the product is not high, and the comprehensive utilization development is unbalanced. The comprehensive utilization of the coal gangue is vigorously carried out, so that the economic benefit of enterprises can be increased, the land occupation can be reduced, and the environmental quality can be improved. Therefore, comprehensive utilization of coal gangue is a long-term technical policy.
At present, a large amount of coal gangue is generated during independent mining of the company, and is stacked at the periphery of a mine field at ordinary times, so that the land is occupied, the ecological environment is influenced, the leaching water of the coal gangue pollutes surrounding soil and underground water, the coal gangue contains certain combustible substances, spontaneous combustion occurs under proper conditions, harmful gases such as sulfur dioxide, nitrogen oxides, carbon oxides, smoke dust and the like are discharged to pollute the atmospheric environment, the physical health of residents in the mine field is influenced, and combustible components and useful mineral phases in the coal gangue are in a waste state. With the shortage of clay resources and the increase of national environmental protection, it is important to find reasonable substitute resources of clay minerals in cement production.
Disclosure of Invention
The invention aims to provide a coal gangue solid waste material as a raw material admixture, which has the advantages of reducing resource waste and reducing environmental pollution caused by coal gangue by replacing clay minerals required in cement production with the coal gangue, and solves the problems that the coal gangue is stacked around a mine site at ordinary times, not only occupies the land and affects the ecological environment, but also pollutes surrounding soil and underground water due to gangue eluviation water, and the coal gangue contains certain combustible substances, self-ignites under proper conditions, discharges harmful gases such as sulfur dioxide, nitrogen oxide, carbon oxide, smoke dust and the like to pollute the atmospheric environment and affect the body health of residents in a mine area, and is in a waste state of combustible components and useful mineral phases in the coal gangue. With the shortage of clay resources and the increase of national environmental protection, the search for reasonable substitute resources of clay minerals in cement production is an important problem.
In order to achieve the purpose, the invention provides the following technical scheme: a coal gangue solid waste material used as a raw material admixture comprises: limestone, coal gangue, sandstone and non-ferrous metal ash.
Preferably, the proportions of the limestone, the coal gangue, the sandstone and the nonferrous metal ash are respectively limestone: 85% -95%, coal gangue: 2% -10% of sandstone: 3% -9%, non-ferrous metal ash: 2 to 5 percent.
Preferably, the limestone contains SiO 2: 10-30%, Al2O 3: 5% -15%, Fe2O 3: 5-10%, CaO: 46 to 53 percent.
Preferably, the sandstone comprises SiO 2: 65% -80%, Al2O 3: 7% -12%, Fe2O 3: 1.0-3.0%, CaO: 1 to 5 percent.
Preferably, the SiO2 content in the coal gangue is 52-65%; 16 to 36 percent of Al2O 3; 2 to 15 percent of Fe2O 3; CaO is 0.25 to 2.5 percent; MgO is 0.2 to 2.5 percent; TiO 220.5% -4%; p2O50.005% -0.25%; k2O is 0.5 to 2 percent; na (Na)2O is 0.5 to 2 percent; v2O50.01 to 0.1 percent.
Preferably, the nonferrous metal ash contains SiO2：20％～30％，Al2O3：9％～20％，Fe2O3：4％～6％，CaO：50％～55％。
Preferably, the limestone, coal gangue, sandstone and non-ferrous metal ash are respectively added into a pulverizer for pulverizing before mixing, and the diameter of the grinding particles is between 40 and 45 um.
Preferably, the particles of the ground limestone, coal gangue, sandstone and non-ferrous metal ash are added into a mixer according to a certain proportion before sintering, and are stirred and mixed, so that the heterogeneity is reduced continuously.
Preferably, the fineness of the raw material after the limestone, coal gangue, sandstone and non-ferrous metal ash mixed grinding material is normally controlled within 18 percent +/-2 percent of the fineness of 0.08 sieve residue and within 1.6 percent of the fineness of 0.2 sieve residue.
Preferably, the coal gangue is matched and crushed with limestone in mining and then is fed into a small storage bin through a reclaimer for blending and use in a limestone pre-homogenizing storage yard.
Compared with the prior art, the invention has the beneficial effects that: through the research on the quality control and pretreatment of coal gangue raw materials, the proportion of coal gangue as admixture, raw material powder grinding process control and firing process control, the comprehensive utilization of solid waste of the coal gangue is realized, the production cost is reduced, the energy consumption is saved, the coal gangue is matched and crushed with limestone in mining, then the limestone is pre-homogenized in a storage yard, and the coal gangue is fed into a small storage bin through a material taking machine for proportioning use, the coal gangue is good in grindability, the influence on the process and the machine-hour yield of a raw material grinding machine is small, the coal gangue is matched in the limestone for use, a certain coal saving effect is realized on the standard coal consumption of a kiln system, the coal gangue is mainly dependent on the self heat productivity, but the change of the outlet temperature of a primary barrel is noticed constantly in the process, the phenomena of incomplete combustion and coal leakage of the coal gangue are avoided, the tail coal consumption is adjusted timely, the clinker heat distribution quantity, and the outlet temperature of the primary cylinder is increased by 5-10 ℃ compared with the unused time.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provided by the invention comprises the following steps:
example 1:
a coal gangue solid waste material used as a raw material admixture comprises: limestone, gangue, sandstone and non ferrous metal lime-ash, add limestone, gangue, sandstone and non ferrous metal lime-ash respectively in the crocus machine and carry out the crocus before the mixing to make the abrasive particle diameter between 40-45um, the granule of limestone, gangue, sandstone and non ferrous metal lime-ash after will grinding is added in the blender according to certain proportion and is stirred the mixture before the sintering, makes its heterogeneity constantly reduce, the proportion of limestone, gangue, sandstone and non ferrous metal lime-ash is the limestone respectively: 90% and coal gangue: 2% of sandstone: 5.8%, non-ferrous metal ash: 2.2 percent of SiO in coal gangue2Is 57%; al (Al)2O3Is 21 percent; fe2O3Is 11%; CaO is 1.15%; MgO accounts for 2 percent; TiO 224 percent; p2O50.25%; k2O is 2 percent; na (Na)2O is 1.55 percent; v2O50.05% of the non-ferrous metal ash slag contains SiO2：30％，Al2O3：9％，Fe2O3: 6%, CaO: 55 percent by controlling and pretreating the quality of coal gangue raw materials and producing coal gangueThe research of the proportion of the blending material, the raw material grinding process control and the firing process control realizes the comprehensive utilization of the solid waste of the coal gangue, reduces the production cost and saves the energy consumption, the coal gangue is matched and crushed with limestone in mining, then the limestone is pre-homogenized in a storage yard and is fed into a small storage bin by a material taking machine for use, the grindability of the coal gangue is better, the influence on the process and the machine hour yield of a raw material grinding machine is smaller, the coal gangue is matched in the limestone for use, the standard coal consumption of a kiln system is saved to a certain extent, the coal gangue is mainly dependent on the heat productivity of the coal gangue, but the change of the outlet temperature of a primary cylinder is noticed all the time in the process, the phenomena of incomplete combustion and coal leakage of the coal gangue are avoided, the tail coal consumption is adjusted in time, the heat distribution amount of clinker is reduced by 50-70 kilocalories, and the outlet temperature of the primary, the fineness of the raw materials after the limestone, coal gangue, sandstone and non-ferrous metal ash mixed grinding materials is normally controlled within 18 percent +/-2 percent of the fineness of 0.08 after-screen fineness and within 1.6 percent of the fineness of 0.2 after-screen fineness, and the coal gangue is matched and crushed with the limestone in mining and then enters a limestone pre-homogenization storage yard to be fed into a small storage bin for proportioning through a material taking machine.
Example 2:
a coal gangue solid waste material used as a raw material admixture comprises: limestone, gangue, sandstone and non ferrous metal lime-ash, add limestone, gangue, sandstone and non ferrous metal lime-ash respectively in the crocus machine and carry out the crocus before the mixing to make the abrasive particle diameter between 40-45um, the granule of limestone, gangue, sandstone and non ferrous metal lime-ash after will grinding is added in the blender according to certain proportion and is stirred the mixture before the sintering, makes its heterogeneity constantly reduce, the proportion of limestone, gangue, sandstone and non ferrous metal lime-ash is the limestone respectively: 91% and coal gangue: 3% of sandstone: 3% of non-ferrous metal ash: 3% of SiO in coal gangue2Is 60 percent; al (Al)2O3Is 13%; fe2O315 percent; CaO is 1.15%; MgO is 2.5%; TiO 224 percent; p2O50.25%; k2O is 2 percent; na (Na)2O is 2 percent; v2O50.1 percent of non-ferrous metal ash slag containingSiO2：20％，Al2O3：20％，Fe2O3: 10%, CaO: 50 percent, realizes the comprehensive utilization of the solid waste of the coal gangue by researching the quality control and pretreatment of the coal gangue raw material, the proportion of the coal gangue as the admixture, the raw material grinding process control and the firing process control, reduces the production cost and saves the energy consumption, the coal gangue is matched and crushed with the limestone in mining, then the limestone is pre-homogenized and stockpiled, and is matched and used by a small storage bin through a material taking machine, the coal gangue has better grindability, the influence on the process and the machine-hour yield of a raw material grinder is small, the coal gangue is matched in the limestone for use, a certain coal saving effect is realized on the standard coal consumption of a kiln system, the coal gangue is mainly determined by the self calorific value of the coal gangue, but the change of the outlet temperature of a primary barrel is noticed all the time in the process, the phenomena of incomplete combustion and coal leakage of the coal gangue are avoided, the tail coal consumption is adjusted in time, the clinker heat quantity, and the outlet temperature of the primary cylinder is increased by 5-10 degrees compared with the unused time, the fineness of the raw material after mixing the grinding materials of limestone, coal gangue, sandstone and non-ferrous metal ash and slag is normally controlled within 18% +/-2% of the fineness of 0.08 screen residue and within 1.6% of the fineness of 0.2 screen residue, the coal gangue is matched and crushed with the limestone in mining, and then the crushed material is fed into a small storage bin through a material taking machine for proportioning.
Example 3:
a coal gangue solid waste material used as a raw material admixture comprises: limestone, gangue, sandstone and non ferrous metal lime-ash, add limestone, gangue, sandstone and non ferrous metal lime-ash respectively in the crocus machine and carry out the crocus before the mixing to make the abrasive particle diameter between 40-45um, the granule of limestone, gangue, sandstone and non ferrous metal lime-ash after will grinding is added in the blender according to certain proportion and is stirred the mixture before the sintering, makes its heterogeneity constantly reduce, the proportion of limestone, gangue, sandstone and non ferrous metal lime-ash is the limestone respectively: 85% and coal gangue: 2% of sandstone: 3% of non-ferrous metal ash: 5% of SiO in coal gangue2Is 52%; al (Al)2O3Is 25%; fe2O310 percent; CaO is 2.15%; MgO is 2.5%;TiO24 percent; p2O50.25%; k2O is 2 percent; na (Na)2O is 2 percent; v2O50.1 percent of the non-ferrous metal ash slag contains SiO2：25％，Al2O3：10％，Fe2O3: 10%, CaO: 55 percent, the comprehensive utilization of solid waste of the coal gangue is realized through the research on the quality control and pretreatment of the coal gangue raw material, the proportion of the coal gangue as the admixture, the raw material grinding process control and the firing process control, the production cost is reduced, the energy consumption is saved, the coal gangue is matched and crushed with the limestone in mining, then the limestone is pre-homogenized and stockpiled, and is fed into a small storage bin for proportioning use through a material taking machine, the grindability of the coal gangue is better, the influence on the process and the machine-hour yield of a raw material grinder is small, the coal gangue is matched in the limestone for use, a certain coal saving effect is realized on the standard coal consumption of a kiln system, the coal saving effect is mainly determined by the self calorific value of the coal gangue, but the change of the outlet temperature of a primary barrel is noticed constantly in the process, the phenomena of incomplete combustion and coal leakage of the coal gangue are avoided, the tail coal consumption is adjusted in, and the outlet temperature of the primary cylinder is increased by 5-10 degrees compared with the unused time, the fineness of the raw material after mixing the grinding materials of limestone, coal gangue, sandstone and non-ferrous metal ash and slag is normally controlled within 18% +/-2% of the fineness of 0.08 screen residue and within 1.6% of the fineness of 0.2 screen residue, the coal gangue is matched and crushed with the limestone in mining, and then the crushed material is fed into a small storage bin through a material taking machine for proportioning.
Example 4:
a coal gangue solid waste material used as a raw material admixture comprises: limestone, gangue, sandstone and non ferrous metal lime-ash, add limestone, gangue, sandstone and non ferrous metal lime-ash respectively in the crocus machine and carry out the crocus before the mixing to make the abrasive particle diameter between 40-45um, the granule of limestone, gangue, sandstone and non ferrous metal lime-ash after will grinding is added in the blender according to certain proportion and is stirred the mixture before the sintering, makes its heterogeneity constantly reduce, the proportion of limestone, gangue, sandstone and non ferrous metal lime-ash is the limestone respectively: 95% and coal gangue: 1% of sandstone:1% of non-ferrous metal ash: 3% of SiO in coal gangue2Is 60 percent; al (Al)2O3Is 25%; fe2O3Is 6 percent; CaO is 1.75%; MgO accounts for 2 percent; TiO 22Is 2%; p2O50.25%; k2O is 1.4%; na (Na)2O is 1.55 percent; v2O50.05% of the non-ferrous metal ash slag contains SiO2：30％，Al2O3：15％，Fe2O3: 5%, CaO: 50 percent, realizes the comprehensive utilization of the solid waste of the coal gangue by researching the quality control and pretreatment of the coal gangue raw material, the proportion of the coal gangue as the admixture, the raw material grinding process control and the firing process control, reduces the production cost and saves the energy consumption, the coal gangue is matched and crushed with the limestone in mining, then the limestone is pre-homogenized and stockpiled, and is matched and used by a small storage bin through a material taking machine, the coal gangue has better grindability, the influence on the process and the machine-hour yield of a raw material grinder is small, the coal gangue is matched in the limestone for use, a certain coal saving effect is realized on the standard coal consumption of a kiln system, the coal gangue is mainly determined by the self calorific value of the coal gangue, but the change of the outlet temperature of a primary barrel is noticed all the time in the process, the phenomena of incomplete combustion and coal leakage of the coal gangue are avoided, the tail coal consumption is adjusted in time, the clinker heat quantity, and the outlet temperature of the primary cylinder is increased by 5-10 degrees compared with the unused time, the fineness of the raw material after mixing the grinding materials of limestone, coal gangue, sandstone and non-ferrous metal ash and slag is normally controlled within 18% +/-2% of the fineness of 0.08 screen residue and within 1.6% of the fineness of 0.2 screen residue, the coal gangue is matched and crushed with the limestone in mining, and then the crushed material is fed into a small storage bin through a material taking machine for proportioning.
Example 5:
a coal gangue solid waste material used as a raw material admixture comprises: the limestone, the coal gangue, the sandstone and the non-ferrous metal ash are respectively added into a pulverizer to be pulverized before mixing, the diameter of the pulverized particles is between 40 and 45 mu m, and the particles of the pulverized limestone, coal gangue, sandstone and non-ferrous metal ash are added into the pulverizer according to a certain proportion before sinteringStirring and mixing in the mixer to reduce the heterogeneity continuously, wherein the proportions of limestone, coal gangue, sandstone and non-ferrous metal ash are respectively limestone: 90% and coal gangue: 2% of sandstone: 2% of non-ferrous metal ash: 6 percent of SiO in the coal gangue2Is 60 percent; al (Al)2O3Is 25%; fe2O310 percent; CaO is 2 percent; MgO accounts for 2 percent; TiO 22Is 2%; p2O50.2 percent; k2O is 1.5 percent; na (Na)2O is 1.5 percent; v2O50.1 percent of the non-ferrous metal ash slag contains SiO2：20％，Al2O3：20％，Fe2O3: 5%, CaO: 55 percent, the comprehensive utilization of solid waste of the coal gangue is realized through the research on the quality control and pretreatment of the coal gangue raw material, the proportion of the coal gangue as the admixture, the raw material grinding process control and the firing process control, the production cost is reduced, the energy consumption is saved, the coal gangue is matched and crushed with the limestone in mining, then the limestone is pre-homogenized and stockpiled, and is fed into a small storage bin for proportioning use through a material taking machine, the grindability of the coal gangue is better, the influence on the process and the machine-hour yield of a raw material grinder is small, the coal gangue is matched in the limestone for use, a certain coal saving effect is realized on the standard coal consumption of a kiln system, the coal saving effect is mainly determined by the self calorific value of the coal gangue, but the change of the outlet temperature of a primary barrel is noticed constantly in the process, the phenomena of incomplete combustion and coal leakage of the coal gangue are avoided, the tail coal consumption is adjusted in, and the outlet temperature of the primary cylinder is increased by 5-10 degrees compared with the unused time, the fineness of the raw material after mixing the grinding materials of limestone, coal gangue, sandstone and non-ferrous metal ash and slag is normally controlled within 18% +/-2% of the fineness of 0.08 screen residue and within 1.6% of the fineness of 0.2 screen residue, the coal gangue is matched and crushed with the limestone in mining, and then the crushed material is fed into a small storage bin through a material taking machine for proportioning.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. The coal gangue solid waste serving as the raw material admixture is characterized by comprising the following components: limestone, coal gangue, sandstone and non-ferrous metal ash.
2. The coal gangue solid waste as the admixture for the raw meal as set forth in claim 1, characterized in that: the proportion of the limestone, the coal gangue, the sandstone and the non-ferrous metal ash is respectively limestone: 85% -95%, coal gangue: 2% -10% of sandstone: 3% -9%, non-ferrous metal ash: 2 to 5 percent.
3. The coal gangue solid waste as the admixture for the raw meal as set forth in claim 1, characterized in that: the limestone contains SiO 2: 10-30%, Al2O 3: 5% -15%, Fe2O 3: 5-10%, CaO: 46 to 53 percent.
4. The coal gangue solid waste as the admixture for the raw meal as set forth in claim 1, characterized in that: the sandstone comprises SiO 2: 65% -80%, Al2O 3: 7% -12%, Fe2O 3: 1.0-3.0%, CaO: 1 to 5 percent.
5. The coal gangue solid waste as the admixture for the raw meal as set forth in claim 1, characterized in that: SiO in the coal gangue252 to 65 percent; al (Al)2O316 to 36 percent; fe2O32% -15%; CaO is 0.25 to 2.5 percent; MgO is 0.2 to 2.5 percent; TiO 220.5% -4%; p2O50.005% -0.25%; k2O is 0.5 to 2 percent; na (Na)2O is 0.5 to 2 percent; v2O50.01 to 0.1 percent.
6. The coal gangue solid waste as the admixture for the raw meal as set forth in claim 1, characterized in that: the non-ferrous metal ash contains SiO2：20％～30％，Al2O3：9％～20％，Fe2O3：4％～6％，CaO：50％～55％。
7. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: before mixing, the limestone, coal gangue, sandstone and non-ferrous metal ash are respectively added into a pulverizer to be pulverized, and the diameter of the pulverized particles is between 40 and 45 um.
8. The admixture for raw meal made of fly ash solid waste according to claim 1, which is characterized in that: before sintering, the ground particles of limestone, coal gangue, sandstone and non-ferrous metal ash are added into a mixer according to a certain proportion to be stirred and mixed, so that the heterogeneity is continuously reduced.
9. The coal gangue solid waste as the admixture for the raw meal as set forth in claim 1, characterized in that: the fineness of the raw material after the limestone, coal gangue, sandstone and non-ferrous metal ash mixed grinding material is normally controlled within 18 percent +/-2 percent of the fineness of 0.08 after-screening and within 1.6 percent of the fineness of 0.2 after-screening.
10. The coal gangue solid waste as the admixture for the raw meal as set forth in claim 1, characterized in that: the coal gangue is matched and crushed with limestone in mining and then is fed into a limestone pre-homogenization storage yard and is fed into a small storage bin by a material taking machine for proportioning.
CN202010351954.2A 2020-04-28 2020-04-28 Coal gangue solid waste material as raw material admixture Pending CN111499230A (en)

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