阅读说明：本技术 一种低排放全工业废渣制硅酸盐水泥熟料的配料方法 (Batching method for preparing portland cement clinker by low-emission full-industrial waste residues ) 是由 周德立 李永宏 艾长缨 丛龙成 宋纯 李界化 张武 白天省 刘军 邵传淦 于 2019-07-09 设计创作，主要内容包括：本发明公开了一种低排放全工业废渣制硅酸盐水泥熟料的配料方法,该熟料由下列质量份数的原料组成：粉煤灰7～13份,炉渣3～8份,石灰粉末8～15份,铜渣1～7份,钢渣2～9份,电石渣55～68份,硅粉4～10份。本发明二氧化碳排放量低,并可有效解决氯碱工业产生的各类固体废弃物、多晶硅产业产生的硅粉污染等问题,是一种兼具社会效益、经济效益和环保效益的新型工业废渣利用技术。(The invention discloses a batching method for preparing portland cement clinker by using low-emission full-industrial waste residues, wherein the clinker is composed of the following raw materials in parts by weight: 7-13 parts of fly ash, 3-8 parts of furnace slag, 8-15 parts of lime powder, 1-7 parts of copper slag, 2-9 parts of steel slag, 55-68 parts of carbide slag and 4-10 parts of silicon powder. The method has low carbon dioxide emission, can effectively solve the problems of various solid wastes generated in the chlor-alkali industry, silicon powder pollution generated in the polysilicon industry and the like, and is a novel industrial waste residue utilization technology with social benefit, economic benefit and environmental protection benefit.)

1. A batching method for preparing portland cement clinker by using low-emission full-industrial waste residues is characterized by comprising the following steps:

Mixing raw materials: the method comprises the following steps of sequentially drying and grinding fly ash, furnace slag, lime powder, copper slag and steel slag according to a mass ratio, mixing the ground fly ash, the furnace slag, the lime powder, the copper slag and the steel slag with silicon powder and carbide slag to form a raw material, and feeding the raw material into a raw material homogenizing warehouse, wherein the dried components are added in parts by mass: 7-13 parts of fly ash, 3-8 parts of furnace slag, 8-15 parts of lime powder, 2-7 parts of copper slag, 4-9 parts of steel slag, 55-68 parts of carbide slag and 4-10 parts of silicon powder;

Preheating, decomposing and calcining the raw materials obtained in the step 1) in sequence to obtain the cement clinker.

2. The method as claimed in claim 1, wherein the raw material of step 2) is fed into the secondary uptake flue of the preheater by the elevator, and the raw material is preheated and then fed into the primary cyclone, and then fed into the tertiary uptake flue of the preheater, and then fed into the secondary cyclone for gas-solid separation after heat exchange, and finally fed into the smoke chamber via the five-stage cyclone for solid-phase chemical reaction, and then fed into the rotary kiln, and finally, the cement clinker is produced after passing through the reaction zone and the calcining zone.

3. The method for preparing portland cement clinker from low-emission full-industrial waste residues as recited in claim 1, wherein the silica powder and fly ash are not directly fed into the mill, and are mixed with the dry carbide slag dried by the drying tube according to the mass ratio, and then directly fed into the powder concentrator of the grinding system.

4. The method for preparing portland cement clinker from low-emission total industrial waste residues as recited in claim 1, wherein the carbide slag is preheated and dried by flue gas from a calcining kiln and then enters a raw material warehouse.

5. The method as claimed in claim 2, wherein the outlet temperature of the primary cyclone is 450-550 ℃.

6. The blending method for preparing portland cement clinker by using low-emission full-industrial waste residues as claimed in claim 1, wherein the mass ratio of the dried carbide slag to the dried fly ash is controlled to be 5.5-9.0, and the optimal ratio is 6.3-7.2.

7. The method for preparing portland cement clinker from low-emission total industrial waste residues as recited in claim 1, wherein the mass ratio of the slag to the carbide slag and the lime powder is controlled to be 0.57-0.88, and the optimal ratio is 0.62-0.69.

8. The blending method of the low-emission full-industrial waste slag portland cement clinker as claimed in claim 1, wherein the mass ratio of the copper slag and the steel slag to the carbide slag and the lime powder is controlled to be 0.80-2.10, and the optimal ratio is 1.13-1.64.

Technical Field

The invention belongs to the field of building materials, and relates to a batching method for preparing portland cement clinker by using low-emission full-industrial waste residues.

Background

A series of polyvinyl chloride circular economy industrial chains with regional characteristics, including thermal power plants, calcium carbide plants, acetylene plants and chemical plants, are formed by mainly adopting a calcium carbide process in western regions of China and combining regional resource characteristics, and a large amount of solid wastes, mainly comprising fly ash, furnace slag, carbide slag, lime powder and the like, are generated while huge economic benefits are formed, and serious pollution is caused to the atmosphere, soil and underground water due to long-term outdoor stacking. With the national environmental protection importance, the transformation and upgrading of the high-energy-consumption and high-emission industry become more and more urgent.

At present, the dry acetylene technology is mature day by day, the produced carbide slag contains about 10 percent of water, and the water-saving effect is obvious. The low water content of the carbide slag creates conditions for developing a cement dry production line made from the carbide slag, and at present, many enterprises in China have already carried out construction and production operation, but the corresponding technical problems of low utilization rate of the waste slag, low cement strength, large shrinkage, large water absorption, high carbon dioxide emission amount which is easy to crack and the like exist.

Disclosure of Invention

Aiming at the technical defects and the requirement of industrial transformation and upgrading, the existing calcium carbide method polyvinyl chloride circular economy industrial chain is combined, and a batching method for preparing portland cement clinker by using low-emission full industrial waste residues is provided, wherein the cement clinker is composed of the following raw materials in parts by weight: 7-13 parts of fly ash, 3-8 parts of furnace slag, 8-15 parts of lime powder, 2-7 parts of copper slag, 4-9 parts of steel slag, 55-68 parts of carbide slag and 4-10 parts of silicon powder.

As the optimized material ratio, the method for preparing the portland cement by using the low-emission full-industrial waste residue comprises the following raw materials in percentage by weight: 8-11 parts of fly ash, 4-6 parts of furnace slag, 10-13 parts of lime powder, 3-6 parts of copper slag, 5-8 parts of steel slag, 58-65 parts of carbide slag and 5-8 parts of silicon powder.

The batching method for preparing the portland cement clinker by using the low-emission full-industrial waste residues comprises the following specific steps of:

1) Mixing raw materials: sequentially drying and grinding the fly ash, the furnace slag, the lime powder, the copper slag and the steel slag according to the mass ratio, mixing the fly ash, the furnace slag, the lime powder, the copper slag and the steel slag with the silicon powder and the carbide slag to form a raw material, and feeding the raw material into a raw material homogenizing warehouse;

2) Preheating, decomposing and calcining the raw materials obtained in the step 1) in sequence to obtain the cement clinker.

As mentioned above, the raw material passing through the raw material homogenizing warehouse in the step 2) is sent into the secondary uptake flue of the preheater through the hoister, enters the primary cyclone after being preheated, then falls into the tertiary uptake flue of the preheater, enters the secondary cyclone after heat exchange for gas-solid separation, finally falls into the smoke chamber through the five-stage cyclone for heating again before solid-phase chemical reaction, then slides into the rotary kiln, and generates cement clinker after passing through the reaction zone and the calcining zone.

As mentioned above, the silicon slag powder and the dried carbide slag are mixed according to the mass ratio and then enter the powder selecting machine of the grinding system.

As mentioned above, the outlet temperature of the primary cyclone is 450-550 ℃.

as mentioned above, the silicon powder and the fly ash are not directly fed into the mill, and are mixed with the dry carbide slag dried by the drying tube according to the mass ratio, and then directly fed into the powder concentrator of the grinding system.

As mentioned above, the carbide slag enters the raw material warehouse after being preheated and dried by the smoke of the calcining kiln.

As mentioned above, the mass ratio of the dried carbide slag to the dried fly ash is controlled to be 5.5-9.0, and the optimal ratio is 6.3-7.2.

As mentioned above, the mass ratio of the slag to the carbide slag and the lime powder is controlled to be 0.57-0.88, and the optimal ratio is 0.62-0.69.

As mentioned above, the mass ratio of the copper slag and the steel slag to the carbide slag and the lime powder is controlled to be 0.80-2.10, and the optimal ratio is 1.13-1.64.

As mentioned above, the outlet flue of the primary cyclone of the rotary kiln system is directly connected with the drying pipe, and the drying pipe is connected with the carbide slag conveying end of the raw material system and used for drying the carbide slag.

Due to the adoption of the scheme of the invention, the invention has the beneficial effects that:

(1) Because the raw materials are all low-loss-on-ignition components, the process has low carbon dioxide emission.

(2) the raw materials of the process adopt industrial waste residues as raw materials, mainly comprise lime powder generated by a calcium carbide plant, carbide slag generated by an acetylene plant, fly ash and slag generated by a thermal power plant, copper slag generated by a sulfuric acid plant, steel slag generated by a steel mill and silicon powder generated by a polysilicon company, and the problem of pollution caused by a large amount of solid wastes is solved.

Detailed Description