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A method for producing cement clinker with unlimited compatibility with carbide slag and limestone as raw materials

A cement clinker and limestone technology, which is applied in clinker production, cement production, etc., can solve the problem of incompatibility with calcareous raw materials such as carbide slag and limestone, achieve resource utilization, reduce fuel consumption, and solve pollution environmental effects

Active Publication Date: 2011-11-30
成都建筑材料工业设计研究院有限公司
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Problems solved by technology

[0004] The invention solves the problem that the new dry cement carbide slag technology and the current new dry process cannot be compatible with calcium carbide slag and limestone, and provides a new cement production method with calcium carbide slag, and the calcium raw material can be compatible 100% use of carbide slag and 100% use of limestone and any combination of the two

Method used

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  • A method for producing cement clinker with unlimited compatibility with carbide slag and limestone as raw materials

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Embodiment 1

[0030] Reference attached figure 1

[0031] The new type of dry-process calcium carbide slag making cement technology is compatible with limestone as a calcareous raw material. Its working process includes:

[0032] (1) Kiln tail feeding

[0033] The raw meal at the end of the kiln first passes through the rotary feeder 2 and then enters the three-way valve 3. The three-way valve is connected to two feeding pipes: one way is fed into the air pipe between cyclone preheater 1 and cyclone preheater 4; The air duct between the cyclone preheater 5 and the cyclone preheater 7. The feed pipe under the cyclone preheater 5 is equipped with a feed valve 6 to divide the material into two parts. One part enters the air pipe between the cyclone preheater 7 and the cyclone preheater 8, and the other enters the decomposition furnace 9 for mixing The middle of the room. When limestone is used as a calcareous raw material, the raw meal passes through the three-way valve 3 and then is fed into the...

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Abstract

The invention relates to an unlimited compatible method for producing cement clinker by using carbide slag and limestone as raw materials, belonging to the technical field of resources and environment. The method uses the carbide slag as the calcareous raw materials, and the cement clinker is calcined by using a novel dry technology, which is characterized in that: either 100 percent of carbide slag or 100 percent of limestone can be used as the calcareous raw materials, or the carbide slag and the limestone can be mixed at any ratio for use. A main process comprises the following steps of: (1) kiln rear feeding, in which a preheater can be switched between the stage 3 and the stage 5 through changing a position of a material feeding point; (2) raw material pre-decomposition, in which a five-stage preheater which is switchable to a three-stage preheater and an enhanced suspension spray type decomposition furnace are used in order to combust the fuels and decompose the raw materials, wherein the outlet temperature of the decomposition furnace is controlled between 700 and 890 DEG C; and (3) rotary kiln calcining, in which the decomposed raw materials enter the kiln to be calcined into the cement clinker. The method has the characteristics of high resource regeneration level of the carbide slag, obvious energy-saving and emission-reduction effect, strong system compatibility andthe like.

Description

Technical field [0001] The invention relates to a method for producing cement clinker with unlimited compatibility with calcium carbide slag and limestone as raw materials, belonging to the technical field of resources and environment, in particular to a method for producing cement with unlimited compatibility with calcium carbide slag and limestone as calcareous raw materials and adopting new dry method technology to produce cement Clinker method. Background technique [0002] The calcium carbide process acetylene device is widely used in our country, and a large amount of waste residue (calcium carbide slag) is produced in this process. The main component of calcium carbide slag is Ca(OH) 2 , It will cause serious pollution to the environment and is difficult to handle. However, using calcium carbide slag as a calcareous raw material instead of lime minerals to produce cement clinker is a good way. It can not only eliminate pollution, but also save limestone minerals, reduce ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/43C04B7/14C04B7/34
CPCY02P40/10Y02P40/121
Inventor 文柏鸣高敏蔡顺华陈军磊
Owner 成都建筑材料工业设计研究院有限公司
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