TW201600541A - Method of converting waste into slag forming agent and flux - Google Patents

Abstract

A method of converting waste into slag forming agent and flux comprises: a cracking step for burning waste in a vacuum environment to crack the waste into carbon blacks; a screening step for using a screen to screen the particle size of the carbon blacks; a magnetic selection step for magnetically adsorbing partial metal slag in the carbon blacks; and an analysis step for confirming that the percentage of fixed carbon in the carbon blacks is above 70% and useful as slag forming agent and flux. Wastes such as waste wheels, plastics, rubbers and the like can be cracked to produce carbon blacks, which may be subjected to the above-described process to allow regeneration and reuse for replacing slag forming agent and flux used in the steelmaking process, thereby thoroughly fulfilling the ideals of environment protection.

Description

Method for making waste into slag forming agent and fluxing agent

The invention relates to a method for preparing a slagging agent and a fluxing agent, in particular to a method for preparing waste into a slagging agent and a fluxing agent.

Humans produce a wide variety of wastes in their daily lives. In order to avoid occupying large amounts of waste and occupying land, wastes are usually incinerated, buried, or otherwise processed to convert waste into renewable. The use of substances to implement the concept of environmental protection can also promote economic development.

Among them, in the treatment of waste tires, plastics and rubber, it is usually treated by cracking to refine the raw oil. In the cracking process, carbon black is produced. Since there is no way to properly use the carbon black, the carbon black produced must be disposed of separately or discharged, which not only adds unnecessary burden to the manufacturer, but also wastes the original waste. The environmental concept of recycling and recycling of materials cannot be completely implemented, and carbon black emitted or discarded will inevitably have adverse effects on the environment. Therefore, practitioners in related fields have no trouble to study the method of properly treating or recycling the carbon black.

Therefore, the object of the present invention is to provide a slag forming agent and a fluxing agent which can properly utilize the carbon black generated by waste cracking. Method of the agent.

Thus, the method of the invention for making waste into a slagging agent and a flux comprises a cracking step, a screening step, a magnetic separation step, and an analysis step.

The cracking step is to burn the waste in a vacuum environment to crack the waste to produce carbon black.

The sieving step is to screen the particle size of the carbon black by a sieve to obtain carbon black particles having a particle size of a specific size or less.

The magnetic separation step is to magnetically adsorb a part of the metal residue in the carbon black to exclude unnecessary metal components in the carbon black.

The analysis step is to confirm that the fixed carbon in the carbon black is above 70%, and is used as a slag forming agent and a flux required in the steel making process.

The effect of the invention is that the waste is burned in a vacuum environment to be cracked, and the generated carbon black can be regarded as a build after confirming that the fixed carbon component is above 70% after passing through the screening step and the magnetic separation step. The slag and flux are used in the steel making process.

11‧‧‧Cleaning step

12‧‧‧ screening step

13‧‧‧Magnetic selection steps

14‧‧‧Analysis steps

102‧‧‧ fine screening steps

103‧‧‧Re-magnetic separation step

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a flow chart illustrating a preferred method of the invention for making waste into a slagging agent and a fluxing agent. Example.

Referring to Figure 1, the present invention uses waste as a slag forming agent and a fluxing agent. A preferred embodiment of the method includes a cracking step 11, a screening step 12, a magnetic separation step 13, a fine screening step 102, a re-magnetic separation step 103, and an analysis step 14.

The cracking step 11 is to burn the waste in a vacuum environment to cleave the waste to produce carbon black. Combustion in a vacuum environment, because it is not in contact with oxygen, can maintain the calorific value of the substance, avoid complete combustion and oxidize the desired components, so that the burned product can no longer be used for other purposes. Among them, in the cracking step 11, the combustion is carried out at a temperature ranging from 500 °C to 900 °C.

The sieving step 12 is performed by screening the particle size of the carbon black by a sieve to obtain carbon black particles having a particle size of a specific size or less. In the sieving step 12, the particle size of the carbon black is screened to 1 mm or less by a sieve.

The magnetic separation step 13 is to magnetically adsorb a part of the metal residue in the carbon black to exclude unnecessary metal components in the carbon black.

The fine screening step 102 is to screen the particle size of the carbon black to 0.25 mm or less by using a sieve which is finer than the screening step 12.

The remagnetic separation step 103 is to magnetically refine the finely sieved carbon black, and the carbon black passing through the fine screening step 102 has a finer particle size, and only passes through the carbon black of the screening step 12, wherein the metal having a smaller particle size The composition may be blocked in a plurality of carbon blacks having a large particle size and cannot be excluded by the magnetic separation step 13. After the fine screening step 102, the re-magnetic separation step 103 is performed, and the metal component which is not excluded due to the excessively small particle size in the magnetic separation step 13 can be excluded.

The analysis step 14 confirms that the fixed carbon in the carbon black is 70% or more, and is used as a slag forming agent and a flux required in the steel making process. Reference Referring to Table 1, the analysis step 14 is to analyze the ash, volatile matter, fixed carbon, and total sulfur ratio of the carbon black, and the American Society for Testing and Materials (ASTM) is used for testing. ) The test method specified. Among them, A.D. (Air Dried Basis) represents the air drying base component, and the meaning of the air drying base is the data presented when the sample is placed under normal laboratory conditions (room temperature 20 ° C; relative humidity 60%). D.B. (Dry Basis) is a dry-based component. The meaning of the drying base is to remove the moisture change factor, that is, the data presented after removing the water.

As can be seen from Table 1, the carbon black produced by the above-described respective steps has a fixed carbon component of 70% or more in terms of measurement of the air-drying component or the dry component. The slagging agent used in the steelmaking process is mainly to adjust the composition of the slag, and the flux is added to make the process of melting the material smoother. The carbon black produced after the above various steps is processed and compared with the components used in the steelmaking process. The composition of the slag-forming agent and the fluxing agent is similar, and according to the fact that it is actually added to the steel-making process, the slagging and fluxing effect can be achieved as expected, so it can be confirmed that it can replace the slag-forming agent and flux used originally. Therefore, the slagging agent and the fluxing agent made of waste tires, plastics, rubber and the like can effectively reduce the steelmaking cost originally spent on the conventional slagging agent and combustion improver.

In summary, waste materials such as waste tires, plastics, and rubber are passed through the cracking step 11, the screening step 12, the magnetic separation step 13, the fine screening step 102, the remagnetic separation step 103, and the analysis step. 14. It can produce carbon black which replaces the slag-forming agent and flux used in the steelmaking process, and is actually used in the steel-making process, and has the effect of replacing the slag-forming agent and the fluxing agent, so the invention can be achieved. The purpose.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

11‧‧‧Cleaning step

12‧‧‧ screening step

13‧‧‧Magnetic selection steps

14‧‧‧Analysis steps

102‧‧‧ fine screening steps

103‧‧‧Re-magnetic separation step

Claims (6)

A method for preparing waste into a slag forming agent and a fluxing agent, comprising: a cracking step of burning the waste in a vacuum environment to crack the waste to produce carbon black; and a screening step to screen the carbon black The particle size is screened; a magnetic separation step is used to magnetically adsorb a part of the metal residue in the carbon black; and an analysis step confirms that the fixed carbon in the carbon black is more than 70%, and is used as a slag forming agent and a fluxing agent. A method of preparing waste into a slagging agent and a flux according to claim 1, wherein the cracking step is performed at a temperature between 500 ° C and 900 ° C. A method of forming a waste into a slagging agent and a flux according to claim 1, wherein the sieve step is to screen the particle size of the carbon black to 1 mm or less by using a sieve. The method of preparing waste into a slagging agent and a flux according to claim 1, wherein the analysis step further analyzes the ash, volatile matter, and total sulfur ratio of the carbon black. The method of preparing waste into a slagging agent and a flux as described in claim 1 further comprises a fine screening step and a re-magnetic separation step before performing the analyzing step. The method of preparing waste into a slag forming agent and a flux according to claim 5, wherein the fine screening step is to screen the carbon black particle size to 0.25 mm or less by using a sieve.