WO2008122678A1

WO2008122678A1 - Mixture of minerals and fluxes for obtaining metallurgical coke (variants)

Info

Publication number: WO2008122678A1
Application number: PCT/ES2007/000199
Authority: WO
Inventors: Boris Musokhranov
Original assignee: Boris Musokhranov
Priority date: 2007-04-10
Filing date: 2007-04-10
Publication date: 2008-10-16
Also published as: EP2103667A1; EA200801980A1; AU2007350817A1; EP2103667A4; EA015018B1

Abstract

The invention concerns chemical production of coke, in particular compositions for preparing metallurgical coke. Mixture for obtaining metallurgical coke with an optimal ratio of components from all-in-one coals of different types, which contain: 25-65% in mass of fat or gaseous-fat coals and 35-75% in mass of lean coke coals; 25-40% in mass of fat coals, 35-60% in mass of low-agglomerating coke coals and 5-35% in mass of lean coke coals; 30-55% in mass of gaseous-fat coals, 30-60% in mass of low-agglomerating coke coals and 5-20% in mass of lean coke coals; 35-40% in mass of fat coals, 5-15% in mass of gaseous-fat coals and 50-55% in mass of low-agglomerating coke coals; 10-30% in mass of fat coals, 20-30% in mass of gaseous-fat coals, 20-60% in mass of low-agglomerating coke coals and 5-25% in mass of lean coke coals.

Description

MIXING OF MINERALS AND FOUNDATIONS FOR OBTAINING METALLURGICAL COK (VARIANTS)

The invention relates to the chemical production of coke, in particular to the compositions for the preparation of metallurgical coke.

Coking coals are characterized by a high degree of carbonization represented by the free swelling index FSI, and a low production of volatile substances or a high degree of reflectivity of the vitrinite Ro, which produce a high yield of coke. Such coals at the beginning were coals of the type: coke C, and coke coals CG. However, currently, due to the shortage of the reserve of coking coal of type C and CG, the need for the use of all-in-one coals of different types has arisen.

Different compositions of mixing minerals and carbon fluxes of different types for the production of coke are known. Generally, for the improvement of the degree of carbonization of the mixtures, different additives such as coal pitch, tar and crude oil pitch, crushed rubber and other additives are used therein.

Thus, according to the patent RF 2124548 N ^0, C 10 B 57/04, published 01.10.1999 in the mixture of minerals and carbon fluxes, having reduced binder component of a good quantity of coke breeze is added oil prepared according to a particular technique.

In the mixture of minerals and fluxes, used in the method described in the patent RF N ⁰ 2135543, C 10 B 53/08, C 10 B 57/08, published on 27.08.1999, which contains carbons of the gaseous, fatty type, blackened binder and low binder capacity with a low ash factor, an additive containing a waste of melted pitch is used in the chemical production of coke.

According to the patent RF N ⁰ 2186823, c 10 B 57/06, C 10 B 53/08, published on 10.08.2002, in the mixture of minerals and fluxes, which It contains coal of different types such as: gaseous-fatty, fatty, coke, low binder, blackened binder, low coke binder capacity, an aggregate is introduced from the remains of the chemical production of coke, deposited in the crumbled rubber of technical articles made of rubber.

However, the use of additives requires special preparation of these, and therefore complicates the technique of preparing the mixture of minerals and fluxes. Apart from that, it is known that the breas are currently used totally in the electronics industry and are expensive and scarce. Petroleum products are also a matter of high cost.

The use of rubber provides a complementary amount of sulfur whose proportion in the coke is limited.

The mixture of mineral and fluxing nearest Ia given by the composition of carbon is the mixture for the production of metallurgical coke (RF Patent N ⁰ 2224782, MPK C 10 B 57/04, published 27.02.2004), which contains carbons of the type: greasy 20-30 gaseous-fatty 15-20 low-capacity coke binder 20-40 blackened binder, and also containing a binder additive prepared from a product in the form of pitch obtained according to a particular technique from coal with an aggregate, which is mixed with plastic debris.

The main disadvantage of the mixture of minerals and fluxes of the given composition is the need for the use of a binder additive that hinders the preparation technique and increases the losses at the time of obtaining the mixture.

The objective of the invention is to obtain mixing compounds that have an optimal ratio of all-in-one carbon components of different types to produce high quality coke without the use of additives that hinder and improve the technique of preparing the mixture of minerals and fluxes; and also the extension of the base of materials for obtaining the mixture.

The proposed objective is achieved through the use of the following variants of the composition of the mixture of minerals and fluxes:

- Mixture for obtaining metallurgical coke, which contains fatty coal (G) or gaseous-fatty coal (GG) and low-capacity coking coal (CBCA), in which the carbons are introduced according to the following ratio of components, in% by weight:

fatty or gaseous-fatty carbon 25-65 low-capacity coking coal binder 35-75.

- Mixture for obtaining metallurgical coke, which contains fatty coal (G) or gaseous-fatty coal (GG) and additionally presents blackened coke coal with the following component ratio, in% by weight:

fatty or gaseous-fatty carbon 25-65 blackened coke carbon 35-75.

- Mixture for obtaining metallurgical coke, which contains fatty coal and low-capacity coking coal and additionally presents blackened coke coal with the following component ratio, in% by weight:

fatty coal 25-40 low-capacity coking coal binder 35-60 blackened coking coal 5-35.

- Mixture for obtaining metallurgical coke, which contains gaseous-fatty coal and low-capacity coking coal and, in addition, has coke carbon blackened with Ia following ratio of components, in% by weight:

gaseous-fatty coal 30-55 low-capacity coking coal 30-60 blackened coke coal 5-20.

- Mixture for obtaining metallurgical coke, which contains fatty coal or gaseous-fatty coal (GG) and, in addition, blackened coke coal with the following component ratio, in% by weight

fatty or gaseous-fatty carbon 25-65 blackened coke carbon 35-75.

- Mixture for obtaining metallurgical coke, which contains fatty coal, gaseous-fatty coal and low-capacity coking coal, in which the carbons are introduced according to the following ratio of components, in% by weight

fatty coal 35-40 gaseous-fatty coal 5-15 low-capacity coking coal binder 50-55.

- Mixture for obtaining metallurgical coke, which contains fatty, gaseous-fatty coal and low-capacity coking coal, and in addition it presents blackened coke coal with the following component ratio, in% by weight

10-30 fatty coal gaseous-fatty coal 20-30 low-capacity coking coal binder 20-60 blackened coke coal 5-25.

During the experimentation with the different compositions of the mixture of minerals and fluxes, which have an optimal ratio of components, the properties of coal of different types were used to the binder capacity is increased by means of obtaining the optimum ratio of the indicators of the free swelling index FSI and reflectivity of the vitrinite R ₀ , required to produce quality coke.

Satisfactory quality to produce coke presents coal mixtures of different types that have FSI 5-7 and the value of R ₀ 1, 15-1, 25%, corresponding to the characteristics of coke coal and coke fatty coal.

The quantitative ratio of the components in the variants of the mixtures is chosen in such a way that it satisfies the conditions mentioned below (see table). To guarantee a great freedom of choice during the composition of the mixtures, an approach based on the compensation of the properties of a component is used by exchanging it for two other components.

For a mixture composed of two components G and CBCA the best degree of carbonization is obtained, but nevertheless the cost of the mixture increases and the maximum of the R ₀ value is hardly achieved.

The mixture of two types of GG and CBCA coal has a lower cost, but the degree of carbonization worsens and the Ro value decreases.

The mixture of three types of coal GG, CBCA and CE has a higher value of Ro. However, its degree of carbonization is not very high, which decreases the scope of application of the coke obtained.

The mixture of the other three components G, CBCA and CE has a good degree of carbonization and a higher value of R ₀ . But, it presents a higher cost with respect to the previous mixture.

The mixture of four components GG, G, CBCA and CE allows obtaining a sufficiently high degree of carbonization and also values greater than R ₀ , varying the ratio of the components. But, before this the process of preparing the mixture is difficult. At the same time, the preparation of all the types of mixture described above, does not require complementary technical operations in the chemical production factories of coke, unlike other methods of preparation and mixing compositions. For this reason, the exposed compositions of the coking mixtures allow obtaining a high quality coke and significantly expand the base of materials for obtaining the mixture of minerals and fluxes.

Example of preparation of a mixture of minerals and fluxes.

The mixture for coking is prepared from all-in-one coal of type G, obtained in the "Chertinskaya Koksavaya" mine and from all-in-one coal of the CBCA type obtained in the "Novobachatsky" bank. The all-in-one coal of the all-in-one coal silos in the "Belovskaya" central enrichment factory is dosed in the layered production chain in proportions of 40% of the type G coal and 60% of the CBCA type. The mixture of two layers obtained in the production chain, is directed towards the primary crushing where it is crushed to a size of less than 200 mm, and then it is directed towards the hydroclassification, in which the class with a smaller size of 0.5 mm and then sent to the flotation stage. The class with a size of 13-200 mm is sent for enrichment towards medium-heavy separators. Class 0.5-13 mm is sent for screening. The concentrates of the sieve and the flotation stage are sent together to the drying. After drying, the concentrate is mixed in the production chain with the concentrate from the medium heavy separators, which has undergone a dehydration in the vibrating sieves.

The mixture of the concentrates has a carbon ratio of types G and CBCA equal to 30:70 taking into account the degree of enrichment of each type. The prepared mixture has a reflectivity of

The vitrinite equal to 1.20%, a free swelling coefficient equal to 6, the thickness of the plastic layer equal to 17 mm which makes it suitable for coking itself or in combination with other types of coal. Other examples of preparation of the mixture performed by an analogous method, with the quantitative values of the components according to the variants are set forth in the table.

Table

Claims

1. Mixture of minerals and fluxes to obtain metallurgical coke, which contains fatty, gaseous-fatty and low-capacity coke coals, characterized in that the carbons are introduced according to the following ratio of components, in% by weight

fatty or gaseous carbon - fatty 25-65 low-capacity coking coal binder 35-75.

2. Mixture of minerals and fluxes to obtain metallurgical coke, which contains fatty or gaseous-fatty carbons, characterized in that it contains, in addition, blackened coke carbons with the following ratio of components, in% by weight

fatty or gaseous coal - fatty 25-65 blackened coke coal 35-75.

3. Mixture of minerals and fluxes to obtain metallurgical coke, which contains coals of low-capacity coke, characterized in that it additionally contains blackened coke carbons with the following component ratio, in% by weight

4. Mixture of minerals and fluxes for obtaining metallurgical coke, which contains gaseous-fatty coals and coking coals of low binder capacity, characterized in that it contains, in addition, blackened coke carbons with the following component ratio, in% by weight

gaseous coal - fatty 30-55 low-capacity coking coal 30-60 5-20 blackened coke coal.

5. Mixture of minerals and fluxes to obtain metallurgical coke, which contains fatty, gaseous-fatty and low-capacity coke coals, characterized in that the carbons are introduced with the following ratio of components, in% by weight

fatty coal 35-40 gaseous-fatty coal 5-5 low-capacity coking coal binder 50-55.

6. Mixture of minerals and fluxes to obtain metallurgical coke, which contains fatty, gaseous-fatty and low-capacity coke coals, characterized in that it contains, in addition, blackened coke carbons with the following ratio of components, in% by weight