Granules containing agglomerated bulk material

Abstract

The invention relates to granules composed of agglomerated reactive bulk material and a binder matrix, the binder matrix comprising as binder an organic or inorganic salt.

Claims

1.-14. (canceled)

15. Granules containing at least one agglomerated reactive bulk material and a binder matrix, wherein the binder matrix contains an inorganic salt as the binder, wherein the reactive bulk material is a bulk material that undergoes a violent and immediate chemical reaction when granulated in the presence of water and the proportion of bulk material in the granules is in the range from 85 to 99% and the melting point of the binder is below 600 C. and wherein the apparent density of the granules is in the range from 0.7 to 1.2, wherein the binder contains one or more of calcium nitrate, and/or boron trioxide.

16. Granules according to claim 15, wherein the melting point of the binder is lower than the melting point of the reactive bulk material.

17. Granules according to claim 15, wherein the melting point of the binder is in the range from 100 C. to 600 C.

18. Granules according to claim 15, wherein the bulk material contains a reactive lime-based material.

19. Granules according to claim 15, wherein the binder contains one or more selected from, calcium, boron, nitrogen, or oxygen.

20. Granules according to claim 15, wherein the bulk material has an average grain size of 0 to 100 m, and/or a D50 value of 40 to 60 m.

21. Granules according to claim 15, wherein the granules have a grain size of 1 mm or above.

22. Granules according to claim 15, wherein the proportion of binder in the granules is in the range from 1 to 15%.

23. Granules according to claim 15, wherein the ratio of bulk material to binder varies in the range from 1:5 to 1:100.

24. Method for the improvement of steel or refractory comprising adding granules according to claim 6, in the manufacture of steel or refractory.

25. Granules according to claim 15, wherein the lime-based material is selected from the group consisting of quicklime, CaO, calcined dolomite, MgO.CaO, calcined magnesite, MgO, mixtures of these substances, and mixtures of these substances with the respective carbonates or other input materials.

26. Granules according to claim 15, wherein the granules have a grain size of 1 to 6 mm.

27. Granules consisting of at least one agglomerated reactive bulk material and a binder matrix, wherein the binder matrix contains at least one organic or inorganic salt as the binder, wherein the reactive bulk material is a bulk material that undergoes a violent and immediate chemical reaction when granulated in the presence of water and the proportion of bulk material in the granules is in the range from 85 to 99% and the melting point of the binder is below 600 C. and wherein the apparent density of the granules is in the range from 0.7 to 1.2.

Description

Example: Production of Granules According to the Invention

[0060] 1. 62 g of boric acid are dehydrated by heating and melted. Approximately 26 g of boron trioxide are obtained. The boron trioxide is cooled and ground. The powder is mixed with 150 g of fine lime and pressed to form a solid body. The body is heated for one minute to a temperature of at least 700 C. High strength granules are obtained.

[0061] 2. Approximately 24 g of calcium nitrate tetrahydrate are dehydrated by heating and melted. Approximately 16 g of calcium nitrate are obtained. The molten calcium nitrate is placed on a heated bed of lime and the mixture heated further at approximately 700 C. for two minutes and stirred with a refractory rod. High strength granules are obtained.