Claims
- 1. Method for reducing the entrainment of particulate material, having a particle size of less than about 70 microns, in the gases exiting a fluidized bed process for chlorinating titanium containing material comprising:
- introducing the particulate material into the process in the substantial absence of a gas which transports the particulate material, at on or more points which are below the surface of the bed of fluidized particulate material and wherein (a) gas in the amount of about 0.001-0.01 part by weight of gas per part by weight of particulate material is utilized in the introduction of the particulate material to the process, and (b) such gas has a superficial gas velocity of about 0.1-10 feet per second such gas acting as a lubricant or an agent to lessen the binding of the particulate material.
- 2. The process of claim 1 wherein some of the particulate material is coke.
- 3. The process of claim 2 wherein the titanium containing material is titanium containing ore, beneficates of titanium containing ores, titanium-containing by-products or slags or mixtures thereof.
- 4. The process of claim 1 wherein the particulate material comprises solid carbonaceous material.
- 5. The process of any one of claims 1, 2, 3 or 4 wherein an L valve or a pipe with a bend is utilized in the introduction of the particulate material into the process.
- 6. The process of any one of the preceding claims 1, 2, 3 or 4 wherein gas is present in an amount of about 0.0025-0.04 parts by weight of gas per part by weight of particulate material, and such gas has a superficial gas velocity of about 0.5-5 feet per second.
Parent Case Info
This is a continuation of application Ser. No. 07/668,750 filed Mar. 13, 1991, now abandoned, which is a continuation of application Ser. No. 07/540,463 filed Jun. 19, 1990, now abandoned, which is a continuation of application Ser. No. 07/073,233 filed Jul. 13, 1987, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
495102 |
Jan 1977 |
AUX |
9004569 |
May 1990 |
WOX |
Non-Patent Literature Citations (6)
Entry |
Botterill, Fluid-Bed Heat Transfer, Academic Press, 1975, pp. 130-132, 134-140. |
U.S. Ser. No. 07/073,234. |
Glasser et al., "Fluidized Bed Chlorination of Rutile", Society of Mining Engineers Fall Meeting, Gatlinburg, Tenn., Sep. 9-12, 1962. |
Yang, "A Study of Fine Particle Residence Time in a Jetting Fluidized Bed", FE-31063-8-1985. |
Themilis et al., "Fluidized Bed Behavior in Zinc Roasters", Journal of Metals. |
Harris et al., "Fluidized Coke-Bed Chlorinator of Ilmenites", Dept. of Intertior, Investigation Report 8165. |
Continuations (3)
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Number |
Date |
Country |
Parent |
668750 |
Mar 1991 |
|
Parent |
540463 |
Jun 1990 |
|
Parent |
73233 |
Jul 1987 |
|