Waste incineration process

• US 5,177,305 A
• Filed: 04/01/1991
• Issued: 01/05/1993
• Est. Priority Date: 04/02/1990
• Status: Expired due to Term

• Current Assignee: Philippe Pichat
• Original Assignee: Philippe Pichat
• Inventors: Pichat, Philippe
• Primary Examiner(s): Bell, Mark L.
• Assistant Examiner(s): Bonnar, C. M.
• Application Number:
  US07/679,505
• Time in Patent Office: 645 Days
• Field of Search: 501/155, 106/DIG. 1, 106/697, 106/745, 106/763.4, 106/705, 106/708, 106/707, 106/734, 423/DIG. 18, 423/DIG. 20, 588/252, 588/256, 588/257, 405/128
• US Class Current: 588/257
• CPC Class Codes: A62D 2101/20 Organic substances
• CPC Class Codes: A62D 2101/24 containing heavy metals
• CPC Class Codes: A62D 2101/40 Inorganic substances
• CPC Class Codes: A62D 2101/43 containing heavy metals, in the bonded or free state
• CPC Class Codes: A62D 3/38 by oxidation; by combustion
• CPC Class Codes: C04B 7/24 Cements from oil shales, residues or waste other than slag
• CPC Class Codes: Y02P 40/10 Production of cement, e.g. improving or optimising the production methods; Cement grinding
• CPC Class Codes: Y10S 106/01 Fly ash
• CPC Class Codes: Y10S 423/18 Treating trash or garbage

Abstract

The process is the type wherein the solid portions of waste materials of all origins are crushed and ground to a granulometry of under 5 mm and then are heated to between 750° C. and 1,350° C. According to the invention, after the addition, if applicable, of liquid waste to obtain a pasty mass, a reagent is added to the latter, in pulverulent form having granules of under 500 microns based with calcium carbonate, silicium oxide and, possibly, aluminum and iron oxides in quantities to produce the following ratio after incineration: ##EQU1## Application to the treatment of all types of waste by combustion.

Claims

1. In a process for incinerating mixtures of wastes of all origins that contain halogen containing compounds, wherein the solid portions are crushed and ground to a granulometry size under approximately 5 mm, a liquid waste is added to produce a pasty mass, and then the entire mixture is heated to approximately 1,000°

C. the improvement comprising,

incorporating into said mixture before heating a reagent in the form of a powder having granules of under 500 microns, containing a product rich in calcium carbonate, silicon oxide, aluminum and iron oxides, the quantity of reagent being measured to obtain the following ratio in the final incinerated product;

##EQU3##

2. Process according to claim 1, wherein said reagent is selected from the group consisting of marl, a mixture of limestone and clay containing at least 70% clay, a mixture of limestone and silicious products, silicious limestone sand, raw preparations for the manufacture of Portland cements or hydraulic limes, and quarry material wash products.

3. Process according to claim 1, wherein said final incinerated product having hydraulic-pozzolanic properties is transformed into a hard and insoluble material by mixing with water or a waste material containing water.

4. A solid incinerated composition produced by the process of claim 1 comprising at least one halogen containing compound and at least one compound selected from the group consisting of metakaolin, surface activated silica, calcium sulfo-aluminates (CaO)₄ Al₂ O₃ SO₄, calcium ferro-aluminates (CaO)₄ Al₂ O₃ Fe₃ O₄, (CaO)₅ (SiO₂)₂ SO₄ and (CaO)₁₂ (Al₂ O₃)₇ X₂, where X is a halogen, and further contains at least one heavy and toxic metal containing compound.

5. Compounds according to claim 4, wherein they also contain chlorinated (CaO)₂ SiO₂.