Cauldon Cement Kiln

Cauldon Cement Kiln
Site Location See Cement Kilns → page for a larger UK Wide map.
Waste Licence	TP3334AW
Operator	Aggregate Industries t/a Lafarge Cement
Parent Company	LafargeHolcim
Clinker Capacity	0.9 Mt

Summary site information collated from a variety of sources.

Cauldron Cement Works - source Alan Murray-Rust 2006

Overview

WikiWaste has used the website Cement Plants and Kilns in Britain and Ireland extensively for the reference material for each individual cement kiln page. The detail on this reference website is extensive and as WikiWaste is focused upon the UK waste and resource market, only the key highlights are captured from this website (and company websites accordingly) to provide background and context. Cauldon started operating in 1957 and up to 2015 had produced 40 million tonnes of clinker through 4 rotary kilns over this period.

Ownership

• 1957 to 2001 BPCM (G&T Earles) (Blue Circle)
• 2001 to 2013 Lafarge
• 2013 to 2015 Lafarge Tarmac
• 2015 to Present LafargeHolcim (Lafarge Cement is part of Aggregate Industries, which itself is owned by LafargeHolcim)

The Process at Cauldon

The following summary diagram is from the Aggregate Industries website which is a 'dry process':

Schematic of Cauldron dry manufacturing process - source Aggregate Industries website

Raw Materials

The primary raw materials are Carboniferous Limestone from Cauldon Low Quarry to the south of the site and Carboniferous Shale in a nearby deposit to the north and west of the plant.

Waste Used on Site

The Cauldon site waste return to the EA for the most recent year showed the following wastes used on site, which were used primary for the purpose of substituting fuel requirements in the plant:

Waste Class	Description	Tonnage Input
01 04 08	waste gravel and crushed rocks other than those mentioned in 01 04 07	0
02 02 02	animal-tissue waste	0
02 02 03	materials unsuitable for consumption or processing	0
06 02 01*	calcium hydroxide	0
10 01 02	coal fly ash	0
10 01 15	bottom ash, slag and boiler dust from co-incineration other than those mentioned in 10 01 14	0
10 02 13*	sludges and filter cakes from gas treatment containing dangerous substances	0
16 01 03	end-of-life tyres	25,854
16 08 04	spent fluid catalytic cracking catalysts (except 16 08 07)	0
19 01 13*	fly ash containing dangerous substances	0
19 02 08*	liquid combustible wastes containing dangerous substances	12,020
19 02 10	combustible wastes other than those mentioned in 19 02 08 and 19 02 09	0
19 08 05	sludges from treatment of urban waste water	23,062
19 08 13*	sludges containing dangerous substances from other treatment of industrial waste water	0
19 09 02	sludges from water clarification	0
19 12 01	paper and cardboard	0
19 12 04	plastic and rubber	0
19 12 10	combustible waste (refuse derived fuel)	327
19 12 11*	other wastes (including mixtures of materials) from mechanical treatment of waste containing dangerous substances	0
19 12 12	other wastes (including mixtures of materials) from mechanical treatment of wastes other than those mentioned in 19 12 11	0

In early June 2021 Aggregate Industries confirmed that they had broken ground on a £13m project to increase their ability to handle up to 100,000 tonnes per annum of waste derived fuel from early 2020