Board of Trade Working Party Reports
Page 49
China-clay ", 1948. (H.M.S.O. Price 2s. 6d.)
By difference...
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101 Cmga bayobo reason of its white colour and gent nature is used as a filler in the paper and other industries including rubber, paint, etc. It also supplies the essential raw material for pottery, etc. eido dogsb
102. The following industries comprise the main users of china clay (shown in alphabetical order)
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Foundries and steelworks. High temperature refractories. Linoleum and oil industry.com 1 Manufacturers of pottery
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There are also a large number of miscellaneous industriest wolfoft
901039 In the UK. trade it has been estimated (Working Party Report) that last year out of a total demand for 323,000 tons of clay, approximately 50 per cent would be needed for paper making and 20 per cent. for pottery.
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760V 'E 2001 000,00Pto de only or bauen sist (nor) noibbeb * 104. The Working Party Report states that at the rate of production of about 1 million tons of china clay a year, resources in Cornwall and Devon would last at least for 100 years if efficiently developed. This excludes possible future discoveries in areas where china clay has not yet been worked. The main basis for this statement is that the superficial extent of the china clay occurrences is fairly well-known, kaolinisation being more intense in the western and south-western portions of the granite masses where, generally speaking well-sited pits have not yet been bottomed The mode of origin of the china clay suggests, furthermore, that deposits will persist in depth and that its quality is not likely to deteriorate in fact kaolinisation has been proved at depths greater than those in the deepest pitsbo gu
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105. The Working Party draw attention to the way in which the avail. ability of the unworked clay, and the cost of its extraction, would be affected by inefficient working, and to difficulties, especially in the St. Austell area, of finding sufficient space at the surface for tipping waste material. In the past, such sand dumps have often covered workable china clay. The annual production of 1 million tons of clay means that "pro- vision must be made to dump 3-4 million tons of sand each year. It is clear, therefore, that assuming the industry continues for another 100 years the problem is a major one. wo OOH! INA
106. They also point out the need for the unification of mineral rights, not only to meet this difficulty, but also to ensure that if clay is to be followed to greater depths, it will be possible to provide that those pits from which the resources can best be developed at these greater depths have the necessary room for lateral expansion.quoi dalla poiteitate off or gribnotga
$107. Although adequate resources of china clay are likely to exist for our future needs for many years to come, the development of the industry, as suggested by the Working Party, will have to be planned well ahead in order that the resources can be worked economically and without restriction.
OLDJOBÓTA
108. In certain cases it is suggested that surveys should be carried out in order to delimit more accurately by boreholes or other means the extent of the deposits in order that a development programme can be properly planned.Page 50 of 662