ASTM C911-05

Standard Specification for Quicklime, Hydrated Lime, and Limestone for Chemical Uses

SCOPE
1.1 This specification covers lime and limestone products suitable for chemical and industrial uses as shown in . The type designations signify the following:Limestone, high-calcium-CLLimestone, dolomitic-DLLimestone, magnesian-MLQuicklime, high-calcium-CQQuicklime, dolomitic-DQQuicklime, magnesian-MQHydrated lime, high-calcium-CHHydrated lime, dolomitic-DHHydrated lime, magnesian-MHHydrated lime, by-product-BH
1.2 The buyer shall designate the use, as listed in , and may specify one or more of the type designations in .
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.4 This test method covers the determination of the amount of free calcium oxide (CaO) in high-calcium hydrated lime capable of being hydrated by steam at atmospheric pressure.

General Information

• Status: Historical
• Publication Date: 30-Apr-2005
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C07 - Lime and Limestone
• Drafting Committee: C07.02 - Specifications and Guidelines

Relations

• Replaces: ASTM C911-99e1 - Standard Specification for Quicklime, Hydrated Lime, and Limestone for Chemical Uses
• Effective Date: 01-May-2005
• Replaced By: ASTM C911-06 - Standard Specification for Quicklime, Hydrated Lime, and Limestone for Selected Chemical and Industrial Uses
• Effective Date: 15-Nov-2006
• Referred By: ASTM D5050-08(2023) - Standard Guide for Commercial Use of Lime Kiln Dusts and Portland Cement Kiln Dusts
• Effective Date: 01-May-2005
• Referred By: ASTM E1266-20 - Standard Practice for Processing Mixtures of Lime, Fly Ash, and Heavy Metal Wastes in Structural Fills and Other Construction Applications
• Effective Date: 01-May-2005
• Referred By: ASTM C25-19 - Standard Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime
• Effective Date: 01-May-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C 911 – 05
Standard Specification for
Quicklime, Hydrated Lime, and Limestone for Chemical and
1
Industrial Uses
This standard is issued under the fixed designation C 911; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope and are on the basis of the weight of sample taken at the place
of manufacture, except as noted in footnote B after the
1.1 This specification covers lime and limestone products
requirement. In this case, the requirement is on a moisture and
suitable for chemical and industrial uses as shown in Table 1.
carbon dioxide-free basis.
The type designations signify the following:
Limestone, high-calcium—CL
NOTE 1—Rags are cooked for the manufacture of paper in a digester
Limestone, dolomitic—DL
under steam pressure with lime or with lime and soda ash. They are then
Limestone, magnesian—ML
washed to eliminate as much of the noncellulose material as possible. A
Quicklime, high-calcium—CQ
standard composition without rejection limits is specified for the reason
Quicklime, dolomitic—DQ
that lime of either higher or lower total oxides, available lime, calcium
Quicklime, magnesian—MQ
Hydrated lime, high-calcium—CH oxide, or calcium hydroxide than the standard, may safely be used under
Hydrated lime, dolomitic—DH
suitable conditions for the purpose herein specified, depending primarily
Hydrated lime, magnesian—MH
upon economic considerations. In the present state of the art, it is believed
Hydrated lime, by-product—BH
that the more serviceable type of specification for the product herein
specified is that which defines a reasonable standard rather than one that
1.2 The buyer shall designate the use, as listed in Table 1,
fixes actual rejection limits. It is generally recognized that, other things
and may specify one or more of the type designations in 1.1.
being equal, lime meeting this standard is preferable to lime that does not,
1.3 This standard does not purport to address all of the
andlimesurpassingthestandardshouldbeconsideredofpremiumquality.
safety concerns, if any, associated with its use. It is the
NOTE 2—Lime is used in the “milk of lime” or “tank” system of sulfite
responsibility of the user of this standard to establish appro-
pulp manufacture for making the cooking liquor. The milk of lime is held
priate safety and health practices and determine the applicabil-
in solution or suspension in a series of tanks equipped with suitable
ity of regulatory limitations prior to use. agitators. The sulfur dioxide (SO ) is forced or drawn through these tanks
2
successively. In some cases, the tanks are built on top of each other in the
form of a tower. The contents of the first tank are drawn off when the
2. Referenced Documents
liquor has reached a certain strength (3.5 to 6 % total SO ) and the
2 2
2.1 ASTM Standards:
contents of the second and third tanks progress to the first and second
C25 Test Methods for Chemical Analysis of Limestone,
tanks respectively.The third tank is again charged with fresh milk of lime.
Quicklime, and Hydrated Lime
There are other systems of absorption that provide for continuous instead
C50 Practice for Sampling, Sample Preparation, Packag- ofintermittentoperation.Thefunctionofthelimeistofurnishthebasefor
the formation of the bisulfites of calcium and magnesium.
ing, and Marking of Lime and Limestone Products
NOTE 3—In the manufacture of silica brick, silica in the form of
C110 Test Methods for Physical Testing of Quicklime,
massive quartzite or quartz conglomerate is ground until the particles are
Hydrated Lime, and Limestone
1
less than ⁄4 in. (6 mm) in size. Lime in the form of either slaked or
hydrated lime is then added in quantities varying from 1.5 to 3.0 %
3. Chemical Composition
calcium oxide (CaO), with sufficient water to produce about 5 to 7 %
3.1 The requirements for quicklime, hydrated lime, and
moisture content, and the shapes are molded and dried. They are then
limestone for the designated end uses are as shown in Table 1, burned in downdraft or tunnel kilns until most of the quartzite has been
converted into tridymite or cristobalite.
NOTE 4—Lime is used for silica removal from boiler feed-water, and
1
for color removal and clarification of water for municipal and industrial
This specification is under the jurisdiction of ASTM Committee C07 on Lime
and is the direct responsibility of Subcommittee C07.03 on Industrial Uses. supplies, for most such applications, high-calcium lime is preferred.
Current edition approved May 1, 2005. Published May 2005. Originally
However, for silica removal from boiler feedwater, dolomitic lime should
e1
ap
...